TABLES AND FORMULAE FOR THE COMPUTATION OF LIFE CONTINGENCIES; WITH COPIOUS EXAMPLES OF ANNUITY, ASSURANCE, AND FRIENDLY SOCIETY CALCULATIONS. SECOND ISSUE, WITH AN ADDENDUM, COMPRISING A LARGE EXTENSION OF THE PRINCIPAL TABLE. BY PETEE GEAY, P.B.A.S., F.B.M.S., HONORARY MEMBER OP THE INSTITUTE OP ACTUARIES J AUTHOR OF TABLES FOR THE FORMATION OF LOGARITHMS AND ANTILOGARITHMS OP TWELVE PLACES, &C. OF THE UNIVERSITY OF CHARLES AND EDWIN LAYTON, 150, FLEET STREET, E.G. 1870. 0. & B. LAYTON, PIIINTEHS, 150, FLEET STREET, LONDON. To AUGUSTUS DE MORGAN, ESQ., OK TR15ITY OOLLBGH, GAMBQIDGB, S-.B.A.S., F.C.P.B., &C. Dear Sir, Accept my grateful thanks for your having so promptly acceded to my request to be allowed again to place your name in the front of my work. But for the assistance derived from your writings the work would never have been undertaken ; and to that assistance mainly it owes whatever of utility it has been or may be found to possess. I am, Dear Sir, With much respect, Your obedient and obliged Servant, P. GRAY. EEEATA. Page 33, line 13 from bottom, for " six favour the occurrence of black," read " six favour the occurrence of white, three favour the occurrence of black." 40, 10 from top. The probability here assigned is mis-named. It really designates, (and is so referred to, p. 78,) the probability that the joint existence of (#) and (y) will be desolved in the nth year, an event which may arise by the decease in that year of either (x) or (y\ or both. 45, In the Elementary Table, log. (p^-l) should be '654119. 46, 24 from top, for log. (l+r), read % log. (l+r). 93, 11 from bottom, for '568989, read '586989. 110, 7 from top, for 1, 2, 6, 10, &c., read 1, 3, 6, 10, with the arithmetical complement of the former. The whole of these were first cut down to six places, to secure the requisite correspondence amongst the several values to be deduced from them. Then, since p x = l x+l -*-l x , /. log.^=log./, Hence also, colog.j9, c =log./, r +colog./, l . + 1 =ar. co. VH Again, Also, By these formulae the individual values were constructed ; and their differences being then taken, the table was completed.* A, fitting addition to the table would be the logarithms of l x l x+ i, with their differences, which would facilitate the operation suggested in (413). The methods explained and exemplified in this chapter, for the formation of the various combined series, by means of the differences of their component series, are newf; and it is believed, that by their * To ensure accuracy the table was constructed in duplicate, the author's coadjutor in the work being Mr. Henry Ambrose Smith. t Since they were matured the author has found that the principle they in- Xll PREFACE. employment the labour requisite for the construction of those series is reduced to an absolute minimum, while means are afforded of securing their perfect accuracy. Chapter V. treats of Mean Durations of Life, (Curtate and Com- plete,) and Probabilities of Survivorship ; and methods of computing these, by continuous processes, are explained and fully exemplified. Curtate mean durations have been frequently ere now formed continu- ously, and by the same formulae as are here employed, but applied by means of the common tables. So also have probabilities of survivor- ship, but by other and much less commodious formulae than the one here made use of.* The complete mean duration of one life is now for the first time computed continuously, by the aid of one of the newly tabulated series. In this chapter the typical method of indicating the manner of conducting the various operations is first employed. This method, when the principle of it is understood, will be found to afford all requisite facility for the end in view. If difficulty is felt, let the letters desig- nating the several lines in the type be placed against the corresponding lines in the operation typified ; then, remembering that the terms of the subsidiary series are supposed to have been at the outset inserted in their places, reference to the type will show how the blanks are to be filled up. Chapter VI. is occupied with the subject of Benefits on Lives; and the manner of forming continuously tables of the values of the prin- cipal of them is fully explained and exemplified. Independently of the application to this purpose of Tables I. and II., many of these benefits are now for the first time shewn to be susceptible of this mode of formation. This is effected by means of the Lemma in (193), which is a generalization of the famous formula assigning the value of an annuity upon (an) in terms of a like benefit upon (a?+ 1), by the aid of which most, if not all, of the existing tables of annuities have been formed. t The relation upon which this formula is founded is here volve was employed by Mr. Barrett in the construction of his joint life commu- tation Tables. See Baily's " Appendix," pp. 41, 42 ; or De Courcy's French Translation of the same, pp. 272, 273. But Mr. Barrett was obviously unaware of the power of the method he thus indicates. The only series to which he applies it is log. l x , and the purpose is to verify a series formed by another method. It is here applied to many series; and recourse to any other method is rendered unnecessary, except for the purpose of occasional verification. * For previous formulae see Morgan, pp. 185, 187; Baily, (French Transla- tion), pp. 95, 96; Milne, p. 73; Jones, pp. 151, 152. Mr. Jones's formula is an improvement upon Mr. Milne's, and the present is a farther improvement in the same direction. t This formula, as improved by Mr. Milne, (who was the first to tabulate log.^, by which its application is much facilitated,) will be found in (202) ; and its history is somewhat singular. Mr. Milne (Introduction, pp. xv, xvi,) informs PREFACE. Xlll shown to hold almost universally, and to be commensurate in its practical applications with the power of forming, from tabulated values for single lives, the requisite subsidiary series for joint lives. We do not stop to enumerate the cases to which, for the first time, the con- tinuous method of computation is here applied. These will be appa- rent to all acquainted with the subject. But we add a few remarks explanatory of the advantages gained by the application, in all such cases, of the appended tables, more especially of Table I. It will be noticed that the principal part of the operation by which we pass from each value to the next, is the formation of log.(l +x) from log.,3?, the latter logarithm being either the value last found, or the difference between that value and a given logarithm. To effect this by the common tables two entries are necessary ; first, an inverse entry, to determine the number x from its logarithm, and then a direct entry, to determine the logarithm of ! + <# from the corresponding number. By the new table a single entry suffices for the purpose in view, since the table in question enables us to pass at once from log.# to log.(l +#) Hence, when oc is a number which it does not concern us to know, a saving of one tabular entry for each value determined is effected by the employment of the new table. In the case of one, and only one, of the formations with which we have to do, namely, that of a uniform annuity, a? is a number which it may concern us to know ; so that if the values are wanted in num- bers, we have not in this case the advantage just claimed for the new table. But in all other cases we do not care to know what x is ; and therefore, whether the values be wanted in logarithms or in numbers, the saving of one entry for each value to be determined is effected by the employment of the new table. In the annuity operation, however, as in all the others, when the new table is used, we possess the power of stopping short with the formation of the logarithmic values, a power which, in the case in question, the employment of the common tables does not afford. us that^we are indebted for it to Thomas Simpson, who first published it in the year 1742; and that Euler, in apparent ignorance of what Mr. Simpson had done, afterwards gave it to the world as original in 1760. Subsequent writers have repeated Mr. Milne's account of the parentage of the formula, some of them however, as Mr. Galloway, (Treatise on Probability, p. 93,) attributing it entirely to Euler. But it has been recently shown by Mr. Farren, in the work cited in (384), that the originator of the formula in question was no other than the illustrious De Moivre, in the first edition of whose Treatise on Annuities, published in 1725, it is distinctly laid down and explained. The singularity of the case does not cease here. Useful, nay indispensable, as modern computers have found this formula, we search in vain in the third (the "last and best") edition of De Moivre's Treatise for anv trace of it ! XIV PKEFACE. Hence, universally, since the logarithms are nearly, if not quite, as useful as the numbers, we may consider that a saving equivalent to that of one tabular entry for each value determined, is effected by the use of the new table . But the advantage does not cease here. When the common tables are used, the different kinds of entries requisite direct and inverse are intermingled, whereby the operations are rendered exceedingly irksome and liable to error. This intermingling is entirely avoided by the use of the new table : entries of the same kind are brought together,* and there need be no inverse entries at all if the final taking out of the natural numbers be performed by means of Captain Shortrede's Anti-Logarithmic Table. Chapter VII. is occupied with the subject of Commutation Tables. The leading properties of these tables are laid down, and methods for their formation, for both single and joint lives,t are explained and exemplified, which it is believed will be found more certain and efficient than any heretofore proposed. The Postscript contains two additional methods, which suggested themselves since the chapter was completed. Chapter VIII. contains some details in reference to the history of the Commutation Method of computation ; and an attempt is made to vindicate Mr. Barrett's claim to the invention of that method, of which it has been recently sought to deprive him. We close with one or two general remarks. The Carlisle Table of Mortality, and 3 per cent, interest, have been probably more extensively employed as the bases of calculation than any other existing data, and a proportion ably greater number of results have been tabulated in connexion with them. The facility thereby afforded for comparison and verification of our results, has been a principal reason for the selection of the data in question as the basis of the examples in the following work. But, to guard against misconception, it is necessary to remark, that some of the values with which ours may come to be compared, have been found to be very incorrect. Thus, some of the mean durations given by Mr. Jones, in his Table XL., pp. 948, &c., are altogether different from those for the same ages formed here * Of the facility thus afforded an idea may be formed when the author men- tions, that he finds the formation of from 140 to 150 logarithmic annuity values in an hour to be a fair rate of working. This rate has been surpassed by Mr. Orchard, a friend of the author, who has had the tables in use for some time. Mr. O. finds that the formation of 200 such values in an hour is a rate of working that can be maintained. The operations in which a subtraction occurs occupy of course a little more time. By the operation in (255) 120 loga- rithmic survivorship assurance values have been formed in an hour. In all the cases mentioned the terms of the auxiliary series were previously inserted. t The illustrations apply to both Davies's and De Morgan's forms of the joint life tables. PREFACE. XV on p. 62. Mr. Jones's adjoining columns afford the means of deter- mining which set of values is the correct one. Again, Mr. Jones's Table XXII., pp. 538, &c., contains the values of assurances by the Carlisle rate of mortality, at eight different rates of interest ; and the result of an examination of the 3 per cent, column shows, that in the first half of that column the values err generally by about 3 or 4 in the fifth place, and in the remaining half usually by 1 or 2.* These are just such deviations as would arise from the employment of the incorrect three-decimal annuity values, (see ante, p. x.,) by which to deduce the assurance values.f In all cases of discrepancy, we appeal from Mr. Jones's results to his data. In Mr. Sang's very remarkable work the 3 per cent, assurances are also given. But as they are there, to reduce them to the moment of death, multiplied by the constant factor, Vl+r, his values cannot be directly compared with those formed in our examples, p. 93. In the note p. vii., the practicability of forming with facility, from the materials now accumulated, a seven-figure table of log.(l-f x), is mentioned. Such a table would no doubt be very useful, but from its great extent, (200,000 values,) it is not likely to be soon under- taken. A much more practicable undertaking would be an addition to the table here given of half its present extent, making it commence with argument 1 instead of 0. Such an extension would enable us to dispense with the double form of the types of operation, except for one or two values in the case of an annuity on three or more lives. Could the author venture to anticipate the necessity for a reprint of his work the extension in question should certainly be made. 37, BAKER STREET, LLOYD SQUARE, 2 1st February, 1849. * One value differs much more widely from the truth. Age 25, '36808 should be '36894. t A portion of Mr. Jones's column is copied, with all its imperfections, (and one more,) by Mr. Willich, in his Popular Tables," Longman and Co., 1846. Preparing for Publication, BY THE AUTHOR OF THE PRESENT WORK, IN CONJUNCTION WITH HENRY AMBROSE SMITH, F.I. A., AND WILLIAM ORCHARD, A. I. A., TABLES OF THE VALUES OF SURVIVORSHIP ASSURANCES; Showing the Single and the Annual Premium for an Assurance on (x] against (y), for every age of both (a?) and (y), according to the Carlisle Rate of Mortality, at 3 per cent. With an Introduction explanatory of the methods employed in the construction of the Tables, and the manner of their application to various important Problems ; and an Appendix of several Subsidiary Tables. CHAPTER I. OF THE TABLES. 1. IN most of the cases hereafter to be considered, one or other of the subjoined tables comes into use. To avoid interruption, there- fore, in treating those cases, it is expedient to commence with a description of the Tables, their principal properties, and the manner of using them. 2. All mathematical tables consist of two series of corresponding values, each value in either series having a value corresponding to it in the other. One of these series forms always an arithmetical pro- gression, having, to facilitate interpolation, 1, 10, 100, &c., as the case may be, for its common difference; while the other series forms a progression, varying usually according to other and less obvious laws. In reference to any table, then, we may, for present purposes, designate the two series of which it consists by the terms regular and irregular, respectively. 3. The manner in which the two series forming a table are arranged, so that the corresponding values shall oe readily ascertained, is familiar to all who are acquainted with the standard tables of Hutton, Babbage, &c. And as none others will seek to use the subjoined tables, which are arranged in the same form as the tables in question, it is unnecessary to be more particular on this point. 4. The number with which a table is entered, as the phrase is, that is, which is sought in one of the series of which the table is composed, and the number corresponding to which is to be taken out from the other series, is called the argument ; and the number so taken out is called the tabular result* corresponding to that argument. 5. When the argument is sought in the regular series, and the result consequently taken out from the other series, the table is said to be used directly ; and, conversely, when the argument is sought in * This very commodious term was first proposed by Professor De Morgan in his valuable and interesting article, "TABLE," in the "Penny Cyclopaedia," and a continuation of which will be found in the " Supplement " to the same work. the irregular series, and the result taken out from the regular series, the table is said to be used inversely. 6. For the more convenient application of logarithmic functional tables, to which class the tables subjoined belong, it is desirable to possess a means of commodiously denoting their results, when used either directly or inversely. For this purpose the following notation is proposed : Let a result, arising from the direct use of a table, be denoted by the letter T, with the argument appended, in brackets ; and let a result arising from the inverse use of a table, be denoted by the inverse symbol T" 1 , also with the argument appended. Thus, if the given argument for any table be log. m ; then the corresponding tabular result will be denoted by T [log. m] if the table is to be used directly, and by T -1 [log. m\ if the table is to be used inversely. 7. These symbols being quite general, they may be employed to characterize the results of any table whatsoever ; and hence the functions they will represent in any particular case, will depend altogether on the nature of the table in connexion with which they are used. We now inquire, therefore, what are the functions represented by the foregoing symbols, when used in connexion with the subjoined tables. A slight extension of the notation proposed is desirable, before proceeding farther. The tables are two in number, and it will be convenient to possess the means of distinguishing the results of the one from those of the other. This end will be attained very commodiously by employing, in connection with the symbols T and T" 1 , the suffixes 1, and 2, thus T } , T 2 ; T^ 1 , T^ 1 , according as the results indicated are those of the first or of the second table. We have then four cases to consider, namely, T x [log. m\, the result of the direct use of Table I.; Tj- 1 [log. w], inverse I. ; T 2 [log. m], direct II. r ; and T 2 -1 [log. m], inverse II. 8. The two series composing Table I., are headed respectively, " Log. x," and " Log. (1 -f x) ;" the former being what we have hitherto called the regular series, and the latter the irregular series. The meaning of this is, that any term in the first series being considered as the logarithm of some value of x, (what that value of x is, we do not need to know,) the corresponding term in the second series will be the logarithm of the same value of x, increased by unity. For example, corresponding to log. a? = 0*245400, we find log. (1+ x) = 0-440837. The former logarithm happens to be the logarithm of 1- 75954, and the latter is consequently the logarithm of 1 + 1-75954, or 2-75954. Hence we assign the interpretation of the first symbol ; which is, making log. m the log. x of the table, T^log.roJ^log. (l+m). 9. Corresponding values in Table I., being log. x, and log. (!+<#), let for a moment \ + x~y } then is x=y 1, and the corresponding values may be written log. (y 1) and log. y. Let our log. m= log. y, and we shall have for the interpretation of the second symbol, Tj-ipog. w]=log. (m-1). 10. The two series composing Table II., are headed, respectively, " Log. x" and "Log. (\x}"; which means that, any term in the first series being considered as the logarithm of some value of x, the corresponding term in the other series will be the logarithm of unity diminished by that value of x. Thus, corresponding values are 1-520200 and T'825242 : the former of these will be found to be the logarithm of 0-331284, and the latter of 0-668716, which is 1-0-331284. Hence, if our log. m be made the log. x of this table, we shall have T 2 [log. m] =log. (1-m). 11. Let, as in (9), 1 x=y ; then is x = \ y, and corresponding values in Table II. may be written log. (1 y} and log. y. Hence, if our log. m=log. y, we shall have for the interpretation of the fourth symbol, T 2 -i[log.ro]=log. (l-m). From this it appears, as might indeed have been inferred without the formality of demonstration, that the series composing Table II., are reciprocally related. The tabular result is the same function of the argument in whichever way the table is used. Hence, if the two series were co-extensive, we need never employ this table inversely. This is not the case, however ; the series log. (1 x} extends consider- ably beyond the other in one direction. The inverse use of this table may therefore sometimes be necessary. 12. It remains to say something on the subject of interpolation for values intermediate to those contained in the tables. We take the tables separately, as the processes are different. In Table I. the proportional parts are arranged in an unusual if not an unprecedented form. x\s ordinarily arranged, the proportional parts corresponding to each tabular difference consist of tenths, from one- tenth up to nine-tenths of that difference ; and when two figures have to be proportioned for, two entries of the table of proportional parts are requisite. Here the proportional parts of each tabular difference consist of hundredths, from one-hundredth up to ninety-nine hun- dredths, made true to the nearest unit in the last place. In the use of this table, consequently, with an argument of either five or six figures, one entry of the table of proportional parts is always sufficient. With this single variation the direct and inverse modes of using Table I. correspond with the like modes of using the common tables of loga- rithms, with which all are familiar. 13. In Table II. the proportional parts are arranged in the usual way. So far, therefore, it corresponds, as to the modes of using it, with the like modes of using the common tables. But if, as in using the common tables, the results corresponding to the tabular value next lower than the given argument, be taken out, the proportional parts will be subtractive ; because, of the two series composing the table, an increase in the one corresponds to a decrease in the other. This in- convenience, however, is remedied, as in the case of the complemental functions in the trigonometrical tables, by taking out the result corre- sponding to the tabular argument next higher than the given argu- ment, and adding to it the proportional parts for the excess of the tabular argument over the given argument. The foregoing remarks, and precepts for the use of the tables, will find abundant illustration in the examples which will presently be given. 14. We now proceed to the general problems which may be solved by means of the tables. PROBLEM I. The logarithms of two numbers are given : it is required to find the logarithm of their sum. Let a and b be the two numbers, of which a is the greater. Log. a and log. b are given, and it is required thence to determine log. (a +b). Converting into logarithms the identical equation, we have, log. (a -f b) = log. b -f log. (T + 1 Y But, by (8), log. g+ l^flog.y ^[log. a-log. b] ; whence, log. (a -f b) = log. b + T x [log. a log. b] . We have, therefore, the following Rule : Subtract the less of the two given logarithms from the greater, and CI/YW^ enter Table I. directly with the difference. The tabular result added to the less logarithm will give the logarithm required. 15. Here we may remark, that, the argument being log. a log. 6, or log. (a-r-6), the table will apply, for the solution of this problem, to any two numbers, however large or however small those numbers individually may be, provided their ratio does not exceed that of 100 to 1 ; since 2, which is the logarithm of 100, is the greatest tabular argument for the direct use of the table. 16. EXAMPLE 1. Given log. a = 1-543268, and log. 6=0-467568; required log. (a + 6) . log. = 1-543268 log. 6=0-467568 1-075 7,00= log. a-log b. ^[1-0757]= 1-1 10731 log. (a + b) = 1-578299 The working here hardly needs explanation. The difference between log. a and log. b is set down at one side, that it may not interfere with the subsequent addition of the latter logarithm to the tabular result. The line between log. a and log. b is to give farther facility by separating the latter logarithm, which has to be included in the addition, from the former. Ex. 2. Given log. a = l'623482, and log. 6 = 1-338253 ; required log. (a + 6). log. a = 1-623482 log. 6 = 1-338253 0-2852,29= log. a-log. 6. ^[0-2852]= 0-466632 pro. parts for 29= 19 log. (a -f 6) =1-804904 In this example the proportional parts come into use. The tabular difference is 66 ; and in the column of proportional parts headed 66, opposite 29, we find the pro. parts corresponding, namely, 19. Ex. 3. Given log. = 1-806180, and log. 6=1-556303 ; required log. (a +6). log. a = l-806180 log. 6 = 1-556303 0-2498,77 =log. a-log. 6. Tj [0-2498] =0-443648 p. p. for 77= 49 log. (a -f6) =2-000000 In this example the given logarithms are those of 64 and 36. The sum of these numbers is 100, whose logarithm is 2, as found above. Ex. 4. Given log. a =0-362415, and log. 6=1-276342 ; required log. (a + b). log. 0=0-362415 log. 6=1-276342 1-0860,73= log. a-log. b. Tj [1-0860]= 1-120241 p. p. for 73= 68 log. (0 + b) =0-396651 Ex. 5. The logarithms of two numbers are 1*243689, and 2-683426; find the logarithm _of their sum. 1-243689 2-683426 0-5602,63 T! [0-5602] =0-665811 p. p. for 63= 49 log. required = 1-349286 Ex. 6. The logarithms of two numbers are 4-328653, and 2-437248; required the logarithm of their sum. 4-328653 2-437248 1-8914,05 Tj [1-8914] =1-896941 p. p. for 05= 5 log. required = 4-334194 17. Occasionally, in practice, it is not convenient to arrange the logarithms to be operated upon in the manner here exhibited, namely, the less under the greater. The greater will sometimes stand under the less, when it would be exceedingly inconvenient to proceed in the way directed. In this case, therefore, the operation may be modified in the manner following : Subtract the greater logarithm from the less, and set the difference under the greater. Make the arithmetical complement of the difference the tabular argument, and set the result under the difference. Addition of the three lines will give the logarithm required. For since a-f b = a(l +-J = a - (r + 1 ), we have, on passing to logarithms, lo. + = log. a + lo. - . . . =log. a + (log. b log. aJ+Tj^og. a log. I the last term, TJlog. a log. ti], being the same as T^O-aog. i-log. a)], or T^colog. j], We repeat the last example, worked as here directed : less log. =2-437248 greater log. = 4-328653 diff. =2-108595 1-8914,05 =ar. co. diff. T l [1-8914] = 1-896941 p. p.= 5 log. required =4-334194 This form of the operation requires a line more than the other, and we cannot make provision for this additional line, since it is impossible to know beforehand the cases in which the necessity for it will occur. This inconvenience will be obviated by adding the proportional parts to the tabular result before setting it down. 18. COROLLARY 1. If the less of the two quantities, the logarithm of whose sum is to be found, be unity ; then, by substituting in the general expression in (14), 1 for b, and for log. b, we have, in this case, log. (fl+l)=T 1 [log. a]. This is a symbolical representation of the fundamental property of the table, with which we set out (8). We give a few examples of its application. 19. Ex. 1. Log. a = 1-637400; required log. (a + 1). T! [1-6374] =1-647295 =log. (a + 1). Ex. 2. Log. a = l -995635; required log. (a+1). ^[1-9956]= 1-999965 p. p. for 35 = 35 log. (a+1) =2-000000 The given logarithm here is that of 99. The required logarithm, consequently, is the logarithm of 100, which is 2, as just found. Ex. 3. The logarithm of 1 is ; it is required thence, by means of the table, to determine the logarithms of the natural numbers up to 20. 8 The operation is in the margin ; and as it may be regarded as a type of the continuous opera- tions in which the power and utility of the table are chiefly exhibited, it may be proper to offer a few remarks upon it. (1.) The principle of the operation is obvious. Each logarithm, as it is found, is made the argu- ment for finding the next. The logarithms of the natural numbers up to 100 might be found in this way, but no farther, as log. 100 is just beyond the greater limit of the table. (2.) When the last two places of the argument are ciphers, a line is still left for the proportional parts, for uniformity, and because it is convenient in these operations to use paper previously ruled. (3.) In continuous operations, such as the pre- sent, the indices of the logarithms need never be set down. It is something to save the writing of one figure out of seven, if the omission give rise to no obscurity. And this it cannot do, since, the index of the initial value being known, and the values increasing gradually, an addition of unity to the index is always marked by a large decrease in the mantissa; as here, in passing from log. 9 to log. 10. (4.) The result of every tabular conversion, when interpolation is used, and the tabulated values, as in all logarithmic tables, are only ap- proximately and not absolutely true, is subject to some degree of uncertainty. From a careful con- sideration of the causes of this uncertainty, in connexion with the present table, it appears that its results, in detached operations, will be occa- sionally affected by an error of a unit (not more) in the last place; and this either in excess or defect, both kinds of error being about equally probable. In a number of such operations, con- sequently, the errors of the one affection will log. i* [0-0000] Tjp-3010] p.p. for 30 T^O-4771] p. p. for 21 000000 301030 00 log. 2 301030 477101 20 log. 3 477121 602044 16 log. 4 602060 698922 48 5 698970 778093 58 6 778151 845054 44 7 845098 903004 86 8 903090 954163 79 9 954242 999962 '3S 10 000000 041393 00 11 041393 079096 86 12 079182 * In this and succeeding examples the natural and the logarithmic numbers are distinguished from each other by being printed in different forms of type. The old type, now again coming into extensive use, is employed for the natural numbers, and the modern type, of uniform size, for the logarithms. about equal those of the other, so that the average may be regarded as correct. And hence, also, when the operations are dependent, as in the example before us, errors of the one kind will probably be compensated by those of the other, and the total de.viation will, in general, be ex- ceedingly small, certainly quite undeserving of attention in practice. To illustrate this, compare the logarithms found in this example with the logarithms, to six places, of the same numbers as given in the standard tables, and it will be found that, up to log.8, inclusive, they are correct. In log.9 there is a deviation of 1, which is neutralized at the next step, and logs. 10 and 11 are correct. Logs.12 to 15, inclusive, err by + 1, and logs. 16 to 20 are correct.* 20. COROLLARY 2. If the greater of the two quantities, the logarithm of whose sum is to be found, be unity, then, by substituting in the ex- pression for log. (a+ b) in (14), 1 for a, and for log.a, we have, 12 079182 113868 76 i 4 146129 15 176092 204034 86 i6 204120 230430 19 17 230449 1 8 255273 278685 69 19 278754 300979 51 20 301030 [colog.6], where colog.6 denotes the arithmetical comple- ment of log.6. 21. This case is to be distinguished from that of Corollary 1. There the number whose log- arithm was to be found was, 1 plus a number greater than unity ; here, the number whose logarithm is required is, 1 plus a number less than unity. Between the two cases the table affords a wide range within which the number whereof, when increased by unity, the logarithm is required, may be situated. For 2, the limit of the tabular argument in this application of the table, being the logarithm of 100, and the co-logarithm of -01, the number may have any value within these limits. * If it be objected that this is a clumsy way of finding the logarithms of the natural numbers, it is at once admitted that it is so. The example has been chosen solely on account of the facility afforded by existing tables for verifying the results of this table ; and the operation would have been, practically, just the same, had the numbers corresponding to the logarithms found consisted of six places instead of one or two only. In the latter case the example could not hav'e been worked by any existing table so easily as by this. C 10 22. It may be well here to give the rules for the two cases, although that for the first case has been anticipated. A logarithm being given, and it is required to find the logarithm of the corresponding natural number, increased by unity : CASE 1. When the given logarithm is positive, and its number consequently not less than unity, enter Table I. directly with the given logarithm, and the tabular result will be the logarithm required. CASE 2. When the given logarithm is negative, and its corre- sponding number consequently less than unity, enter Table I. directly with the arithmetical complement of that logarithm, and add the tabular result to the given logarithm ; the sum will be the logarithm required. 23. The following are a few examples illustrative of the second case. Ex. 1. Log. = 2-326341; required log. (1 +b). log.6 = 2-326341 1 -6736,59 = colog.d T^l-6736^1-682712 p. p. for 59= 58 log.(l + b) =0-009111 Ex. 2. The logarithm of a certain number is 1-698970 ; required the logarithm of that number increased by unity. T-698970 0-3010,30 T^O-3010] =0-477101 p.p. for 30= 20 log. required=0-176091 Here the given logarithm is log.5, and the result is log.1-5. 24. We now pass on to PROBLEM II. The logarithms of two numbers being given, it is required to find the logarithm of the difference of those numbers. Let, as before, a and b be the two numbers, of which a is the greater. Hence, log. and log. being given, it is required to find log. (a b). (1.) From the identical equation, we have, on passing to logarithms, 11 Now, by (9), consequently, log.(a-^)=lo Hence we have the following RULE : To find the logarithm of the difference of two numbers whose logarithms are given: Subtract the less logarithm from the greater, and enter Table I. inversely with the difference. Add the tabular result to the less logarithm, and the sum will be the logarithm required. (2.) The relative magnitudes of a and b remaining, a b may be also written thus : which, on passing to logarithms, gives, log. (a-b)= log.a + log|l - -). But, by (10), Whence, log.( b] =log.a + T 2 [log. log.a]. RULE : Subtract the greater logarithm from the less, and enter Table II. directly with the difference. Add the tabular result to the greater logarithm, and the sum will be the logarithm required. (3.) By (11), log.(l -J)=T 2 -'[log. j] =T 2 -> pog.6-log.a]. Whence also, log.(a ^)=log.fl4-T 2 ~ 1 [log.6 log.0]. The rule here is the same as that last given, with the single change of the word directly into inversely. (11.) 25. We have thus three modes of solution of Problem II. ; but all are not applicable throughout the same limits. That is to say, in many of the cases that arise in practice, some one or more of the methods may not admit of being applied, in consequence of the argu- ment being beyond the limits of the series in which, in the use of those methods, it has to be sought. The second method applies to all the cases to which the first applies, and also to some in which the third applies ; and it is generally to be preferred, as being at least as correct as the others, and also somewhat easier. The results of the third method, where it alone is applicable, namely, towards the com- mencement of the table, where the ratio of a to b approaches a ratio 12 of equality, must be used with caution. The deviation from the truth, in the results arising from the inverse use of that part of the table, will often be very considerable. 26. We now give some examples, illustrative of the application of these different methods of solution. Ex. 1. Given log.a = 5 -994605, and log. = 4-011274; required log.a b). log.a = 5-9946051 log. a log. log.6=4-011274| 1-983331 [1-983237] = 1-978700 237 p. p. for 94= 95 y^ -fl =5-990069 log.6= 4-01 1274 _log.a = 5-994605 T 2 [2-01 7] =1-995460 p. p. for 33= 3 log. (a -) =5-990068 log. b log. or 2-016,669 - 331 In this example the given logarithms are those of 987654, and 10263. The logarithm required, therefore, is that of 987654 10263 =977391, which is 5-990068. 27. A few words of explanation may be useful. In the first solu tion Table I. is entered inversely with log.a log. = 1-983331, and 1*978700, the result corresponding to the next lower tabular value, namely, 1*983237, is taken out. The excess of the argument over the tabular value used, namely 94, is then sought in the Table of Proportional Parts, in the column headed 29, which is the tabular difference at the point of the table in use, and opposite is found 95, the pro. parts corresponding. The sum of the three lines then gives the logarithm required. 28. In the second solution Table II. is entered directly, with argument log.b log.a, namely 2*016669, and, agreeably to (13), that the pro. parts may be additive, the result corresponding to the next higher tabular value, namely, 2'017, is taken out. We have now to proportion for the excess of 2'017,000 over 2*016,669, and this, it is easy to see, is the same thing as the excess of 1000, the constant difference in the argument series, over 669, the last three figures of the given argument. The property here taken advantage of may be thus simply demonstrated. If t denote any value in the argument series, and d the constant difference in that series, the value next higher than t will be denoted by t + d. Any value, consequently, in- termediate to t and t+ d, will be denoted by t-\-e, where e is less than d. Hence the excess of the greater tabular value over the interme- diate value is plainly (t+ d) (t-\-e)=de. In the first four pages of Table II. d is 1000, and e, consequently, the number composed of 13 the last three figures of the given argument. In the remainder of the table d is 100, and e } therefore, the number composed of the last two figures of the given argument. The complement of these figures, therefore, to the constant difference may always be at once set down without the formality of a regular subtraction. The last figure of the complement, in this portion of the table, does not affect the pro. parts, and no farther account need be taken of it than, when it is not less than 5, increasing the next figure by unity. 29. Ex. 2. Given log. = 1-999996, and log.b = 1 -045753 ; re- quired log.( b). log.b = 1-045753 log. = 1-999996 log.a log.ZO 0.954243 > 163 80 log.fl = 1-045 753 [0-954163] =0-9030 p. p. for 80= 91 log. (a -b) = 1-948844 log. = 1-999996 1-0457,57 T 2 [1-0458] =1-948842 p. p. for 43= 5 43 1-948843 Here a=99999, and = 11-111; hence - = 88-888, whose logarithm is 1-948843. Ex. 3. Log.a =1-823908, and log. = 1-346787; required log. (a-*). log. = l-823< j.A = 1-34678710.477121 101 [0-477101] =0-3010 p.p. for 20= 30 log.(a-) =1-647817 log.A = 1-346787 log.a = 1-823908 1-5228,79 T 2 [1-5229] =1-823898 p. p. for 21 = 11 21 log.=I-346787 log.a = 1-823908 s - 1 [f-522896] =1-8239 p. p. for 17= 8 1-522879 96 17 log.(- b) = 1-647816 Here the three methods of solution apply. The values of a and b are -666666 and -222222. Hence b = '444444, the logarithm of which is 1-647817. 14 Ex. 4. Log.a= 1-64781 7, and log.6 = 1-522878; required log. (a-b). . = 1-522878 log.a = 1-64781 7 T 2 [1-8751] =1-397824 p. p. for 39= 117 .a-d =1-045758 1-875061 39 log. = 1-522878 log.a = T64781 7 1 -875061 T 2 - 1 [l-875075[ = l-3979 p. p. for 14= 43 14 log. (a-*) = 1-045760 Here only the second and third methods apply. The values of a and b are -444444 and -333333 ; a-b therefore is -111111, and its logarithm is 1-045758. Ex. 5. Log.a = 1-753327, and log. A = 1 -744727 ; required log. (a-*). lo.& = 1-744727 log.a=JL- 753327 1-991400 1 [1-991408] =2-292 08 p. p. for 8= 400 8 log.(a-)=0-045727 In this example the third method alone applies. = 56-6666, and 6 = 55-5555 j hence a 6 = 1-1111, the logarithm of which is 0-045753. There is, therefore, here considerable deviation from the truth, in ac- cordance with what was stated in (25). The uncertainty in such cases does not arise from error in the table ; but is a necessary consequence of the relation subsisting between numbers and their logarithms, as might easily be shewn did space permit. The common tables applied to similar cases will give results in no respect more satisfactory. It is but seldom, in practice, that occasions arise in which the inverse use of our second table is requisite. 30. COROLLARY 1. If the less of the two numbers, the logarithm of whose difference is required, be equal to unity, we have, by substi- tuting in the general expressions in (24), 1 for b, and for log. 6, log.(-l) = T r i[log.] (1); log.(fl-l)=log.a + T 2 [colog.a] .... (2); log.(a-l)=log.fl + Tj-^colog.a] . .(3). We have here, as before, three solutions. We confine ourselves in our examples to the first and second, and chiefly to the latter, 15 for the reasons already stated (25). It is unnecessary to give rules in words. 31. Ex.1. Given log.0 = 1-890855: required log. (a 1) log.a = 1-890855 T 1 - 1 [l-890820]= 1-885200 p.p. for 35 = 35 log.(a-l) = 1-885235 _log.a = 1-890855 2-110 T 2 [2-110] = 1-994369 p.p. for 86= 11 log.(fl-l) =1-885235 Here a = 77'7777 ; hence a 1 = 76-7777, whose logarithm is 1-885235. 32. The operation by Table I. needs no explanation. In that by Table II., the argument is the arithmetical complement of log. a, namely, 2'] 09145. The next higher tabular argument is 2*110, the result corresponding to which being taken out we should have to add to it the proportional parts corresponding to 1000 145 (28). But this is 855, the last figures of the given argument. We therefore save labour by forming the complement of only the first three or four figures of the given argument, (according to the part of the table in use,) and proportioning for the remaining figures. 33. Ex. 2. The logarithm of a certain number is 1-698970; required the logarithm of that number diminished by unity. log. = 1-698970 T 1 - 1 [l'698876] = 1-690100 p.p. for 94 = log.(fl-l) =1-690195 _ log.fl =1_-698970 2-302 T 2 [2-302] = T-991206 p.p. for 97= 20 log.(fl-l)= 1-690196 Here a being 50, a I is 49, the logarithm of which is 1-690196. Ex. 3. The logarithm of a certain number is 0-698970 ; find the logarithm of that number diminished by unity. Given log. =0-698970 T 1 ~ 1 [0-698922] =0-602000 p. p. for 48 = 60 log. required =0-602060 Given log. =0-698970 1-3011 T a [l-3011] =1-903072 p. p. for 70= 18 log. required = 0-602060 Here the given logarithm is that of 5, and the required logarithm consequently is log.4 = 0-602060. 16 34. Ex. 4. The logarithm of 100 is 2; determine the logarithms of 99, 98, 97, &c. The operation, by Table II., is in the margin.* Each value is deduced from that last found. In the values from 97 to 90, inclusive, there is a deviation of 1 in the last place ; but 89 is correct. Ex. 5. The logarithm of 10 is 1 ; find thence the logarithms of 9, 8, 7, &c. The operation is on this and the next page, and all the values are correct. This operation differs from that in the last ex- ample by calling into requisition a part of the table in which the argument is given to four places. 35. COROLLARY 2. If the greater of the two numbers whose logarithms are given, be equal to unity, on substituting in the expressions in (24), 1 for a, and for log. a, we have log.(l-4)=log.6+T 1 -i[colog.6] .. (1); log.(l-i)=T 2 [log.i] (2); log.(l-fi)=T 2 -'[log.S] (3). We give two examples of the application of the second formula. Ex. 1. The logarithm of a number is 1-647817; required the logarithm of the excess of unity over that number. Given log. = 1-6478,17 83 .... (28) it is required thence to T 2 [l-6479] =1-744661 p. p. for 83 = log. ioo T 2 [2-000] log. 99 T 2 [2-005] p. p. for 64 98 T 2 [2-009] p. p. for 23 97 96 95 94 93 92 90 2-000000 1-995635 00 J-995635 1-995584 7 J-991226 1-995543 2 986771 995491 8 9822/0 995450 3 977723 995397 7 973217 995354 1 968482 995300 5 963787 995245 2-000 005 009 014 018 023 027 032 037 959040 041 995201 1 954242 046 995145 3 89 949390 66 log. required = 1-74472 7 Jog. 10 !_ -000000 1-0000 T 2 [l-0000] 1-954243 00 Here the given logarithm is that of log p -954243 0458 444444. The required logarithm, con- T 2 [l-0458] 948842 sequently, is that of -555556, which is P- P- for 43 ^ 1-744728. log. 8 903090 0970 * See the remarks and note on the similar operation in (18). 8 T 2 [l-0970] p. p. for 90 903090 941995 13 845098 933037 16 778151 920809 10 17 0970 Ex. 2. Required the logarithm of (1 log.- 1 2-464284).* 698970 903072 18 1550 2219 3011 2-464284 716 T 2 [2-465 = 1-987141 p. p. for 72= 22 required log. =1-987163 3980 The given logarithm here is that of 1 v, (v = 1 1 -03) ; and the logarithm found is, consequently, that of v = -970874. 36. For convenience of after reference, 5229 the formulae we have deduced are here sub- joined in a tabular form. In the formula in which b alone appears, it is, for sym- metry, replaced by a. The formulae will hereafter be referred to by the Roman numerals. The Arabic numerals in the last column denote the paragraphs in which the formulas are deduced or illustrated. Of the formulae those desig- nated by the odd numbers, I., III., V., &c., will be most frequently employed. 602060 875041 20 477121 823898 11 301030 698940 30 000000 6990 a 7 b 7l log.fl-f T 2 pog.6-log.fl] ;. log.fl] TI H .a + T 2 - 1 [colog.ff] ---- T 2 [log.a] I. II. III. IV. V. VI. VII. VIII. IX. X. XL XII. * Log. -1 a means the number whose logarithm is a. CHAPTER II. OF INTEREST. PROBLEM III. 37. To construct a table of the amount of 1., in every number of years, from one to one hundred. Let the interest of 1. in one year be denoted by r. Then will r be one-hundredth of the rate per cent. ; so that, according as this rate is 3, 3i, 4, 5, &c., per cent., the value of r will be -03/035/04/05, &c., respectively. One pound, by the operation of interest, increases in one year to 1 -\-r pounds. And since any other sum will, in the same time, increase in the same ratio, namely, that of 1 to 1 + r, 1 -fr will in a year become (1 -f r)' 2 ; (1 +r) 2 will in a year become (1 + r) 3 ; (1 +r) 3 will in a year become (1 + r) 4 , and so on. Hence I-i-r is the amount of 1. in one year, (1 + r) 2 by inspection in Button's Table of the logarithms of 9 1155350 75 numbers from 1 to 1000 to 20 places. When the I0 12 83723 00 rate is fractional, 1 + r will overpass the limits of this table ; but it may generally be separated into factors, the logarithms of which are contained in the table ; and by the addition of the logarithms of those factors, the required logarithm will be obtained. If these means fail recourse may be had to those indicated in the note, p. 19. PROBLEM V. 47. To construct a table of the present value of one pound, to be received at the end of every number of years from one to one hundred. 48. The present value of a sum whose period of payment is other * It must be remarked, in regard to this particular example, that it belongs to what may be called the critical case. The last two figures of log.(l-|-r), as written, are 25, just half the least quantity, the cutting off of which occasions an increase of a unit in the preceding figure. Hence, if 25 be greater than the true value of the last two figures of log.(l-fr), the indication of increase in the 2nd, 6th, 10th, &c., multiples will be fallacious. This is actually the case here. The real value of the figures written 25 is only 24' 7 ; and this value must be used, that is, we must here employ log.(l-j-r) to 10 places, if strict accuracy be required. 22 than the present time, whether past or future, is that sum whose pay- ment now is equivalent to the payment of the given sum at the speci- fied time. Hence, since by Problem III., (l + r) M denotes the present value of 1. paid (or received) n years ago, the present value of 1. to be paid (or received) n years hence, will, by the laws of algebraical interpretation and extension, be denoted by (l-\-r)~ n , or ln-(l-f /*)". Otherwise, since 1. amounts in n years to (l+r) n pounds, 1. is the present value of (l-\-r) n pounds to be received n years hence; from which we find, by proportion, that the present value of 1. to be received n years hence is l-r-(l -\-r} n , as before. 49. It thus appears, that the present value of a sum due at an after period, is that sum which, invested now, and improved during the interval, will, at the period of payment, just amount to the sum due. 50. It is usual to denote !-=-(! + r) by v. Hence, making n = 1, 2, 3, ... n, successively, v, v 2 , v*, . . . v n , will denote the present value of 1. to be received at the end of 1, 2, 3 > . . . n years re- spectively. The table proposed for construction, therefore, will consist of the first hundred integer powers of the quantity v, obtained by dividing unity by 1 -f-r ; and the several terms will be the reciprocals of the corresponding terms in the table of the amount of 1 . Three modes of construction present themselves. The first is, by the continual multiplication of v by itself; the second is, by the continual division of v by 1 + r ; and the third is, commencing with the last term, to compute backwards, by the continual multiplication of that term by 1 +r. Having already seen the facility with which multiplication by 1 -f r can be effected, there can be no doubt that the third of these methods is that which ought to be preferred. 51. The operation may be conducted in the manner following : The last term, v 100 , being the reciprocal of (1 -fr) 100 , will be determined either by logarithms, or by actual division. Multiply this term con- tinually by (1 + r) 10 , and the results will be v 90 , v 80 , v? , and so on, down to v, or 1. Now, multiply v wo continually by 1+r, in the manner of Problem III., and the results will be the values required, a verification being had at every 10th value, by means of the values previously found. 52. The operation for the last ten terms of this The p T^i. value table, (or the first ten terms as they will ultimately 10 7440939149 be arranged,) when the rate of interest is 3 per cent., is in the margin. The 10th term, that is v 10 , 9 7664167323 has been found by logarithms, and the succeeding values are found by continually multiplying by 1*03. 8 7894092343 23 7894092343 236822770 8130915113 243927453 8374842566 251245277 8626087843 258782635 8884870478 266546114 9151416592 274542498 942595909 282778773 9708737863 291262136 9999999999 The value of v should be unity. There is, there- fore, in our operation a deviation of a unit in the 10th place. PROBLEM VI. 53. To construct a table of the logarithms of the present value of 1., to be received at the end of every number of years, from one to one hundred. The series of logarithms here to be formed, are the logarithms of the numbers in the table whose con- struction was last shown. Being the logarithms of v, v* 1 , v 3 v 100 , they will be the first 100 integer multiples of log.v, (42) ; and the table may be formed in the same way as the table described in Problem IV. 54. The formation of the first ten values, when the rate is 3 per cent., is here given. The logarithm of v is the arithmetical complement of log.(l+r) ; and it has been increased in the 8th place by 5, that the 7th place may be correct throughout (45). The index, so far as we have g one in the computation, is 1. But it need not be set down, as the point at which a change takes place is easily seen. 55. Take, as a second example, the formation of the first ten values when the rate is 4 per cent. On comparing the 9th and 10th values here found with the corresponding values in Mr. Jones's work, p. 104, they will be seen to differ by a unit; and if the table be completed the difference in the latter values will be no less than 6 in the 7th place. This seems to have arisen from the log.v used in the computation, of Mr. Jones's table, having been taken as 982966667, instead of 982966661 a likely enough error, since the true logarithm to 10 places is 9829666607. There are discrepancies also in the 3 per cent, column, but they do not amount to so much as in the case adduced.* PROBLEM VII. 56. To construct a table of the amount of an annuity of l. in every number of years, from one to one hundred. * Mr. Jones's table is understood to have been copied from an uncompleted work on Assurances, by Mr. Griffith Davies, to which there will be occasion hereafter to refer. Logarithm of the present value of 1. 1 9871628 25 2 9743256 00 3 961488375 4 9486511 50 5 9358139 25 6 922976700 7 9101394 75 8 897302250 8844650 25 8716278 00 9 10 Logarithm of the present value of 1. 9 10 9829667 11 9659333 72 9489000 33 9318666 94 9148333 55 8978000 16 8807666 77 8637333 38 8466999 99 8296666 60 24 57. By the amount of an annuity in n years is meant the aggregate amount, at the instant the nth payment is made, of all the payments, supposing each to have been improved at interest from the time of its becoming due. Now, the first payment having been made n 1 years ago, the second n 2 years ago, and so on, the amounts of these pay- ments will be (37), of the first, (1 -f r) n ~ l , of the second, (1 +r) w ~ 2 , of the third, (l-fr) tt ~ 3 , and so on to the nth, which, having just been made, its amount will be 1. Hence, taking the payments in reverse order, the amount of the annuity will be, Amount of an Annuity ofl. Consequently, whatever whole number be denoted by n, the sum of n terms of the foregoing series will be the amount of an annuity of 1. for n years. But the terms of the series, after the first term, are the values in the table of the amount of 1. Hence, when a table of the amount of 1. has been previously formed, a table of the amount of an annuity of 1. may be readily constructed. 58. The formation of the first ten terms of this table (rate 3 per cent.) is here given. Unity, which is the amount for one year, is first set down, and on the next and alternate following lines the successive values in the table of the amount of jl. Continual addition of these gives, in succession, the required amounts for 2 years, 3 years, &c. 59. This method requires a table of the amount ofl. to have been previously calculated. When this has not been done, the mode of proceeding will be different. Denote by A( n _ 1 ) the amount of an an- nuity for n 1 years, and by A (w) the amount of an annuity for n years. Now the amount of the latter annuity manifestly consists of the amount of an an- nuity for n 1 years improved for one year, and increased by (68). Hence, 28286113545 8884870478 37170984023 8626087843 8374842566 6 54171914432 29 By this formula, commencing with the value for one year, the table might be constructed. But a multi- plication by v for each value is involved, to avoid the labour of which the formula is subjected to a slight transformation. Dividing both sides of the equation by v, we have, } , or, (50), (1 + r)( n ) = 1 -f a (li _ l} ; whence, a (n _ l} = (1 + r) a (n} - 1 . 70. We give a re-calculation, by this formula, of the terms already found. They are here deduced in reverse order, and, in practice, a commencement would be made at the 100th term, which would be found, by the application of logarithms to the for- mula of verification, to be immediately given. Here a commencement is made at the 10th term, and the values to the first are found in succession. The operation is to multiply continually by 1*03 (38), abating a unit from the integer part at each addition. 71. Comparison of this operation with the last shows that the mixed quantity, here added at each operation, is equivalent to the subtraction of a power of v ; that, in fact, the subtraction from unity of the several positive addends, will give the successive powers of v. Here, therefore, in strict analogy with what was observed in (60), previous construction of a table of the powers of v is seen to be superfluous, as they may be readily deduced from the materials of this equally simple operation. 72. A formula of verification is deduced as follows a (n )=v+v 2 + v 3 + . . . . + v n , summing this geometrical series in the usual way, we have l-v n 8130915113 7 62302829545 7894092343 8 70196921888 7664167323 9 77861089211 7440939149 10 85302028360 Present value of an Annuity of 1. 10 85302028360 2559060851 9 77861089211 2335832676 8 70196921887 2105907657 7 62302829544 1869084886 6 54171914430 1625157433 5 45797071863 1373912156 4 37 T 70984019 1115129521 3 28286113540 848583406 2 19134696946 574040908 9708737863 : Since Or, it may be deduced thus : An annuity of 1. in n years amounts to , (61). The value of that annuity, therefore, at the time of its being entered upon, is the present value of , to be 30 received in n years. Hence, multiplying this expression by v n , or l-i-(l-t-r) 71 , we obtain as before. By this formula, calling in the aid of logarithms if necessary, as many values as may be judged requisite for the purpose of verification may be obtained. 73. Reduction of the previous equation gives ra (w ) = l v n , which establishes the property above noticed (71), in virtue of which the separate construction of a table of the powers of v is rendered un- necessary. PROBLEM X. 74. To construct, by logarithms, a table of the present value of an annuity of 7 1, In practice, the use of the first of these formula? is requisite only for a single value, since the present value of an annuity for two years will always be greater than 1. 75. The calculation of the first ten terms is in the margin. The value for one year is v. Log.v, therefore, is first set down, and imme- diately under it, and on every 4th following line, the same logarithm is repeated, since, as the formula? show, this quantity forms part of the addend in each partial operation. The table is then applied, as indicated by the for- mula? ; and when all the logarithms have been found the natural numbers may be taken out. 76. SCHOLIUM. A treatise on Interest is not here contemplated. A few results in that theory, for which we may hereafter have occa- sion, are therefore introduced in this place. IXJ V. Preaent value of an Annuity ofl. i 1-987163 -970874 987163 0-012837 307477 987163 464396 15 3 451574 2-82861 987162 582987 55 4 570204 987163 673672 3 5 660838 4-5797I 31 r)' =, l+r=-,and(l+r)-=-. Also, r v l-v v y v n and 1 v=vr. The interest of 1. for a year being r, it follows that 1. is the present value of a per- petual annnuity of r ; whence we find, by proportion, for the present value of a perpetual annuity of 1., 1-r-r. This is usually denoted by P. 5 660838 4-5797' 987163 746580 32 6 733775 5-41720 98/163 807282 64 7 794509 6-23030 987162 859149 8 TO * 8 846319 7-01970 987163 904142 17 9 891322 7-78613 987163 943778 20 930961 * CHAPTER III. OF PROBABILITY. 77. IT is not intended to enter here into a disquisition on the Doctrine or Theory of Probability. It is necessary, however, for the better understanding of what follows, that we should have before us its fundamental principles. 78. The probability of a future event is measured by a factor, by which, the value of any advantage which the occurrence of that event is to bring us being multiplied, the product is the value of our expect- ation before the event is determined. From this it follows 1st. That the value of this factor can never exceed unity. For if it could, in that case the value of the expectation would exceed the value of the advantage expected ; which is absurd. 2nd. That the measure of certainty, which is the highest degree of probability, is unity. For if the event, the occurrence of which is to bring us an advantage, is certain to happen, the value of our expecta- tion is equal to the value of the advantage, and unity is the only factor which, employed as above, will allow this equality to subsist. 3rd. That the measure of impossibility of occurrence, considered as the lowest degree of probability, is zero. For, if the event cannot pos- sibly occur, our expectation in regard to it is worth nothing, and zero is the only factor which gives for product. 4th. Hence it farther follows, that all other degrees of probability are measured by fractions less than unity, which may of course be exhibited in either the vulgar or the decimal form. 79. When, out of a number of events, one or other of which must happen, to the exclusion of the rest, we have no reason for expecting the occurrence of any one in preference to any of the others, we say that all are equally probable ; and the probability of each is measured by the fraction which has unity for its numerator, and the whole number of events for its denominator. Thus, if an urn contain ten balls, one of which is to be drawn by a person who does not see the balls, all the ten events that may arise are equally probable, since, 33 before the drawing we can assign no reason for the occurrence of any one ball in particular, a similar and equally cogent reason to which may not also be assigned for the occurrence of any of the others. And the measure of the probability of the occurrence of each is . For, let the balls be marked 1 to 10, respectively, and let it be a condition that an advantage is to be received by either A, B, C, &c., according as the ball drawn is No. 1, No. 2, No. 3, &c. Now, the expectations of A, B, C, &c., are of equal value, and being ten in number, each of them is worth one-tenth of the whole. But the value of the whole is just the value of the advantage to be received ; for, since he who should buy the whole would be certain to receive the advantage, he ought in equity to give that value in return. The fraction , there- fore, the multiplication by which of the value of the advantage produces the value of the expectation in respect of each of the events, is the measure of the probability of any one of those events. (78.) 80. From this it readily follows, that the probability of an event which may be produced by the occurrence of any one out of two or more of the simple events circumstanced as described, is measured by the fraction whose numerator is the number of favourable events, as they are called, and denominator the whole number of events. For example, if, in the case supposed, the balls are of different colours, six being white, three black, and one red, then will the several probabilities of the ball drawn being white, black, or red, be denoted by the fractions 63 1 , , and , respectively. For the whole number of simple events, all equally probable, is, as before, ten ; and of these, six favour the occurrence of Welt,*and one favours the occurrence of red. 3 /**>*** 81. It is apparent in each of the cases supposed, that the sum of the probabilities of the different events to which that case can give rise, is equal to unity. Thus, in the first case, , (the probability of each event,) x 10, (the number of events,) = 1 ; and in the sedond, 631 TQ+ TQ-fTpj = l. The same thing will be found to subsist in every case in which the probabilities of the different events have been cor- rectly determined; and a little consideration shows that it ought to do so. Hence if, of the events that may arise out of a given case, the probabilities of all except one are known to us, the probability of that one will be determined by subtracting the sum of the known proba- bilities from unity. And, in like manner, if the probability of only 34 one of the events is known, the sum of the probabilities of all the others will be determined by subtracting the known probability from unity. But the sum of the probabilities of all the others, being the probability that some other event than that specified will be the event that happens, will evidently be the probability that the event in ques- tion will not happen, or in other words, that it will fail. Hence, if p denote the probability that a specified event will happen, the probability that it will not happen will always be denoted by 1 p. Or, if we denote the probability of its failing by q, the following equation will always subsist, p + q = 1 . Two events whose probabilities are so related are called contrary events. 82. If an event consist in the concurrence of two or more indepen- dent events, that is, events the happening or failing of any of which has no influence on the happening or failing of any of the others, the probability of that event is equal to the product of the probabilities of the events by whose concurrence it is produced. For example, if the event be the throwing of aces with one die twice running, or with two dice each thrown once, its probability is ^. For g being the proba- bility of an ace from one throw of each of the two dice, or each throw of the single die, we have ^ x ~ = ^- O O OO 83. That this is consonant with the principle already established is easily shown. Take the case of the single die, which is to be thrown twice. Any one of the six faces may turn up at the first throw, and any one also at the second throw. In the two throws, therefore, we are presented with six times six, or thirty-six different events, all equally probable ; and of these one only favours the occurrence of the event in question, namely, that in which ace turns up at the first throw, and also at the second throw. The probability of this event, therefore, is , (79,) as already shown, oo So, also, if there are to be three throws, the probability of an ace three times running will be x ~ x ^ = ?n~A* O O O .C'lO 83. When an event can happen in more ways than one, its probability is equal to the sum of its probabilities in respect of the different ways. This principle is identical with the first when the probabilities of the different ways of occurrence are the same. For, returning to the case of the urn with ten balls, let the event in question be the occurrence of the colour white as the result of a drawing. Then, as there are six white balls, the event can happen in six different ways, for it will be 35 produced by the occurrence of any one of the white balls. And the probability of each of these being , the probability of the event in in question is, by this principle, Y^X 6 = r-r, as was already found. We have, therefore, now to show the application of this principle to cases in which the probabilities of the different favourable and unfavour- able events are unequal. Let there be two urns, the first containing four balls, of which three are white and one black, and the second five balls, of which two are white and three black. Then, if a ball is to be drawn from some one of the urns by a person ignorant of their contents, the probability that the ball so drawn will be a white ball will, by the principle just enunci- ated, be determined as follows. The probability in respect of the O T O first urn is TX o o- For ^ tne fi rst urn i tne one selected, the 4< A o 3 probability of a white ball is ; and that this urn will be selected the probability is . The product of these probabilities, therefore, namely, o , is the probability of the concurrence of these two events, namely, o the selection of the first urn, and the drawing of a white ball from that urn. In like manner the probability in respect of the second urn is 211 found to be - x o =F- Therefore the probability of the occurrence of o -I oo a white ball in the circumstances supposed is o+H"=T7v Now, en- o O 4U quire if this value accords with that indicated by our original principle. 84. The probability of a specified event, as the drawing of a ball of a given colour from an urn, is evidently not affected if the numbers of balls of the different colours in the urn be varied in the same ratio. o o Thus - and - are the same probability, the first arising from two white o y , balls to four black, and the second from three white balls to six black. We may therefore suppose the two urns in the foregoing case to be replaced by others, containing twenty (4 x 5) balls each, the first hawng fifteen white and five black, and the second eight white and twelve black. The probabilities in respect of the different urns are the same as before, that in respect of the first being x -==-, and that in &0 & 4U o 8181 respect of the second ^Q x ^= =-. We may now suppose the balls 36 placed together in one urn, for the probability of each of the parcels of twenty being the one selected from, will evidently be the same after the mingling of the balls as before. The case is therefore reduced to the drawing of a white ball from an urn containing 15 + 8 = 23 white balls, and 5 + 12 = 17 black, and consequently forty balls in all. And 23 this probability is ^, (79,) as already found. By similar reasoning the principle may be shown to hold when the number of ways in which an event may happen, differing anyhow in regard to their relative probabilities, is more than two ; and hence it may be considered as universally established. 85. We shall now, in the way of illustration of what has been said, exhibit in a tabular form the expressions for the probabilities of the various contingencies arising out of the occurrences of three indepen- dent events. Call the events A, B, and C, and denote their probabilities by a, bj and c, respectively. That of the three events A, B, C, the probability is, all will happen all will not happen, that is, that") one or more will fail . , .) abc. labc. all will fail all will not fail, that is, that one") or more will happen ...... ) A will happen and B and C fail B A and C C A and B A and B will happen and C AandC B B and C A b(la)(lc) c(la)(I b) ab(l c) =bba =ab =ac =bc abc. acb. bca. 86. Having thus laid down the fundamental principles of the Theory of Probability, we have now to show how that theory is applied to questions having reference to the duration of human life. The application of which we now speak is founded upon two as- sumptions. Of these the first is, that the experience of the future will accord with that of the past ; that is to say, that what ratio soever may have been found to subsist in time past between the number sur- viving and the number dying in a given time, out of a specified number 37 of individuals observed upon, the same ratio will be found to subsist in time to come between the number living and the number dying in the same space of time, out of any number of individuals similarly circumstanced with the others. And the second assumption is, that the individuals, the probability of whose living or dying, in any speci- fied time, may be in question, have all the same prospects of longevity with each other. 87. These assumptions, which are absolutely necessary for the pur- pose in view, need little to be said in their support. As regards the first, there is no fact in statistical science better established than that the ratios of the numbers surviving to the numbers dying, from year to year at the different ages, approach fixed ratios ; and we therefore but assume, that what has been observed constantly to happen will continue to happen. As regards the second assumption, it may or may not be true in any particular case. If, however, we assume, as we are warranted in doing, that deviations from the truth in both di- rections are equally probable, it will follow, that if we are to disregard these, and so proceed upon a fixed and uniform principle, the mode proposed is the one most likely to conduct us generally to the truth. 88. The records of the past, which in these investigations we take for our guidance, are arranged in the form of tables of mortality ; that is, tables showing, out of a number supposed to have entered upon life together, the numbers who completed each year of existence, and consequently the numbers who died in each year. These tables are familiar to all who have any acquaintance with this subject, and there- fore need no farther description here. The Carlisle Table, constructed by Mr. Joshua Milne, is probably the one best known, and is certainly, as shown by the striking confirmations it has received, as much en- titled to confidence as any other. From it, therefore, our numerical illustrations will be taken. Our general investigations, however, will be equally applicable to any table of the same form, as they will be conducted by means of symbols. 89. Denote by the letter /, with the age attached as a suffix, the number represented by the table as attaining each age. So shall the numbers in the table, opposite the ages, 0, 1,2, ... a?, . . . x + n, be denoted by 1 0) l lf / 2 , . . . l x , ... l x+H , respectively. Then will the probability that a life aged x will survive n years, be denoted by l x+n ~r-l x ' For, if the representation of the table were that there was to be but one survivor, the probability that any of the l x persons would be that survivor, would, in accordance with what has been laid down, be I-H/^. But the number of survivors is to be l f+n . There are, therefore, l f+n ways in which the survivorship in question may take 38 place. The probability of that survivorship consequently is the sum of l x+n probabilities, each of which is equal to IH-/^, or a+n -r-l x * (83.) 90. This function is usually denoted by p jen , the first suffix being the age of the life, and the second the number of years, the survivor- ship of that life at the end of which is in question. When the number of years is unity, the second suffix is usually omitted, so that the probability that a life aged x years will survive one year, is denoted by p x> and the like for a life aged y years by p y . 91. The function^ occupies a most important part in the doctrine of life contingencies. We here direct attention to one of its applica- tions. Many others will be hereafter shown. If a register of a stationary population, comprising lives of all ages, be carefully formed, distinguish- ing the ages, and if the deaths that occur amongst them, in one year, at each age, be noted, the number of survivors at the different ages will be known, and consequently the value of the function p x for each age. Now, since P*= l ,+i-*-l*> *A=kn- Hence if, commencing at the youngest age, 0, we assume any number for the radix, as it is called, and multiply this number by p , we obtain the number of survivors at the end of one year, according to the observed rate of mortality. Multiplying the number thus found by/? p we obtain the number of survivors at the end of two years, and so on. These numbers being tabulated in connexion with the different ages, a table is formed, representing, in a systematic manner, the mortality which has prevailed, during the period of our observations, among the population observed upon. If the values of p x for each age are given in logarithms, it is obvious that the formation of a mortality table will be thereby much facilitated. For, to find the logarithms of the num- bers surviving at each age, out of any assumed radix, we shall have merely to add continuously, commencing with the logarithm of the radix, the logarithms of the successive values of p x . 92. It thus appears that, / being the radix, but /, = l .f = l Q .p 0je . Hence, by substitution, and dividing by / ; or, more generally, changing into oc, and x into x + n, P*-P*+rP*+f ' 'P X+ n-l=P X .n' That is, the probability that a life aged x years will survive n years is equal to the product of the probabilities that n lives, aged respectively x, x+ 1, # + 2, . . . as+n 1, will survive one year. 93. This may be otherwise shown. Adopt, for brevity, the symbol (x) instead of the phrase, " a life aged x years." The survivorship of (x) for, say two years, will arise from the concurrence * of these two events, first, his surviving one year at the age x, and secondly his sur- viving one year at the age a?+ 1. The probability of the first event is p x , and of the second p x+r Hence the probability that both will happen, that is, that (x) will survive two years, is p x -p x+l ', that is, Pz'Px+iPxv And by similar reasoning the like may be shown for any other number of years than two. 94. Since out of l x individuals aged x years, the number who survive n years is l x+n , it follows that the number who die therein is l x l x+n - Hence, in accordance with what has been shown, the probability that (x) will die in n years is -^^ = l--^ = l-^, n . This follows * l x also from a somewhat different consideration. At the end of n years (x} must be either alive or dead. These, therefore, are contrary events, and the probability of one of them being p xn , that of the other is 95. The number who, out of l x individuals, die in the nth year from the present time, is obviously l x+n _i l x+H * Hence the probability that (x) will die in that year is, (80,) ( l x+n-\ l*+n]-*-lx=Px.n-l Px.n' That is, the probability of dying in the nth year is equal to the excess of the probability of living n 1 years, that is, of entering upon the nth year, over the probability of surviving that year. 96. It is easy now, from what has been established, to deduce the probabilities of the various contingencies, as regards survivorships, that may arise out of combinations of two or more lives. We give here the expressions for the cases in which two lives only are concerned. The probability that two lives, (x) and (y} } will jointly survive n years, the event in question being the concurrence of the two events which consist in their singly surviving the term, is p xn -p yn , which we shall hereafter write P( xy ) n . The probability that both will not survive n years, that is, that either or both will be dead at the end of the term, is 1 P( xy - }n . The probability that both will be dead, that is, that neither will survive the term, is, (1 -flrJ (1 -P 9M ) = 1 -P XM -P y * Observe that by the concurrence of two or more events their simultaneous happening is not implied. Any portion of time may intervene between the occurrences of the different events. The probability of two aces from a single throw of two dice is the same whether both are thrown now or a hundred years hence, or whether one is thrown now and the other a hundred years hence, 40 The probability that both will not be dead at the end of the term, that is, that either or both will be then alive, is, 1 - (1 ~P X . J ( l ~P y .n) =P*.n +P,.n ~P( X ,}n' The probability that (x) will be alive and (y) dead, is, P X .nV-P v .n}=P X .n-P( X . y }n> and, in like manner, the probability that (y) will be alive and (x) dead, is, Py.n-P( x Jn> The probability that both (x) and (y) will die in the wth year from the present time, is shown, as in the case of a single life, to be 97. If with any of these contingencies be combined the condition, that the deaths or survivorships shall take place in a specified order, the probability of the proposed contingency is materially different from that of the contingency on which it is founded. For the treatment of cases involving the condition in question, a farther assumption with regard to the mortality table is necessary. The assumption now requisite is, that the deaths which take place in each year of age are uniformly distributed over the year in which they take place ; so that if any year of existence be supposed to be divided into m equal parts, (m being any whole number,) the probability, before the year is en- tered upon, of a specified life failing in any one of those parts is the same as that of its failing in any other. From this by no means unreasonable assumption, it at once follows, first, that of any number of lives which fail in a year, the probability of any one of them occu- pying an assigned place in the order of failure, is the same as that of any other occupying an assigned place, the differences of age amongst the proposed lives being any whatsover ; and secondly, that the pro- bability of all the lives failing in any assigned order in one year, is the same as that of their failing in any other order in the same time.* 98. Hence, if we denote by q the probability that any number of specified lives will fail in a given year, the probability that any one of them will occupy an assigned place in the order of failure will be denoted by q divided by the number of places, that is by the number of lives; and the probability of the failure of the whole taking place in an assigned order, will be denoted by q divided by the number of orders, that is by the number of permutations that can be formed out of the number of given lives taken all together. If the lives are two in number, (#) and (y} } these probabilities are identical, being in that case, if the nth year is in question, each equal to * See an elaborate demonstration of this theorem in Mr. Milne's Treatise, pp. 63 to 68, or Mr. Jones's, pp. 148 to 150. 41 99. Let it now be required to determine the probability that of two lives, (x) and (y) } one of them in particular, as (x), shall die in the nth year, and the other, (/), be alive at the moment of (x)'s death. This event can happen in two ways, first by (#) dying in the nth year, and (y) living over that year; or, secondly, by both lives failing in the nth year, (x) the first of the two. The probability of the first way of happening is, (82 and 95), (Px.n-l~~Pxn)Py.n> aT1C ^ ^at ^ tne secon ^ &S jUSt Shown, is \(P x .n-l-Px.n}(Py.n-l-Py.,) '> hence, (83), \ (P x . n -i~P^ (P y . n -i+P y .n)> tne sum of these two, is the probability required. It is unnecessary for present purposes to carry these investigations f-.rther. CHAPTER IV. OF THE TABLE OF ELEMENTARY VALUES. 100. THE functions tabulated in the following pages come into use, both singly and variously combined with each other and with constant quantities, in the constructions with which we are hereafter to be oc- cupied. They consist of the following, for each age, according to the Carlisle Table of Mortality: Log.^, Colog.^, Log.-i^" 1 ^ 1), and Log.^- 1 1). The differences between the successive terms of the several series are also given, the object being to facilitate the formation of the combined series for which we have occasion. The manner of thus using the differences is now to be shown. 101. (1.) To form the series \og-vp x for each age. This function being equal to \og.v + \og.p x , the series to be formed will be the tabu- lated series log.p x , with each of its terms increased by the constant quantity log.v. Now two series so related have obviously the same series of differences between their successive terms. Hence, as the tabulated series will be reproduced by the continual addition to its first term of the corre- sponding series of differences, so also the required series will be formed by the continual addition to Us first term of the same series of differences. The ex- ample in the margin shows the formation of the first few terms of the proposed series, when the rate of interest is 3 per cent., and log.t? consequently 987163. 10.2. This mode of formation possesses various ad- vantages. First, the terms being dependent on each other, sufficient verification is obtained by occasional recurrence to the tabulated series, as shown in the proof appended to the example. A discrepancy will establish that error has been committed, which must be traced to its source and removed. Secondly, to form this scries in the most obvious way, all the terms of the tabulated series will have to be written down, and underneath each the constant logarithm Log.V/7*. 987163 522879 103 A 102 101 TOO 99 510042 255272 7(5531-1 0/5721 841035 036983 878017 021995 900013 982415 98 882428 Proof. log.?? 987163 8952G5 log.p, 882428 FIG. ]. to be added to it. By the method now proposed half this labour is saved, the series of differences only requiring to be written down before proceeding to the additions. But, thirdly, even this labour may be spared, if the series of differences be written, once for all, on a set of perforated cards of the form shown in the margin. These being pro- perly placed will admit of the ad- ditions being as readily performed as if proceeded with in the ordi- nary way. 103. If one series only has to be formed, it will obviously not be worth while to prepare a set of cards. But if series involving different rates of interest, and es- pecially in which two or more lives are concerned, have to be formed, the trouble of preparing the cards will be amply compensated by the saving effected in their application to these purposes. If the cards be made of a length sufficient to admit of thirteen values on a side, then, as both sides may be used, four cards will be sufficient for the Carlisle Table, or any other at present in use.* 104. In these series it is seldom requisite formally to set down the indices of the several terms. In most of them it is usually, (in the series now before us it is always,) 1. Where doubt exists, and it is requisite to ascertain the index of a particular term, this can be done by reference to the tabulated series ; arid the determination of one index is usually sufficient, ex- cept, perhaps, in one or two instances near the beginning of some of the series, to determine the whole. 105. The constant addend, log.#, is of course true to the nearest unit in the last place. But it is not absolutely true, and it is desirable, A lo cr ri O'/V 103 I 5 1 4 2 1 2 5 5 2 7 2 102 1 1 7 5 7 o 1 "i r i 3 6 9 8 3 100 1 1 2 1 9 9 5 99 1 9 8 2 4 1 5 98 r 1 9 9 5 5 9 97 r 1 2 6 9 96 1 i 9 9 1 6 2 95 r i 9 9 4 5 4 94) 1 9 9 4 6 5 93 1 1 9 8 7 G 6 7 * The best way of making the cards is, when formed into shape, to tie them together, and cut out the perforations with a chisel. 44 TABLE OF ELEMENTARY VALUES. CARLISLE RATE OF MORTALITY. X L g^* A Colog.^ A Log. tfPT'+l) A Log. taT 1 -!) A a? 103 1-522879 2552/2 0-477121 744728 0-301030 823909 0-301030 522879 103 102 778151 075721 221849 924279 124939 954242 1-823909 778151 102 IOI 853872 036983 146128 963017 079181 978811 602060 853872 IOI 100 890855 021995 109145 978005 057992 987765 455932 890855 TOO 99 912850 982415 087150 017585 045757 009760 346787 088941 99 98 895265 995590 104735 004410 055517 002475 435728 020204 98 97 890855 002690 109145 997310 05/992 998489 455932 987765 97 96 893545 991062 106455 008938 056481 005037 443697 039673 96 95 884607 990454 115393 009546 061518 005429 483370 039509 95 94 875061 994605 124939 005395 066947 003091 522879 021189 94 93 869666 987667 130334 012333 070038 007128 544068 045757 93 92 857333 996539 142667 003461 077166 002015 589825 012235 02 9 1 853872 015029 146128 984971 079181 991297 602060 944953 y 91 90 868901 025708 131099 974292 070478 985406 547013 891764 9 89 894609 997582 105391 002418 055884 001358 438777 011114 89 88 892191 002005 107809 997995 057242 998874 449891 990801 88 87 894196 012430 105804 987570 056116 993076 440692 939274 87 86 906626 009680 093374 990320 049192 994668 379966 947463 86 85 916306 008598 083694 991402 043860 995309 32/429 948490 85 8 4 924904 004064 075096 995936 039169 997798 275919 973753 84 83 928968 005182 071032 994818 036967 997205 249672 964440 83 82 934150 003463 065850 996537 034172 998141 214112 974768 82 81 937613 006019 062387 993981 032313 996785 188880 952853 81 80 943632 001635 -056368 998365 029098 999130 141733 986384 80 79 945267 004698 054733 995302 028228 997510 12811/ 958631 79 78 949965 000677 050035 999323 025738 999642 086748 993744 78 77 950642 002164 049358 997836 025380 998857 080492 979414 I 77 76 952806 003592 047194 996408 024237 998111 059906 963801 76 75 956398 002563 043602 99/437 022348 998656 023707 972386 75 74 958961 005715 041039 994285 021004 997017 2-996093 9319/8 74 73 9646/6 004680 035324 995320 018021 997571 928071 935904 73 72 969356 004303 030644 995697 015592 997778 863975 932108 72 7 1 973659 003312 026341 996688 013370 998297 796083 939976 7 1 7 9/6971 001160 023029 998840 011667 999405 736059 976971 7 69 9/8131 001212 021869 998788 011072 999379 713030 974614 69 68 979343 000938 020657 999062 010451 999520 687644 979343 68 67 980281 000857 019719 999143 0099/1 999562 666987 980281 67 66 981138 000642 018862 999358 009533 999673 647268 984655 66 65 981780 000595 018220 999405 009206 999696 631923 985268 65 64 982375 00068/ 017625 999313 008902 999649 617191 982375 64 63 983062 000380 016938 999620 008551 999807 599566 989956 63 62 983442 000732 016558 999268 008358 999627 589522 980009 62 61 984174 001033 015826 998967 007985 999475 569531 970163 61 60 985207 002337 014793 997663 007460 998813 539694 924153 60 59 98/544 001814 012456 998186 006273 999081 463847 930721 5 9 58 989358 001470 010642 998530 005354 999256 394568 934689 58 57 990828 000841 009172 999159 004610 999576 329257 957828 57 56 991669 000477 008331 999523 004186 999759 28/085 974178 56 55 992146 000453 007854 999547 003945 999771 261263 973921 55 54 992599 000331 007401 999669 003716 999834 235184 980010 54 53 992930 000417 00/070 999583 003550 999789 215149 973334 53 52 993347 000401 006653 999599 003339 999798 188528 972826 5 2 45 TABLE OF ELEMENTARY VALUES. (Continued.) X Log.^ A Colog.j^ A L - + l A Log.^ A X 5 1 T-993748 000386 0-006252 999614 0-003137 999806 2-161354 972208 5 1 5 994134 999882 005866 000118 002943 000059 133562 008612 5 49 994016 999889 005984 000111 003002 000056 142174 008027 49 993905 999707 006095 000293 003058 000148 150201 020639 48 47 993612 999905 006388 000095 003206 000048 170840 006386 47 4 6 993517 000003 006483 999997 003254 999998 177226 999766 46 45 993520 000006 006480 999994 003252 999997 176992 999680 45 44 993526 000094 006474 999906 003249 999953 176672 993526 44 43 993620 000093 006380 999907 003202 999953 170198 993620 43 42 993713 000263 006287 999737 003155 999868 163818 981304 42 41 993976 000339 006024 999661 003023 999829 145122 974671 4i 40 994315 000496 005685 999504 002852 999750 119793 960101 40 39 994811 000312 005189 999688 002602 999843 0/9894 972909 39 38 995123 000137 004877 999863 002445 999932 052803 987570 38 37 995260 000133 004740 999867 002377 999933 040373 987573 37 36 995393 000129 004607 999871 002310 999935 027946 987568 36 35 995522 000046 004478 999954 002245 I 999977 015514 995522 35 34 995568 000045 004432 999955 002222 999977 011036 995568 34 33 995613 999965 004387 000035 0021991000018 006604 003438 33 32 995578 999967 004422 000033 002217 000016 010042 003265 32 3 r 995545 000045 004455 999955 002233 999978 013307 995545 31 3 995590 000121 004410 999879 002211 999939 008852 987903 30 29 995711 000494 004289 999506 002150 999751 3-996755 946493 29 28 996205 000408 003795 999592 001901 999796 943248 950448 28 27 996613 000176 003387 999824 001697 999912 893696 976868 27 26 996789 000023 003211 999977 001609 999988 870564 996789 26 25 996812 000096 003188 999904 001597 999952 867353 986593 25 24 996908 000022 003092 999978 001549 999989 853946 996908 24 23 22 996930 996952 000022 000021 003070 003048 999978 999979 001538 001527 999989 999989 850854 847784 996930 996952 2 3 22 21 996973 999950 003027 000050 001516 000025 844736 007192 21 20 996923 000021 003077 999979 001541 999990 851928 996923 20 jO 996944 000022 003056 999978 001531 999989 848851 996944 19 18 996966 000020 003034 999980 001520 999989 845795 996966 lo 17 996986 000091 003014 999909 001509 999955 842761 986767 J 7 16 997077 000226 002923 999774 001464 999887 829528 964893 16 *5 997303 000291 002697 999709 001351 999854 794421 950306 *5 M 997594 000150 002406 999850 001205 999925 744727 972040 14 997744 000079 002256 999921 001130 999960 716767 984380 13 12 997823 000078 002177 999922 001090 999961 701147 984035 12 II 997901 000145 002099 999855 001051 999927 685182 968937 II 10 998046 999742 001954 000258 000978 000130 644119 054162 10 9 997788 999345 002212 000655 001108 000328 708281 112742 9 8 997133 999030 002867 000970 001436 000487 821023 127093 8 7 996163 998470 003837 001530 001923 000769 948116 146549 7 6 994633 997566 005367 002434 002692 001226 2-094665 163604 6 5 992199 995144 007801 004856 003918 002456 258269 212610 5 4 987343 995858 012657 004142 006374 002107 470879 125056 4 3 983201 987648 016799 012352 008481 006339 595935 245583 3 2 970849 992653 029151 007347 014820 003812 841518 101342 2 I 963502 963920 036498 036080 018632 0191/2 942860 316957 I 927422 0725/8 03/804 T-259817 46 for the sake of accuracy, to take account of its deviation from the truth. This is done thus : log.v to 8 places, is 98716278 ; in using 987163, therefore, we commit each time an error of '22 in the 6th place in excess. This amounts to about one-fourth in the place in question, and the error will consequently be neutralized, (so far at least as this is practicable,) by abating a unit in the 6th place from about every fourth value.* The portions of the various series we shall em- ploy in our examples will always have been subjected to this correction. 106. (2.) To construct the series co\og.vp x . The terms of this series are obviously those of the tabulated series, colog.j^, increased by the constant quantity, colog.v, or log.(l -f r),(76). The construction will be effected, therefore, by the continued addition to the first term of the series in question, increased by log.(l+r) = 012837, of the differences of that series. The correction to be made for the inaccuracy in the last place of log.(l + r) will be, an increase of a unit in the last place of about every fourth value. It is unneces- sary to give an example. 107. (3.) To form the series colog.Vv.j^. This series will be the tabulated series, colog.jt?^, with each of its terms increased by the constant quantity colog.N/tf = log.Vl -fr = ilog.fl -fr)= 006419; and it will be constructed by adding continu- ally to the first term of the tabulated series increased by the quantity in question, the differences of this series. The correction will be, since log.(l + r) to eight places is 00641861, a diminution of the 6th figure by a unit 39 times in a hundred, which is a little more than once in three times. Here, too, an example is unnecessary. 108. (4.) To form in series all the different values of log.j Values of x-y i 2 3 4 * * y 103 102 101 100 99 * * ^=103 522879 522879 y 102 101 100 99 98 * * X=I02 778151 778151 y 101 100 99 98 97 * * a?=ioi 853872 8538/2 y TOO 99 98 97 96 * * X=IOO 890855 890855 y 99 98 97 96 95 # * #=99 912850 912850 y 9 8 97 96 95 94 * * #=98 895265 895265 045758 2552/2 556302 075721 707744 036983; 781710 021995 825700 982415 790530 995590 ,301030 075721 632023 036983 744727 021995 803705 982415 808115 995590 786120 002690 788810 991062 376751 036983 669006 021995 7667221 982415 786120 9.95590 803705 002690 413734 021995 691001 982415 749137 995690 781/10 002690 806395 991062 779S/2 990454 435729 # * 673416 * * 7447271 * * 784400 * * 797457 * * 770326 * * * The correct abatement, in this case, would be 22 units in one hundred terms. 47 98 99 IOO IOI 102 I0 3 5 4 3 2 i 515078 995144 4 3 2 I 765494 995858 3 2 I 837073 987649 2 I 861705 992652 i 8763521 963920 510222 .995858 761352 987649 824722 992652 854357 963920 o 840272 506080 987649 749001 992652 817374 963920 818277 493729 992652 741653 963920 781294 486381 963920 705573 450301 o |822687ji Above is a type of the operation here requisite, and the necessary explanation follows. 109. The initial value in each column is log./?,,, corresponding to that value of x which stands at the top of the column, and the first addend is log.jt? y corresponding to the same value of y. The succeed- ing addends are the differences of the series log.jt? 7 , commencing with that difference which belongs to the term of the series just set down, and the successive sums are the terms of the required series which correspond to the value of x at the top of the column in which they are found, and to the values of y immediately adjoining them. The number of columns will obviously be 104, (one fewer than the number of ages in the mortality table,) and the type, when completed as indi- cated, will contain all the different values of log.jt?^), as required. For, log.^ and log.j^, of which log.p^ y ) is the sum, being terms of the same series, the function is symmetrical with respect to x and y, and all its different values are obtained by combining, as is here done, each of the values of one of these quantities with all the values of the other that do not exceed it. 110. It will be noticed, also, that the several horizontal lines of the type consist of those values of the function log.p^^, ranged in order, in which x and y have the same difference. That is to say, opposite each value in the column headed x y, are to be found all those values of the function Iog.j9 (j ij} in which x y has the value indicated, and so arranged that in passing from any one value of the function to the next both x and y decrease by a unit. These values, in order, form the series required for use, and by reason of this commodious arrangement, they admit of being abstracted with facility, unattended by risk of error. 111. We see that, taking any term of the combined series, and adding to it continually the differences of log.p, , from and after the term with which we set out, other terms of the combined series are successively produced, in which x remains constant while y decreases by a unit in each succeeding term. But this property is obviously not confined to the differences of log. ; it belongs as well to the differences 48 of log. p x . If, therefore, to any term of the combined series we add continually the differences of log.jt?.,., commencing with the difference belonging to that term of log.^ included in the term of the series with which we set out, the terms of the .series produced will be those in which y remains constant, and x decreases by a unit in each suc- ceeding term. This suggests a method of verifying the operation typified above, which may be applied as follows : Let the first horizon- tal line, (x y=0,) be completed, and also the first column, (x = 103,) which last may be verified as in (102). From this column select three or four values at suitable intervals, <0 frP(*rl and make them the initial terms of as many series in ^ 255272 which x varies and v remains constant, verifying each j- j mi j i -ii t 102-99 691001 series as just directed. The values produced will be ^^ 075721 found to be the terms of the required series, which be- long to compartments in the type ascending diagonally ^^ 036983 from the place of the initial term of the several series thus formed. They may therefore be inserted in their * places, and they will thus serve, as they are successively reached, to verify the additions in the several columns. ^ 103 255272 An example showing the formation of portions of two of these auxiliary series is here given, comparison of ^ 102 075721 which with the type will render farther explanation Jr loro 781294 unnecessary. Am 036983 112. All the foregoing operations the formation of > the auxiliary series, as well as of those occupying the columns of the type may obviously be performed by means of the set of cards already described, for they are the terms of the same series of differences, and in the same order, although commencing usually at different points of the series, that form the addends in each case. Hence the labour of construction is comparatively small. Each value is produced by an addition of two lines, and the only writing, after the formation of the first line, (x y = 0,) is the setting down of the results. 113. It will be observed that, according to the mode of construction now described, the successive terms of the several series in which x y is constant, are found in successive columns; so that to form one of these series in which x y has a given value, all the columns in which terms of that series are contained, must be completed down to the terms in question. Hence, if only a few of those series be wanted, those for example in which x y = 10, and multiples of 10, successively, in forming them by the method described, a great many values of the general function which are not required for the purpose 49 in view, are also formed. And although each of these is formed in this way with less labour than is required for its formation in any other way, yet it may very well happen, if the values of x y in the series wanted are far apart,, that the labour is greater than needs be en- countered in the circumstances. We therefore proceed to show how any one of these series may be formed independently of the others. A few examples for different values of x y follow. 103 103 103-103 A 103 A 103 IO2'I02 Al02 Al02 lorioi A 101 Aioi IOO* IOO 100 100 lOO'IOO x y=o 522879 522879 103 102 I03*I02 Al03 A 102 102*101 A 102 Aioi lorioo A 101 A 100 100-99 IOO 99 100-99 xy=i 522879 778151 103 101 103-101 A 103 Aioi 102*100 A 102 A 100 101-99 A 101 A 99 100*98 cation. IOO 98 100*98 xy=2 522879 853872 103 3 iQ3'3 A 103 A 3 IO2'2 A 102 A 2 lOI'I A 101 Ai lOO'O IOO lOO'O x y=iOQ 522879 983201 045758 2552/2 255272 301030 2552/2 075721 376751 | 255272 036983 506080 255272 987648 556302 075721 075721 632023 075721 036983 669006 | 075721 021995 749000 075721 992653 707744 036983 036983 744727 036983 021995 766722 036983 982415 817374 036983 963920 781710 890855 ! 890855 781710 ' 803705 Verifi 890855 912850 786120 i 890855 895265 818277 890855 927422 803705 786120 818277 114. Little explanation of the foregoing seems to be requisite after what has been already shown. All the values here formed will be found in the type previously given. The successive values here as there being mutually dependent, the same sort of verification applies ; and it will be well to form a sufficient number of values for this pur- pose first of all, and to insert them in their places at once. 115. This operation, as well as that previously described, may be performed by means of cards, which being once prepared, the subse- quent labour of writing is reduced to that of setting down the results. The following figures show the form of the cards here requisite, and the mode of applying them for any given value of xy. 116. Two sets of cards are requisite, and figs. 2 and 3 show the first, or portions of the first, card of each set. Fig. 4 shows the cards arranged for the formation of the series in which x y = Q, and fig. 5 shows them arranged for the formation of that in which x y = l. The arrangement for any given value of x y is sufficiently obvious. The cards have to be so placed that each pair of ages, having between them the given difference, shall be brought together. The value cor- 50 o* II GO CM (M 01 i-H I * CO CO to tO to tO c ?5} H tO t^. (^ OI 01 Tf 00 GO Oi Oi 1 1 ,_, 1 *$ ^o CM OI co tO tO t - Oi (O Oi Oi Oi ( 1 ^ OI ur Lf ^ < ^ to ^0 to t^ t^ o CO CO CN 01 GO GO M O OI CM to * o o Oi Oi ro c^ M o ON oo O O O O ON ON O o O o ON ON H M M M CO d to OI CO to to - H t^ OI CO Oi 1 1 Oi ^ OI t->. Oi Oi TP to to to to _H CM tO ^ to t^ CO CN CO Oi CN o Oi Oi co N M O ON OO O O O O ON ON M M M M 51 FIG. 5. x = responding to the first of these pairs, namely, that in which a; = 103, being then inserted in its place, the addition proceeds as in the previ- ous example. Compare the first two columns of the example referred to with figs. 4 and 5. 117. (5.) Let it now be required to construct all the different values of Iog.j9( ). The type of this ope- ration is on the fol- lowing page, and it will readily appear that when completed as indi- cated, it will contain all the required values. It will consist of 104 com- partments, of which the first will contain 104 columns and 104 rows, the second 103 columns and 103 rows, and so on, each succeeding compartment contain- ing both one column and one row fewer than the preceding. The ini- tial values in the first compartment are the terms of the series log.jt?^) for x 2/ = 0, and 103 IO2 IOI IOO 99 98 Alog.fl,. 103 IO2 IOI IOO 99 98 Alog-p, 255272 301030 255272 075721 632023 075721 036983 744727 036983 021995 021995 982415 982415 995590 the first addend in each column is that log.^, in which z is equal to the common value of x and y in that column. The remaining ad- dends are the successive terms of the series of differences of log.p,. The initial values in each of the other compartments are taken from the compartments that precede them respectively, as will appear by reference to the type, and the addends consist of the series of differences of log.j^. 118. The series of values of this function wanted for use are those 52 Values .y.z) yz i 2 3 4 2 103 IO2 101 100 99 #=103 y=I03 045758 522879 z 102 IOI 100 99 98 y=iO2 #=102 556302 778151 z IOI IOO 99 98 97 x y- a?=ioi y=ioi 707744 853872 =o. z IOO 99 98 97 96 X= IOO y=ioo 781710 890855 z 99 98 97 96 95 z 98 97 96 95 94 #=99 #=99 825700 912850 t 98 97 96 95 9 1 ; 97 96 95 94 93 #=98 y= 9 8 790530 895265 568637 255272 334453 075721 561616 036983 672565 021995 738550 982415 685795 995590 823909 075721 410174 036983 598599 021995 694560 982415 720965 995590 681385 002690 899630 036983 447157 021995 620594 982415 676975 995590 716555 002690 684075 991062 936613 021995 469152 982415 603009 995590 672565 002690 719245 991062 675137 990454 958608 451567 598599 675255 710307 * #=99 y= 9 8 720965 982415 665591 * #=98 y=9i 681385 995590 yz o i 2 3 4 f 102 101 100 99 98 #=103 y=IO2 823909 255272 z IOI IOO 99 98 97 #=102 y=ioi 410174 075721 z IOO 99 98 97 96 xy- #=IOI y=ioo 598599 036983 = i. z 99 98 97 96 95 #=100 y=99 694560 021995 079181 075721 485895 036983 635582 021995 657577 982415 716555 982415 703380 995590 676975 002690 154902 036983 522878 021995 698970 995590 698970 002690 679665 991062 191885 021995 544873 982415 639992 995590 694560 002690 701660 991062 670727 990454 213880 982415 527288 995590 635582 002690 697250 991062 692722 990454 661181 994605 196295 522878 638272 688312 683176 655786 y * o I 2 3 4 z IOI 100 99 98 97 #=103 y=ioi 154902 075721 z IOO 99 98 97 96 #=IO2 y=ioo 522878 036983 z 99 98 97 96 95 xy- #=101 y=99 657577 021995 = 2. Z 9 8 97 96 95 94 #=100 y= 9 8 698970 982415 z 97 96 95 94 93 #=99 y=97 698970 995590 z 96 95 94 93 92 #=98 y= 9 6 679665 002690 230623 036983 559861 021995 679572 982415 681385 995590 694560 002690 682355 991062 267606 021995 581856 982415 661987 995590 676975 002690 697250 991062 673417 990454 289601 982415 564271 995590 657577 002690 679665 991062 688312 990454 663871 994605 272016 995590 559861 002690 660267 991062 670727 990454 678766 994605 658476 987667 267606 562551 651329 661181 673371 646143 y z i 2 3 4 2 too 99 98 97 96 #=103 y=ioo 267606 036983 z 99 98 97 96 95 #=102 y=99 581856 021995 z 98 97 96 95 94 x-y #=IOI y= 9 8 661987 982415 =3- z 97 96 95 H 93 #=ioo y=9l 676975 995590 z 96 95 94 93 92 #=99 y= 9 6 697250 002690 z 95 94 93 92 9i #=98 y=95 673417 991062 304589 021995 603851 982415 644402 995590 672565 002690 699940 991062 664479 990454 326584 982415 586266 995590 639992 002690 642682 991062 675255 991062 691002 990454 654933 994605 308999 995590 581856 002690 666317 990454 681456 994605 649538 987667 304589 002690 584546 991062 633744 990454 656771 994605 676061 987667 637205 996539 307279 575608 624198 651376 663728 633744 53 in which both x y and y z are constant. Hence, the former being constant throughout the whole of each compartment, and the latter in each horizontal line, any particular series required will be found in the compartments headed with the given value of x y, and in the line opposite the given value of y z. Values for verification may be found precisely as in (111), as shown in the accompanying example from the portion of the first compartment above given. Only here, as both x and y vary in the suc- cessive columns, two differences have to be included in each addition. 119. The whole of the operations now described may obviously be performed by means of the cards ; the principal operation by the single card, fig. 1, and the subsidiary operation, for the verification of the other, by means of the two cards, figs. 2 and 3 ; so that here also the writing is reduced to the setting down of the results. 120. Any one of the series in which x y andy z are constant, and have given values, may also be formed independently of any of the others; and although the labour of finding each value by the method now to be exemplified is greater than by the method just described, yet, since by this method we form only values that are im- mediately wanted, it may be advisable, in some cases, to resort to it, After what has been already shown > it is sufficient to give a few examples of the method referred to, which examples accordingly are hereto appended. 103 r 103 ^ 936613 100 L 2552/2 102] 255272 102 1447157 ioo J 075721 TOT n 075721 101 1598599 looj 036983 I00 , 036983 ioo V 672565 lOOj x y=o y z=o 522879 522879 jo.,-] 522879 x y=o y-z=i 522879 522879 loal 778151 x-y=z yz=2 522879 890855 103 ] 895265 x y=2o y-z=io 522879 928968 ioq"| 964676 103 \ 568637 103! 255272 255272 I02 -| 255272 103 > 823909 102 J 255272 255272 102 1 075721 ioo I 308999 98 J 255272 021995 I02 -j 995590 83 \ 416523 73 J 255272 005182 102 ] 004680 102 V 334453 102 J 075721 075721 101] 075721 102 I 410174 ioij 075721 075721 joi-i 036983 99 r 581856 97 J 075721 982415 IOI -, 002690 82 I 681657 72 J 075721 003463 ioi ] 004303 ioi \ 561616 ioij 036983 036983 KXO 036983 ioi [ 598599 iooj 036983 036983 I00 -j 021995 98 [ 642682 69 J 036983 995590 I00 -j 991062 81 I 765144 71 J 036983 006020 I00 , 003312 ioo I 672565 IOO J ioo I 694560 99 J 97 > 666317 95J 80 I 811459 70 J ioo 890855 8o 943633 7 ?76_971 100-80-70 811459 54 1.21. All the values formed in the first three of these examples will be formed in the type already given. Each series may be verified at any point, as shown in the margin, in regard to the last of them. 122. This mode of construction likewise admits of the application of cards. Three will obviously be necessary, similar to those repre- sented in figs. 2 and 3, but with the perforations larger or farther apart. 123. It will obviously be easy to apply the principles laid down to the formation of the values of functions in which four or any greater number of lives are concerned ; but it is unnecessary to go farther into the subject here. When so many as four lives are in question the number of different values of the functions will be so great as probably in all cases to prove a bar to attempting the formation of the whole. Any particular series wanted, therefore, will be found by the method last exemplified in the case of three lives, and either with or without the aid of perforated cards. 124. We have now to exemplify the construction of the same series when each of their terms is increased by the constant quantity log.v. (6.) To form all the different values of log.Vjp (xy y Values of xy o i 2 3 4 * * 9 103 IO2 IOI TOO 99 * * #=103 510042 522879 IO2 IOI IOO 99 98 * * #=IO2 765314 778151 IOI IOO 99 98 97 * * X=IOl 841035 853872 IOO 99 98 97 96 * * X=IOO 878017 890855 99 98 97 96 95 * * #=99 900013 912850 98 97 96 95 94 * * #=98 882428 895265 * * * * * * 032921 255272 543465 075721 694907 036983 768872 021995 812863 982415 777693 995590 288193 075721 619186 036983 731890 021995 790867 982415 795278 995590 773283 002690 363914 036983 656169 021995 753885 982415 773282 995590 790868 002690 775973 991062 400897 021995 678164 982415 736300 995590 768872 002690 793558 991062 767035 990454 422892 * * 660579 * * 731890 * * 771562 * * 784620 * * 757489 * * The only respect in which the operation here typified differs from that typified in (108), is that here the initial values in the several columns are the successive terms of the series* log.vp x , the formation of which is explained in (101). The addends are in every case the * This series being here used as corrected for the inaccuracy in the last figure of log.t? (105), no farther attention on this score is necessary. 55 same, so that the same set of cards may be employed in the construction; and the method of forming x y values for verification is also the same, of which, log.t? therefore, it is unnecessary to give an example. 125. The mode of forming independently a series 103-102 of values in which x y is constant, is likewise here in strict analogy with that described in (113) and (114). The only difference is, that in the formation now in question log.t? is included in the first addition. An example is given in the margin. This operation may be conducted by means of the cards, figs. 2 and 3. 126. (7.) To form all the different values of log.vp^ K} . Values of 102-101 987163 522879 778151 288193 255272 075721 619186 075721 036983 731890 036983 021995 790868 x y=o y-Z O I 2 3 4 * * z 103 102 101 100 99 * * #=103 y=i3 032921 522879 z 102 IOI IOO 99 98 * * #=IO2 y=i02 543465 778151 z IOI IOO 99 98 97 * * #=IOI y=ioi 694907 853872 z IOO 99 f 97 96 * * #=ioo y=ioo 768872 890855 z 99 98 97 96 95 * * *= 99 y=99 812863 912850 z 98 97 96 95 94 * * 37=98 y= 9 8 777693 895265 * * * * # * 555800 255272 321616 075721 548779 036983 659727 021995 725713 982415 672958 995590 611072 075721 397337 036983 585762 021995 681722 982415 708128 995590 668548 002690 886793 036983 434320 021995 607757 982415 664137 995590 703718 002690 671238 991062 923776 021995 456315 982415 590172 995590 6597271 002690 706408 991062 662300 990454 945771 * * 438730 * * 585762 * * 662417! * * 697470 * * 652754 * * x y=i ,-. O I 2 3 4 * * z 1 02 IOI IOO 99 98 * * #=103 y=i02 811072 255272 z IOI IOO 99 98 97 * * #=102 y=ioi 397337 075721 z IOO 99 98 97 96 * * #=IOT y=ioo 585762 036983 z 99 98 97 96 95 * * a?=ioo y= 99 681722 021995 z 98 97 96 95 94 * * *=99 y= 9 8 708128 982415 97 96 95 94 93 * * #=98 y=97 668548 995590 * * * * * * * 066344 075721 473058 036983 622745 021995 703717 982415 690543 995590 664138 002690 142065 036983 510041 021995 644740 982415 686132 995590 686133 002690 666828 991062 179048 021995 532036 982415 627155 995590 681722 002690 684412 991062 688823 991062 657890 990454 201043 982415 514451 995590 622745 002690 679885 990454 648344 994605 183458 * * 510041 * * 625435 * * 675474 * * 670339 * # 642949 * * y z o I 2 3 4 z 101 IOO 99 98 97 #=103 y=ioi 142065 075721 z TOO 99 98 97 96 #=IO2 y=ioo 510041 036983 z 99 98 97 96 95 56 xy- X=IOI y=99 644740 021995 -2 Z 9 8 97 96 95 94 r=ioo y= 9 8 686132 982415 z 97 96 95 94 93 #=99 y=97 686133 995590 z 96 95 94 93 92 #=98 y- 9 6l 666828 002690 217786 036983 547024 021995 666735 982415 668547 995590 681723 002690 669518 991062 254769 021995 569019 982415 649150 995590 664137 002690 684413 991062 660580 990454 2/6764 982415 551434 995590 644740 002690 666827 991062 675475 990454 651034 994605 259179 995590 547024 002690 647430 991062 657886 990454 665929 994605 645639 987667 254769 549714 638492 648343 660534 633306 This formation corresponds in every respect with that described and typified in (117), except that here the initial values in the several columns of the first compartment are the terms of the series log.vp^ ), in which x y = 0. The addends are the same, so that the cards, fig. 1, may be employed ; and the initial terms of the several columns in the successive compartments are found here, as in the former case, in each preceding compartment. 127. The mode of forming independently any series of these terms in which x y and y z are given and constant, is likewise the same as that described in (120) for the formation in like circumstances of a series of terms of log.p (x y ^ log.v being here included in the first addition. A few examples are given below. 987163 522879 522879 x y=o 987163 522879 522879 ioO 778151 y 2=2 987163 522879 890855 I03 -| 895265 y z=io 987163 522879 928968 Tft o 964676 103 f 555800 IQ3J 255272 255272 I02 -| 255272 103 > 811072 iQ2j 255272 255272 102 1 075721 ioo )> 296162 98J 255272 021995 102"] 995590 83 ^> 403686 73 J 255272 005182 102! 004680 102 J> 321616 I02j 075721 075721 I0 n 075721 102 !> 397337 ioij 075721 075721 I0 ri 036983 99 > 569019 97; 075721 982415 IOI -| 002690 82 S 668820 72j 075721 003463 IO P, 004303 ioi > 548779 loij 036983 036983 -, 036983 ioi }> 585762 iooj 036983 036983 irvr 021995 98 )> 629845 9^J 036983 995590 Tftrr) 991062 81 Y 752307 7i J 036983 006020 T - 003312 100 !> 659728 IOOJ 100 )> 681723 99J 97 }^ 653480 95J 80 *> 798622 7oJ 57 128. These values, like the others, admit of verifi- cation at any point of the series, as is here shown. The series formed in this manner require the usual correction for the inaccuracy in the last place of \og.v. 100- 129. (8.) To form all the values of log.ifav" 1 !)CP Values of Log.-IO^- 1 -!)^- 1 ^- 1). x-y v. 987163 loo 890855 80 943633 70 976971 80-70 798622 -I_L ^\ y 103 IO2 IOI IOO 99 * #=103 301030 301030 y 103 IO2 IOI IOO 99 * 823909 301030 y io3 IO2 IOI IOO 99 a?=ioi 602060 301030 y 103 IO2 IOI 100 99 * a?=ioo 455932 301030 y 103 IO2 IOI IOO 99 #=99 346787 301030 y 103 1 02 IOI IOO 99 * #=98 435728 301030 602060 823909 124939 823909 903090 823909 756962 823909 647817 823909 736758 823909 425969 954242 948848 954242 726999 954242 580871 954242 471726 954242 560667 954242 380211 978811 903090 978811 681241 978811 535113 978811 425968 978811 514909 978811 359022 987765 881901 987765 660052 987765 513924 987765 404779 987765 493720 987765 346787 * 869666 * 647817 501689 * 392544 481485 * The foregoing type shows the mode of formation here. It differs, it will be observed, from those in (108) and (124), inasmuch as in the present case the two series, the terms of which have to be com- bined, being essentially distinct, each value of x has to be united with each value of y t and the terms in which x y is constant are found here ranged, not in horizontal lines, but in diagonally descend- ing lines. The initial values in the several columns are the terms of the series log.^/" 1 -1) ; the first addend in each column is log. iCP -1 + 1) for the greatest value of y for which this function sub- sists; and the remaining addends are the terms of the series Alog.J (p y ~ l + 1). These terms being put upon a set of cards similar to that represented in fig. 1, the operation may obviously be performed by means of them, in the manner already described, (1 12.) 130. Values for verification may be formed as in i_ the margin. Taking any value in the first column 2 for an initial term, and adding to it continually the terms of the series Alog.^- 1 1), commencing with that in which x is the same as in the initial term, we produce in. succession the terms extending horizontally across the columns. This, too, can be performed by means of a card, having upon it A log. (p x ~ l 1), and it may be verified from time to time, as shown. 131. The values of the function now under con- a? 103 IO2 IOI IOO 346787 522879 869666 778151 647817 853872 501689 Verification, loo 455932 99 045757 501689 sideration may also be formed in a somewhat different I00 '99 manner. Examples of the mode of formation now referred to follow. 58 Values of I. x7 y x-y y 103 102 101 IOO I 9 #=103 301030 301030 y IO2 101 IOO 99 2 s X=IO2 823909 124939 " 101 IOO 99 98 y EIOI 1060 w/JlSl y IOO 99 98 97 2 s a?=ioo 455932 057992 y 99 98 97 96 95 #=99 346787 045757 y 9 8 97 96 95 94 #=98 435728 055517 602060 82390.9 948848 954242 681241 9/8811 513924 987765 392544 009760 491245 002475 425969 954242 903090 978811 660052 987765 501689 009760 402304 002475 493720 998489 380211 978811 881901 987765 647817 009760 511449 002475 404779 998489 492209 005037 359022 987765 869666 009760 657577 002475 513924 998489 403268 005037 497246 005429 346/87 * 879426 * 660052 * 512413 408305 502675 II. x y. yX I 2 3 4 * X 103 102 IOI 99 ^ y=I03 602060 522879 X 102 IOI IOO 99 f y=iO2 948848 778151 X IOI IOO 99 98 * 97 y=ioi 681241 853872 X IOO 99 98 97 ? 6 y=ioo 513924 890855 X 99 98 97 96 % y=99 392544 088941 X 98 97 96 95 9 * 4 y=9%\ 491245: 020204 124939 778151 726999 853872 535113 890855 404779 088941 481485 020204 511449 987765: 903090 853872 580871 890855 425968 088941 493720 020204 501689 987765 499214 1 039673 756962 890855 471726 088941 514909 020204 513924 987765 489454 039673 538887 039509 647817 * 560667 * 535113 * 501689 * 529127 # 578396 * 132. Few remarks on this mode of formation seem to be required. The values are formed in two compartments, the first comprising those values in which x is equal to or greater than y, and the second those in which x is equal to or less than y. The initial values in the second compartment are the values in the first corresponding to x y ^j and the addends are, in the first compartment, the terms of the series Alog.K^" 1 + 1), and in the second the terms of the series A log. (/?,,." * 1). The terms in which x y is constant are now- found ranged in horizontal lines. The method of forming values for verification will be sufficiently apparent, without Log. example, after what has been already shown. fm 133. Any series in which x y is constant may also be formed independently. A single example is given in the margin. The two addends for the formation of each succeeding value are the diffe- rences of the terms of the individual series which compose the preceding value. The values here formed may be compared with the corresponding values in the type of (131). Having now shown the mode of formation of the various subsidiary series for which we shall 100-96 512413 have occasion, we proceed in the following chapters to show their applications and uses. 103 99 103-99 102*98 101-97 301030 045757 346787 522879 009760 8/9426 778151 002475 660052 85387-2 998489 CHAPTER V. OF MEAN DURATIONS OF LIFE, AND PROBABILITIES OF SURVIVORSHIP. PROBLEM XL 134. To construct a table of the curtate mean duration of a single life, or of a combination of two or more joint lives, at each age. 135. By the mean duration of life at a specified age and according to a given table of mortality, is implied, the average number of years that, in the case of a single life, will be enjoyed by each individual of the specified age ; and, in the case of a combination of lives, by each combination, the ages of the lives composing which are the same as the ages of those composing the combination in question, on the sup- position that the lives fail as indicated in the given table. In other words, the mean duration is the term that would result from dividing equally among a number of persons of the same age, or of combina- tions similarly circumstanced as to the ages of the persons composing them, the sum of the whole future life-times of those persons or com- binations respectively. 136. It is the complete mean duration that has just been defined. The curtate mean duration is the duration which arises when we neg- lect the portion of time which each life, or combination of lives, enjoys in the year in which its failure takes place ; that is to say, it is the mean duration which would result if the deaths of each year, instead of being distributed over it at intervals, were to take place at the beginning of that year. Hence the reason of the function being called curtate. 137. Of l x individuals, the tabular number alive at age x, which suppose the present age,- l x+n survive n years, having been reduced to their then present number a year before ; l x+n consequently is the number of years of existence that will be enjoyed in the nth year from 60 the present time, by the survivors of the l x individuals now alive ; and hence the share of each, in respect of this year, will be ~=p xn . X Making n, therefore, in this expression equal to 1, 2, 3, &c., suc- cessively, and adding the results, we have, denoting the curtate mean duration of (x) by e l x , I 1 +/ _i_j + l z+I ' g+2 ' x+3 ' e x == 7~ > x or 138. Again, if a combination of two lives, of the respective ages of x and y, be in question, l x and l y , the tabular numbers alive at those ages, afford l xy of such combinations, since each of the l x may be com- bined with each of the / to form one. Of these combinations l x+H1+n subsist at the end of n years, having enjoyed amongst them, during the nth year, l x+ny+n years. Hence the share of existence due to each of the l xy combinations, in respect of the nth year, will be ^+n.y+n_ ~l -P(x.y)n' V x.y Consequently, making n successively equal to 1, 2, 3, &c., and adding the results, we have for the curtate mean duration of a pair of lives, (x} and (y\ _L x -y~ or 139. And in like manner we should find for the curtate mean dura- tion of three lives, (x), (y), and (z). e \ L K x.y.z- or and so on, for a combination consisting of any number of lives what- soever. By the aid of these expressions the curtate mean duration of any single life, or any combination of joint lives, may be determined. But they are unsuited to our present purpose, which is to show how, by a continuous process, a table may be formed of the curtate mean dura- tion of a single life at each age, or of every combination of joint lives in which the differences of the ages of the lives composing it are the same. 140. By the hypothesis on which we now proceed, the l x who attain 61 age x are immediately thereafter reduced by death to l x+lt which num- ber attain the age x+I. Each has then a curtate mean duration of e l x+l , and they consequently have amongst them a total duration of l x+l e l x+l , which, therefore, is the quantity of existence due to the l x individuals in respect of all the years after the first. And the quantity in respect of the first year being l x+l , (137,) we have for the whole quantity of existence to be enjoyed by the l x individuals from and after age x, l x+l + l x+l e l x+l , or, 1,+ ^l + e 1 ^). Hence, dividing by l x , we have finally for the share of each, 141. In a similar manner we should deduce for a combination of two lives, (x) and (y) } and for a combination of three lives (x), (y], and (z), 142. By these formulae it is obvious that, if the curtate mean dura- tion at any age, whether of a single life, or of a combination of any number of joint lives, be known, the durations at all the younger ages of single lives, or of combinations of the same number of joint lives, may be successively deduced ; by the term younger age, in the case of a combination of lives, it being understood, not only that the lives composing that combination are respectively younger than those com- posing the combination with which it is compared, but that they have amongst themselves the same arithmetical relation as to difference. 143. Passing to logarithms the formulae just deduced become log.e l x =\og.p +\og.(l +e l x+l ) ; The applicability of Table I. to these formula is obvious. 144. Initial values are found as follows : In the case of a single life we have obviously, using the Carlisle Table, ^ 1 104| : =0. Let there- fore x 103. Hence, 145. And in like manner, in the case of a combination of any num- ber of joint lives, when one of those lives is of the oldest tabular age, the curtate mean duration for that combination is equal to 0, and for the next younger combination it is equal to the probability that all the lives composing that combination will survive a year. 146. We now introduce the following examples : One Life. 62 Curtate Mean Duration. Two Lives. io 3 522879 -33333 778151 0-477121 602044 16 x y=o. I03 J045758 -mil 03 -J 556302 0-954242 999962 38 a? y=i. * 3 } 301030 -20000 32 J 632023 0-698970 778093 58 102 903090 -Soooo 853872 096910 352177 5 ioi 109144 1-28571 890855 358997 25 100 249877 1-77778 912850 443648 49 l 2 \ 602060 -40000 102 J 707744 397940 544039 29 [-853872 -71429 J 781710 146128 380195 16 ^71 1204 -51429 101 J 744727 288796 468940 63 101 } 924934 -84127 100 J 803705 075066 340147 36 J^} 015793 1-03703 825700 308951 47 99 [134698 1-36363 '}068822 1-17172 808115 336791 12 99 1 144918 1-39610 99 356547 2-27273 895265 514877 32 790530 373524 56 786120 379495 11 9 [165626 1*46429 98 410174 2-57142 9g} 164110 1-45918 Three Lives. X y Q , y-z=o. I0 3] 103 [668637 '03704 103] 334453 1-431363 447097 102 1 60 x y=i. y *=i. I0 3~l ml 154908 -14286 ioi J 522878 0-845098 903004 102 1 86 * jr=3. y 2=2. T 3l 100 ^308999 -20370 98 J 581856 0-691001 771520 102 "I 1 102 }> 350247 -22400 102 J 561616 0-649753 737491 TOT -I 43 ioi 1680870 -3809(5 100 J 657577 419130 559287 Tnr-| 22 99 j. 662376 -45960 97 J 642682 337624 501840 idil 101 U49397 '44606 IOT J 672565 350603 510788 100] 100 ^797756 -62771 99 J 698970 202244 413793 100 1 27 98 1806915 -64108 96] 66631 7 193085 408164 100 1 i oo^ 832752 -68038 100 J 738550 167248 392627 991 29 99 \ 910546 -81385 98 J 698970 089454 348026 991 3 97 !> 881448 -76111 95] 681456 118552 364309 991 3 99 1963958 -92036 99 J 685795 036042 319403 9 81 _ 22 98}* 957572 -90693 97 J 679665 042428 322747 98-1 15 96 1927243 -84575 94 J 649538 072757 338899 98 1 31 98V969178 -93149 98 J 97 1969999 -91201 95 [916711 -82359 93 J 63 147. The operation is in all the examples precisely the same, and the mode of conducting it will be best explained by reference to the following type : D! negative. Dj positive. i lS-^ + i e \ K x + l D, tosA + , el *+i A 1()2*.W ar.co.D, , o * x 102T-2? B C JT^ar.co.DJ B C KM D (=cr +c ^ D rA+B + C ... The type exhibits two modes of operation, the first, in accordance with Formula IX., for use while e l x+l continues less than unity, and its loga- rithm consequently negative, (which will never be for more than a few terms ;) and the second, in accordance with Formula V., for use when e l x+ 1 becomes greater than unity, and its logarithm consequently posi- tive. In the examples in which the operation changes from the one formula to the other, the point where the change takes place is indi- cated by a dark line. The values of log.^ that come into use in the first example are taken from the Elementary Table, and those of log. P(xy)> anc ^ ^&P(kfjd ^ n ^ ne ther examples, will be found in the types of formation in (108) and (117). 148. The operation for a single life may be verified at any point by the aid of the expression, (137,) e i __+ g . to apply which to age 98, we have I _ K ~ + ^109+ I 102 103 11 + 9+7 + 5 + 3 + 1 14 log.!8 = l-255273 7=0-845098 36 14 18 7* 0-410175, which agrees with the value already found. The analogous mode of verifying the operations for joint lives is too laborious for use. PROBLEM XII. 149. To construct a table of the complete mean duration of a single life at each age. 64 150. The mean duration of life at a given age, called complete when necessary to distinguish it from curtate, is the average duration of all the lives at that age, according to the mortality table, on the supposition that the deaths of each year are uniformly distributed over that year. 151. A little consideration suffices to show that the complete mean duration of a single life at any age will exceed the curtate mean duration at the same age by half a year ; since, the deaths being here supposed uniformly distributed over each year, each life will in consequence enjoy half a year of existence, on an average, in the year in which it fails. When, therefore, the curtate mean duration at any age is known, the complete mean duration at that age will be obtained by adding '5 to the former function. But the complete mean duration for all ages may also be computed independently, and by a continuous process, and the two operations may be made mutually to confirm each other. 152. We saw that, on the hypothesis of the last problem, the por- tion of existence due to l x individuals now alive, in respect of the rath year, is l x+n years, l x+H being the number, out of the l x now alive, who live over that year. But, on the hypothesis of the present problem, l x+n _ l l x + n > the number who die in the nth year, also enjoy in that year half a year each, or on the whole, i(( r+tt _ 1 l x+n ) years. Adding this to the former therefore, we have | (( e+B _ l + l x+n ) for the portion of existence due to the /,,. individuals in respect of the nth year, on the present hypothesis ; and division of this by l x) gives for the share of each, *(*+H-I + *+J t Finally, making n here equal to 1, 2, 3, &c., suc- cessively, and adding the results, we have, if e x denote the complete mean duration at age #, or 153. The working formula is deduced as follows: Of l x now alive l x+l survive one year, and have then a mean duration of e x+l , and therefore a total duration of l x+ i^ x+r This consequently is the portion of existence due to the l x in respect of all the years after the first. And the portion due to them in respect of the first year being duration \(l x + l x+l ) + ^+1^+1 J an( l dividing by l x , we have finally, for the share of each, 4(*. + ln)+*.H.A+. 65 Passing to logarithms this becomes, which is the formula required. 154. The initial value for the construction of the table will be, obviously, Iog.e 104 = log. J =1-698970; and \og.(p f -i + I) for each age being given in the Elementary Table, the operation will be as here typified : A 7 E r AzE r A B C D A) T^ar.co.^-A)] E A+B + C + E The type here, like that in last problem, consists of two portions, of which the first, (that on the left,) shows the operation when the value in the line A exceeds that in the line Ej ; and the other shows the ope- ration when this relation of the values in A and E L is reversed. The operations change Complete Mean Duration. 104 One Life. 698970 from the first to the second after a very few values have been formed. 155. An example in illustration is here given, and the values formed may be com- pared with those for the same ages in the first example of last problem. 156. If it were assumed in the case of com- binations of joint lives that the failures of each year are uniformly distributed over that year, so as to take place at equal intervals therein, then it is evident that, as in the case of single lives, the complete mean duration of each such combination would be obtained by adding A to its curtate mean duration. But I01 251811 r 7 8 57 2 301030 522879 397940 698970 103 920819 124939 778151 795880 414973 113943 079181 853872 318726 32 102 500000 0-602060 833333 204120 1-30000 034762 66 ioi 251811 057992 890S55 408652 12 100 357511 045757 912850 484264 36 99 442907 055517 895265 536495 64 98 487341 * * 1-78572 193819 2-27778 311754 2-77273 387390 such an assumption is inadmissible. It is incompatible with that more rational assump- tion of a uniform distribution of the indivi- dual deaths of each year. This will readily appear when it is considered that the number of pairs, for example, dissolved by the death of one individual of either of the ages which enter into those pairs, is equal to the number of survivors of the other age. And hence, the survivors being more numerous at the beginning of the year than at the end, a death which takes place towards the commencement of the year dissolves more pairs than one that takes place later in the year. It is proposed here to investigate an expression for the complete mean duration of two lives, (a?) and (y). 157. The numbers now alive of the specified ages are denoted, as usual, by l x and l y . But, for convenience, we here employ a and a 1 to denote the numbers who out of these survive the nth year, and d and d l the numbers who die therein, respectively. Now let the nth year be divided into t equal parts ; then, the deaths being uniformly distributed, those of the two classes that take place in each tth part will be and , respectively. Also, let the deaths of each tth part V t take place at the beginning of that part ; then will the quantity of existence, in tth parts of a year, due to the pairs of lives of the speci- fied ages, now subsisting, in respect of any one of the tth parts, be the same as the number of pairs who survive that part. Take the pth in order of the tth parts. The survivors at the end of it will obviously t ~~ J) t 2? be, of the one class, a-\ -- -d, and of the other, a l + d l ; and t/ b these give, of pairs then surviving, Hence, dividing by t, we have, for the quantity of existence, in years, due in respect of the pth in order of the t parts into which the ^th year is divided. 67 Making /?=!, 2, 3, . . . t, successively, we have, = 2, p =t-i afl i + ir -\_ o o 2 aa l + -(ad l +a l d) + - And addition of these gives, ( since or for the quantity of existence due in respect of the whole of the parts into which the nth year is divided, when the deaths take place in the manner supposed, that is, the deaths of each part at the commence- ment of that part. But to assimilate this hypothesis to that of a perfectly uniform and equable distribution of the deaths, it is requisite that the parts be indefinitely small, or, which is the same thing, that their number be indefinitely great. Increasing t without limit then, we have, - -- 1 ) , -=J 5 and hence the expression, which will now denote the quantity of existence due in respect of the nth year, becomes aa l + \(ad l + Substituting now in this expression, multiplying out, collecting the terms, and dividing the whole by l xy , the number of pairs now subsisting, we have for the share of existence due to each of those pairs, in respect of the nth year, 3 x+n-l.y + nl *"$ x+n-l.y+n~* Ti'x+n.y + u- 68 By making n in this expression equal to 1, 2, 3, ... successively, and adding the results, we shall obtain the complete mean duration of a pair of lives, whose ages are x and y } respectively. l x.y-\ Py-l Hence the required sum is or 158. It thus appears that if tables of the curtate mean duration of pairs of lives of all ages have been formed, the complete mean duration of any pair that may be proposed can be assigned ; but that the excess of the complete over the curtate mean duration is not here, as in the case of single lives of all ages, a constant quantity. Neither can a formula be devised for the commodious computation, by a continuous process, of the values of this function for pairs of ages having the same common difference. Any value wanted must therefore be computed by the formula just deduced. 159. SCHOLIUM I. The preceding investigation, seemingly some- what out of place in such a work as the present, has been given here because it is not generally accessible. The only writer who has attended to the subject is Mr. Griffith Davies, who in a yet uncompleted work on Assurances*, solves not only the present problem, but also the general problem, in which the number of lives in each combination is any whatsoever. Mr. Davies' solutions however, although correct in their results, are rendered obscure by the employment of the symbol x " of a year " to denote, not mih parts, in number x, but the #th in Vfl order of those parts. They are likewise otherwise objectionable, in * The sheets of Mr. Davies' work, so far as printed, being obtainable at a fixed price, it must, although incomplete, be held as published. Otherwise the direct- ing of attention to it, as is done in the text, would perhaps be hardly legitimate. 69 that he assumes a definite relation as subsisting between two quantities, whereof one is finite and the other infinite. Mr. D's. general method of investigation has been here followed. 160. Mr. Milne appears to have fairly evaded this subject. At p. 71 of his work he employs (f> to denote the excess of the true over the curtate mean duration of a pair of lives ; but he nowhere seeks to assign the value of <. Nor, as has just been stated, does any other writer, with the exception of Mr. Davies. 161. SCHOLIUM II. The function with the consideration of which we have been occupied, is that which usually receives the appellation of the expectation of life. This appellation it seems to have derived from its being the sum of the probabilities of the life or combination of lives that may be in question, living over one year, two years, three years, &c., to the greatest tabular duration of that life or combination of lives (137,138). Viewed in this light as the sum of a series of probabilities the function may, perhaps, with some show of propriety receive the appellation to which reference has just been made. But the sense in which the term expectation is frequently received, and the manner in which the function it designates is spoken of, and even defined, by writers on life contingencies, receive no countenance from the nature or the mode of derivation of that function. 162. Of the prevalent misconceptions on this subject one is, that the " expectation " at a specified age, considered as a term of years, is more likely than any other term, to be the actual duration of that life ; and another is, that it denotes a term of years which the life in ques- tion is as likely to survive as not. Neither of these notions is correct. The first would imply that the year in which a life is most likely to fail is that in which its " expectation " terminates. But the year in which this event is most likely to happen is obviously that succeeding the attainment of the age opposite which the mortality table shows the greatest number of deaths. Thus, by the Carlisle Table, after the 4th year, more deaths take place in the 75th year than in any other. In this year, therefore, a life of any age, from 4 to 74 inclusive, is, by this table, more likely to fail than in any other single year that can be named ; while the actual expectations of but few of those intermediate ages will be found to terminate in their 75th year. 163. The second notion designates, not the "expectation," but the term, (called by French writers la vie probable,) during which the number of lives of the given age is reduced one half. This term does not usually differ much from the true " expectation," and on De Moivre's hypothesis, of a uniform distribution of the deaths, from amongst the number living at a given age, over the whole period of 70 future existence, it actually coincides with it. Still, as this hypothesis is in accordance with no table exhibiting the results of actual observa- tions, deductions from it cannot be received as true exponents of the law of mortality. 164. These and other notions equally unfounded, which are enter- tained by many in reference to the mean duration of life, have no doubt their origin in the name, " expectation of life," by which this function is usually designated, and in the manner in which it is spoken of by writers on the subject. We propose briefly to advert to a few of the statements here referred to. 165. Thomas Simpson, in his " Supplement to the Doctrine of Annuities," &c., 1791, 8vo., pp. 7 and 19, defines the mean duration as (e the number of years of life which a person of a given age may, upon an equality of chance, expect to enjoy ;" but, on the page last mentioned, he subjoins a note, warning his readers against taking this definition in its obvious and grammatical meaning, because its real meaning is something else ! Surely a preferable course had been to avoid the employment of language confessedly suggestive of erroneous ideas. 166. Mr. Milne, whose general accuracy and precision are worthy of all praise and imitation, is far from being faultless in this matter. He says of the mean duration at a specified age, p. 57, that it is "the whole time which each of [those alive at that age] may at present reasonably expect to survive" It is certainly true of the mean dura- tion that the probability of surviving it,and consequently the reason- ableness of expecting to do so, is greater than that of surviving a longer term ; but as the same thing can be predicated of any term of years whatsoever, Mr. Milne ought to have assigned the grounds on which he claims for this particular term the appellation of the term of reasonable expectation. It is assuredly more reasonable to expect to survive any shorter term. 167. If the appellation now animadverted on has any definite sig- nification, it must mean that it is not reasonable to expect to enjoy any portion of existence after the expiry of the term to which it is applied. Mr. Milne, nevertheless, speaks of another term of years, which he calls the deferred expectation of life, pp. 57, 58, and de- scribes as " the duration of life which [a person of a specified age] has at present the expectation that he shall enjoy after the expiration of t years;" which term in every case extends beyond that of the mean duration, and in some, according to the value given to t, does not even commence till the mean duration the term of reasonable expectation has expired ! 71 168. It is surely unnecessary to add much more to what has already been said on this subject. To make the matter, however, if possible, still more plain, we take a single illustration. Suppose that an urn contain n balls, marked with the numbers, 1, 2, 3, .... n, respec- tively, and that the balls are to be apportioned, by a person blind- folded, amongst n individuals, one ball to each. Now it is plain that, before the drawing commences, the expectations of all the n indivi- duals in regard to the result of the drawing are, or ought to be, the same. It would be absurd, therefore, to fix upon any one ball, and to say of the number upon that ball, that it is the number which not merely one of the n individuals, but all of them, may reasonably ex- pect to fall to their lot. It matters nothing that the number thus n + \ fixed upon is the average number, , since, by hypothes is, the numbers being all equally likely, any other number is just as likely, and therefore may as reasonably be expected, as that number. 169. The case supposed is parallel to that presented by the mor- tality table; and it is just as absurd to say that the average' duration of lives aged x, is the term which each of those lives may reasonably expect to enjoy, as to say that the average value of the numbers on the balls is the number which each of the supposed individuals may reasonably expect will fall to his lot. Nay, it is more absurd, for while it can be said of the n individuals that each is as likely to ex- ceed as to fall short of the average number, , the like cannot be A said of the lives aged x, in regard to the average duration of life. The term in regard to which this can be said, is not the mean duration, but the vie probable. 170. A more recent writer than Mr. Milne defines the mean dura- tion of life as " the number of years which lives of any given age, taken one with another, have an equal chance of attaining." (For " attaining " read " surviving." Lives attain, not years, but ages.) The writer's meaning is not clear. One interpretation of his words is, that the mean duration at a given age is a number of years which all the lives of that age have the same probability of surviving. This, of course, does not describe the mean duration. It applies to any num- ber of years whatsoever, the principle upon which the mortality table is subjected to calculation being, that all lives of the same age are simi- larly circumstanced in regard to probability of longevity. It is likely therefore, (and the likelihood is increased by the employment of the 72 ambiguous term, "equal chance/'*) that the author wished to say, that the mean duration of lives of a given age is the term which each of those lives is as likely to survive as not. This also, however, is in- correct. It describes the vie probable, and not the mean duration. 171. Another recent writer says, that " the expectation of life is often confounded with the chance of living an equivalent number of years." It seems probable that the meaning here intended to be con- veyed is, that the mean duration, at a specified age, is often confounded with the term which lives of that age are as likely to survive as not (162). For it cannot be supposed that any would be so absurd as to con- found a term of ten, twenty, or thirty years, as the case may be, with a chance a probability an abstract number, whose greater limit is unity. 172. The same writer elsewhere says : " At the earlier ages there is always a chance of outliving the period of years represented by the expectation of life ; but the converse is the case for the older ages." Here too it is obvious that the writer cannot mean what he says, since a life of any age whatsoever has a definite and assignable chance of attaining even the oldest tabular age, and therefore of outliving the term of its mean duration. The idea intended to be conveyed is ap- parently this, that lives of the younger ages are more likely to exceed than to fall short of their mean duration, while the reverse is the case with regard to lives of the older ages. These are examples of that vagueness and lack of precision which, in scientific works especi- ally, often prove serious stumbling-blocks to the learner, and which therefore ought to be studiously avoided. 173. See, on the subject of this scholium, Price on Reversionary Payments, vol. ii., pp. 4 7, 6th or 7th edition. Also, Encyclo- paedia Metropolitana, art. THEORY OF PROBABILITIES, sec. 101, p. 445 ; and Sixth Report of the Registrar- General, Appendix, pp. 536, 554, 557, 8vo. edition, and pp. 301, 302, 307, 314, folio edition. PROBLEM XIII. 174. To construct a table of the probabilities of survivorship be- tween two lives, for every combination of ages. 175. By the probabilities of survivorship of any number of lives are meant, the probabilities of the different orders of survivorship that can take place amongst those lives. When two lives only are in question, the number of orders of survivorship is obviously also two. There are * The propriety of the use of this term in any particular case may generally be tested by examining whether the connection furnishes an answer to the query, Equal to what ? Try this upon the definition now under consideration. 73 hence two values connected with each combination of two lives, the one indicating the probability of the dissolution of the combination by the failure of the older life, and the other the probability of the same by the failure of the younger life. The sum of these corresponding probabilities is in every case equal to unity, since the combination must be dissolved by the failure of one or other of the lives. Hence if one of these probabilities be determined the other will be found by sub- tracting the first from unity (81). In forming a table, however, it may be desirable to compute both probabilities independently of each other, to serve for mutual verification. 176. Let (SB) and (y} be any two lives, and let the probability to be determined be, that of these two (x) will be the first that fails ; that is, that the combination (x.y} will be dissolved by the death of (x). This probability in regard to a single year, the nth, has been already determined (99) ; and by making n, in the expression for that proba- bility, successively equal to 1, 2, 3, &c., to the greatest tabular joint duration of (x.y}, and adding the results, we should have an expression denoting the probability required. We prefer, however, first deducing a working formula, that is, a formula expressing the value of this pro- bability in respect of (x.y}, in terms of the like probability in respect of (ar + l.y+1). 177. Let, then, these probabilities be denoted by S^, and Sg+i.y+i' respectively. The combination (x.y) may be dissolved by the death of (%}, either in the first year or after that year ; and the sum of the probabilities in respect of these portions of time will obviously be the total probability required (83). That this disso- lution will take place after the first year depends on the concurrence of these two events ; first, that no dissolution take place during the first year, that is, that both lives survive that year, the probability of which isp^y) ; and, secondly, that a combination of the ages attained at the end of the first year, namely, (x + \.y+ 1), will be dissolved by the death of (x+l), the probability of which is S g * ly+1 . Hence (82), the probability required in respect of the period after the first year is fe. y )S g | Ly+1 And the probability in respect of the rctli year being, (99,) if we make n \ we get for that in respect of the first year, 4(i-jg(i+ig. Hence the total probability required is, or, in logarithms, log.SL.=log. Pr , 74 178. This is the formula required, of which it may be remarked generally, that the formation of log.i(/y~*~~ \)(p y ~ l -fl) for each combination of ages having been already shown, (129 . . . 131), and log.S, r+1;+1 being in each case the result of the preceding operation, the formation of the logarithm to be added to log./^ j (also known) is effected by means of Table I. This will be distinctly seen in the type of the operation to be immediately given. 179. To find initial values, take the expression in its first algebraic form : 1st. Let #=y. Then, when (a?) and (y) are of the oldest tabular age, p x , p y) and jo^) obviously vanish, and the expression reduces to the logarithm of which, 1*698970, is in this case the initial value. 2nd. Let x 7 y. Then, when x is the oldest tabular age, p x and P(xy) vanish, so that the expression in this case becomes,, or, in logarithms, which will readily be obtained from the Elementary Table. 3rd. Let x L y. Then, when y is the oldest tabular age, p y and p (xy ) vanish, and the expression is reduced to or, in logarithms, which also may be formed by the aid of the Elementary Table. 180. When an entire table of the probabilities of survivorship of two lives is to be constructed, the initial values for the different com- partments may be formed as follows : Probability that (x Initial 522879 301030 823909 255272 823909 903090 075721 954242 933053 036983 978811 104-100 948847 I04T03 104*102 io4'ioi ) will die before (y) Values. zy. log.* log^oa 698970 522879 301030- 103-104 102*104 101-104 ioo'i04 5228/9 255272 522879 301030 075721 778151 154902 036983 853872 045757 75 It will be observed that the differences by the addition of which each value is here successively formed, are those of the terms whose sum is the immediately preceding value. 181. We now give a type explanatory of the operations. E, A B C D E T 1 [ar.co.(E 1 -A)] Sri- A) E l7 A. E, A B C D E rA+B + C + D E,-A fe And further illustration will be afforded by the following examples. Probability that (x) will die before (y). I. x=or 7 y. x-y 698970 602060 045758 096910 954242 698970 948848 556302 750122 443698 698970 =o. 0-903090 2498/8 103 x y=i. 823909 -666667 425969 301030 397940 698970 0-602060 666667 079181 628571 823909 903090 632023 920819 342423 798355 x y=: 903090 380211 376751 522879 602060 800000 0-477121 761905 000000 881901 669006 301030 851937 '711110 76 681241 707744 309970 15 017729 185046 306425 \l} 798355 660052 744727 3/5662 2 628571 138303 603174 278754 585860 365489 538960 200000 0-602060 238095 204120 288888 034762 324674 017728 388888 088134 449494 102 } 851937 204120 675323 318063 6m 10 381340 550504 142857 0-602066 185185 204120 236364 141329 316327 013789 388888 100370 446639 647817 766722 414961 12 Jj:} 698970 100 } 780443 } 829512 513924 781710 403307 28 } 698969 501689 803705 462363 36 " J 511449 786120 488508 42 ^} 767793 }786119 392544 825700 480709 17 402304 808115 521077 61 404779 803705 532248 28 99 | 740760 J"} 164902 99 1 698970 y x=l. 3 L 522879 "333333 124939 0-602060 301030 397940 698970 99 1 731557 II. XA 2 \ 301030 903090 376751 397940 698970 ' 756962 413/34 397940 698970 ;~}267606 471726 691001 795880 414973 102 1 522879 "333333 204120 371428 034762 396824 193819 414141 135663 461039 J*} 376751 103 ^726999 632023 795880 414973 580871 669006 795880 414973 101 1 569875 1021 535113 744727 318726 32 *j 460730 425968 766722 318726 32 ,99)373580 J 514909 749137 858671 377418 1598598 T 99 1 51 1448 9 8 1500135 404779 803705 408652 12 493720 786120 309970 14 513924 781710 986211 307979 ,} 617148 9%\ 589824 971 589824 489454 806395 354069 39 481485 808115 374101 501690 803705 347310 19 9 8 } 663738 97J652724 96} 649957 182. When x=y we see that we have, in every case, (within narrow limits,) 698970, which is the logarithm of J, for the required value. This we obviously ought to have, and it is satisfactory to find that the operation gives it. With regard to the cases in which x and y are unequal, it has been already remarked (175), that the sum of 77 every two corresponding values, that is, values in which x and y are interchanged, ought to be equal to unity. This too will be seen to hold. Thus :- Diff. i. 666667 '333333 roooooo '999999 Diff. 2. 104*103 103-104 IO2-IOI 101*102 628571 371428 538960 461039 roooooo 104*102 102*104 800000 '200000 roooooo 101-99 99'ioi 675323 324675 99*97 97'99 550504 449494 999998 999998 And in this way the operations, if carried on simultaneously, may be verified from time to time. 183. This function may also be expressed in terms of the curtate mean durations of pairs of lives. If, in the expression in (99), which denotes the probability of survivorship in respect of the nth year, n be made equal to 1, 2, 3, &c., successively, and the results added in the manner of (157), we obtain for the total probability, '6* e> Px-i Py-i As a formula of verification this expression, with existing tables, is almost useless. The mean duration is never given to more than two decimal places. The consequence is that, e l x _ ll and e l xi _ l being necessarily nearly equal, their difference will seldom consist of more than two significant figures, and this therefore will be the utmost extent to which a probability of survivorship, deduced by this formula, can be relied on, as matters now stand. CHAPTER VI. OF ANNUITIES AND ASSURANCES ON LIVES. 184. BY a Contingent Benefit (or, simply, a Benefit,) is meant a payment to be made, either periodically or once for all, in accordance with previously stipulated conditions, as to the subsistence or non- subsistence, at the period or periods of payment, of the life or lives on which the payment depends. In accordance with this definition it is obvious, that the present value of a benefit, in respect of any one year of existence, is equal to the present value of the sum that may be re- ceived in that year, multiplied by the probability of its being received, (78) ; and hence the whole present value is equal to the sum of those partial values in respect of each year of the possible future existence of the life or lives concerned. 185. Thus, an annuity of 1. upon (x) being a payment of 1. to be made at the end of each year at which the individual so designated shall be alive, its present value is, and in like manner the present value of an annuity upon two lives, (#) and (y} } which is payable at the end of each year at which both lives are in existence, is, So also, an assurance of 1. upon (a?), being a payment of }.. to be made at the end of the year in which the life of (a?) fails, its present value is, (95), and if the assurance be upon the joint duration of the two lives (x) and (y), its present value will be, (96), and so on. 186. These series will consist of as many terms as there arc years in which a payment of the respective benefits may be received ; so that, if these are to last the whole of life, the annuity series will con- sist, in the case of a single life, of as many terms as there are years in 79 the tabular remainder of lives of the same age as that life, and in the case of two or more joint lives, of as many terms as there are years in the tabular remainder of lives of the same age as the oldest of the specified lives ; and the assurance series will consist of one term more than these respectively, since the failure, which entitles to the receipt of the benefit, may not take place till the year after the attainment by the single life, or the oldest of the joint lives, of the greatest tabular age. 187. If the number of years that the benefits are to last be less than the greatest tabular duration of the life or lives on which they are constituted, say for n years, the series expressing their present values will, in all cases, consist of n terms only, the terms beyond the nth vanishing, in consequence of the vanishing of v for those years to which they respectively belong. 188. And in short, to whatsoever years, during the possible dura- tion of the life or lives on which it depends, the duration of a benefit may be restricted, the present value of that benefit will be the sum of those terms of the series expressing its value for the whole of life, which belong to the years to which its duration is restricted. 189. It thus appears that to compute directly the present value of a benefit, the numerical values of as many terms as there are years in the duration of the benefit must be computed ; and if these are nu- merous, the labour of the computation will obviously be considerable. And if a table had to be formed in this way, exhibiting the value of even one benefit for but a single life of each age, not to speak of com- binations of lives, the labour would be altogether intolerable. This is avoided, however, by adopting the continuous method of computation, of which examples have already been given in previous problems. The application of this method is facilitated by the Lemma which will presently be given ; but, in the mean time, the principle of the notation to be employed must be briefly explained. 190. A distinct letter will be appropriated to denote each kind of benefit, the age of the life or lives on which it depends being attached as a suffix; and the portion of existence to which its duration is restricted being indicated by symbols occupying the place of exponents on both the right and the left of the general symbol. The exponent on the left will indicate the number of years that are to elapse before the benefit is entered upon ; and that on the right the number of years that the benefit is to last after it is entered upon. The absence of an exponent on the left will denote that the benefit is to be entered upon immediately ; and the absence of an exponent on the right will denote that the benefit, when entered upon, is to last for the whole remainder 80 of life. Hence the absence of exponents on both the right and the left of the general symbol will indicate that the duration of the benefit is to be commensurate with that of the life or lives on which it de- pends ; that is, that it is to be entered upon immediately, and to last for the whole remainder of life. Orders of failure among the lives on which a benefit depends, when we have occasion to indicate them, will be denoted by numerals placed over the symbols designating the ages. 191. Thus, in accordance with these conventions, a being the letter chosen to designate the class of annuity benefits generally, a x will denote the present value of an annuity of 1. for the whole life of (a?) : this is called simply a life annuity. a n x will denote the same for the first n years : this is called a tempo- rary annuity. n a x will denote the same for what remains of the life of (x) after n years : this is called a deferred annuity. n a t x will denote the same for t years of what remains of the life of (x) after n years : this is called an intercepted annuity. And if in these symbols x.y be written for x, they will denote cor- responding benefits on the joint duration of the two lives (x] and (y} ; and so also for any greater number -of lives. 192. And in like manner, A x being chosen to denote the present value of an assurance of 1. on (#), and A^ the present value of a survivorship assurance of 1. on (x) against (y), by modifying these symbols in the manner just shown, we acquire the means of indicating the values of the several benefits under the variety of circumstances to which they are respectively subject. 193. We now proceed to the LEMMA. If B denote the present value of a benefit of l . upon a given life or combination of lives, and such that, in the case of a combination of lives the risk is determined by the failure of any one of them ; and if B L denote the present value of a similar benefit on a life or a combi- nation of lives respectively one year older than those on which B de- depends ; if, moreover, TT denote the probability of a payment of B being received in the first year, and IT the probability of the single life, or of all the lives, on which that benefit depends, surviving a year ; then will the following equation always subsist : For, if the benefit make its payments at the end of the year in which 81 they respectively become due,* the value in respect of the first yeair is obviously VTT (78. 184). And the value in respect of the years fol- lowing the first is vIIB l -, for B x is the value, at the time it is entered upon, of the remaining portion of the benefit ; II is the probability of its being entered upon ; and v is the ratio in which the value is dimi- nished on account of the time that has to elapse before it is realized. Hence, a whole being equal to the sum of its parts, or, B=vJT(- 194. On the foregoing Lemma and the resulting formula we offer the following remarks. (1.) The benefits to which the demonstration applies, and in regard to which consequently the equation deduced subsists, must fulfil these two conditions : First, that the payment in respect of any one year in which it may become due shall be always l. An exception may be made in favour of the last year, as will be hereafter seen ; but the ful- filment of this condition obviously precludes the application of the formula, in its present state, to increasing or decreasing benefits. Secondly, the benefit must be such that, in the case of two or more lives the risk will be determined by the first failure that takes place from amongst those lives. The fulfilment of this condition excludes from the application of the formula benefits depending upon specified orders of survivorship amongst three or more lives. The values of such benefits must therefore continue to be found as heretofore from other tabulated values. 195. (2.) The adaptation of Table I. to the foregoing formula is sufficiently apparent. Throwing it into the logarithmic form it becomes, log.B =log.tfH -f log.^+ B,). Log.B is thus the sum of two logarithms, whereof the first, log.^II, is always a term of one of the subsidiary series whose formation has been shown; and the second is the logarithm of the sum of two quantities whose logarithms are known. For, the logarithm of the first, TT-r-IT, will be found to be generally a term of one of the subsi*. diary series, and the logarithm of the other, B p is the preceding result. Hence the requisite operations for finding the successive values of B, may, by reference to Formula I., be typified as follows : * As is always the case unless it be otherwise expressly stated. M 82 T zA. E l7 A. E, log.B, B, E, log.B 1 B, A log.(Tr-JT) ar.co.(Ej A) A log.(7T~n) E X ~A B log.vIT B log.vIT C E,-A C I T rE I) Tjfar.co^Bj-A)] D ) ! 1 E 1 =log.B B E rA + B + C + D l^log.B B 196. The double form of the type is occasioned by there being no negative arguments in Table I. These arise by the subtraction of the line A from the line E p when of the two the former is the greater. The mode in which this difficulty, such as it is, (for it seldom has place in more than two or three values at the extremity of life,) is sur- mounted, is shown in the form typified on the left, and it will be clearly understood by reference to (17). In the examples to be here- after given of the applications of the formula, the point where the operation changes from the one typified form to the other, will be marked by a strong dark line. This mode of indication is employed in some of the preceding examples. 197. (3.) The benefit B p it is stated in the Lemma, must be " similar " to the benefit B. The only restriction here implied, beyond those of its being of the same amount, and subject to like conditions in respect of the life or lives on which it depends, as Bj, is, that its duration shall extend to the same period of life ; in other words, that both benefits shall cease at the same age. It is no matter what that age is, whether the limiting age of the table or any less tabular age ; the formula will still apply, provided only the age of cessation in respect of both benefits is the same. The formula consequently holds in the case of temporary as well as whole life benefits. 198. (4.) But farther, the formula holds also in the case of deferred benefits. To adapt it to such it is only necessary to make 7r = for those years in which no payment is to be made. This reduces the formula to B=^ITB 1 , or log.B=log.i;IT+log.B 1 ; so that, log.Bj being found for the age immediately beyond that at which the blank years begin, log.B for each younger age will be found, without any tabular operation, by the continuous addition to the former of the successive terms of the series log.vll. 199. It remains now to be shown how the initial values, to serve as the grounds of the computations, are to be found. For this purpose the following precepts will be available. First, if the benefit be either temporary or for the whole of life, then, for the age at which all payments cease, B manifestly equals 0. Hence, for the next younger age, Bj vanishes, and the formula, for this age, is reduced to B = vHjf or V7T ' from one or other of which forms the initial value may be readily deduced, by the aid of the Elementary Table, if it be not found as a term of one or other of the subsidiary series. 200. Secondly, if the benefit be deferred, in which class, for our present purpose, intercepted benefits may be included, then, for the age at which it assumes its distinctive character, B is, in the case of a simple deferred benefit, equal to the value of the corresponding whole life benefit ; and in the case of an intercepted benefit it is equal to the value of the corresponding temporary benefit. Hence, as these values are those of B T in the formula for the next younger age, the values of B for all the younger ages may be successively deduced. We now proceed to the applications of the foregoing Lemma. PROBLEM XIV. 201. To construct a table of the present value of an annuity of \ y on a single life, or on the joint duration of any number of lives. This problem comprises two cases, according as the annuity is to cease at, or not to commence till, a specified age. CASE I. The annuity to cease at a specified age. 202. First, let the annuity be upon one life, (x), and to last for the whole duration of that life. It will then be denoted by a x . Hence, recurring to the formula in (193), we have here, B = fl r ; B 1 =a a , + 1 ; also II=p x ', and since the condition of 1. being received at the end of the first year, is that (x) be then alive, rjr= P X ) an d '. 7r-r-IT = l. Hence, or, log.o x = lo&vp, + log. 203. Secondly, if the annuity, still upon one life, (a?), be to cease on the attainment by that life of the age x + n, it will be denoted by a n x ; and we should find, in like manner, 84 or, log.a" =log.vp s + log. (1 204. So also, if instead of one life the foregoing annuities are de- pendent on the joint continuance of two lives, (a?) and (y), their values will be respectively denoted by , and #* y ; and we should find, It is needless to give the formulae for three or any greater number of lives, as the respects in which they would differ from the foregoing are sufficiently obvious. 205. The tabular operation in the case of all these formulae is mani- festly the same. It will be enough, therefore, to give a type corre- sponding to one of them ; and for this purpose the first formula is selected that for the value of an annuity upon (a?), for the whole of life. The type referred to follows : D x negative. D l positive. A' log.tfc, ar.co.Dj DI lg., + 1 w, A log.v^ C JT^ar.co.DJ B C }*iPJ D {=il +B+c a. D rA+B + C l=log.a x . 206. Now to find the initial values: Agreeably to (199), Bj vanishes when the life, or the oldest life in the combination, on which the annuity depends, is of the next younger age to that at which the benefit is to cease. For that age then we have, a x =vp x ; a n x = vp x -, And these, which are the initial values, are all terms of the subsidiary series, log.vp x and log.i^^^. 207. We now give some examples of the application of the foregoing formulae, which will be fully understood by comparison with the type of operation. 85 Present Values of Annuities. I. For the Whole of Life. One Life. 103 510042 -32363 765314 0-489958 611679 44 Two . x y=o. ' 3 1 032921 -10788 103 J 543465 0-967079 011498 72 Lives. J3 1 288193 -19418 102 J 619186 0-711807 788869 6 102 887079 -77104 841035 112921 361138 12 ^} 587956 -38722 102 J 694907 412044 554157 31 J 02 } 696254 -49688 101 J 731890 303746 478903 31 101 089264 1-22818 878017 347916 35 ll} 837051 "68715 101 J 768872 162949 390073 29 ioo J 790867 092922 349959 12 100 225968 1*68255 *| 996025 -99089 100 J 812863 003975 302984 38 100 } 047916 rn665 99 795278 325640 8 900013 428505 43 99 328561 2-13089 99} 1H910 1-29392 777693 360574 6 99} 120926 1-32107 773283 365674 15 882428 495626 41 98 378095 2-38833 * * * * * * 60 020833 10-4914 9^} 138273 1-37491 * * * * * f\ 863039 7-29523 9*J138972 1-37712 * * * * * * 6 \ 871945 7-44638 974707 060342 30 J 962251 918794 34 964065 926631 40 59} 890736 7-77564 59 035079 10-8413 976521 073325 72 58 049918 11-2181 59} 881079 7-60465 9 965878 934663 70 J 96/349 943247 32 5*1.900611 7-95447 f\ 910628 8-14007 977991 086986 17 968819 952030 10 969660 960924 25 57 064994 11-6143 978831 100777 87 571 920859 8-33410 57} 930609 8-52332 57 970501 970020 53 J 970977 978781 t, 8 56 0/9695 12-0142 5jj 19405 74 8-72116 5"} 949766 8-90770 979309 114330 87 5 971455 987651 67 971908 995914 59 55 093726 12-4087 551959173 9-10276 55 972360 004374 66 54} 976800 9-47982 * * * 5 5 } 967881 9-28712 972692 012221 73 979762 127362 24 54 107148 12-7982 * * * *} 984986 9-66020 53 J * # * x 2/=o. y Z=Q. 103 1 103^666800 -03596 103 J 321616 1-444200 459542 1021 86 Three Lives. x-y=i. y-z=2. I0 3l 102 1 1 79048 -15102 TOO J 532036 0-820952 881991 TOSH 45 x y=2. y-z=4- I0 3l 101 ^254769 -17979 97 J 549714 0-745231 817010 T02-I 26 102 [^336958 -21728 102 J 548779 663042 748387 TOT-, 34 101 [> 593120 -39185 99 J 62/155 406880 550415 101 1 100 [ 621519 -41833 96] 638492 378481 530201 IOI "I 101 j> 634158 -43068 101 J 659727 365842 521356 100 1 29 100 } 770748 -58986 98 J 681 722 229252 430578 TOO I 33 99 |> 790270 -61698 95] 648343 209730 418416 100] 19 iooUl5270 -65354 100 J 725713 184730 403126 991 18 99 }> 883081 -76398 97] 688823 116919 363401 991 U 98 1 857048 -71953 94 J 660534 142952 378331 991 3 99 |> 944127 -87928 99 J 672958 055873 329826 98] 39 98 |>935316 -96162 96] 657890 064684 334530 91 45 97 |> 895943 -78694 93 J 633306 104057 356136 9 1 32 08 !> 946950 -88*01 98J * * * * 60-1 60 1 749120 5-61203 97^927781 -84680 ^ : : 60 1 59^779356 6-01667 96 \- 885417 -76810 92 J * * * * * 60 1 58 ^ 806905 6-41070 60 J 949795 820318 - , 17 57 J 955734 846083 591 48 54 J 958465 869855 591 4 50 1 770130 5-89020 58U01865 6-33673 57 1 828324 6-73479 59 J 955237 838206 r8l 26 5J 959495 865446 58-1 57 53 J 961538 888428 5 81 _ 21 48 1 793469 6-21540 57^824998 6*68341 56^849987 7-07925 58 J 959647 858201 _, 59 U 817907 6-57*17 55 J 962259 885469 57 -, 5 56 1847813 7'04390 5 2 -l 963885 907295 571 - 55^871256 7-43457 57] 962169 879386 , fi , 6 54 J 963907 905455 5*1 " 5 1 J 965563 926014 ^j 49 \ 6 841561 6 . 0432I 55 1869373 7-40240 54 j.891626 7-79158 56 J 963601 899943 54 53 J 965256 924339 551 65 50 J 966255 944044 551 23 ^1 863598 7-30463 5^ 889660 7-75640 53 1 910322 8-13433 55 J 964960 919234 541 86 5 2 J 966440 942272 541 53 49-1 967016 960657 541 2 54 !> 884280 7-66090 54J * * * * 53 1908765 8-10622 5i J * * * * 52 1927693 8-46628 4 8J * * * * 87 57 55 54 Present Va One Life. To cease at 60. 974707 -94342 976521 0-025293 313813 47 ues of Annuities. II. r Two Lives. To cease at 60.59. 5?} 964065 -92059 50 J 967349 0-035935 319351 18 Pemporary. Three Lives. To cease at 60.58.54. 591 57^958465 -90879 53 j 961538 0-041535 322276 265088 977991 i'84ii4 453436 57 5?} 250783 1-78149 969660 444224 53 56 242297 r74?02 52 J 963885 438800 431484 2-70075 57} 413937 2-59380 jH 402746 R9 978831 568228 61 970977 555528 27 51 J 965563 547473 547120 3-52468 5} 526532 3-36149 gtwaow 3 . 25 888 50 J 966255 629243 53 979309 655573 15 "" 971908 639610 25 634897 4*31417 5 5 1 611543 4-08830 glwm ,.^0 979762 725356 80 972692 706538 35 49 J 967016 ' 693730 511 41 705198 5-07222 * * 54} 679265 4'7782i * * * 52 } 660787 4-579I7 48 J * * * 208. COROLLARY I. If in the expression, we suppose = 1, which, since v = l-r-(l + r), is equivalent to sup- posing r=Q, or, in other words, that money bears no interest, the expression is converted into (137.140.185), which is the formula for the curtate mean duration of (a?), and the same hypothesis effects a like transformation in the expression for the value of an annuity on the joint duration of two or more lives. Whence it follows, that the number of years in the curtate mean duration of any life or combination of lives, is the same as the number of pounds in the value of an annuity on the same life or combination of lives, when money bears no interest ; and also, that it is the same as the average number of payments that each annuitant, of the same speci- fied age, (whether an individual or a combination,) will receive. 209. COROLLARY 2. As in each single operation of those just exemplified, we form the logarithm of an annuity, so in that which follows we form the logarithm of the same annuity increased by unity. This is evident by reference to the formulae and the type of operation. In fact, the line D being equal to log.a, when D is negative, 88 log. (1+0) is equal to the sum of D and the succeeding B and C ; and when D is positive 12 log.(l + ) is equal to the sum of the succeed- Iog.(l+a 102 ) 0*248229 ing B and C alone. This will be understood 495626 from the examples in the margin, which are . i c T^p log.(l+ 99 ) 0-495667 taken from the foregoing operations. 210. Now log.(l + ) is a function that 302984 comes frequently into use, as will hereafter be more fully shown. In the meantime it will lg-(l+ fl ioo.ioo) 0*299047 suffice to explain a single application of it. Suppose that a benefit, whose present value is B, is to be purchased by an annual premium, which makes its first payment now, and its succeeding payments at the end of every year, Ig-(l~l~ a 56) 0-655588 either to the extremity of life, or till the attainment of a specified age. Now employing a as a general symbol, to denote the present value of an annuity payable till the attainment of the specified age, the present value of the premium, if its amount were 1., would evidently be 1 -f a ; or, if its unknown amount be called m, its present value will bem(l + a). Now, that the arrangement may be an equitable one, we must have, T> whence, m=~ -- ; or, log.m=log.B log.(l-fa). Hence, log.(l + a) for all ages and combinations being known, we have the means of readily determining the amount of the uniform annual premium equivalent to any benefit whose present value is known. 211. CASE 2. The annuity not to commence till the attainment of a specified age. First, let the annuity be upon one life (#), to be entered upon at age (x + ri), and to continue for the remainder of life. Then, in the general formula of (193) we have, B=X; B 1 =-x+i; T=O; n= Px . Hence, * a *=vp*"~ la x+i> or, log."^ = hg.vp x + log."- l a x+ 1 . 212. Secondly, if the annuity, when entered upon, is to last only t years thereafter, the expression just deduced takes the following form : or, og- = o g.v/ And if it depend on two or more lives the requisite changes will 89 be made in the formulae, by writing x.y, x.y.z, &c., for x in the suffixes. 213. It thus appears that, according to the number of lives on whose continuance the several benefits depend, a table of the present values of any one of them may be formed by the continual addition to the logarithmic initial value, of the successive terms of the proper one of the series log.vp x , log.vp^), &c. 214. The initial values are formed by making n in the formulas = 1, and x, x.y, &c., consequently the age next to that at which the benefit is to commence. The formula then become, log. l a x =log.vp x +log.a x+l ; and, log. V =log.^+ log.< +1 ; and similarly for two or more lives. The initial values then are log. a x+1 , log.fl^ +1 , &c., which will have been found by the first case of the present problem. 215. The most common case of an intercepted annuity is that in which t = I t and the annuity consequently is to make but a single pay- ment. In this case it is called an endowment, to be received, not at the period at which the corresponding annuity would be entered upon, but a year later, namely, at the period at which the first and only payment is to be made. Thus, an endowment of 1., to be received at 60, is the same as an intercepted annuity of 1. for one year, to be entered upon at 59. 216. We now give a few examples of the formation of the values of the benefits under consideration. Present Values of Annuities. III. Deferred. One Life. To be entered upon at 60. 60 020833 10.4914 974707 59 995540 9-89781 9/6521 58 972061 9-37694 977991 57 950052 8-91358 978831 56 928883 8-48952 979309 55 908192 8-09454 979762 54 887954 7-72598 Two Lives. To be entered upon at 60.59. 60.59 871945 7-44638 964065 59.58 836010 6-8^04 967349 58.57 803359 6-35856 969660 87*6 ggg S . 9295I 56.55 743996 5-54620 971908 55.54 715904 5-19881 972692 54.53 688596 4-88198 * * * Three Lives. To be entered upon at 60.58.54. 60.58.54 806905 6-41070 958465 59-57-53 765370 5-82600 961538 58.56.52 726908 5-33222 963885 57.55.51 690793 4-90674 965563 56.54.50 656356 4-53269 966255 55-53-49 622611 4*19383 967016 54.52.48 589627 3-88711 * * * 90 Present Values of Annuities. IV. One Life. One Payment. (Endowment.) Ten Payments. To be received at 60. To be entered upon at 60. 60 000000 I -000000 60 844978 6-99807 974707 974/07 59 974707 943424 59 819685 6-60214 976521 976521 58 951228 893774 58 796206 6-25470 977991 977991 57 929219 849608 57 774197 5-9456i 978831 978831 56 908050 809188 56 753028 5-66276 979309 979309 55 887359 '77 I 54i 55 732337 5'3993 979762 979762 54 867121 736411 54 712099 5-I5346 * * * * * * Intercepted. Two Lives. Ten Payments. To be entered upon at 60.59. 60.59 770031 5-88884 964065 59.58 734096 5*42121 967349 58.57 701445 5-02858 969660 57.56 671105 4-68927 970977 56.55 642082 4-38613 971908 55.54 613990 4-11140 972692 54.53 586682 3-86084 217. An annuity to last n years, and an annuity to commence in n years and continue for the remainder of life, are obviously together equal to an annuity for the whole of life. That is, in symbols, : + X=*- Advantage is taken of this relation as a means of verifying the values determined as above. For, if a x , a n x) and n a x have been formed, for the same values of x and n, it is obvious that the subsistence amongst them of the foregoing relation will be a sufficient presumption that all of them have been correctly determined, while its non-subsistence will be an undeniable proof that error has been committed. An example is given in the margin. 218. But it is seldom that we shall be provided with such a complete array of values for verification as is here supposed. It will hardly ever be thought necessary, in addition to a x , to compute both a* and *a x . The foregoing relation can still, nevertheless, be rendered available. 0^=5-07233 4 = 12- 054*2.48 6 54.52.48 054.52.48 8*46628 The value of a benefit to be entered upon at an after period is obviously equal to its value at the time of its being entered upon, multiplied by the probability of its being entered upon, and by the present value of 1. to be received at the same time, (78.) that is, since to,=*-!4 or, ./,+ log.fl +n . 91 We have thus the means, if log.a x for all ages be known, of readily determining both \og. H a x and logaj ; and hence, if the series of values of either of these quantities has been constructed, of verifying that series at as many points as we please. 219. The same properties hold, mutatis mutandis, in regard to benefits depending on the joint continuance of any number of lives, and may be applied in the same way for like purposes. 220. It will be observed that no means have yet been explained for verifying the series log.a^. This will be done hereafter, (335.) In the mean time some examples are given of the application of the methods of verification just explained. Endowment on (54). To be entered upon at 6C Log.4o=3-561459 colog./54=4;382685 = 1-9229/7 1-867121 Annuity on (54). Deferred 6 years. Log.fl6o= 1-020833 ^0=3.561459 colog.Z 54 =4-382685 log.v 6 =1-922977 0-887954 Annuity on (54.53). Deferred 6 years. Z 60 =3-561459 / 59 =3-573915 colog.Z 5 4=4;382685 43=4-375615 log.z; 6 =1-922977 0-688596 PROBLEM XV. 221. To construct a table of the present value of an assurance of 1. upon a single life, or the joint continuance of any number of lives. This problem, like the last, comprises two cases, according as the benefit is to cease upon, or not to commence till, the attainment of a specified age. 222. CASE 1. The assurance to cease at a specified age. First, let the assurance be upon a single life, (%}, and to last till the end of life. Hence, in the formula of (193), we have, B=A X ; B 1 =A, C+1 , TT, the probability of 1. being received in the first year, = 1-^; andIT=^, .-. 7rH-IT=(l pj+p^p,- 1 !. or, oS- 223. Secondly, if the assurance be to cease on the attainment of age x+n, being then denoted by A^, the formula will be, or, 92 224. These formulae, like those of last problem, will be adapted to two or more lives by making the requisite changes in the suffixes. Thus, for a whole life assurance on two lives, (x) and (y} } we should have, 1S- A,, =log.t?Pc,,) + log. [(p (xjj - l - 1) + A x+ 1 y+ J . The expression, log.fjt^." 1 1), which occurs in the formulae for a single life, is tabulated for all ages amongst the elementary values, and hence those formulae admit of immediate application. But it is otherwise with the analogous expression in the formulae for two or more lives. Log^/^)" 1 1) is not tabulated, nor can it be formed by combination of any of the tabulated values. For two or more lives, therefore, we have recourse to a different formula, the method of deducing which will be presently shown. 225. The foregoing formulae give the following type of operation : E l7 A. rX+B + C + D UtofcA. 226. The initial values are determined as follows. When the assurance is to last to the end of life, then if x be the oldest tabular age, A,,. + 1 = 0; and since p x also in that case equals 0, the formula of (222) reduces to &*=*>'> that is, log.A, c =log.v. 227. If the assurance is temporary, then when a is the age next younger than that at which the benefit is to cease, that is when w = l, A-J=0, and the formula of (223) gives for the initial value, or which may be constructed from the Elementary Table. 228. The following examples show the application of the foregoing formula). 93 Present Values of Assurances. First Method. I. For the \\ 104 987163 '970874 One Life. r hole of Life. 60 823017 -665298 II. Temporary. To cease at 60. 59 438554 -027451 301030 0-313867 510042 686133 485721 463847 1-359170 974707 377693 67 394568 0-043986 976521 323534 46 103 982926 -961448 823909 159017 765314 387766 10 102 976999 '948415 602060 374939 841035 527737 27 59 816314 -655110 58 694669 '049507 394568 421746 976521 437843 44 58 808976 -644133 329257 365412 977991 521077 8 57 828333 '067349 329257 479719 977991 493857 18 57 801123 -632591 287085 541248 978831 650983 37 ioi 970859 '935101 455932 514927 878017 630698 21 56 916936 -082592 287085 -514038 978831 527098 37 261263 655673 979309 742317 60 100 964668 -921866 56 793051 -620941 55 982949 -096150 235184 747765 979762 819130 55 346787 617881 900013 711607 66 99 958473 -908810 261263 531788 979309 544283 85 55 784940 -609453 54 034131 -108176 435728 522745 882428 636685 35 235184 549756 979762 561779 54 215194 818937 980093 880254 32 98 9548/6 -901313 54 776779 -598106 53 075573 '119007 455932 498934 878018 618496 26 215194 561583 980093 573260 82 53 768629 -568989 * * * 188528 887045 980510 939970 40 97 952472 '896339 * * * 52 109048 -128543 * * * 229. We have now to deduce a formula adapted to the computation of cases involving two or more lives. The formula of (222) is, Performing the multiplication by p x this becomes, * This formula, how many soever may be the lives on whose joint continuance the benefit depends, admits of the application of Table II., agreeably to the following type : 94 H l log.A, +1 A,,, A kg*. B C } T a [HJ D llog.^(l-A x+1 ) E log.v F G } T 2 [D] H e B+F+G I =log.A, A, 230. There is no argument for the direct use of Table II. and the inverse use of it is not recommended > (25) greater than TOOOOOO. Hence, when log.A x+1 exceeds this limit, the formula is nugatory. The ages thus excluded are of course the older ages, for which, as it happens, the value of this benefit is least frequently wanted. The table, however, can be completed by other means. There exist, as is hereafter demonstrated (239, &c.), certain relations between the values of an annuity and an assurance on the same life, or combination of joint lives, which enable us, when the value of either is known, readily to pass to that of the other. We can therefore in this way supply the values which the preceding formula fails to give, and also form initial values for its use at those parts of the mortality table where it can be applied. 231. The relation we here make use of for the latter purpose is, Av(l r^Jj which, as usual, is adapted to two or more lives by changing the suffixes into x.y, x.y.z, &c. ; and the initial values for the succeeding examples are determined as follows : Iog.fl6o=l;020833 log.r=2-477121 log.m 60 =T-497954 log.z?=T-987163 -835833 21 log.A,=T-823017 Iog.a 60 .59=0-871945 log.r=2-477121 log.ra 60.59=1' 349066 log.A co .59=T-877365 log.a co .58.54=_0-806905 log.r=2'477121 log.ra 6 o.58.54=T'284026 95 Present Val One Life. 60 823017 '665298 nes of Assurances. Sec( For the Whole of Life. Two Lives. *} 877365 -753988 md Method. Three Lives. 661 5 8l894402 -784155 987544 524492 165 512201 976902 390847 107 367856 54 J 971302 333785 357 305444 774717 764684 '754337 987163 829103 47 987163 884630 13 987163 901965 591 15 59 816313 '655109 59 1 871806 -744400 989358 537518 165 57 \ 889143 980186 407288 274 53 J 974375 352533 196 327104 987163 896293 sai 16 56 1883482 5 2 J 976722 371593 59 527041 387748 987163 821783 30 987163 878389 18 58 808976 '644133 5?} 865570 -733787 990828 551243 43 J 982497 425147 83 542114 987163 813916 45 407727 987163 871724 26 348374 987163 890394 571 8 57 801124 -632593 * * * 57 1 858913 -722625 * * * 55^877565 5i J * * 232. These operations are tedious. Two tabular entries are requi- site for each assurance value, and one or other of them is always in that part of the table whose results are but little to be relied on (29) . The consequence is, that in a succession of values deduced in this way some of them will be found to differ materially from the truth. In extensive trials we have found deviations of so much as 6 and 7 in the 6th decimal place. It is obviously unnecessary to have recourse to this method in the case of single lives, since we have already another method applicable to such, which is not only much simpler, but which also, like all the operations making use of Table L, gives results as correct as any succession of logarithmic results can possibly be. 233. COROLLARY. If, in the case of an assurance to cease at a spe- cified age, less than the oldest tabular age, the sum assured is to be paid on the attainment of that age, if it shall not previously have become due, that is, if the life or lives on which it depends shall be 96 then in being, the benefit bears a close analogy to a whole life assu- rance. In both cases the payment depends, for a specified time, on the same conditions, and in both also, at the expiry of that time, it becomes certainly payable if it have not previously done so. If there- fore, for the oldest tabular age in the one benefit, we substitute in the other the age immediately preceding that at which the sum assured is certainly to become payable, the treatment of both will be in all respects similar. In the one case as in the other the initial value will be log.v, and the subsequent operations are identical in form, although, of course, the results will differ in value. An example is here given : Present Values of Assurances. To be received at death, or at 60. 59 987163 -970874 394568 1-592595 976521 603460 92 58 974641 -943280 329257 645384 9/7991 655019 82 57 962349 -916958 287085 675264 978831 684279 63 56 950258 -891780 261263 688995 979309 697700 93 55 938365 -867690 * * * 234. This benefit is one for which provision is frequently made in the regulations of Friendly Societies. Its present value is obviously that of a short term assurance, together with an endowment payable at the end of the term, so that by adding together the values of these two benefits, separately obtained, we are furnished with a ready method of verifying the computation. This is here shown : Assurance on (55) to cease at 60 '096156 (228) Endowment on (55) to be received at 60 .. -771541 (216) 867691 97 235. CASE 2. The assurance not to commence till the attainment of a specified age. The operations here, in accordance with (198), the requisite change being made in the initial values, are identical with those of (216) for the same ages and number of lives. Present Values of Assu One Life. To commence ot 60. 60 823017 '665299 974707 ranees. III. Deferred. Two Lives. To commence at 60.59. 6o -59 877365 -753988 964065 59 58 57 56 55 # 797724 976521 774245 977991 627660 594627 565244 538353 '5 I 33o6 * 59.58 58.57 57-5 6 5 6 -55 55-54 * 841430 967349 808779 969660 694113 643841 600398 561586 526140 * 752236 978831 778439 970977 731067 979309 749416 971908 710376 * 721324 * 236. The series of values thus formed admit of verification after the manner of (220). Thus : log.A6o=l-823017 log.4o=3-561459 colog./55= 4-390086 lo.^ 5 = 1-935814 log. 5 A55= 1-710376 237. Intercepted assurances belong to this case ; but it does not seem worth while to give an example of its application to these. 238. The present values of an annuity and an assurance upon the same life or combination of lives are intimately connected, and in fact mutually dependent upon each other. In virtue of this relation we can readily pass from the one to the other, and hence obtain, from point to point, verification of the results of both the last and the pre- sent problem. 239. The nature of the relation thus subsisting may be shown in various ways. 1st. By (185), =0 (!+<,)-, 98 240. By subjecting this expression to a few obvious transformations it assumes various forms, some of which are, in particular circum- stances, better adapted than others to numerical computation. Thus : v(l+a x ) a x =v a x + va x =v (I v)a x .. (2) Adding to this the neutral quantity, 1 1, we have, v-(l-v}a x = \-l + v-(\-v}a x = l-(l-v)(l + a x }..(3) Also, since 1 v=vr, (76), v (lv)a x =vvra x =v(I ra x ) .. .. (4) Again, since = T-T- , and -=P, (76), Of these five expressions for the same function, A x , (1), in the form l+a x , x a x , and (5), are given by Mr. Morgan; (2) and (3) we owe to "1 ^^ y/j Mr. Milne j and (4), in the form - -, to Mr. Baily. 241 . 2nd. A second method of deducing the value of an assurance from that of an annuity is as follows. Suppose that (#) is in posses- sion of a perpetuity of jl. per annum. What remains of this after the death of (a?) is evidently now worth Y a x . But at the end of the year in which (x) dies its value will be 1 -f P, for his representa- tives will be put into possession of 1., the rent for that year, and the remainder of the perpetuity, which being itself a perpetuity, its value will then be P. Hence P a x is the present value of an assurance of 1-fP upon the life of (a?). That is, p-a,= 242. 3rd. Again. Since r is the interest of 1. for a year, invested now will produce r per annum during the life of (#), and at the end of the year in which that life fails, the produce will be r, the interest for that year, together with a return of the principal. Con- sequently 1. is the present value of an annuity of r and an assurance of 1+r upon the life of (a?). That is, "1 ' Vfl Whence, A,=-y-^=i;(l -ra x \ 243. 4th. Once more. The present value of an annuity of 1. upon (a?), which makes its first payment immediately, is l+a x . Suppose 99 now that each payment is deferred for a year, so as not to be made till a year after (#)'s title to receive it has been determined : in this case the value will obviously be v(l +a x ). But in these circumstances the annuity will be the same as an ordinary annuity making an addi- tional payment at the end of the year of death. In other words, it will be the same as a life annuity of l. together with an assurance of 1. Hence, 244. It is easy now, from any of the foregoing expressions for A z in terms of a x , to deduce a value of the latter quantity in terms of the former. Thus : & x =v-(l-v)a x . P.JL .-. (1 v)a x =v k x , and a x = y^ 245. A more convenient form for tabular computation is, which arises by dividing both numerator and denominator of the other by v. 246. We have thus the means, within certain limits, if the series log.c^ and log.A,,. have been formed by continuous operations, of proving the accuracy of both, by passing from the one series to the other at a few points, by means of the foregoing formula?. Or, if one of them only, as log.a,,., has been formed, and otherwise proved, (as by the operation of Problem XXII.,) we have evidently the means of readily finding any term of the other. The formulae most convenient for this purpose, and which admit of the application of Table II, are, i - and = - , which give the following types of operation : * Of the four methods just given for deducing the value of an assurance from that of an annuity on the same life or lives, the first consists of an obvious alge- braical transformation; the second is adapted from Milne, pp. 167, 168, and the " Penny Cyclopaedia," article REVERSIONS; the third, which is substantially the same as the second, is taken from a " Report on the Bengal Military Fund," by Mr. Griffith Davies ; and for the fourth, which is now for the first time published, the author is happy to express his obligations to an esteemed friend, Mr. Peter Hardy, F.R.S., Actuary to the Mutual Life Assurance Society, and to the Equi- table Reversionary Interest Society, and one of the Vice-Presidents of the Insti- tute of Actuaries. t The method of using another of the formulae of (240) has been shown in (231). 100 A B C D E F log. (1+0,) log.(l-t>) A, rA+B= llog.(l-tO(l + <0 }T 2 [C] rD + E = llog.A, A B C D E F G log.A. log.(l-fr) fl , |A+B = llog.(l + r)A, colog.r }T 2 [C] cD + E + F l=log.a x 247. The value in the line C will occasionally be found to exceed the greater limit of Table II., in which case the operations may be completed either in numbers, or by the use of the common tables. Log.(l + a x ), which occurs in the first of these formulse is formed, as already noticed (209), in the operation for the construction of 248. We now give a few examples in illustration. Assurances deduced from Annuities. 103 60 One Life. 0-121765 2-464284 Two Lives. 0-044491 2-464284 Three Lives. 0-015342 2-464284 2-586049 2-508775 2-479626 F982888 38 f-982926 -961448 1-060372 2-464284 1-524656 1-985747 8 1-986682 103 ] i? 103 M '986694 -969826 "3 1 1-985755 .0677*2 i3 J 0-918828 2-464284 103] 0-820335 2-464284 1-284619 1-383112 f-822995 22 T-907078 * -, 19 ^Q T , 1-879865 29 T823017 '665298 60 1 1-907097 -80741* |r-879894 -758392 ties deduced from Assui Two Lives. T879894 0-012837 Annui One Life. 1-823017 0-012837 60 J Dances. Three Lives. T-816543 0012837 1-829380 1-522879 1-511683 53] 42 T-835854 1-892731 1-522879 1-497855 100 1-522879 1-339913 60 1 246 1-020834 10-4914 60 1-0-863038 7 . 20WI 35 ^1-034604 10*8294 F-603419 0-012837 f-616256 1-522879 1768392 31 T855292 0-012837 7J 1-830393 0-012837 1-868129 1-522879 1-417896 200 1-843230 1-481288 531 161 1-291302 19-5570 }0-940975 ., aoaa 37 }> 1-004328 10-1002 ^r* \ ' 101 PROBLEM XVI. 249. To construct a table of the present value of a survivorship assurance of l. on (#) against (y) ; that is, an assurance of 1. to be paid at the end of the year in which (#) dies, provided he shall have been survived by (y). This is the benefit whose present value is denoted by A~, (192). The general formula of (193) is, and hereB=Ai 5 ; B n=p (t - l ; .-.7r-i-II= -=i(l -p f )(I +^,(99.177); and l + l), and the formula becomes, or, in logarithms, 250. This is the working formula, the series log. vp (x ^ and tog-idV 1 iX-P," 1 * 1 ) havin g been alrea A ^ + A ^ = ^x.y > and the first is obviously a particular case of the second. We are thus in possession of a ready means of testing the accuracy of our computations. 253. The initial values here are deduced in precisely the same way as in (179). The expression in (249) becomes, on multiplying out A 1 - = v[\ (1 -ft 1st. Let x=y. Then if (x) and (y} are of the oldest tabular age, P*> P y > au &P(*y) vanish, and the expression is reduced to A ^=i" ' log.A^=log.i+log.t>, = (when interest is 3 per cent.), 698970+987163 = 686133. 2nd. Let x 7 y. Then if x be the oldest tabular age, p f and p^ y ) vanish, and we have, or log-A=log.^4-log.4(^ y ~ 1 + 1), the mode of forming which is obvious. 3rd. Let x L y. Then if y be the oldest tabular age, p y and vanish, and the expression becomes, or, log.A^=log.^ + Iog4 -f log.Qtv 1 1), which also may be readily formed. 254. When a whole table is to be computed the best way of form- ing the initial values for the several compartments will be in two series, as in (180). Indeed the operations will only differ in that here the first term of each series will include log. v. The formation of a few terms is given : 103 Survivorship Assura Initial x7 y log.t^os 510042 ^Ioa+1) 301030 nee. (x) Values. 104.103 104.102 104.101 104.100 811072 255272 ' 823909 890253 075721 954242 920216 036983 978811 936010 against 103.104 102.104 IOI.IO4 100.104 x L y 698970 510042 301030 510042 255272 522879 288193 075721 778151 142065 036983 853872 032920 Verification. log.vpm 878018 log log.iCpuxf^ + l) 057992 .vp m 878018 log.-J 698970 i_l) 455932 104.100 936010 log.^uxT 3.104 032920 255. We now introc formula. Survivorshi x=.y. ^4} 686133 -485437 10 uce a few examples of p Assurances. On (x) I. x= or 7 y. x y=i. 104 \ 81 1072 '647250 the application of the against (y). x y = 2. JJ} 890253 -776700 J 602060 0-915927 032921 084073 965672 103 425969 0-614897 288193 385103 709270 380211 O489958 363914 510042 611723 ioi } 684 726 -483867 Jo?} 808535 '643480 ioi} 865890 '734328 948848 264122 543465 735878 452867 903090 094555 619186 905445 350876 ** 1 778597 -600616 660052 118545 731890 364309 26 " 881901 016011 656169 983989 309110 102 >- 681058 '470708 ^g| 831 169 '677905 647817 183352 753885 402280 31 101 } 804013 -636814 511449 ' 292564 773282 471453 42 ' 681241 000183 694907 999817 301122 J^} 677087 '475430 513924 163163 768872 390192 37 ** j 756277 -570529 501689 254588 790867 446662 56 ;} 673025 -471004 ^j 739274 -548623 J | 756226 -570461 392544 280481 812863 463477 53 402304 336970 795278 501361 48 99 j 698991 -500024 * * * 404779 351447 790868 511342 32 99 j 668937 '466592 * * * 99 1 707021 -509356 * * * 104 J3 1 5 io042 -323625 II. xty. y #=a. H 288193 -194175 * x j 142065 -138696 " 124939 0-614897 288193 385103 709270 903090 0-614897 363914 385103 709270 756962 0-614897 400897 385103 709270 * j- 507505 -321740 \l l \ 361377 -229814 J| 252232 -178744 726999 219494 619186 780506 424498 580871 219494 656169 780506 424498 471726 219494 678164 780506 424498 * ] 551 189 -355786 *j 442044 -276722 102 } 354894 '226409 535113 016076 731890 309104 39 425968 016076 753885 309104 39 514909 160015 736300 839985 388366 Jj 576146 -376831 t ^} 488996 -308316 ioi} 4 ^ 9560 '3 l6 89 404779 171367 790867 395072 40 493720 004725 773282 995275 303399 513924 034364 768872 965636 318552 t 99J. 590758 -389725 !^} 565676 -367854 j^H 566984 -368964 481485 109273 795278 359053 81 41 501689 063987 790868 334154 47 489454 077530 793558 341506 Sg} 635857 -432371 Sg | 626758 -423407 * * >n 9 6 | 624534 -421244 * * * 256. It maybe noted, in regard to the example y a? = 2, that the operation, after changing from the first typified form to the second, reverts, for a single value, to the first of these forms. This may occa- sionally happen in regard to almost any of the formulae we have given, in the use of the Carlisle Table. It will hardly happen, however, when any more regularly graduated table is employed. But it is well to be prepared for its occasional occurrence. 257. Verification may be obtained as follows, agreeably to (252), if the values of assurances on the joint lives have been computed, either independently, or from the annuities. 103.103 103.103 483867 483867 967736 IOI.IOO IOO.IOI 570529 376831 AIOI.IOO '947360 99-97 -509356 97.99 -423407 A 99 .97 '932763 258. The value of a survivorship assurance, in terms of annuity and assurance values, is expressed by the following formula : + a ^ L - a ^> (Milne, p. 184) ; P,-\ Py-l 105 and this ought also to serve as a formula of verification. But with ex- isting tables it is all but useless for this purpose. Those tables extend only to three decimal places, and from the manner in which the annuity values enter the foregoing expression it is easy to see that the assurance value deduced by means of it cannot be true to more, and hardly to so many. Mr. Milne (pp. 355, 356,) labours to prove that the error will " seldom amount to '0005." But he is mistaken, of which Mr. De Morgan gives a notable example, (" Companion to the Almanac," 184.2, p. 7.) And others can easily be adduced. Thus : p. 352, A\jj 7 According to Milne . . '08656 True Value '08284 Error '00372 Per cent. . . 3*96 52556 00226 o*43 P- 354, AJ_ 11287 "11062 It is obvious then that till better annuity tables are formed this me- thod cannot be employed to verify results for which we claim a greater degree of accuracy in the sixth place than the results of thejnethod in question possess in the third. 259. The operation of this problem may be applied to the compu- tation, in series, of the values of deferred and temporary survivorship assurances, in the manner shown in previous problems. But it does not seem necessary to say more on the subject here. When a table of the values of the whole life benefit has been formed, for every combi- nation of ages, it is easy thence to deduce the value of the benefit when it is either deferred or temporary. Thus we have for the deferred benefit, "A- =v n p (r , .A , x,y r^x.yin. x j cn.y + n > and for the temporary benefit, 260. SCHOLIUM. This method of deducing the values of deferred and temporary benefits from the value of the same benefit for the whole life, holds in every case, whatever be the number of lives on which the benefit depends, when the risk is determined by the first failure that takes place from amongst those lives. That it holds in the present case seems, however, to have been overlooked by Mr. Milne, whose formulae for the same purpose, on p. 184, although not greatly more complex in appearance than those just given, wall be found to involve a great deal more labour in their numerical applica- tions. 106 PROBLEM XVII. 261. To construct a table of the present values of increasing annuities. 262. 1, 1, 1, 1, 1, 1, 1, (1) 1, 2, 3, 4, 5, 6, 7, (2) 1, 3, 6, 10, 15, 21, 28, (3) 1, 4, 10, 20, 35, 56, 84, (4) The foregoing series are formed as follows : (1) is a series of units ; each term in (2) is the sum of the corresponding term and all the preceding terms in (1) ; in like manner, each term in (3) is the sum of the corresponding term and all the preceding terms in (2) ; and so on for the succeeding series, which obviously may be continued at pleasure, both horizontally and vertically. Now it is a property of series so formed, which follows obviously enough from the mode of their construction, that any one of them will be produced by adding its terms, carried one place to the right, to the terms of the series of the next lower order. Thus, to produce (2), we have, i, 1, 1, 1, 2, 1, 3, 1, .... 4, .... Sum, i, 2, 3, 4, 5, .... To produce (3), we ha) 1, re, i! 3, 3, 4, 6, 5, .... 10, .... Sum, 1 3 6 10 15, .... To produce (4), 1 3 6 10 15, .... 1, 4, 10, 20, .... Sum, 1, 4, 10, 20, 35, .... and so on. 263. Now let the terms of any one of these series be the number of pounds in the successive payments of an annuity which is to com- mence immediately ; then it is obvious from what has just been shown, that that annuity will be equivalent to two annuities, the one com- mencing immediately and the other a year hence, and of which the payments of the first are the terms of the next inferior series, while the payments of the second are the same as those of the complete annuity under consideration. The value of this annuity, therefore, will be the sum of the values of its two component annuities. 264. To render this more plain, if the annuity is one whose suc- cessive payments are to be 1, 2, 3, 4, &c.> pounds, it may be decom- 107 posed into the two annuities whose successive and simultaneous payments are as follows : 1st year. 2nd year. 3rd year. 4th year, &c. 1st annuity 1111 &c. 2nd 1 2 3 &c. And in like manner an annuity whose payments are to be 1, 3, 6, 10, &c., pounds, is equivalent to the two whose payments are as follows : 1st year. 2nd year. 3rd year. 4th year, &c. 1st annuity 1 2 3 4 &c. 2nd ' 1 3 6 &c. and so on. 265. To form the value, therefore, of such an annuity upon any specified life or combination of lives, two elements are requisite ; first, the value of an annuity on the same life or combination of lives, the payments of which are the terms of the series of the next inferior order ; and, secondly, the value of an annuity on a life or a combina- tion of lives a year older than the life or combination in question, and whose payments are the same as those of the annuity whose value is sought. For when this last is known we can easily, in virtue of a principle we have frequently employed, determine thence the value in respect of the life or combination with which we may be occupied. Now the first of these elements, in regard to any of the series, is evidently attainable. For we know the values in respect of one of them the lowest the payments of which are 1, 1, 1, &c. (201, &c.); and from these we can ascend, so far as this element is concerned, to as many as we please of the higher series in succession. It is obvious also, in regard to the second element, that if, commencing with the oldest tabular age or combination of ages, we can assign a single value of the annuity whose values are to be tabulated, we shall be able to deduce in succession the values corresponding to all the younger ages or combinations of ages. 266. To apply these principles : Let, for facility, the annuities be on a single life, (at), and let their present values be denoted, when the payments are the terms of the 1st series in (262), by a x ; j) 2nd i x ', 3rd ' *"> that is, the (m + 2)th series being the figurate numbers of the mth order, when the payments of the annuity are the same as the numbers 108 of this order, its present value will be denoted by i x (m \ Now, agree- ably to what has been shown in (263), &c., the present value of this annuity will be equal to the sum of the values of an annuity of the (m l)th order, to commence now, and an annuity of the wth order deferred a year. Hence, in symbols, i x to> = ij m -u + vpji f+l , (193); and by this formula, which on passing to logarithms becomes, the annuities corresponding to each series may be successively formed. 267. The formula deduced gives the following type of operation : B^C. B 7 C. B-C ar.co.(B-C) * JT^B-C] D+E n B-C 268. Since the first payment of all the annuities is 1., the initial value will in every case be simply vp x , corresponding to #= the next to the oldest tabular age. For i x+1 (m} for this age vanishes, and i x (m ~ l) is then also 1. to be received in a year, subject to the failure of the life of (x). 269. We now give the following examples : Present Values of Increasing Annuities. Annuity of i, 4, 10, 20, &c., pounds. 103 510042 -323625 765314 275356 059976 0-784620 215380 850648 102 126004 1-33661 Annuity of i, 2 pound 103 510042 765314 , 3, 4, &c., s. 323625 0-611723 959572 Annuity of 1,3, 6, 10, &c., pounds. 103 510042 -323625 765314 275356 2/5356 887079 388277 706722 982078 0-706722 293278 784620 102 982078 102 059976 1-14819 109 102 101 IOO 99 98 982078 841035 823113 959572 266151 1*89363 070656 3-11247 064557 4-60329 167401 5-89986 * 102 059976 841035 901011 089264 733849 454182 277295 623716 528711 277295 878017 101 429722 878017 155312 307739 225968 929344 337793 493105 814634 403529 493105 900013 loo 7H268 900013 393118 328561 334476 31 663068 882428 611281 663068 948213 327695 99 938976 882428 545496 821404 770842 327014 33 378095 392746 1 770842 * 98 097889 * * 3/6284 2-68981 185366 IO2 IOI IOO 99 98 * 126004 841035 1-33661 462683 3-61672 274936 7-87466 142731 14-9444 040983 23-9283 * 967039 429722 537317 591276 558315 878017 436332 711268 725064 459900 896232 900013 796245 938976 857269 378233 174478 882428 056906 097889 959017 322005 378911 * 051787 8-68912 050562 12-5282 270. In these examples it will be observed, first, that in all, the lines corresponding to that marked A in the type are the same, being the successive terms of the series log.i;^ ; secondly, that in example 1 the line corresponding to C is occupied by the successive values of log.o^,, being the results of the first example in (207) ; and thirdly, that in each of the remaining examples the same line C is occupied by the results of the preceding example. PROBLEM XVIII. 271. To construct a table of the present values of increasing assu- rances. 272. The solution of the present problem, when the annual varia- tion is as in the last problem, follows so obviously from the principles there employed, that to enter at length into it would be but to repeat previous reasoning. The formula here also is entirely analogous to that last obtained. Using h x to denote the present value of an assu- rance upon (a?), which is to be !., ,2., 3., &c., according as the failure of the life of (a?) shall take place in the 1st, 2nd, 3rd, &c., year from the present time, we have, 110 which formula, differing from that of (266) only in the substitution of h for i y gives a type of operation differing in only the same respect from the type in (267). It is therefore unnecessary to repeat it. 273. The following are examples of the operation in question, the initial value being in every case log.v. Present Assurance of i, 2, 3, 4, &c., pounds. 104 987163 '970874 51Q042 497205 Values of Increasing As Assurance of i, 2, 6, 10, &c., pounds. 104 987163 -970874 510042 surances. Assurance of i, 4, 10, 20, &c., pounds. 104 987163 -970874 510042 497205 497205 982926 0-485721 514279 608526 105731 0-608526 391474 704151 201356 0704151 295849 782473 103 105731 1-27565 765314 103 201356 1-58985 765314 103 279678 1-90405 765314 871045 966670 044992 976999 105954 894046 357230 228275 261605 738395 451239 417909 372917 627083 526343 102 228275 1-69151 841035 102 417909 2-61764 841035 102 571335 3-72679 841035 412370 069310 970859 098451 353011 29 258944 323899 064955 935045 334/21 593665 181295 818705 401070 101 323899 2-10814 878017 IOT 593665 3*92342 878017 101 813440 6-50789 878017 201916 964668 237248 435627 30 100 400325 2-51377 900013 471682 400325 071357 338142 31 691457 738498 047041 952959 325187 100 738498 5-47643 900013 100 016644 10-3907 900013 300338 638511 916657 860688 055969 329879 37 958473 341865 504722 45 463240 175271 397405 43 99 463240 2-90663 * * * 99 860688 7*25585 * * * 99 190604 15-5097 * * * 274. Any of the results of this problem may be verified by the aid of the following relation, which subsists between each of them and the corresponding result of last problem : () P*~ _ j (TO) 275. When the assurance is uniform this expression becomes, A.=^ -a , ' " Ill which is given by Mr. Milne, p. 169, for the value of an assurance in terms of two adjoining annuities. 276. The remarks in (270) on the examples illustrative of Problem XVII., are equally applicable to those just given. It is sufficient, therefore, here to direct attention to them. 277. Some general remarks on the variable benefits discussed in the last two problems have been reserved for this place. 278. (1.) The formulae deduced are equally applicable when the benefits depend on the joint continuance of two or more lives. The only change they require is that of x into x.y, &c. 279. (2.) If either of the benefits is not to be entered upon till after the lapse of n years, its present value will be found, as in the case of uniform benefits, by multiplying the value of the whole life benefit, at the age then attained, by v n p xn (218.) But a temporary increasing benefit requires different treatment from that of a temporary uniform benefit. And not only so, but the treatment will vary with every variation in the law of increase. We shall confine our remarks to the case of a uniformly increasing annuity, that is, one whose suc- cessive payments are to be 1., 2. } 3., &c. Suppose that this annuity is to cease after n payments have been made. If we deduct from its value for the whole life, the value of a similar annuity deferred n years, it is obvious that the annuity we leave is one of 1, 2, 3, .... n, n, n y &c., to the end of life. We thus cut off, not all payments after n years, but only the increase at and after the expiry of that term, and there remains, therefore, to be deducted the value of a uniform annuity of n pounds deferred n years. Hence we have for the value of the temporary annuity in this case, that of the similar annuity whose increase only is arrested being, VrirftJU* 280. (3.) By combining, in the way of addition and subtraction, the values of the various benefits with which we have been occupied, we obtain the values of a great variety of benefits, both increasing and decreasing. A very few examples of the simplest kind may suffice for illustration. The present value of an annuity of 5., increasing by 10 shillings per annum, will be 4*\a x + \i x ; that of an annuity of 100, 105, 110, &c., pounds, will be 950^+5^; that of an annuity of 100, 95, 90, &c., pounds, to be extinguished in 20 years, will be a t+w ) -5 P,-*>p rfo (*, +!10 + 20 I+ao )] (279) ; 112 which after a few obvious transformations is changed into, that of an annuity of I 2 , 2 2 , 3 2 , &c., pounds, will be i x and so on. 281. SCHOLIUM. If we denote by P^ the present value of an annuity upon (x), whose successive payments are to be the terms of the polygonal numbers, of the denomination m, then will the following equation always subsist, from which, by a continuous process, the values of P^ for each value of x may be successively deduced. And from these, by a process similar to those of Problems XVII. & XVIII., the values of an annuity for each age, whose payments are to be the pyramidal numbers of the denomination m, may likewise be derived. But such speculations being matters of curiosity rather than utility, we do not farther insist upon them. PROBLEM XIX. 282. To construct a table of the present value of a sick allowance of 1. per week, to cease at a specified age, and commencing at each younger age. 283. The data requisite for the solution of this problem are, the average quantity of sickness experienced during each year of existence by each of the lives that enter upon that year, and, as in previous problems, the probability of a life at each age surviving a year. De- note the first, expressed in weeks, for age #, by s f ; and the second, as usual, by p x . Denote also the present value of the benefit by S x . 284. If we suppose that the sickness of each year is uniformly distributed over that year, then, interest also accruing uniformly be- tween the periods of its conversion into principal, it will follow that the value, at the commencement of the year, of the payments to be made on account of sickness in the course of it, will be the same as if the whole were made at the middle of the year. Hence, the present value of one pound to be received half a year hence being 1 -=- (1 + \r), (49.50), which call w, the value of the benefit in respect of the first year will be ws x ; and the value in respect of the subsequent years being vp x S x+v (193), we have for the whole value of the benefit, s, or, in logarithms, 113 285. This formula gives the following type of operation : B^C.* B 7 C. F, log.S, + l lg-% S, + i / ar.co.(B C) s r 5 log.S, + 1 log.v/^ s~i B-C *. A B C D E F A B C D E F |F l+ A l=log.^ r S, + 1 |F 1 + A t=log.qp,S, + 1 }og.ws x B-C T^ar.co^B-C)] \og.ws x JT, [B-c] |C + D+E t=log.S, rC + D + E l=log.S, 286. For the initial value, S x+l vanishes when x is the age next younger than that at which the benefit is to cease ; so that for this age we have, log.S,=tog.tp*,. 287. It will be observed, that for the application of this formula two subsidiary series are requisite, namely log.ws^ and log.t^ r . The latter series for the Carlisle Table, (interest 3 per cent.,) we have al- ready formed, and have had occasion very frequently to use, but the former has not hitherto come under our notice. Friendly Society data usually comprise both a sickness and a mortality table, and the latter is in no case identical with the Carlisle Table. If we select existing data then, we shall have to form both the foregoing series before we can apply our formula to use. This is a simple matter. 288. We shall employ for our examples the Useful Knowledge Society's data, as contained in Mr. AnselFs " Treatise on Friendly Societies." The values of s x for each age are found at p. 70, and of p x , also for each age, at p. 118, of the work cited. The series wanted then, are the logarithms of s x) each increased by the constant logarithm 993534=log.(l-r-l'015)=log,^, and the logarithms of p xt each in- creased by the constant logarithm 987163 =log.#. 289. We are now prepared for the examples which follow : * In computing the values of this benefit it can hardly ever be requisite to use the form of operation typified for the case B ^ C. Such a relation of the quantities occupying the lines so marked, can rarely have place. It has been thought well, nevertheless, not to depart from the customary form of the type. 114 Present Values of Sick Allowances. 1. per wee 69 997253 9-93695 961305 c till age 70. 64 532979 967772 i. per week till age 60. 59 473685 2-97636 971311 958558 500/51 444996 931002 0-027556 314998 29 641699 859052 915278 46 438827 0-006169 304091 34 68 246029 17-6200 962894 63 557023 36-0597 968/58 58 742952 5-53289 972082 208923 525781 715034 866913 342010 504859 7 594616 931165 979228 59 406163 -308871 482317 48 67 S 23 ' 5385 62 573903 37-4889 969648 57 888528 7-73620 9/2828 336079 543551 861356 805511 530568 642696 53 551162 992389 034398 81 3/5551 485805 608585 4 66 448260 28-0711 965552 61 585641 38-5160 970521 56 984140 9-64140 973548 413812 556162 957688 747270 666542 751264 35 510994 045168 082581 63 346873 610815 705976 12 65 498569 31-5188 966673 60 593638 39-2318 971311 55 052861 11-2944 974237 465242 564949 027098 692591 772651 840344 44 473685 091264 125049 60 319870 707228 785020 24 64 532979 34*1176 59 598794 39'73 * * * 54 104914 12-7325 * * * 290. The values of the first of these benefits, for each age, are given by Mr. Ansell, at p. 133, and may be compared with those here determined. 291. The formula of (284) by a slight transformation becomes, (w s --* and this gives another mode of construction, which may be used either alone, or to verify the results of that just exemplified. 292. The type corresponding to this formula is as follows : 115 EI ZA E l7 A. E i lS-S, + i s *+i E i lo S- s , + i s ,+l A log.. v p x /Tj^ A \ A l s %'p Ej-A B \og.vp s B log.vp x C Ej A C N D T 1 [ar.co.(B 1 A)] D jTaLEi-A] E l=log.S, g. E rA+B-l-C + D Ulog.S, 8. fl O An additional series here required is log.. - for each age. This is w equal to log.^-fcolog./^+log.-, the last logarithm being constant, and equal to log. w log.v= '006371. This series will therefore be easily formed. 293. We give an example of the application of this formula : Present Value of Sick Allowance. i. per week till age 70. 69 997253 9-93695 68 67 66 65 64 * 969697 961305 314998 39 0-027556 17*6209 342010 23'5385 530568 28-0711 666542 31-5188 772652 34-1176 * 246029 904019 962894 504859 7 371779 841211 964300 642696 53 448260 781718 965552 751264 35 498569 725917 966673 840344 45 532979 * 116 294. It will appear, on comparison of this operation with the first example of (289), that the tabular arguments in both are the same. The reason of this is obvious. In the one case the argument is nj o log.vp g S x+l log.ws x , and in the other log.S, r+1 log.- . =log.S, +1 - 295. This operation, when the requisite subsidiary series have been formed, is on the whole rather simpler than the other ; and being more assimilated to previous operations it ought, perhaps, on that account to be preferred. Neither operation possesses any analytical advantage over the other. 296. SCHOLIUM. Existing tables of the values of sick allowances have no doubt been computed by one or other of the formulae here deduced for the purpose, applied by means of the common logarithmic tables. But the only source of distinct information on the subject with which the author is acquainted, is a paper by Mr. Woollgar, in the concluding number of the " Savings Bank Circular," (September, 1847,) which contains a detailed example of the actual computation. Mr. Woollgar there remarks, in a note, " Mr. AnselFs is the only work that professes to give the method of calculation ; and, although that author devotes six pages to introductory considerations, he breaks off just at the point where the actual process ought to be explained." CHAPTER VIL OF COMMUTATION TABLES. 296. TABLES of the kind called Commutation Tables differ in a most important particular from those with the construction of which we have hitherto been occupied. They afford, by inspection, no informa- tion whatsoever as to the value of any one benefit. They nevertheless furnish us with ample and most readily available means of determining the value of any benefit that may be named. We defer for the pre- sent any general remarks we may have to offer on the subject of these tables, and proceed at once to describe their form, give a summary of their leading properties, and explain the most commodious methods of constructing them. 297. A single life commutation table consists of two sets of columns, called respectively, from the purposes to which they are applied, an- nuity and assurance columns. The columns are designated by letters, arbitrarily chosen, placed at the top, and there is in each a value cor- responding to each year of age. The letters designating the annuity columns are D, N, S, and those designating the assurance columns are C, M, R. The value in any column corresponding to a specified age, is denoted by the letter which designates the column, with the age suffixed. Thus, D 20 , N 20 , &c., denote respectively the values in co- lumns D, N, &c., corresponding and placed opposite to, age 20 ; and D x , N,, &c., denote the same for age x. 298. Columns D and C form the foundations of the table. From these the remaining columns, in virtue of one of the simplest conceiv- able relations, are readily derived. The composition of those funda- mental columns is as follows : 299. If l x denote, as before, the tabular number who attain x years of age, the number who die in the following year will be denoted by Jje ^t+i ; and if v* denote the present value of 1. to be received in x years (50), we have, .=/,; andC.=+>(/.-/, +1 ). 118 300. The following relations then subsist : the series in each case extending to the end of life. 301. From these the following are obvious: B.=M,+E^ I 302. The following also are easily deduced : ST\ ~ == u 303. Let N-N- 304. Then are M.-M. + .=M - . 1+ >,+._, 305. Moreover, 306. By means of the last three formulae the assurance columns may be dispensed with, or their place may be supplied when they are not tabulated, as is sometimes the case, especially with respect to joint lives. The expressions also serve as formulae of verification in the construction of the tables. 307. An intimate acquaintance with the foregoing formulae is highly advantageous for the simplification of expressions that occur in the treatment of complex problems. A larger collection will be found in the "Companion to the Almanac" for 1840 and 1842. 308. The meanings above given to S x|n and R^ differ somewhat from those assigned to the same symbols by Professor De Morgan, the author of the papers just cited. The meanings here adopted are equally convenient with those of the learned professor, and we venture to think rather more in accordance with analogy. Mr. Farr has made the same departure from previous usage, as is here done, in his Appendix to the Sixth Report of the Registrar-General, p. 329, folio edition, and p. 595^ octavo edition. 119 309. It has been already shown (185, 218) that the present value of an endowment of 1. on (x), that is, of 1. to be received in n years if (#) be then alive, is v n .l x+n -r-l x ', and that the present value of an endowment assurance of \. on (#), that is, of 1. to be received at the end of n years, if (x) shall have died in the preceding year, is vn (l x +n-\~lx+n)~*~L' Multiplying numerator and denominator of each of these expressions by v x , we have, Present value of endowment endowment "I assurance J =~j)> ( 2 ") 4--l~(r+J V> D 310. From these two expressions, that for the present value of any benefit that may be proposed is very easily derived, by means of the relations in (300) . . . (305). We content ourselves, however, with here giving, in a tabular form, the expressions for what may be called the simple benefits ; premising that, as the denominator for a present value is in every case D^, it is sufficient to tabulate the numerators. 311. The present value of an Endowment of 1. on (x) Endowment Assurance of) 1. on(ff) ) Annuity of 1. on (x) . . Assurance of 1. on (x) Increasing Annuity of Increasing Assurance of To be re- ceived in n years, is For For the first n years, is After the first years, is For n years after k years, is Uniform after n years, is PROBLEM XX. 312. To construct column D for single lives. 313. Since, (299), T> x =v*l x , and D =* whence, D,=D, +1 . or, in logarithms, log. D, t =log.D, c+1 4-colog.^, 1 .. 314. From this expression the mode of construction is obvious. The value for the oldest tabular age being first formed, the others are 120 successively produced by the continual addition of the terms of the series colog. vp x , the formation of which was explained in (106). 315. Or, a commencement may be made at the youngest age, and the logarithmic values successively formed by the continual addition of the terms of the series log.vp x ; for or 316. Examples of both these modes of formation are here given. Formation of Column D. One Life. First M< log.Z 104 000000 log.0 lw 664929 Jthod. ii 667069 4645-89 014791 10 681860 4806-84 015050 Second o 000000 914585 I 914585 9506(55 Method. 94 395361 862224 104 664929 -046231 489958 95 257585 871769 103 154887 '142852 234686 9 696910 4976-34 015704 2 865250 958011 96 129354 880708 102 389573 '245230 158965 8 712614 5I59'57 016674 3 823261 970364 4 793625 974506 5 768131 979362 97 010062 8/8018 98 888080 882428 101 548538 -353621 121983 7 729288 5361-53 018205 100 670521 -468297 099987 6 747493 559i'05 020638 5 768131 5863-15 025494 99 770508 900013 99 770508 -589533 117572 6 747493 981/95 100 670521 878017 101 548538 841035 98 888080 -772823 121982 4 793625 6217-63 029636 7 729288 983326 97 010062 1-02344 119292 3 823261 6656-73 041989 8 712614 984296 102 389573 765314 96 129354 1-34696 128231 2 865250 7332-46 049335 9 696910 984950 103 154887 510042 95 257585 1-80961 137776 i 914585 8214-57 085415 10 681860 985209 104 664929 94 395361 2-48520 * * * o 000000 i oooo-o * * * ii 667069 * * 317. Verification is obtained by means of the fundamental formula D .=&L. log./ 1M =954243 log.0 100 =716278 log.D 10 o=670521 log.Z 94 =602060 log.?? 94 =793301 log.D 94 =39536l log.fc =832317 log.t? 5 =935814 log.D 3 =768131 318. The column may also be constructed without the previous formation of any other series than \og.p x -, thus, log.D a<+1 =log.D a .+ l&Px + log- 17 - And log.0 being constant, it will be sufficient to write it once for all at the bottom of a card, to be held in the hand over the other two logarithms to be added, and moved down for each new addition. If this method of construction be employed, it will be well to use log.v to two places more than are to be finally retained, that is, 121 Formation of Column D. Third Method. to two more than there are in log. p x , annexing 5 also, in the first of those places, to the initial logarithm, as in (45). The two additional places being struck off at the close, the values formed will then be true to the nearest figure in the last place retained, with- out any alteration. An example of the mode of formation now described is given in the margin. The results, when two figures are cut off, may be compared with those already found. 319. For the method of verifying these values, that described in (317) having respect to the logarithms only, reference is made to (330). 320. COROLLARY. When the natural numbers corresponding to the foregoing logarithmic results have been taken out, the formation, in numbers, of Columns N and S is easy. The operation, by means of the formulae of (300), is as follows : 000000 5 927422 987162 78 5 6 7 8 9 * 768131 40 992199 987162 78 914585 28 963502 987162 78 747493 18 994633 987162 78 865250 06 970849 987162 78 729288 96 996163 987162 78 823261 84 983201 987162 78 712614 74 997133 987162 78 793625 62 987343 987162 78 696910 52 * 768131 40 Formation of Column N in numbers. 103 -046231 142852 102 '189083 245230 Formation of Column S in numbers. 103 -046231 189083 102 101 IOO 99 98 97 96 95 94 93 * 2 353i4 '4343^3 669627 787934 101 100 99 98 97 96 95 94 93 * 434313 353621 787934 '468297 i'45756i 1-256231 1-256231 589533 2-713792 1-845764 1-845764 772823 2-618587 1-02344 4'559556 2-618587 7-178143 3-64203 3-64203 1-34696 10*82017 4-98899 6-79860 22-60776 9-28380 31-89156 * 4-98899 1*80961 6-79860 2-48520 9-28380 * 122 PROBLEM XXI. 321. To construct Column C. 322. Since, (299,) and Hence, or, in logarithms, log.C, = log.C, + 1 + colog.tfj^ j + A log. (p x+ j 1 ) . 323. This is the formula by which the required construction is to be effected. The series colog. vp x occurred in one of the formulae of last problem, and A log. (p x ~ l l) is one of the series contained in the Elementary Table. 324. The initial value, which is that wherein x is the oldest tabular age, is found from the formula G x =v x+l l x , to which the general for- mula for C, is reduced by the vanishing in this case of l x+r There is also a peculiarity in the logarithmic formula above given, when applied to the next younger age. Here co\og.p x+ 1 = OC, and log. ( p x+ l ~ 1 l) = OC. Hence for this age we have, log.C.,. = log.C ^ j -f colog.v -f log. (p x ~ l 1) . 325. From this point the computation goes on in accordance with the formula first deduced. An example is here given : Formation of Column C. One Life. 000000 log.0 105 104 colog.0 103 1 02 652091 652091 012837 301030 965958 489958 522879 978795 234686 778151 044884 092461 095235 101 991632 -098092 158965 853872 100 004469 -101034 100 004469 -101034 121983 890855 99 017307 -104066 099987 088941 98 206235 -160781 117572 020204 97 34401 1 -220806 121982 98/765 96 453758 -284287 123 326. Verification is procured by reference to the fundamental ex- pression for C, (299). Thus : log.(/ 96 -/ 97 )=log.(23-18) =698970 log. v Q7 = 754789 log.C 96 = 453759 327. Comparison may also be made from time to time with Column D, by means of the proper one of the formulae in (305). Thus : Log.D 96 (316) = 0-129354 log.v = 1-987163 dD 96 = 1-30773 0-116517 097= 1-02344 C 96 = 0-28429 328. If none of the subsidiary series have been formed, each value in this column must be constructed independently, although with much greater risk of error, as no verification can then be had, except by separate comparison of each value, till Column M is formed. 329. COROLLARY. From Column C, in numbers, Columns M and R are formed agreeably to the formulae in (300). An example of the formation of the first few terms in each of these columns is here given. Formation of Columns M and R in numbers. 104 103 IO2 IOI IOO 99 98 97 96 95 94 93 * M. 044884 092461 ' J 37345 095235 232580 098092 330672 101034 431706 104066 535772 160781 696553 220806 '9 T 7359 284287 1*201646 409943 1-611589 603203 2-214792 869818 3-084610 * 104 103 IO2 IOI IOO 99 R. 044884 137345 182229 232580 414809 330672 745481 '43 I 7 6 2-4095I2 917359 3-326871 1*201646 '439508 124 330. These values may be verified by the formulae in (305), and to avoid unnecessary trouble it will be well to make the requisite verifi- cations before completion of the various columns. Thus, the numbers to be added being set down in their places, they may be summed in groups of ten or twenty, according to convenience ; and these sums, which will of course be terms of the series in hand, being found to stand the test of the formula of verification, sufficient presumption is thereby afforded for the accuracy of the intermediate terms, if the final additions shall be correctly made, which the terms already ascer- tained furnish the means of readily determining. 331. The formula? of verification are applied as follows : ^=9-28380 log.0-967726 \-v , 2-464284 (1 r)N 93 = '27040 1-432010 094=2-48520 893=31-8916 1 v (1-0)893= '92888 ^=9*28380 1194=8-35492 log.l;503676 2-464284 , f-967960 PROBLEM XXII. 332. To construct Column N in logarithms. 333. Since, (301), N,=N, Hence, (I), 334. This gives the following type of operation D,>A. TJar.co.^-A)] rA+B + C l=log.N, D, A) log.N, 335. It will be noticed that in this operation, besides log.N^, we form also log.a x . This, for age a?+l, being equal to log.N >r+1 * These two D's must be distinguished from each other. The one designates the value occupying the line D in the type of operation, and the other a value in the Column D of the Commutation Table. 125 1 , it will be found, when the form first typified is used, (which will never be requisite for more than two or three values,) in the line B, and when the second form is used, opposite the line A, in the adjoining column, being in the latter case the tabular argument, and in the former its arithmetical complement. This operation, therefore, and that of (207), will serve most effectually to check and verify each other. Log.(l + J is also formed, agreeably to (209). 336. Since N z =D, s+1 + N,p 41 , it follows that, when x is the next to the oldest tabular age, N. r = D, i;+1 , and hence, log.D corresponding to the oldest tabular age is the initial value. 337. An example of this operation is here given : Formation of Column N in logarithms. 103 IO2 IOI IOO 99 664929 046231 0-489958 189083 112921 434312 089264 787932 225968 1-25623 99 099069 1-25623 328561 1-84576 378095 2-61858 408004 3-64202 431988 4-98897 * 154887 510042 611723 2/6652 389573 887079 361150 770508 495626 41 98 266175 888080 529919 67 637802 548538 347916 35 97 418066 010062 551277 3 896489 96 561342 670521 428505 43 129354 568593 64 099069 95 698011 * * 338. COROLLARY. From the logarithms of Column N determined as above, those of Column S may by a like process be deduced. The relation being S X =S^ +1 + N X , (301), we have, log.S^log.N^T^log.S.^-log.NJ, (I.) ; and for the initial value, when x is the next to the oldest tabular age, log.S. r =log.N, B . It is unnecessary to give an example of this operation. PROBLEM XXIII. 339. To construct Column M in logarithms. 340. Since, (301), M,=M, +1 + C X .-, log.M^log.C.+T^og.M.^-log.CJ ; which gives the following type of operation : 126 D,>A. DI log-M I+1 M. + , A log-C. A log.C, B Dj A B 1 C T^ar.co.^-A)] C JT^D^A] I) rA-fB + C l^logjf. M, D rA + B + C M, 341. For the initial value, we have, when x is the oldest tabular age, log.M x =log.Cv 342. An example of this operation is subjoined : Formation of Column M in logarithms. 104 103 IO2 IOI ioo 635188 -431706 343. Verification may be obtained by one of the formulae in (305) as follows : log.N 96 =0-561342 log. (l-t;)= 2-464284 1-025626 log.D 97 =0-010062 1-015564 (1-952474 T 2 [l -015564] = { 5 652091 044884 0-313867 137345 159017 232579 374939 330671 514927 ioo 635188 431706 617880 535772 522744 696554 498944 917360 * 965958 686133 485721 017308 711607 65 137812 978795 387766 10 99 728980 206236 636685 34 366571 98 842955 991632 527737 27 344011 618496 33 519396 004469 630698 21 97 962540 * * 127 345. We now enter on the subject of Commutation Tables for two joint lives. In these tables the pairs of lives subsisting at the successive ages, take the place of the single lives so subsisting in the tables which formed the subject of the last four problems. And as these last named tables answer all the questions that can be proposed in regard to a single life, so the tables for the joint lives answer all the questions that can arise in regard to a pair of lives. The formulae of (300. ... 311) will be adapted to a pair of lives, (x) and (y), by simply writing in them x.y for x. Other formulae for joint lives will be found in Professor De Morgan's paper on the subject, in the " Companion to the Almanac " for 1842, and we may advert to one or two of them presently. 346. In the single life Commutation Table D x is v x l x . But it might be v k l x> where k is any function of x which increases by a unit, when x increases by a unit. Such a function is x+t, where t is any number independent of x. And the sole reason for selecting from all the suitable values of A: that in which /=0, and consequently k=x, is that thereby a degree of symmetry is imparted to the value of D, which it would not otherwise possess. These remarks apply likewise, to a certain extent, to a joint life Commutation Table. That is to say, all the questions that concern two lives may be answered by means of tables in which the exponent of the power of v which appears in D xy is any function of either x or y or both, which increases by a unit when both x and y increase by a unit. But here certain advantages, by no means unimportant, are gained by a judicious selection of the function to be employed. If we use a function of either x or y only, a consequence is that in the case of benefits depending upon an assigned order of failure or survivorship amongst two lives, two formulae become necessary, the one for use when the failing life, and the other for use when the surviving life, is the elder of the two given lives. This needless and troublesome multiplication of formulae is avoided by choosing for the exponent of v a function in which us and y are symmetrically involved, and which fulfils the condition already specified. Such a function is \(x+y], and when this is adopted, we have ^ xy =v^ (x+9 ^ x , y > 347. This form of the joint life Commutation Table was proposed by Professor De Morgan, first in the " Philosophical Magazine," and, subsequently in his paper already cited, in the " Companion to the Almanac" for 1842; and in the only tables of the kind since published, viz. those of Mr. Farr, in the Sixth Report of the Registrar- General, this form has been adopted. In most of the previously published tables, including these of Mr. Davies, Mr. Jones, &c., the exponent of v in D xy is the greater of the two,, x y y. It is to be hoped that all future tables will be of the form shown to be the more advantageous. 128 In what follows, however, the construction of both forms will be ex- plained. PROBLEM XXIV. 348. To construct Column D for two joint lives. 349. (1.) When log-vp xy for all ages has been formed (124). and D xy =v a l therefore, in both cases, D. whence, or, in logarithms, or = x+l.y+l + !.,+ ! 350. By this formula, commencing at the youngest age, the column may be constructed in logarithms, and verification will be obtained by means of the proper one of the fundamental expressions, log.D, y = \og.l x -f log./y -|- log.v*, or, \og.T> xy =\og.l x +log.l y + log.v^ x+ y\ 351. The following are examples : Formation of Column D. Two Lives. First Method. I. DAVIES'S FORM. D xy =:v x l f ... log.Z 000000 logJ 000000 log.vo 000000 log.? 000000 log./, 927422 log.t? 987163 x y=2. log./ 000000 log./ 2 890924 log.02 974326 o.o 000000 i oooooooo 842007 i.o 914585 82145700 878087 2.0 865250 73324600 885433 i.i 842007 69503500 914167 2.1 792672 62040000 921513 3.1 750683 56322600 933866 2.2 756174 57039200 928860 3.2 714185 51782800 941213 ' 4.2 684549 48367000 945355 3.3 685034 48421000 953565 4.3 655398 45227000 957707 5.3 629904 42648500 962563 4.4 638599 43511000 961849 5.4 613105 41030300 966705 6.4 592467 39126200 969148 5.5 600448 39 8 5i8oo 971561 6.5 579810 38002300 973994 7.5 561605 36442300 975525 6.6 579009 37325800 976428 7.6 553804 3 5793 5 oo 8.6 537130 344453 oo 7.7 548437 353539 979489 8.7 531763 34022200 980459 9.7 516059 32814000 981114 8.8 527926 337 2 3 981429 9 .8 512222 3^5400 10.8 497173 31417600 982342 o.o 509355 32311400 982739 10.9 494306 31210900 982997 11.9 479515 30165800 982851 10.10 492094 31052300 * * * 1 1. 10 477303 30012600 * * * 12. 10 462366 28997900 * * * 129 II. DE MORGAN'S FORM. D x y=i.* log.7 000000 log.fj 927422 log.* 993581 logJ log./ log-* 2.0 4 .2 5-3 6.4 7-5 8.6 9-7 10.8 11.9 i.o 921003 83368700 878087 2.1 799090 62963700 921513 3.2 720603 52553600 941213 4.3 661816 45900300 957707 5.4 619523 41641200 966705 6.5 586228 38568100 973994 7.6 560222 36326300 977959 8.7 538181 34528800 980459 0.8 518640 33009600 982084 10.9 500724 31675500 982997 1 1. 10 483721 30459400 12. K * * * # And examples of the meth DAVIES'S FORM. log./ 12 =806180 log.J 10 =810233 log.t? 12 =845953 log.Di2.io=4 62366 890924 ,o m 755,4300 763520 58012300 933866 4.2 697386 49818000 945355 5.3 642741 43928000 6.4 605304 40299900 969138 7.5 574442 37535500 975525 8.6 549967 35478700 978929 9.7 528896 33798400 10.8 510010 32360100 982342 1 1. o 492352 31070800 982851 12.10 475203 29867800 log. TO 000000 log.Z 3 861773 f log.0 980744 3.0 842517 897786 4.1 740303 938008 5.2 678311 950211 6.3 628522 964996 7.4 593518 970669 8.5 564187 976495 9.6 540682 979584 10.7 520266 981371 1 1. 8 501637 982197 12.9 483834 982774 13.10 466608 69585200 54992400 47677200 42513000 39220900 36659500 34728200 33 T 33400 31742200 30467300 29282500 * DE MORGAN'S FORM. log.fo =806180 log.7 w =810233 log.0 11 =858791 log.D 12 .io=4 75204 352. (2.) If \og.vp (xy) have not been formed, we may avail ourselves of \og.vp x , (101), or co\og.vp x , (106), and construct the table by either of the following formulae : lo S- D *+ 1 . y + 1 = kg-I commencing in the first case with the younger ages, and so proceeding to the older, and in the second case beginning with the older, and pro- ceeding thence to the younger. 353. Some examples of this method of construction follow : * When x y=0 the two forms of the table coincide. It is therefore un- necessary to repeat the construction for difference 0. 130 Formation of Column D. Two Lives. Second Method. I. Commencing w DAVIES'S FORM. logJ 000000 log.fc, 890924 log.i? 2 974326 ith the Younger Ages. DB MORGAN'S FORM. log.Zo 000000 log./ 2 890924 log.v 987163 II. Commencing \ DAVIES'S FORM. log.* 000000 log./ 102 698970 log.w 104 664929 nth the Older Ages. DE MORGAN'S FORM. Iog./io4 000000 Iog./io2 698970 log.0 103 677766 2.0 865250 914584 970849 3.1 750683 950665 983201 2.0 878087 914584 970849 104.102 363899 489958 146128 104.102 376736 489958 146128 3.1 763520 950665 983201 103.101 999985 234687 109145 103.101 012822 234687 109145 4.2 684549 958012 987343 4.2 697386 958012 987343 102.100 343817 158965 087150 102.100 356654 158965 087150 5.3 629904 970364 992199 5.3 642741 970364 992199 6.4 605304 974505 994633 101.99 589932 121982 104735 101.99 602769 121982 104735 6.4 592467 974505 994633 7.5 561605 979362 996163 109.98 816649 099987 109145 99.97 025781 117572 106455 100.98 829486 099986 109145 7.5 574442 979362 996163 99.97 038617 117573 106455 8.6 537130 * * 8.6 549967 * * 98.96 249808 * * 98.96 262645 * * 354. (3.) If neither log.vp^^ nor log.^ have been formed, the table may still be constructed by either of the following formula : -,+ 1 .9 + 1 - tog-D,., = D *+ 1 . y + 1 + colog.jp, + oology + log. (l + r). 355. It will be proper, in using this method, to employ the con- stant logarithm, v, or 1 + r, as the case may be, to two places more than are to be finally retained (43). The first of these additional places also being, in the initial value, increased by 5, the mere cutting off of two figures at the close will leave the values formed true to the nearest unit in the last place retained (45). 356. The following are examples of this method of construction : Formation of Column D. Two Lives. Third Method. I. Commencing wii DAVIES'S FORM. log./o 0000005 log.Z 2 890924 log.v 2 974325 56 h the Younger Ages. DE MORGAN'S FORM. log.Zo 0000005 log.7 2 890924 log.0 98/16278 II. Commencing ^ DAVIES'S FORM. log./iM 0000005 Iog./i 02 698970 log.?; 104 664929 12 ith the Older Ages. DE MORGAN'S FORM. Iog./,o4 0000005 logJ, M 698970 log.v 103 677766 34 2-0 86525006 927422 970849 987162 78 2.0 87808728 927422 970849 987162 78 104.102 363899 62 4/7121 146128 012837 22 104.102 376736 84 477121 146128 012837 22 3.1 750683 84 3.1 763521 06 103.101 99998584 103.101 012823 06 4-2 5-3 6. 4 750683 84 963502 983201 987162 78 3-i 763521 06 963502 983201 987162 78 131 103.101 684549 62 970849 987343 987162 78 4 .2 697386 84 970849 987343 987162 78 IO2.IOO 629904 40 983201 992199 987162 78 5-3 64274162 983201 992199 987162 78 101.99 592467 18 * 6.4 605304 40 * * 100.99 * 999985 84 221849 109145 012837 22 34381/06 146128 087150 012837 22 589932 28 109145 104735 012837 22 816649 50 * I03-IOI 012823 06 221849 109145 012837 22 102.100 356654 28 146128 087150 012837 22 iox.99 602/69 50 109145 104735 012837 22 100.98 829486 72 357. If tables have to be constructed for several values of x y, it will obviously be well worth while, as a preliminary step, to form log. vp x . The saving of labour effected by the use of this series is visible on comparison of the second and third methods of construction just explained. The trouble of writing down the constant logarithm for each value may, however, be spared by setting it down once for all at the bottom of a card, so that, by being held over the result of each addition, it may easily be taken account of in the next. 358. (4.) A fourth method of constructing Column D, which, when tables for all values of x y are to be formed, is preferable to every other, will now be explained. It will be perceived that it is in entire analogy with the method employed in (108) and (124) for the formation of the series log.p( ) and log.vjt?^ ). 359. For Davies's form of the table we have, (x >y), D=** and n i -^ Or, in logarithms, ,* + 1 360. It thus appears that by the continuous addition to certain initial values of the successive terms of the tabulated series colog.p y , log. D xy for every combination of ages will be formed. The working may be arranged as in the following specimen, except that in practice it will be proper to leave a blank space between every two columns to receive the natural numbers corresponding to the several logarithmic values. It will be noticed also, that here, as in (110), &c., the terms corresponding to each value of xy, and consequently belonging to the same Column D, are found ranged in horizontal lines. Moreover, the terms of colog.j y being only 103 in number, they may be put on cards similar to that shown in fig. 1, (102), and so the whole labour of the operation will be reduced to that of a series of additions of two 132 lines. The horizontal initial series, and other horizontal series, for verification at suitable intervals, may be formed by some one or other of the methods already described, and ought to be inserted in their places before commencing the principal operation. 361. Formation of Column D. Two Lives. Fourth Method. I. DAVIES'S FORM. D =#*/ . x-y o i 2 3 4 5 6 7 8 9 10 y 104 103 1 02 IOI IOO 99 98 97 96 95 94 664929 477121 y 103 IO2 IOI IOO 99 98 97 96 95 94 93 * 632008 221849 y IO2 IOI IOO 99 98 97 96 95 94 93 92 * 088544 146128 y IOI IOO 99 98 97 96 95 94 93 92 #=IOI 393637 109145 y IOO 99 98 97 96 95 94 93 92 90 a?=ioo 624764 087150 ; 98 97 96 95 94 93 92 90 89 * 811901 104735 * * * * * * * 142050 221849 853857 146128 234672 109145 502782 087150 711914 104735 916636 109145 363899 146128 999985 109145 343817 087150 589932 104735 816649 109145 025781 106455 510027 109145 109130 087150 430967 104735 694667 109145 925794 106455 132236 115393 619172 087150 196280 104735 535702 109145 803812 106455 032249 115393 247629 124939 706322 104735 301015 109145 644847 106455 910267 115393 147642 124939 372568 130334 811057 109145 410160 106455 751302 115393 025660 124939 150599 130334 272581 130334 502902 142667 920202 106455 516615 115393 866695 124939 402915 142667 645569 146128 026657 115393 632008 124939 991634 130334 280933 142667 545582 146128 791697 131099 142050 124939 756947! 130334 121968 142667 423600 146128 691710 131099 922796 105390 266989 887281 * 264635 * 569728 822809 028186 * 362. Again, for De Morgan's form we have, Hence, in logarithms, 362. Colog.\/t;.jt? y is the same as ^log.(H-r) + colog./? y , and the mode of its formation for each age was described in (107). Hence, colog./> y in the formula of (359) being replaced by colog. ^/v.p y , a like operation to that last exhibited will produce the logarithms of ~D xy according to De Morgan's form. The remarks in (360) also are equally applicable here, and the initial values in both cases are the same, since, when x=y, v x =v* (x+y \ The following is a specimen of the type of operation: 363. 133 II. DE MORGAN'S FORM. D,. =1 xy I 2 3 4 5 6 7 8 9 10 * 9 104 2 1 02 TOI 100 99 98 97 96 95 94 #=104 664929 483540 rl 103 1 02 101 IOO 99 98 97 96 . 94 93 ^=103! 632008] 228267 L IOI IOO 99 98 97 96 95 94 93 92 # = 102 088544 152547 y IOI IOO 99 98 97 96 95 94 93 92 I 1 #=ioi 393637 115563 y IOO 99 98 97 96 95 94 93 92 9 1 90 #=100 624764 093569 y 99 98 97 96 95 94 93 92 9 1 90 S S #=99 811901 111154 * * * * * * * * * * 148469 228267 376736 152547 860275 152547 241091 115563 509200 093569 718333 111154 923055 115563 012822 115563 356654 093569 602769 111154 829487 115563 038618 112874 529283 115563 128385 093569 450223 111154 713923 115563 945050 112874 151492 121811 644846 093569 221954 111154 561377 115563 829486 112874 057924 121811 273303 131358 738415 111154 333108 115563 676940 112874 942360 121811 179735 131358 404661 136753 849569 115563 448671 112874 789814 121811 064171 131358 311093 136753 541414 149085 965132 1128/4 561545 121811 911625 131358 195529 136753 447846 149085 690499 152547 078006 121811 683356 131358 042983 136753 332282 149085 596931 152547 843046 137518 199817 131358 814715 136/53 179736 149085 481367 152547 749478 137518 980564 111808 331175 951467 328821 633914 886996 * 092372 364. If in either of the two modes of construction last explained it be preferred to commence the computation at the other end of the several series, that is, with the terms belonging to the younger lives, and proceeding thence to those belonging to the older, it is obvious that the series to be added will be the arithmetical complements of the series employed when the computation is conducted as above directed. This order of procedure will be found in various respects less conve- nient than the other. 364. COROLLARY. The construction of the Columns N and S in numbers, readily follows, as in (320), when that of D has been effected. This is shown, as regards Column N, in the following examples : Formation of Column N. Two Lives. In Numbers. I. DAVIES'S FORM. # y=o. 103.103 '04623 .42856 # y=i. 103.102 '13869 71426 # y=2. I03.IOI -23115 '99997 102.102 '47479 1-22615 102. IOI '85295 1*71661 IO2'IOO 1-23112 2*20707 101. 101 1-70094 2'47535 lonoo 2-56956 3-18260 101*99 3'438i9 3-88985 100.100 4-17629 4-21467 100.99 5-75216 100.98 7-32804 6-55615 99-99 8-39096 6-48486 99.98 10-90343 8-25346 99.97 13-88419 io'6n6 98.98 14-87582 * * 98.97 19-15689 * * 98-96 24*4958 * * 134 II. DE MORGAN'S FORM. x y=i. 103.102 IO2.IOI IOI.IOO IOO.99 99.98 98.97 14076 72490 '86566 I'742I7 2-60783 3*22998 5-8378I 5-22797 11-06578 8-37636 19-44214 103.101 IO2.IOO 100.98 99-97 98.96 / = 2. 23809 1*02996 1*26805 2-27328 IO3.IOO 102.99 101.98 100.97 99.96 98.95 ^, 33829 I*34396 I-68225 2-81983 4-50208 5-I75I5 3-54133 4-00654 7*54787 6 -75285 9-67723 8-8II50 14-30072 IO-9300 25-2307 * 18-48873 I4'I740 32-6687 * PROBLEM XXV. 365. To construct Column N in logarithms. 366. This is effected in precisely the same way as the construction of the corresponding column in the table for single lives. And the type of operation in Problem XXII. will serve equally for the present problem if for x there we write x.y, and also, of course, x+ l.y+ 1 for #+ 1. The remarks following the type in question are also appli- cable here. A few examples follow : 367. Formation of Column N. Two Lives. In Logarithms. I. DAVIES'S FORM. x y=o. 103.103 664929 -046231 xy=i. 103.102 142050 1-38692 xy=2. 103.101 363899 -231153 632008 0-967079 032921 011570 8538570711807 288193 788875 999985 0-636086 363914 726401 102.102 676499 '474787 102-101 930925 -852952 I02.ioo090300 1-23112 088544 412045 587955 554189 234672 303747 696253 478934 343817 253517 746483 446029 loi.ioi 230688 1-70093 101. 100 409859 2-56956 101.99 536329 3*43818 393637 162949 837051 390102 502782 092923 907077 349972 589932 053603 946397 328658 100.100 620790 4-17628 100.99 759831 5-75216 100.98 864987 7-32804 624764 003974 996026 303022 711914 047917 325640 9 816649 048338 325851 20 99.99 923812 8-39096 99.98 037563 10-9034 99.97 142520 13-8842 811901 111911 360574 6 916636 120927 365674 15 025781 116739 363288 22 98.98 172481 14-8758 * # * 98.97 282325 19-1569 * * * 98.96 389091 24*4958 * * * 135 II. DE MORGAN'S FORM. 103. IO2 148469 '140756 x y=2. 103.101 376736 -238087 e 9=3. I03.ioo529283 -338285 860275 0-71180.6 288194 788874 012822 0-636086 363914 726401 128385 0-599102 400898 696606 I02.IOI 937343 -865652 102.100 103137 1-26805 102.99 225889 1-68224 241091 303748 696252 478935 356654 253517 746483 446029 450223 224334 775666 427523 loi.ioo 416278 2-60782 101.99 549166 3-54133 101.98 653412 4-50207 509200 092922 907078 349971 602769 053603 946397 328658 713923 060511 939489 332339 100.99 766249 5-83780 718333 047917 325640 9 100.98 877824 7-54787 829487 048337 325851 20 100.97 985751 9*67723 945050 040701 321857 1 99.98 043982 11.0658 99.97 155358 14.3007 99.96 266908 18-4888 923055 120927 365674 15 038618 116740 363288 23 151492 115416 362552 9 98.97 288744 19.4422 * * * 98.96 401929 25.2307 * * * 98.95 514053 32-6628 * * * 368. The logarithmic annuities here formed, (335), may be com- pared with those for the same ages in (207). 369. The same relations subsisting amongst the various columns in the joint life table as in the single life table, it is obvious that by means of (305), all the questions in regard to one or two lives that either table enables us to solve, may be solved by the use of Columns D and N alone, with the exception of those relating to benefits that vary in their amount from year to year, and these can be treated by means of Column S. If, therefore, the last mentioned class of benefits be excluded, as when pairs of lives are concerned they do not often require to be considered, we may say that all the purposes of a joint life table can be served by the Columns D and N alone. This pro- perty is taken advantage of to reduce the extent of the joint life tables, a complete set of which, especially if constructed for different rates of interest, would otherwise be of stupendous magnitude, on account of the great number of combinations that two lives of different ages, from one year to about a hundred years, admit of. It is not usual therefore, in the case of such tables, to form more than Columns D and N. The construction of the assurance columns indeed would be a matter of great labour, as Column C for two lives does not admit of a mode of formation corresponding to that adopted in the case of the 136 same column for the single life table.* The formulae for the use of the joint life tables are accordingly adapted to these circumstances, and are always given in terms of D and N only. 370. Before leaving the subject of commutation tables for two lives we offer one or two remarks. (1.) Since Column D, and, in the case of single lives, Column C also, are formed without the intervention of our Tables I. and II., it is unnecessary, and perhaps also undesirable, to restrict ourselves in their formation to logarithms of six places. The use of seven-figure logarithms, if the elementary values have been formed to that extent, will be just as easy, and will give one figure more in the natural numbers. 371. (2.) If it be preferred to form commutation tables without the aid of logarithms, which seems to have been the course pursued by Mr. Jones in the construction of his valuable and extensive set of tables of this kind, methods analogous to those that have been ex- plained for the logarithmic formation, may be devised, by which the operation will be simplified, and rendered very much more easy and certain than if recourse were had to- the direct multiplication of the factors composing the several values to be determined. On this branch of the subject, however, it is not necessary here to enter. 372. (3.) If from these tables we omit the element v, which has reference to the interest of money, they become adapted to questions having reference to the mean duration of life and probabilities of life and survivorship. Thus we have for the curtate mean duration 1 N, of one life.. .. JD/ ( curtate mean duration "I N of two lives.. .. ' ( complete mean dura-1 K N ,-i.g-i + KN,_^ + N, y _ J + N,J tion of two lives. . J V xy probability that (x) UP^+N^-N^.J will die before (y) J D^ By means of these formula, taking the values from Mr. Jones's Table XL., the results of the operations in (146) and (181) may be verified. 373. Mr. Farr, in the Appendix to the Sixth Report of the Regis- trar-General, has recently devised and exemplified various ingenious * If nevertheless it be chosen to encounter the labour of forming the assurance as well as the annuity columns, it will be best to commence with Column M, using the formula (305), and applying it by means of either Table II. or the common tables. 137 modifications of these tables, by means of which a number of most important questions relating to the progress of population and cognate subjects, are determined with facility. But we cannot farther refer to them in this place. 374. (4.) The present value of a survivorship assurance (249,) is assigned with facility by means of the commutation table for two joint lives. Thus we have : By these formulae the values deduced in (255) may be verified. And it will here be observed that, in accordance with (346), when the tables employed are of Davies's form, two formulae are requisite to include every case,* while one suffices when the tables have the form suggested by Mr. De Morgan. 375. On the subject of commutation tables for three joint lives it is not necessary to enter. If ever the construction of such should be undertaken, a guide to the formation of Column D will be found in the explanation and examples that have been given (120 . . 123) (126 . . 128) of the formation of the series log./?^^), between which and the formation in question the same analogy subsists as we have seen to subsist between the operations in (124) and those in (361 . . 363). One thing is of the utmost importance to be attended to. ^ xyz being equal to v k l xyj ,, the value most advantageous to be chosen for k is J (x + y + z) . By the employment of any other value, as remarked by Professor De Morgan, (whose suggestion this isf,) the use of the tables " would become intolerable, from the large number of cases into which different orders of survivorship would require formulae to be divided." * Perhaps we ought to say three, since neither of the two includes the case x=y. t In the " Philosophical Magazine." CHAPTER VIII. OF THE HISTORY OF THE COMMUTATION METHOD. 376. WE close with a few general remarks on the history and com- parative merits of the Commutation Method, also called " Barrett's Method/' of computation. 377. The first account we have of this method is in a paper by Mr. Baily, read before the Royal Society in 1812, but not inserted in the " Philosophical Transactions/' although, as Professor De Morgan re- marks, it would have done honour to any one of the many eminent inquirers whose writings on the subject of life contingencies are scat- tered over the volumes of that work. It was given to the world, some- what amplified, by Mr. Baily, in 1813, as an Appendix to his " Doc- trine of Life Annuities and Assurances." Mr. Baily states that the method was the invention of Mr. George Barrett, of Petworth, in Sussex, who had devoted no less than twenty-five years of his life to the construction of a most voluminous set of tables in accordance with it. For want of encouragement those tables were never published, and the manuscripts are understood to be now in the possession of Mr. Babbage. Mr. Baily gives a full account of the nature and properties of the tables, and applies a small selection from them, which accom- panies his paper, to the solution of various problems. 378. Mr. Barrett's tables differ in several particulars as to form, from those with which we are now familiar. (1.) They contain only three columns, A, B, and C, corresponding, with the variations to be immediately noted, to our D, N, and S, respectively. (2.) A. x is not v x l x , but v*- w l x , where w is the oldest tabular age. (3.) B^ is not A x+1 H-A, c+2 -f , but A^-f- A.,. + l + (4.) They commence with the oldest age instead of the youngest. (5.) Mr. Barrett does not use the decimal point, but denotes its position by prefixing to each tabular value the index of its logarithm. 379. It is to Mr. Griffith Davies that we owe the alterations by which the tables have assumed their present and now well known form. None of these changes, it will be noticed, are essential the principle of the method remains intact. With the exception of problems relat- ing to assurances on single lives, the solution of which is much facili- tated by the addition of the assurance columns, every problem that 139 admits of solution by a table of Mr. Davies's form, admits of solution with the same facility by a table of Mr. Barrett's form. The propriety of, or at least the necessity for, some of the modifications introduced by Mr. Davies may be questioned;* but it is not to be denied that the method owes much to him. Besides the alterations in the structure of the tables to which reference has been made, and the addition of the assurance columns, he effected considerable improvement in the notation, and gave many new formula?. 380. But while cheerfully according to Mr. Davies the merit to which he is unquestionably entitled as an improver and extender of this method, his claims must not be suffered to over-ride or supersede those of his predecessor, Mr. Barrett, so as to warrant calling him the inventor of the method. Something like this is, however, in effect, not unfrequently done. Thus, Mr. David Jones, while throughout his work he calls the method under consideration " Davies' s Method," makes mention of Mr. Barrett's name only twice, and that in a casual manner, (p. 117,) and has, at p. 116, these words : " Mr. Griffith Davies was the FIRST who computed tables of annuities on the above plan," the plan referred to being a portion of the formation of Co- lumns D and N ; and Mr. Jenkin Jones, in his work founded on the Actuaries' Data, says, p. 51 : "The D and N system was FIRST em- ployed by Mr. Griffith Davies, the actuary of the Guardian Assurance Company, and the formula used by him are somewhat analogous to those originally pointed out by the late Mr. Barrett." 381. It seems barely possible that justification of such statements may be sought in the circumstance that, to the eye, Mr. Davies' s for- mulae are different from those of Mr. Barrett. Since, however, this difference vanishes when the formula? of either author are translated into the notation of the other, it is obvious that, having given Mr. Davies credit for his improvements in this respect, there remain no grounds whatsoever whereon to found a claim for him to the origina- tion of the method, or to be considered the first who used it. 382. The work of Mr. David Jones, just cited, which was published under the superintendence of the Useful Knowledge Society, contains a most extensive and valuable set of tables of Mr. Davies' s form, for both single and joint lives. Mr. Jones gives also several new formulae, and effects some farther improvements in the notation. 383. But it is from two papers by Mr. De Morgan, in the " Com- panion to the Almanac" for 1840 and 1842, that the most systematic and complete view, by far, of this method is to be obtained. Along * We notice that Mr. Farr, in his recently published tables, reverts to Mr. Barrett's relation between Columns N and D. 140 with a collection of formulae, unexampled in extent and variety, these papers contains such a development of the principles of their applica- tion, that no one, with a little previous knowledge of the subject,* needs be at a loss in regard to the treatment of any case that may be presented to him. In Mr. De Morgan's hands also, the notation of the method has received several most important extensions. On the whole, the possession of the papers in question is indispensable on the part of every one who would obtain a complete mastery of the subject. 384. It is proper, before going farther, to notice an attempt that has recently been made to deprive Mr. Barrett of the merit of having originated the method of computation which bears his name. The author of this attempt is Mr. E. J. Farren, who, in an ingenious work, entitled "Historical Essay on the Rise and Early Progress of the Doctrine of Life Contingencies in England,"t has, at pp. 64, 65, the following passage : " It may be here allowable to incidentally notice that the original framing of the Column system of calculation referred to, has generally been attributed to the late Mr. Barrett, whose method was published in the form of an Appendix to Mr. Baily's Treatise on Annuities, as re-issued in 1813. That we are principally indebted to this source for the prevalent adoption of the system is undoubted, but a prior embodiment of it will be found in the Treatise of the late Mr. W. Morgan, published as early as the year 1779. The reader generally conversant with such matters, will at once admit the correctness of this assertion, by consulting p. 64 of Mr. Morgan's Treatise, in which will be found a table of the following form, which, though primarily offered merely for the purposes of rectification, has nearly all the inherent qualities of modern arrangements. First Table of the Values of Single Lives. Age. Values of Lives. Values of 1. payable, &c. Sums. 9 2 "OOOOOO 0000332 ooooooo 91 480769 711908 "0000690 '0001436 0000332 '0001022 1-097377 '0002244 0002458 i'5i 2 53i 0003106 0004698 8? 1-93271 0004038 "0007804 86 2-16983 '0005460 '0011842 &c. &c. &C. &C. * Perhaps the writer may be allowed here to refer to a series of papers of his own, on the subject of this method, printed in the " Mechanics' Magazine " for November and December, 1842. They were intended as an introduction to Mr. De Morgan's papers, which contain, avowedly, almost nothing of demonstration. t Smith, Elder, and Co., 1844. 12mo. 141 " Thus, the nature of the third column being represented, (modern notation [Milne's] ) by n av n , that of the fourth may be considered as S( n+l av n+1 ) -, consequently the value of complete and temporary life annuities, &c., would be nearly as readily determinable by these means as if the columns had represented the values of the numerators n av n and S ("?*), as at present in use. (Columns D and N.) "In p. 70 the tabular values are adapted to the common denomi- nator 1000, &c. ; and in p. 74, the system is extended to Joint Lives ; Mr. Morgan concluding the chapter by observing, ' as by these methods the calculations are rendered pleasant as well as expeditious, I hope that ere long some person will undertake them, choosing for his guide the Northampton Table of Observations, which, perhaps, is better fitted for common use than any other/ Mr. Barrett appears to have pursued this recommendation, and to have incidentally detected that the system was capable of further extension and uses, though his unnecessary adoption of the reversal of ages, clearly indicates Mr. Morgan's Treatise to have been the suggestive source/' 385. The purport of the foregoing extract seems to be this : That the " original framing of the column system of calculation/' which has been hitherto attributed to Mr. Barrett, ought to be attributed to Mr. Morgan, in whose treatise " a prior embodiment of it " is to be found ; and that, although Mr. Barrett " appears to have incidentally detected that the system was capable of further extension and uses/' yet the arrangement of the ages adopted by him " clearly indicates Mr. Morgan's treatise to have been the suggestive source." This must be examined in detail. 386. First then, we admit that Mr. Morgan's values, when arranged in columns as in the extract, possess, not nearly all, but the whole of the " inherent qualities " of columns D and N in the modern tables. Mr. Farren's account of the constitution of the column answering to D is not quite correct. The value opposite the age of A, according to Mr. Milne's notation, is not n av n , but n a n .v n , where n is the difference between the age of A and one year. In our notation the value oppo- site age x would be denoted by Pi x ..\v x ~ l ) which may be written this again is qual to l x v x , the value acccording to the modern form, multiplied by the constant factor \--l l v. Whence the possession of the "qualities " in question is manifest. (309. 346). 387. But, secondly, although Mr. Morgan's columns possess the properties of columns I) and N, this was unknown to Mr. Morgan. He constructs them simply to prove the correctness of his annuity values, deduced by another process. This he does by multiplying 142 together the annuity value and the corresponding value in the adjoin- ing column, and finding the result equal to the corresponding value in the last column. He then, with what now we cannot but denomi- nate singular improvidence, throws away his columns, and makes no farther use of them. Now surely this affords but slender grounds for claiming for Mr. Morgan the origination of the " column system of calculation." Not only does he show himself unacquainted with the principal and most valuable properties of his columns, but we have no evidence that he arranged his materials in columns at all, except merely for the purpose of exemplification. Indeed it is pretty certain that he did not. The form they would naturally assume may be seen in Price, vol. i., p. 215, and is very different from that in which they appear in the type quoted by Mr. Farren. We may admit therefore that Mr. Morgan's work contains an " embodiment " of the materials of the column system ; but that it contains an "embodiment" of the system itself we must take leave to deny. 388. Thirdly. Mr. Morgan must be supposed to have known better than any one else what his rights in the matter were. Was his con- duct then, when Mr. Baily's paper descriptive of the new method became known to him, that of a man who felt that his ideas had been appropriated without acknowledgment ? It was not. The idea of claiming the method or its origination seems never to have presented itself to his mind. He appears indeed to have failed to appreciate its value, and to have done what in him lay to prevent its being given to the public. This we have abundant evidence to prove. It has been already mentioned that Mr. Baily^s paper, giving an account of Mr. Barrett's method, although read before the Royal Society, was refused a place in the "Philosophical Transactions." Now it is the known practice of that learned body to refer to the Council, to be adjudicated upon by them, all papers read before the Society ; and Mr. Baily's paper was therefore, of course, subjected to this ordeal. We are furthermore warranted in assuming, that in the exercise of their function of adjudicators, the Council would be guided in a great measure, if not solely, in reference to a particular paper, by the opinion of those of their number who are most conversant with the subject treated of. A list of the council for 1812, to whom it fell to adjudicate on Mr. Baily's paper, is given by that gentleman in his Appendix ; and the only names which can be recognised in it, as those of indi- viduals possessing a competent acquaintance with the subject of life contingencies, are, " William Morgan, Esq.," and " Dr. Thomas Young, For. Sec." With Mr. Morgan and Dr. Young therefore must rest, not only the share belonging to them as members of the Council, of the responsibility of rejecting Mr. Baily's paper, but also the entire responsibility of having counselled its rejection. The supposition is not to be entertained that in this proceeding these gentlemen were actuated by unworthy or improper motives, and we therefore conclude that they did not see, what has been since universally admitted, the value of the method proposed for their approval. This view, as regards Mr. Morgan, receives confirmation from the circumstance that, in the second edition of his treatise, published in 1821, eight years after the appearance of Mr. Baily's Appendix, he took no notice of Mr. Barrett's method, but presented his columns in the same form as in the first edition, and with no other change in the details than the substitution of the new Northampton Table for the old. 389. Seeing then that, when this method was presented to him as the production of another, Mr. Morgan made no claim to it ; that he pronounced it unworthy of publication in the " Philosophical Transac- tions ;" and that, when it had been eight years before the public, and its merits to some extent recognised, he took no notice of it, although he had an opportunity of doing so ; a claim to the origination of it, advanced on his behalf now, cannot possibly be admitted. 390. But, fourthly, Mr. Farren says, that the inversion of the ages in Mr. Barrett's Table, corresponding to their order in Mr. Morgan's columns, " clearly indicates Mr. Morgan's treatise to have been the suggestive source." The inverse order of the ages arises so naturally from the manner of constructing the tables, that we think no one who has attempted this operation for himself, will consider Mr. Barrett's adoption of that order as at all decisive of the question of his having borrowed the idea of his columns from Mr. Morgan. To have de- tected the possession by Mr. Morgan's columns of the properties now known to belong to Columns D and N, would indicate, on the part of Mr. Barrett, the exercise of a degree of perspicacity of a very high order, seeing that, with Mr. Barrett's exemplification of the principle before them since 1813, no one is publicly* known to have made the discovery before Mr. Farren. 391. The present case is strikingly illustrative pf what frequently happens in the progress of discovery. Few great discoveries have been made regarding which it has not afterwards been found that they ought to have been made a great deal earlier. Previous investigators are then seen to have approached the discovery so nearly, that our * The writer claims to have noticed the identity of Mr. Morgan's columns with Columns D and N before the publication of Mr. Farren's Essay. He would hardly have claimed the credit of this now, however, had he not mentioned the circumstance at the time to one gentleman at least, whom he could name if necessary. 144 wonder is often excited at their having missed it. It happened in this case, however, as has not often happened in other cases, that the dis- covery was perfected and promulgated during the life of the investi- gator, whose writings are now said to have contained not merely a germ of that discovery, but the discovery itself. And the silence of that investigator, under these circumstances, must be held for ever to operate as a bar to the setting up in his behalf of a claim to the dis- covery, or at least to the according of such claim if it should be set up. 392. We have now a few remarks to offer on the comparative merits of the two methods of computation, the old and the new, the former as developed in Mr. Milne's treatise, and the latter as exemplified in Mr. De Morgan's papers in the " Companion to the Almanac/' The materiel of the old method consists of three columns, namely, a x , l x , and v*, for every age, or the logarithms of the last two. By means of these the value of any uniform benefit, whether temporary, deferred, or for the whole of life, may be determined. In every case, however, except that of an annuity for the whole of life, an arithmetical opera- tion is necessary, and this operation is more or less complex according to circumstances. The same results are obtainable, according to the new method, by the use of two columns only, namely, J) x and N^., but here in every case an arithmetical operation is necessary. This appa- rently shows an advantage on the part of the old method ; but it is more appearance than reality. It is not often that the value of a whole life annuity is wanted as a final result, and therefore the com- parative merits of the two methods must rest on the comparative faci- lities of the operations requisite in the other cases. Exhibition of the formulae for a few of the cases of most common occurrence will, we think, go far to show with which method the advantage lies. 393. Present value of annuity on (a;), deferred n years. Annual premium for the same (n-\-l payments. N x+n N,T; Present value of annuity to last n years. Present value of assurance for life. v (1 v)a x ; or 1 (1 v)(l +aj IX, 145 Annual premium for the same. 1 N , Present value of assurance deferred n years. Annual premium for the same payable for life. ^^,^-N + 0* Present value of assurance to last n years. Annual premium for the same m payments. 1 -fftj - (1 -f)(,-trp, A+ J t>(N,_,-N, + ._,)-(N,-N t+ J - L \r-l ^x+m-l The same when the number of payments is n. N.-N.+- t / ~~ -XT TVT 394. In regard to these formulae we remark, first, that if applied to more than one life two additional tabular entries, at least, will be requisite in the first set for each additional life, while in the second set no increase will be necessary. Secondly, in the commutation for- mulae we have restricted ourselves to the use of Columns D and N only. Had Column M been employed the effect would have been a most material simplification in all the assurance formulae. Thirdly, by the addition to the commutation table of Columns S and R, one or both, we acquire a power of treating cases in which either the benefit or the payment, or both, vary from year to year. The like power is gained for the old method by the addition to the data of a table of increasing annuities. But although the manner of constructing such a table exemplified in (269) is simpler than any that could have been heretofore adopted, it is much less simple than the method of forming Column S or Column R, as shown in (320.329). The formulae for the variable benefits being, with the additional data, analogous in both methods to those for the corresponding uniform benefits, the examples just given afford the means of forming a judgment as to the compara- tive facilities of the two methods in their application to benefits which increase or decrease from year to year. u 146 395. The considerations just stated, and comparison of the two sets of formulae suffice, we think, to determine the question as to the relative facilities of the two methods. In every instance the superiority belongs to the new method Barrett's Method. Not only is the number of quantities to be dealt with in each case fewer according to this method than according to the other, but the amount of operation to be per- formed upon those quantities is also less, and usually simpler in kind. All this will be more clearly seen from the following example of the arithmetical translation of the formulae in a single case. 396. Required the present value of an assurance of 1. for the next ten years upon a life now aged 30. Carlisle, 3 per cent. 397. The formula by the old method is and the operation is as follows : ko (Jones, p. 290) log. 37054360 Jao ( ' ) colog. 4-2485669 v" ( p. 103) log- 1-8716278 t>>3cuo = '6693153 1-8256307 l-0>33o.io (as above) log. f-8256307 a 40 (Jones, p. 311) 1-2340720 >3o.io4o=ir47368 1-0597027 8-08326 log. 0-9075865 l-r=w(76) 2-4642841 (l-tf)(3o-fl>3o.io04o)='2354348 1-3718706 0(1 10 j03 Ol Log Log(l+tf) X 1 2 3 4 5 6 7 8 9 D. 3-00 00 0434 ")43o 0436 0437 0438 0439 0440 0441 0442 0443 01 0444 0445 0446 0447 0448 0449 0450 0451 0452 0453 02 0455 0456 0457 0458 0459 0460 0461 0462 0463 0464 i 03 0465 0466 047 0468 0469 0470 0472 )473 0474 0475 04 0476 0477 0478 0479 0480 0481 0483 0484 0485 0486 05 0487 0488 0489 0490 0492 0493 0494 0495 0496 0497 06 0498 0499 0501 0502 0503 0504 0505 0506 0508 0509 07 0510 0511 0512 0513 0515 0516 0517 0518 0519 0521 i 08 0522 0523 0524 0525 0527 0528 0529 0530 0532 0533 09 0534 0535 0536 0538 0539 0540 0541 0543 0544 0545 10 00 0546 0548 0549 0550 0551 0553 0554 0555 0557 0558 11 0559 0560 0562 0563 0564 0566 0567 0568 0570 0571 12 0572 0573 0575 0576 0577 0579 0580 0581 0583 0584 i 13 0585 0587 0588 0590 0591 0592 0594 0595 0596 0598 14 0599 0600 0602 0603 0605 0606 0607 0609 0610 0612 .15 0613 0614 0616 0617 0619 0620 0622 0623 0624 0626 16 0627 0629 0630 0632 0633 0635 0636 0637 0639 0640 17 0642 0643 0645 0646 0648 0649 0651 0652 0654 0655 2 18 0657 0658 0660 0661 0663 0664 0666 0667 0669 0671 19 0672 0674 0675 0677 0678 0680 0681 0683 0685 0686 20 00 0688 0689 0691 0693 0694 0696 0697 0699 0701 0702 21 0704 0705 0707 0709 0710 0712 0714 0715 0717 0718 22 0720 0722 0723 0725 0727 0728 0730 0732 0734 0735 2 23 0737 0739 0740 0742 0744 0745 0747 0749 0751 0752 24 0754 0756 0758 0759 0761 0763 0765 0766 0768 0770 25 0772 0773 0775 0777 0779 0781 0782 0784 0786 0788 26 0790 0791 0793 0795 0797 0799 0801 0802 0804 0806 27 0808 0810 0812 0814 0815 0817 0819 0821 0823 0825 2 28 0827 0829 0831 0832 0834 0836 0838 0840 0842 0844 29 0846 0848 0850 0852 0854 0856 0858 0860 0862 0864 30 00 0866 0868 0870 0872 0874 0876 0878 0880 0882 0884 31 0886 0888 0890 0892 0894 0896 0898 0900 0902 0904 32 0906 0909 0911 0913 0915 0917 0919 0921 0923 0925 2 33 0928 0930 0932 0934 0936 0938 0940 0943 0945 094" 34 0949 0951 0953 0956 0958 0960 0962 0965 0967 0969 35 0971 0973 0976 0978 0980 0982 0985 0987 0989 0991 36 0994 0996 0998 1001 1003 1005 1008 1010 1012 1015 37 1017 1019 1022 1024 1026 1029 1031 1033 1036 1038 2 38 1041 1043 1045 1048 1050 1053 1055 1057 1060 1062 39 1065 1067 1070 1072 1075 1077 1080 ld82 1085 1087 40 00 1090 1092 1095 109" 1100 1102 1105 1107 1110 1112 41 1115 111" 1120 1123 1125 1128 1130 1133 1136 1138 42 1141 1143 1146 1149 1151 1154 1157 1159 1162 1165 3 43 1167 1170 1173 1175 1178 1181 1184 1186 1189 1192 44 1195 1197 1200 1203 1206 1208 1211 1214 1217 1219 45 1222 122f 1228 1231 1234 1236 1239 1242 1245 1248 46 1251 1254 1256 1259 1262 1265 1268 1271 1274 1277 47 1280 1283 1286 1289 1292 1295 1298 1301 1304 130- 3 48 1310 1313 1316 1319 1322 1325 1328 1331 1334 133" 49 1340 1343 1346 1349 1352 1356 1359 1362 1365 1368 1 2 3 4 5 6 7 8 9 TABLE I. Log Log (l + x) X 1 2 3 4 5 6 7 8 9 D. 3-50 O'OO 1371 1374 1378 1381 1384 1387 1390 1393 1397 1400 '51 1403 1406 1410! 1413 1416 1419 1423 1426 1429 1432 52 1436 1439 1442 1446 1449 1452 1456 1459 1462 1466 3 53 1469 1472 1476 1479 1483 1486 1489 1493 1496 1500 54 1503 1507 1510 1514 1517 1521 1524 1528 1531 1535 55 1538 1542 1545 1549 1552 1556 1560 1563 1567 1570 56 1574 1 1578 1581 1585 1589 1592 1596 1600 1603 1607 57 1611 1614 1618 1622 1625 1629 1633 1637 1640 1644 4 58 1648 1652 1656 1659 1663 1667 1671 1675 1679 1682 59 1686 1690 1694 1698 1702 1706 1710 1714 1718 1722 60 00 1726 1729 1733 1737 1741 1745 1749 1754 1758 1762 61 1766 1770 1774 1778 1782 1786 1790 1794 1798 1803 62 1807 1811 1815 1819 1823 1828 1832 1836 1840 1844 4 63 1849 1853 1857 1861 1866 1870 1874 1879 1883 1887 64 1892 1896 1900 1905 1909 1913 1918 1922 1927 1931 65 1936 1940 1945 1949 1953 1958 1962 1967 1972 1976 66 1981 1985 1990 1994 1999 2003 20081 2013 2017 2022 67 2027 2031 2036 2041 2045 2050 2055 2059 2064 2069 5 68 2074 2078 2083 2088 2093 2098 2102! 2107 2112 2117 69 2122 2127 2132 2137 2141 2146 2151 2156 2161 2166 70 002171 2176 2181 2186 2191 2196 2201 2206 2211 2217 71 2222 2227 2232 2237 2242 2247 2252 2258 2263 2268 72 2273, 2278 2284 2289 2294 2300 2305 2310 2315 2321 5 73 2326 2331 2337 2342 2348 2353 2358 2364 2369 2375 74 2380 2386 2391 2397 2402 2408 2413 2419 2424 2430 75 2435 2441 2447 2452 2458 2464 2469 2475 2481 2486 76 2492 2498 2503 2509 2515 2521 2527J 2532 2538 2544 77 2550; 2556 2562 2567 2573 2579 2585 2591 2597 2603 6 78 2609! 2615 2621 2627 2633 2639 2645 2651 2657 2663 79 2670 2676 2682 2688 2694 2700 2707 2713 2719 2725 80 00 2732 2738 2744 2750 2757 2763 2769 2776 2782 2789 81 2795 2801 2808 2814 2821 2827 2834: 2840 2847 2853 82 2860 2866 2873 2880 2886 2893 2900 2906 2913 2920 7 83 2926 2933i 2940 2947| 2953 2960 2967 2974 2981 2987 84 2994 3001 3008 3015J 3022 3029 3036 3043 3050 3057 85 3064 3071 3078 3085 3092 3099 3106 3113 3120 3128 86 3135! 3142 3149 3156, 3164 3171 3178 3186 3193 3200 87 3208 3215 3222 3230! 3237 3245 3252 3260| 3267 3275 8 88 3282 3290 3297 3305 3312 3320 3326 3335 3343 3350 89 3358 3366 3374 3381 3389 3397 3405 3413 3420 3428 ' 90 00 3436 3444 3452 3460 3468 3476 3484 3492 3500 3508 91 3516 3524 3532 3540 3548 3556 3565 3573 3581 3589 92 3597 3606 3614 3622 363! 3639 3647 3656 3664 3672 9 93 3681 3689 3698 3706 3715 3723 3732 3740 3749 3758 94 3766 3775 3783 3792 3801 3810 3818 3827 3836 3845 95 3854 3862 3871 3880 3889 3898 3907 3916 3925 3934 96 3943 3952 3961 3970 3979 3988 3997 4007 4016 4025 97 4034 4044 4053 4062 4071 4081 4090 4100 4109 4118 10 98 4128 4137 4147 4156 4166 4175 4185 4195 4204 4214 99 4223 4233 4243 4253 4262 4272 4282 4292 4302 4311 1 2 3 4 5 6 7 8 9 [3] TABLE I. Log Log(l+a?) X 1 2 3 4 5 6 7 8 9 D. 2-00 O'OO 4321 4331 4341 4351 4361 4371 4381 4391 4401 4411 10 01 4422 4432 4442 4452 4462 4472 4483 4493 4503 4514 10 02 4524 4534 4545 4555 4566 4576 4587 4597 4608 4618 10 '03 4629 4639 4650 4661 4671 4682 4693 4704 4714 4725 11 04 4736 4747 4758 4769 4780 4791 4802 4813 4824 4835 11 05 4846 4857 4868 4879 4890 4902 4913 4924 4935 4947 11 06 4956 4969 4981 4992 5004 5015 5027 5038 5050 5061 12 07 5073 5084 5096 5108 5119 5131 5143 5155 5167 5178 12 08 5190 5202 5214 5226 5238 5250 5262 5274 5286 5298 12 09 5310 5323 5335 5347 5359 5372 5384 5396 5409 5421 12 10 00 5433 5446 5458 5471 5483 5496 5508 5521 5534 5546 13 11 5559 5572 5585 5597 5610 5623 5636 5649 5662 5675 13 12 5688 5701 5714 5727 5740 5753 5766 5780 5793 5806 13 13 5819 5833 5846 5859 5873 5886 5900 5913 5927 5940 13 14 5954 5968 5981 5995 6009 6022 6036 6050 6064 6078 14 15 6092 6106 6120 6134 6148 6162 6176 6190 6204 6218 14 16 6233 6247 6261 6275 6290 6304 6319J 6333 6348 636^ 14 17 6377 6391 6406 6421 6435 6450 6465 1 6479 6494 6509 15 18 6524 6539 6554 6569 6584 6599 6614 6629 6644 6660 lo 19 6675 6690 6705 6721 6736 6752 6767: 6782 6798 6814 15 20 00 6829 6845 6860 6876 6892 6908 6923 6939 6955 6971 16 21 6987 7003 7019 7035 7051 7067 7083 7100 7116 7132 16 22 7148' 7165 7181 7197 7214 7230 7247i 7264 7280 7297 16 23 7313 7330 7347 7364 7381 7397 7414 7431 7448 7465 17 24 7482 7499 7517 7534 7551 7568 7586, 7603 7620 7638 17 25 7655 7673 7690 7708 7725 7743 7761: 7778 7796 7814 18 26 7832 7850 7868 7886 7904 7922 7940 7958 7976 7994 18 27 8013 8031 8049 8068 8086 8104 8123 8142 8160 8179 18 28 8197 8216 8235 8254 8273 8291 83 1 Ol 8329 8348 8367 19 29 8387 8406 8425 8444 8463 8483 8502 8522 8541 8560 19 30 00 8580 8600 8619 8639 8659 8678 8698 8718 8738 8758 20 31 8778 8798 8818 8838 8858 8878 8899 8919 8939 8960 20 32 8980 9001 9021 9042 9062 9083 9104 9125 9145 9166 21 33 9187 9208 9229 9250 9271 9292 9314 9335 9356 9378 21 34 9399 9420 9442 9463 9485 9507 9528 9550 9572 9594 22 35 9615 9637 9659 9681 9703 9726 9748 9770 9792 9814 22 36 9837 9859 9882 9904 9927 9949 9972 9995 0018 0040 23 37 01 0063 0086 0109 0132 0155 0179 0202 0225 0248 0272 23 38 0295 0318 0342 0366 0389 0413 0437 0460 0484 0508 24 39 0532 0556 0580 0604 0628 0652 0677 0701 0725 0750 24 40 01 0774 0799 0823 0848 0873 0897 0922 0947 0972 0997 25 41 1022 1047 1072 1097 1123 1148 1173 1199 1224 1250 25 42 1275 1301 1327 1353 1378 1404 1430 1456 1482 1508 26 43 1535 1561 1587 1614 1640 1666 1693 1720 1746 1773 26 44 1800 1827 1853 1880 1907 1934 1962 1989 2016 2043 27 45 2071 2098 2126 2153 2181 2209 2236 2264 2292 2320 28 46 2348 2376 2404 2432 2461 2489 2517 2546 2574 2603 28 47 2631 2660 2689 2718 2747 2776 2805 2834 2863 2892 29 48 2921 2951 2980 3010 3039 3069 3098 3128 3158 3188 30 49 3218 3248 3278 3308 3338 3369 3399 3429 3460 3490 30 1 2 3 4 5 6 7 8 9 TABLE I. Log Lo g(l +*) X 1 2 3 4 5 6 7 8 9 D. 2-50 O'Ol 3521 3552 3582 3613 3644 3675 3706 3737 3768 3800 31 51 3831 3862 3894 3925 3957 3989 4020 4052 4084 4116 32 52 4148 4180 4212 4244 4277 4309 4341 4374 4407 4439 32 53 4472 4505 4538 4571 4604 4637 4670 4703 4737 4770 33 54 4803 4837 4871 4904 4938 4972 5006 5040 5074 5108 34 55 5142 5177 5211 5245 5280 5315 5349 53,84 5419 5454 35 56 5489 5524 5559 5594 5630 5665 5700 5736 5772 5807 35 57 5843 5879 5915 5951 5987 6023 6059 6096 6132 6169 36 58 6205 6242 6279 6316 6352 6389 6427 6464 6501 6538 37 59 6576 6613 6651 6688 6726 6764 6802 6840 6878 6916 38 60 01 6954 6993 7031 7070 7108 7147 7186 7224 7263 7302 39 61 7341 7381 7420 7459 7499 7538 7578 7618 7657 7697 40 62 7737 7777 7817 7858 7898 7938 7979 8020 8060 8101 41 63 8142 8183 8224 8265 8306 8348 8389 8430 8472 8514 42 64 8556 8597 8639 8681 8724 8766 8808 8851 8893 8936 43 65 8978 9021 9064 9107 9150 9193 9237 9280 9324 9367 43 66 9411 9455 9498 9542 9586 9631 9675 9719 9764 9808 44 67 9853 9897 9942 9987 0032 o077 o!23 0168 o213 0259 45 68 02 0305 0350 0396 0442 0488 0534 0580 0627 0673 0720 46 69 0766 0813 0860 0907 0954 1001 1048 1096 1143 1191 47 70 02 1238 1286 1334 1382 1430 1478 1527 1575 1624 1672 48 71 1721 1770 1819 1868 1917 1966 2016 2065 2115 2164 49 72 2214 2264 2314 2364 2414 2465 2515 2566 2617 2667 50 73 2718 2769 2820 2872 2923 2975 3026 3078 3130 3182 52 74 3234 3286 3338 3390 3443 3495 3548 3601 3654 3707 53 75 3760 3813 3867 3920 3974 4028 4082 4136 4190 4244 54 76 4298 4353 4408 4462 4517 4572 4627 4682 4738 4793 55 77 4849 4904 4960 5016 5072 5128 5184 5241 5297 5354 56 78 5411 5468 5525 5582 5639 5696 5754 5812 5869 5927 57 79 5985 6043 6102 6160 6219 6277 6336 6395 6454 6513 59 80 '02 6572 6632 6691 6751 6811 6871 6931 6991 7051 7112 60 81 7172 7233 7294 7355 7416 7477 7539 7600 7662 7724 61 82 7785 7847 7910 7972 8034 8097 8160 8223 8286 8349 63 83 8412 8475 8539 8603 8666 8730 8794 8859 8923 8987 64 84 9052 9117 9182 9247 9312 9377 9443 9508 9574 9640 65 85 9706 9772 9839 9905 9972 o039 o!05 0172 0240 o307 67 86 03 0374 0442 0510 0578 0646 0714 0782 0851 0920 0988 68 87 1057 1126 1196 1265 1335 1404 1474 1544 1614 1684 70 88 1755 1825 1896 1967 2038 2109 2181 2252 2324 2396 71 89 2468 2540 2612 2684 2757 2830 2903 2976 3049 3122 73 90 03 3196 3269 3343 3417 3491 3566 3640 3715 3789 3864 74 91 3939 4015 4090 4166 4241 4317 4393 4470 4546 4622 76 92 4699 4776 4853 4930 5008 5085 5163 5241 5319 5397 78 93 5475 5554 5632 5711 5790 5870 5949 6028 6108 6188 79 94 6268 6348 6429 6509 6590 6671 6752 6833 6914 6996 81 95 7078 7160 7242 7324 7406 7489 7572 7655 7738 7821 83 96 7905 7988 8072 8156 8241 8325 8409 8494 8579 8664 85 97 8749 8835 8921 9006 9092 9179 9265 9351 9438 9525 87 98 9612 9699 9787 9874 9962 0050 0138 0227 0315 0404 88 99 04 0493 0582 0671 0761 0851 0941 1031 1121 1211 1302 90 1 2 3 4 5 6 7 8 9 [5] TABLE I. Log Log(l + z) Pro. Parts. X 1 2 3 4 5 6 7 8 9 9 10 11 12 fooo 0'04 1393 1402 1411 1420 1429 1438 1447 1456 1465 1475 00 001 1484 1493 1502 1511 1520 1529 1538 1548 1557 1566 01 002 1575 1584 1593 1602 1611 1621 1630 1639 1648 1657 02 003 1666 1075 1685 1694 1703 1712 1721 1730 1740 1749 03 004 1758 1767 1776 1785 1795 1804 1813 1822 1831 1840 04 005 1850 1859 1868 1877 1886 1896 1905 1914 1923 1932 05 o 1 006 1942 1951 I960 1969 1978 1988 1997 2006 2015 2025 on i 1 1 007 2034 2043 2052 2061 2071 K is. , 2089 2098 2108 2117 07 1 1 1 008 2126 2135 214.", \: } \ 2163 2172 2182 2191 2200 2209 08 1 1 1 009 2219 2228 22371 2246 2256 2205 2274 2284 2293 2302 09J 1 1 i 010 042311 2321 2330 2339 2348 2358 2367 2376 2386 2395 10 1 1 1 on 2404 2414 2423 2432 2442 2451 2460 2469 2479 2488 11 1 1 1 012 2497 2507 2516 2525 2535 2544 2553 2563 2572 258J 12 1 1 1 013 2591 2600 2609 2619 2628 2637 2647 2656 2666 2675 L3 1 1 2 014 2684 2694 2703 2712 2722 2731 2740 2750 2759 2769 14 1 1 2 2 015 2778 2787 2797 2806 2815 2825 2834 2844 2853 2862 15 1 2 2 2 016 2872 2881 2891 2900 2909 2919 2928 2938 2947 2957 if; 1 2 2 2 017 2966 2975 2985 2994 3004 3013 3022 3032 3041 3051 17 2 2 2 2 018 3060 3070 3079 3089 3098 3107 3117 3126 3136 3145 18 2 2 2 2 019 3155 3164 3174 3183 3193 3202 3212 3221 3230 3240 19 2 2 2 2 020 04 3249 3259 3268 3278 3287 3297 3306 3316 3325 3335 20 2 2 2 2 021 3344 3354 3363 3373 3382 3392 3401 3411 3420 3430 21 2 2 2 j 022 3439 3449 3458 3468 3477 3487 3497 3506 3516 3525 22 2 2 2 023 3535 3544 3564 3563 3573 3582 3592 3601 3611 3621 23 2 2 024 3630 3640 3649 3659 3668 3678 3688 3697 3707 3716 24 2 2 025 3726 3735 3745 3755 3764 3774 3783 3793 3803 3812 25 2 2 026 3822 3831 3841 3851 3860 3870 3879 3869 3899 3908 20 2 3 027 3918 3927 3937 3947 3956 3966 3976 3985 3995 4004 27 2 028 4014 4024 4033 4043 4053 4062 4072 4082 4091 4101 28 3 3 029 4111 4120 4130 4140 4149 4159 4169 4178 4188 4198 29 3 3 030 04 4207 4217 4227 4236 4246 4256 4265 4275 4285 4294 30 a 3 4 031 4304 4314 4324 4333 4343 4353 4362 4372 4382 4391 31 3 3 4 032 4401 4411 4421 4430 4440 4450 4460 4469 4479 4489 32 3 3 4 4 033 4498 4508 4518 4528 4537 4547 4557 4567 4576 4586 33 3 3 4 4 034 4596 4606 4615 4625 4635 4645 4655 4664 4674 4684 34 a 3 4 4 035 4694 4703 4713 4723 4733 4743 4752 4762 4772 4782 35 3 4 4 4 036 4792 4801 4811 4821 4831 4841 4850 4860 4870 4880 36 3 4 4 4 037 4890 4899 4909 4919 4929 4939 4949 4958 4968 4978 37 3 4 4 4 038 4988 4998 5008 5017 5027 5037 5047 5057 5067 5077 38 3 4 4 039 5086 5096 5106 5116 5126 5136 5146 5156 5165 5175 39 4 4 4 040 04 5185 5195 5205 5215 5225 5235 5244 5254 5264 5274 40 4 4 4 041 5284 5294 5304 5314 5324 5334 5344 5353 5:5(;:5 5373 41 4 4 5 042 5383 5393 5403 5413 5423 5433 5443 5453 5463 5473 42 4 4 5 043 5483 5492 5502 5512 5522 5532 5542 5552 5502 5572 43 4 4 5 044 5582 5592 5602 5612 5622 5632 5642 5652 5662 5672 44 4 4 5 045 5682 5092 5702 5712 5722 5732 5742 5752 5762 5772 45 4 4 5 046 5782 5792 5802 5812 5822 5832 5842 5852 5862 5872 46 4 5 5 047 5882 5892| 5902 5912 5922 5932 5912 5952 5962 5972 47 4 r 5 o 048 5982 5992 6002 6012 6022 0033 0043 6053 6063 6073 48 4 5 5 c 049 6083 6093 6103 6113 6123 6133 6143 6153 6163 6174 49 4 r 5 G 1 2 3 4 5 6 7 8 9 9 10 11 12 [6] TABLE L Log Log (1 + x) Pro. Parts. X 1 2 3 4 5 6 7 8 9 9101112 r-o5o 046184 6194 6204 6214 6224 t;234 6244 625-, 4556 051 6285 6295 6305 6315 6325 >345 6355 6366 6376 51 5 5 6 6 6386 6396 6406 6416 6426 '^447 6457 6467 6477 52 5 5 6 6 053 (3497 650- 6538 6548; 6558 6579 53 : c 6 6 054 6559 6599 60 6619 6630 (j(3-^0 6*35'. 6660 '3670 6680 54 5 5 6 6 055 6691 6701 6711 6721 6731 6742 6752 6762 6772 07-2 V; - C 6 - 056 6793 6803 681; 6834 6844 6-54 6864 6874 6555 ; 56 5067 057 196 6905 6915 692(3 6936 6946 6956 6907 0977 '57 3007 6997 7008 7015 1 _- 7049 7059 70691 7080 7090 58 5 6 7 059 7100 7110 7121 7131 7141 7151 7162 7172 7182 7193 59| a 6j 6| 7 060 04 7203 7213 7244 -_- :_ -_" ~--~ 7296 60 1 5J el 7J 7 061 7306 7316 7327 7337 7347 7358 7368 7378 7389 7399161 5 61 7i 7 062 7430 7440 7451 7461 7471 746' " - - . 063 7513 7523 7544 _.. - - - 064 7617 ' 27 7637 7648 76691 7679 7689 7700 065 na 7731 7741 7752 7773 7783 7793 7804 066 067 7929 7846 7940 7950 7960 7971 -Q^| ygQO ^',0 '^01% 068 8034 8044 8065 8086 8097 8107 8118 069 5139 8149 8160 a - 8 1 .:*: 82 i -212 -223 8233 09, 6788 070 8286 8296! 8307 8317; 8328 8338 70 6 7 8 8 071 834, -391 072 073 - ... , 1 .,;;- .. _; , ; .; ... V 505." 1 73 7789 074 8666 8< 7 *m 87081 8719 872^874^ 8751 - 7 r ~ ~ 7 - *"' 075 877: -:u 8-1 J -2' 8830 -,-' 8-"7 v<;^ 75 7859 076 ^v~v ^ v. , , v , i , , , ^ 8'.C- 7'' 7 8 8 I 1 (C7 - 77 7 - - T- 078 909:. 0145] 915Q 9ied 9177 079 9199 9209 9220 9231 9241 9252J 9263J 9274] 9284 080 04 9306 3 9349 936(J 937(J 9381 9392 . r - ~ ^ o ~ . 081 941: 9435 9446 9510i 8ll 7l 81 9 1( 52 9521 1 9532 9553 9564 9615 82 7 8 910 083 9029 9640 9650 9661 9683 9094 9704 9715 9720 5o 7 5 910 054 9737 9759 9769 9780 9834 84 8 8 910 08: 9845 9867 9899 991(J 9921 9932 ./.- 8:- 5 5 oi' 08C 067 9954 05 0063 0073 - - 0095 0106 0117 0128 0139 015? o052|8d 9 9 910 N 01 61187 8 9|1010 0172 0193 0204 0215 4o270|6d 8J 911011 - 0292 0335 0346 0357 0368 0379l8 ^ 9J1011 05 0390 0401 :~" J0489J9o| 8J 910J11 09 0500 0511 0522 0533 0555 0500 0577 058^ 059991^8 91011 09 0610 0621 0643 070992 5 91011 OQ 75 BO ' . 0-1993 8 91011 > 093094, 8 91011 09 09 ->2|o963|oi~ - 1018J102S 1 052 106a 1074 1085 1096 1 1141 hodd 9101011 Jll5ll9d 910|1112 09 IK- : 'I 1218| 1229J 1240| 1251 09 1274 12901307 13181 13291 13411 135211361 09 1390 1408 141C 148 1441J 1452J 1463 1 2 1 3 4 5 6 7 S i 9 1 1*10,1112 [7] TABLE I. Log Log (l + o;) Pro. Parts. X 1 2 3 4 5 6 7 8 9 11 12 13 14 Tioo 0-05 1497 1508 1519 1530 1542 1553 1564 1575 1586 1598 00 101 1609 1620 1631 1642 1654 1665 1676 1687 1699 1710 01 102 1721 1732 1743 1755 1766 1777 1788 1800 1811 1822 02 103 1833 1845 1856 1867 1878 1890 1901 1912 1923 1935 03 104 1946 1957 1969 1980 1991 2002 2014 2025 2036 2048 04 1 1 105 2059 2070 2081 2093 2104 2115 2127 2138 2149 2161 05 1 1 1 1 106 2172 2183 2195 2206 2217 2229 2240 2251 2263 2274 06 1 1 1 1 107 2285 2297 2308 2319 2331 2342 2353 2365 2376 2387 07 1 1 1 1 108 2399 2410 2422 2433 2444 2456 2467 2478 2490 2501 08 1 1 1 1 109 2513 2524 2535 2547 2558 2570 2581 2592 2604 2615 09 1 1 1 1 110 05 2627 2638 2649 2661 2672 2684 2695 2707 2718 2729 10 1 1 1 1 111 2741 2752 2764 2775 2787 2798 2809 2821 2832 2844 11 1 1 1 '2 112 2855 2867 2878 2890 2901 2913 2924 2936 2947 2959 12 1 1 2 2 113 2970 2982 2993 3004 3016 3027 3039 3050 3062 3073 13 1 2 2 2 114 3085 3096 3108 3119 3131 3143 3154 3166 3177 3189 14 2 2 2 2 115 3200 3212 3223 3235 3246 3258 3269 3281 3292 3304 15 2 2 2 2 116 3316 3327 3339 3350 3362 3373 3385 3396 3408 3420 ie 2 2 2 117 3431 3443 3454 3466 3478 3489 3501 3512 3524 3535 17 2 2 118 3547 3559 3570 3582 3593 3605 3617 3628 3640 3652 18 2 2 119 3663 3675 3686 3698 3710 3721 3733 3745 3756 3768 19 2 2 120 05 3780 3791 3803 3814 3826 3838 3849 3861 3873 3884 20 ^ 2 121 3896 3908 3919 3931 3943 3955 3966 3978 3990 4001 21 2 3 122 4013 4025 4036 4048 4060 4071 4083 4095 4107 4118 22 2 3 123 4130 4142 4153 4165 4177 4189 4200 4212 4224 4236 23 3 124 4247 4259 4271 4283 4294 4306 4318 4330 4341 4353 24 3 125 4365 4377 4388 4400 4412 4424 4436 4447 4459 4471 25 3 126 4483 4494 4506 4518 4530 4542 4553 4565 4577 4589 26 3 /j 127 4601 4612 4624 4636 4648 4660 4672 4683 4695 4707 27 3 4 4 128 4719 4731 4743 4754 4766 4778 4790 4802 4814 4826 28 3 4 4 129 4837 4849 4861 4873 4885 4897 4909 4921 4932 4944 29 < 3 4 4 130 05 4956 4968 4980 4992 5004 5016 5028 5039 5051 5063 30 3 4 4 4 131 5075 5087 5099 5111 5123 5135 5147 5159 5171 5182 31 3 4 4 4 132 5194 5206 5218 5230 5242 5254 5266 5278 5290 5302 32 4 4 4 4 133 5314 5326 5338 5350 5362 5374 5386 5398 5410 5422 33 4 4 4 134 5434 5446 5458 5470 5482 5494 5506 5517 5530 5542 34 4 4 4 135 5554 5566 5578 5590 5602 5614 5626 5638 5650 5662 35 4 4 Ir o 136 5674 5686 5698, 5710 5722 5734 5746 5758 5770 5782 36 4 4 5 137 5794 5806 5818 5830 5842 5854 5867 5879 5891 5903 37 4 4 r. 138 5915 5927 5939 5951 5963 5975 5987 5999 6012 6024 38 4 5 5 139 6036 6048 6060 6072 6084 6096 6108 6121 6133 6145 39 4 5 5 140 05 6157 6169 6181 6193 6205 6218 6230 6242 6254 6266 40 4 5 5 6 141 6278 6290 6303 6315 6327 6339 6351 6363 6376 6388 41 5 5 5 6 142 6400 6412 6424 6437 6449 6461 6473 6485 6498 6510 42 5 5 5 6 143 6522 6534 6546 6559 6571 6583 6595 6607 6620 6632 43 5 5 6 6 144 6644 6656 6669 6681 6693 6705 6717 6730 6742 6754 44 5 5 6 6 145 6766 6779 6791 6803 6816 6828 6840 6852 6865 6877 45 6 5 6 6 146 6889 6901 6914 6926 6938 6951 6963 6975 6987 7000 4(5 5 6 6 6 147 7012 7024 7037 7049 7061 7074 7086 7098 7111 7123 47 5 6 6 7 148 7135 7148 7160 7172 7185 7197 7209 7222 7234 7246 48 5 6 6 7 149 7259 7271 7283 7296 7308 7320 7333 7345 7357 7370 49 5 6 6 7 1 9 3 4 5 6 7 8 9 11 L2 13 14 [8] TABLE I. Log Log(l + a) Pro. Parts. X 1 2 3 4 5 6 7 8 9 11 12 13 14 1-150 0'05 7382 7395 7407 7419 7432 7444 7457 7469 7481 7494 50 5 6 6 7 151 7506 7519 7531 7543 7556 7568 7581 7593 7605 7618 31 6 6 7 7 152 7630 7643 7655 7668 7680 7692 7705 7717 7730 7742 52 6 6 *- t 7 153 7755 7767 7780 7792 7804 7817 7829 7842 7854 7867 53 6 6 7 7 154 7879 7892 7904 7917 7929 7942 7954 7967 7979 7992 54 6 6 7 8 155 8004 8017 8029 8042 8054 8067 8079 8092 8104 8117 55 6 7 7 8 156 8129 8142 8154 8167 8179 8192 8205 8217 8230 8242 56 6 H- / 7 g 157 8255 8267 8280 8292 8305 8318 8330 8343 8355 8368 57 6 / 7 8 158 8380 8393 8406 8418 8431 8443 8456 8469 8481 8494 58 6 7 8 8 159 8506 8519 8532 8544 8557 8569 8582 8595 8607 8620 59 6 7 8 8 160 05 8632 8645 8658 8670 8683 8696 8708 8721 8734 8746 60 7 7 8 8 161 8759 8772 8784 8797 8810 8822 8835 8848 8860 8873 61 7 7 8 9 162 8886 8898 8911 8924 8936 8949 8962 8974 8987 9000 62 7 7 8 9 163 9012 9025 9038 9051 9063 9076 9089 9101 9114 9127 63 7 8 8 9 164 9140 9152 9165 9178 9190 9203 9216 9229 9242 9254 64 7 8 8 9 165 9267 9280 9293 9305 9318 9331 9344 9356 9369 9382 65 7 8 8 9 166 9395 9408 9420 9433 9446 9459 9472 9484 9497 9510 66 7 8 9 9 167 9523 9536 9548 9561 9574 9587 9600 9612 9625 9638 67 7 8 9 9 168 9651 9664 9677 9689 9702 9715 9728 9741 9754 9767 68 7 8 9 10 169 9779 9792 9805 9818 9831 9844 9857 9870 9882 9895 69 8 8 9 1C 170 05 9908 9921 9934 9947 9960 9973 9986 9998 oOll 0024 70 8 8 9 10 171 06 0037 0050 0063 0076 0089 0102 0115 0128 0141 0153 71 8 9 9 10 172 01661 0179 0192 0205 0218 0231 0244 0257 0270 0283 72 8 9 9 10 173 0296 0309 0322 0335 0348 0361 0374 0387 0400 0413 73 8 9 9 1C 174 0426 0439 0452 0465 0478 0491 0504 0517 0530 0543 74 8 c 10 1C 175 0556 0569 0582 0595 0608 0621 0634 0647 0660 0673 75 8 c 10 11 176 0686 0699 0712 0725 0738 0751 0764 0777 0790 0803 76 8 9 10 11 177 0816 0830 0843 0856 0869 0882 0895 0908 0921 0934 77 8 c 10 11 178 0947 0960 0973 0987 1000 1013 1026 1039 1052 1065 78 9 9 1C) 11 179 1078 1091 1105 1118 1131 1144 1157 1170 1183 1197 79 9 c 10 11 180 06 1210 1223 1236 1249 1262 1275 1289 1302 1315 1328 8C 9 10 10 11 181 1341 1354 1368 1381 1394 1407 1420 1434 1447 1460 81 9 1C 11 11 182 1473 1486 1500 1513 1526 1539 1552 1566 1579 1592 82 9 10 11 11 183 1605 1618 1632 1645 1658 1671 1685 1698 1711 1724 83 9 1C 11 12 184 1738 1751 1764 1777 1791 1804 1817 1830 1844 1857 84 9 1C 11 1$ 185 1870 1884 1897 1910 1923 1937 1950 1963 1977 1990 85 9 1C 11 12 186 2003 2016 2030 2043 2056 2070 2083 2096 2110 2123 86 9 1C 11 12 187 2136 2150 2163 2176 2190 2203 2216 2230 2243 2256 87 10|lO 11 12 188 2270 2283 2297 2310 2323 2337 2350 2363 2377 2390 88 1011 11 12 189 2404 2417 2430 2444 2457 2470 2484 2497 2511 2524 89 10-11 12 12 190 06 2537 2551 2564 2578 2591 2605 2618 2631 2645 2658 90 10 11 12J1 191 2672 2685 2699 2712 2726 2739 2752 2766 2779 2793 91 10 11 12 1 192 2806 2820 2833 2847 2860 2874 2887 2901 2914 2928 92 10 11 1212 193 2941 2955 2968 2982 2995 3009 3022 3036 3049 3063 93ilO 11 12 lc 194 3076 3090 3103 3117 3130 3144 3157 3171 3184 3198 94 10 11 i2ji 195 3211 3225 3238 3252 3266 3279 3293 3306 3320 3333 95 10 11 12 1 196 3347 3361 3374 3388 3401 3415 3428 3442 3456 3469 9( 11 1212U 197 3483 3496 3510 3524 3537 3551 3564 3578 3592 3605 97 11 121314 198 3619 3633 3646 366( 3673 3687 3701 3714 3728 3742 98 11 121314 199 3755 3769 3783 3796 3810 3824 3837 3851 3865 3878 99 11 121314 1 2 3 4 5 6 7 8 9 11 12 13 14 F91 TABLE I. Log Log (l + x) Pro. Parts. X 1 2 3 4 5 6 7 8 9 13 14 15 16 17 1-20 0-06 3892 3906 3919 3933 3947 396 3974 3988 400 4015 00 ( 20 4029 4043 4056 4070 4084 409 4111 4125 4139 4152 01 202 4166 4180 4194 4207 4221 423 4249 4262 427 4290 02 o 203 4304 4317 4331 4345 4359 4373 4386 4400 4414 4428 03 ( ] 204 4441 4455 4469 4483 4497 451 4524 4538 4552 4566 04 1 1 1 1 ''. 205 4579 4593 4607 4621 4635 464 4662 4676 4690 4704 05 1 1 1 1 - 206 4718 4732 4745 4759 4773 478 4801 4815 4829 4842 06 1 1 1 1 ] 207 4856 4870 4884 4898 4912 492 4940 4954 496 4981 07 1 1 1 1 1 208 4995 5009 5023 5037 5051 506 5079 5093 510 5120 08 1 1 1 1 ] 209 5134 5148 5162 5176 5190 5204 5218 5232 524 5260 09 1 1 1 1 I 210 06 5274 5288 5302 5316 5330 5344 5358 5372 538 5399 10 1 1 1 2 o 211 5413 5427 5441 5455 5469 5483 5497 5511 552 5539 11 1 2 2 2 . 212 5553 5567 5581 5595 5609 5624 5638 5652 566 5680 12 2 2 2 2 2 213 5694 5708 5722 5736 5750 5764 5778 5792 580 5820 13 2 2 2 2 o 214 5834 5848 5862 5876 5890 5905 5919 5933 594" 5961 14 2 2 2 2 . 215 5975 5989 6003 6017 6031 6045 6060 6074 6088 6102 15 2 2 2 2 r t 216 6116 6130 6144 6158 6173 6187 6201 6215 6229 6243 16 2 2 2 3 t 217 6257 6272 6286 6300 6314 6328 6342 6357 6371 6385 17 2 2 3 3 I 218 6399 6413 6427 6442 6456 6470 6484 6498 6513 6527 18 2 3 3 c 219 6541 6555 6569 6584 6598 6612 6626 6640 6655 6669 19 2 3 a 3 220 06 6683 6697 6712 6726 6740 6754 6769 6783 679" 6811 20 j 3 c 221 6826 6840 6854 6868 6883 6897 6911 6926 6940 6954 21 ', 3 / 222 6968 6983 6997 7011 7026 7040 7054 7068 7083 7097 22 J 4 4 223 7111 7126 7140 7154 7169 7183 7197 7212 7226 7240 23 ; 4 ^ 224 7255 7269 7283 7298 7312 7327 7341 7355 7370 7384 24 3 i 4 4 225 7398 7413 7427 7442 7456 7470 7485 7499 7513 7528 25 *. / 4 4 226 7542 7557 7571 7585 7600 7614 7629 7643 7658 7672 26 i 4 4 4 4 227 7686 7701 7715 7730 7744 7759 7773 7788 7802 7816 27 4 4 L 4 5 228 7831 7845 7860 7874 7889 7903 7918 7932 7947 7961 28 i. 4 4 4 C c 229 7976 7990 8005 8019 8034 8048 8063 8077 8092 8106 29 L 4 ^ 5 5 230 06 8121 8135 8150 8164 8179 8193 8208 8222 8237 8251 30 / 4 5 5 p 231 8266 8281 8295 8310 8324 8339 8353 8368 8382 8397 31 4 4 5 5 5 232 8412 8426 8441 8455 8470 8484 8499 8514 8528 8543 32 4 4 r 6 5 233 8557 8572 8587 8601 8616 8631 8645 8660 8674 8689 33 / f: t. 5 5 6 234 8704 8718 8733 8748 8762 8777 8791 8806 8821 8835 34 4 5 5 5 6 235 8850 8865 8879 8894 8909 8923 8938 8953 8967 8982 35 5 F 5 6 6 236 8997 9012 9026 9041 9056 9070 9085 9100 9114 9129 36 5 g p. c 6 6 237 9144 9159 9173 9188 9203 9218 9232 9247 9262 9276 37 K 5 6 6 6 238 9291 9306 9321 9335 9350 9365 9380 9395 9409 9424 38 5 e tj 6 6 6 239 9439 9454 9468 9483 9498 9513 9528 9542 9557 9572 39 c O c 2 2 310 08 0689 0706 0723 0740 0757 0774 0791 0808 0825 0842 K 9 j 2 2 311 0859 0876 0893 0910 0927 0944 0961 0978 0995 1012 11 , c 2 2 312 1029 1046 1063 1080 1097 1114 1131 1148 1165 1182 12 i c 2 2 31-8 1199 1216 1233 1250 1268 1285 1302 1319 1336 1353 13 <. t 2 3 314 1370 1387 1404 1421 1438 1455 1473 1490 1507 1524 14 t <. 3 3 315 1541 1558 1575 1592 1610 1627 1644 1661 1678 1695 16 i) 3 3 316 1712 1730 1747 1764 1781 1798 1815 1832 1850 1867 K ; ; 3 3 317 1884 1901 1918 1936 1953 1970 1987 2004 2022 2039 17 t, ; 3 3 318 2056 20731 2090 2108 2125 2142 2159 2177 2194! 22 11 IS * ' 3 4 319 22281 2246 2263 1 2280 2297 2315 2332 2349 2366 23 s 1 19 * 3 4 I 1 i . 320 08 2401 2418 2436 2453 2470 2487 2505 2522 2539 2557 20 * 4 4 321 2574 2591 2609 2<;2< 2643 2661 2678 2695 2713 2730 2\ * > i 4 4 322 2747 2765 2782 2799 2817 2834 2851 2886 2904 22 4 4 4 323 2921 2938 29561 2973 2991 3008 3025 3043 3060 3078 2-.} t t 4 5 324 3095 3112 3130 3147 3165 3182 3199 3217 3234 3252 24 ^ ~ 4 5 325 3269 3287 3304 3322 3339 3357 3374 ! 3391 3409 3426 26 4 i 4 5 326 3444 3461 3479 3496 3514 3531 3549 3566 3584 3601 26 ^ 4 5 5 327 3619 3636 3654! 3671 3689 3706 3724 3742 3759 3777 27 ^ i 5 5 328 3794 3812 3829] 3847 3864 3882 3900 31)17 3935 3952 28 L. r 5 5 6 329 3970 3987 4005 4023 4040 4058 4075 4093 4111 4128 29 I ,- t G 6 330 08 4146 4163 4181 4199 4216 4234 4252 4269 4287 4304 30 t r 5 e 6 331 4322 4340 4357 4375 4393 4410 4428 4446 4463 4481 31 1 I r i 6 6 6 332 4499 4516 4534 4552 4569 4587 4605 4623 4640 4658 32 1 r (J G 333 4676 4693 4711 4729 4747 4764 4782 4800 4818 4835 33 K t ( 6 6 7 334 4853 4871 4889 4906 4924 4942 4960 4977 4995 5013 34 - ( 6 6 7 335 5031 5048 5066 5084 5102 5120 5137 5155 5173 5191 36 6 ( / 7 336 5209 5226 5244 5262 5280 5298 5316 5333 5351 5369 36 ( ( 6 7 / 337 5387 5405 5423 5441 5458 5476 5494 5512 5530 5548 37 ( 6 N / / 7 338 5566 5584 5601 5619 5637 5655 5673 5691 5709 5727 38 ( 6 7 7 8 339 5745 5763 5780 5798 5816 5834 5852 5870 5888 5906 39 ( i *w / 7 8 340 08 5924 5942 5960 5978 5996 6014 6032 6050 6068 6086 40 ( 7 8 8 341 6104 6122 6140 6158 6176 6194 6212 6230 6248 6266 41 t 7 8 8 342 6284 6302 6320 6338 6356 6374 6392 6410 6428 6446 42 7 8 8 8 343 6464 6482 6500 6518 6536 6554 6572 6590 6609 6627 43 7 8 8 9 344 6645 6663 6681 6699 6717 6735 6753 6771 6789 6808 44 7 8 8 9 345 6826 6844 6862 6880 6898 6916 6935 6953 6971 6989 45 7 8 8 9 9 346 7007 7025 7043 7062 7080 7098 7116 7134 7152 7171 40 7 8 8 !) 9 347 7189 7207 7225 7243 7262 7280 7298 7316 7334 7353 47 8 8 8 9 9 348 7371 7389 7407 7426 7444 7462 7480 7499 7517 7535 48 8 8 9 9 10 349 7553 7572 7590 7608 7G2G 7645 7663 7681 7699 7718 49 8 8 9 9 10 1 1 2 3 4 K o 6 7 8 9 16 17 18 19 20 [12] TABLE I. T ^ Log (1+a) Pro. Parts. Log X 1 2 3 4 5 6 7 8 9 16 17 18 1920 1-350 0-08 7736 7754 7773 7791 7809 7828 7846 7864 7882 7901 50 8 8 9 9 10 351 7919 7937 7956 7974 7992 8011 8029 8048 8066 8084 51 8 9 9 10 10 352 8103 8121 8139 8158 8176 8194 8213 8231 8250 8268 52 8 9 9 10 10 353 8286 8305 8323 8342 8360 8378 8397 8415 8434 8452 53 8 9 10 10 11 354 8470 8489 8507 8526 8544 8563 8581 8600 8618 8636 54 9 9 10 10 11 355 8655 8673 8692 8710 8729 8747 8766 8784 8803 8821 55 9 9 10 10 11 356 8840 8858 8877 8895 8914 8932 8951 8969 8988 9006 56 9 10 10 11 11 357 9025 9043 9062 9081 9099 9118 9136 9155 9173 9192 57 9 10 10 11 11 358 9210 9229 9248 9266 9285 9303 9322 9341 9359 9378 58 9 10 10 11 12 359 9396 9415 9434 9452 9471 9489 9508 9527 9545 9564 59 910 11 11 12 360 08 9583 9601 9620 9638 9657 9676 9694 9713 9732 9750 60 10 10 11 11 12 361 9769 9788 1 9806 9825 9844 9863 9881 9900 9919 9937 6110 10 11 12 12 362 9956 9975 ! 9993 0012 0031 0050 o068 0087 0106 0125 6210 11 11 12 12 363 09 0143 0162 0181 1 0200 0218 0237 0256 0275 0293 0312 63 10 11 11 12 13 364 0331 0350 0368 0387 0406 0425 0444 0462 0481 0500 64 10 11 12 12 13 365 366 0519 0707 0538 0726 0556 0575 0745 0764 0594 0783 0613 0801 0632 0820 0651 0839 0669 0858 0688 0877 65 66 10 11 11 11 12 12 1213 1313 367 0896 0915 0934 0953 0971 0990 1009 1028 1047 1066 67 11 11 121313 368 1085 1104 1123 1142 1161 1180 1198 1217, 1236 1255 68 11 12 121314 369 1274 1293; 1312 1331 1350 1369 1388 1407 1426 1445 69 11 12 1213)14 370 09 1464 1483 1502 1521 1540 1559 1578 1597| 1616 1635 7011 12 13 13 14 371 1654 1673 1692 1711 1730 1749 1768 1787; 1806 1825 71 11 12 1313 14 372 1844 1864J 1883 1902 1921 1940 1959 1978 1997 2016 72 12 12 1314 14 373 20351 2054! 2073 2093 2112 2131 2150 2169) 2188 2207 73 12 12 13 14 15 374 2226 2246 2265; 2284 2303 2322 2341 2360 2380 2399 74 12 13 13 14 15 375 2418 2437 2456 2475 2495 2514 2533 2552 2571 2591 75 12 13 14 14 15 376 2610! 2629 2648| 2667 2687 2706 2725 2744 2764 2783 76 12 13 14 14 15 377 2802 2821 2840, 2860 2879 2898 2918 2937 2956 2975 77 12 13 14 15 15 378 2995 3014 3033 3052 3072 3091 3110 3130 3149 3168 78 12 13 14 15 16 379 3188 3207 3226 3245 3265 3284 3303 3323 3342 3361 79 13 13 14 15 16 i I 380 093381 3400 3420 3439 3458 3478 3497 3516 3536 3555 8013 14 14 15 16 381 3574 3594 3613 3633 3652 3671 3691 3710 3730 3749 8113 14 15 15 16 382 3768 378,^ 3807 3827 3846 3866 3885 3904 3924 3943 8213. 14 15 16 16 383 3963 3982 4002 4021 4041 4060 4080 4099 4119 4138 8313 14 15 16 17 384 4158 4177 4197 4216 4236 4255 4275 4294 4314 4333 84 ! 13 14 15 16 17 385 386 4353i 4372 4548 4568 4392 4587 4411 4431 4607 4626 4450 4646 4470 4666 4489 4509 4685 4705 4529 4724 85,14 8614 14 15 15 15 16 16 17 17 387 4744 4764 4783 4803 4822 4842 4862 4881 4901 4920 87J14 15 16 17 17 388 4940 4960 4979 4999 5019 5038 5058 5078 5097 5117 8814 15 16 17 18 389 5137 5156 5176 5196 5215 5235 5255 5274 5294 5314 8914 15 16 17 18 390 09 5334 5353 5373 5393 5412 5432 5452 5472 5491 5511 9o|l4 15 16 17J18 391 5531 5551 5570 5590 5610 5630 5649 5669 5689 5709 9115 15 16 17)18 392 5728 5748 5768 5788 5808 5827 5847 5867 5887 5907 92' 15 16 17 17J18 393 5926 5946 5966 5986 6006 6026 6045 6065 6085 6105 93| 15 16 17 1819 394 6125 6145 6165 6184 6204 6224 6244 6264 6284 6304 9415 16 17 1819 395 6324 6343 6363 6383 6403 6423 6443 6463 6483 6503 9515 16 17 1819 396 6523 6543 6563 6583 6602 6622 6642 6662 6682 6702 9615 16 17 1819 397 6722 6742 6762 6782 6802 6822 6842 6862 6882 6902 9716 16 17 Its 10 398 6922 6942 6962 6982 7002 7022 7042 7062 7082 7102 98116 17 18 1920 399 7122 7142 7162 7182 7202 7222 7243 7263 7283 7303 99l 16 17 18 1920 1 2 3 4 5 6 7 8 9 16 17 18 1920 [13] TABLE I. Log Log(l- M Pro. Parts. X 1 2 3 4 5 6 7 8 9 20 21 22 23 24 T400 0-09 7323 7343 7363 7383 7403 7423 7443 7463 7484 7504 )() 401 7524 7544 7564 7584 7604 7624 7644 7665 7685 7705 )1 402 7725 7745 7765 7786 7806 7826 7846 7866 7886 7907 )2 403 7927 7947 7967 7987 8008 8028 8048 8068 8088 8109 )3 1 1 1 1 1 404 8129 8149 8169 8189 8210 8230 8250 8270 8291 8311 04 1 1 1 1 1 405 8331 8351 8372 8392 8412 8433 8453 8473 8493 8514 05 1 1 1 1 1 406 8534 8554 8575 8595 8615 8636 8656 8676 8697 8717 )6 1 1 1 1 1 407 8737 8758 8778 8798 8819 8839 8859 8880 8900 8920 )7 1 1 2 2 2 408 8941 8961 8981 9002 9022 9043 9063 9083 9104 9124 )8 2 2 2 2 2 409 9145 9165 9185 9206 9226 9247 9267 9288 9308 9329 )9 2 2 2 2 2 410 09 9349 9369 9390 9410 9431 9451 9472 9492 9513 9533 10 2 2 2 2 2 411 9554 9574 9595 9615 9636 9656 9677 9697 9718 9738 11 2 2 2 3 2 412 9759 9779 9800 9820 9841 9861 9882 9902 9923 9944 12 2 3 3 3 2 413 9964 9985 0005 0026 0046 0067 0088 0108 0129 0150 13 3 3 :3 3 ^ 414 100170 0190 0211 0232 0252 0273 0294 0314 0335 0355 14 3 3 3 3 3 415 0376 0397 0417 0438 0459 0479 0500 0521 0541 0562 15 3 3 3 3 4 416 0583 0603 0624 0645 0665 0686 0707 0727 0748 0769 10 3 3 4 4 4 417 0790 0810 0831 0852 0872 0893 0914 0935 0955 0976 17 3 4 4 4 4 418 0997 1018 1038 1059 1080 1101 1121 1142 1163 1184 18 4 4 4 4 4 419 1205 1225 1246 1267 1288 1308 1329 1350 1371 1392 18 4 4 4 4 5 420 10 1413 1433 1454 1475 1496 1517 1538 1558 1579 1600 20 4 4 4 5 5 421 1621 1642 1663 1684 1704 1725 1746 1767 1788 1809 21 4 4 r 5 5 422 1830 1851 1872 1893 1913 1934 1955 1976 1997 2018 22 4 5 6 5 5 423 2039 2060 2081 2102 2123 2144 2165 2186 2207 2228 22 5 5 5 5 6 424 2249 2270 2291 2312 2333 2354 2375 2396 2417 2438 24 5 5 r 6 6 425 2459 2480 2501 2522 2543 2564 2585 2606 2627 2648 25 5 5 r. 6 6 426 2669 2690 2711 2732 2753 2774 2795 2816 2837 2859 26 o 5 6 6 6 427 2880 2901 2922 2943 2964 2985 3006 3027 3049 3070 27 5 6 6 G 6 428 3091 3112 3133 3154 3175 3196 3218 3239 3260 3281 28 6 6 6 G 7 429 3302 3323 3345 3366 3387 3408 3429 3451 3472 3493 29 6 6 6 7 7 430 103514 3535 3557 3578 3599 3620 3641 3663 3684 3705 30 6 6 7 7 431 3726 3748 3769 3790 3811 3833 3854 3875 3897 3918 31 6 7 7 7 432 3939 3960 3982 4003 4024 4046 4067 4088 4109 4131 32 6 7 7 8 433 4152 4173 4195 4216 4237 4259 4280 4301 4323 4344 33 7 7 8 8 434 4366 4387 4408 4430 4451 4472 4494 4515 4537 4558 34 7 7 8 8 435 4579 4601 4622 4644 4665 4686 4708 4729 4751 4772 35 7 7 8 8 8 436 4794 4815 4836 4858 4879 4901 4922 4944 4965 4987 36 7 8 8 8 c 437 5008 5030 5051 5073 5094 5116 5137 5159 5180 5202 37 i 8 8 9 c 438 5223 5245 5266 5288 5309 5331 5352 5374 5395 5417 38 8 8 8 9 c 439 5438 5460 5482 5503 5525 5546 5568 5589 5611 5633 30 8 8 9 9 c 440 10 5654 5676 5697 5719 5741 5762 5784 5805 5827 5849 40 8 8 9 9 10 441 5870 5892 5914 5935 5957 5979 6000 6022 6044 6065 41 8 9 9 9 10 442 6087 6109 6130 6152 6174 6195 6217 6239 6260 6282 42 8 9 9 10 10 443 6304 6326 634" 6369 6391 6412 6434 6456 6478 6499 43 9 9 9 10 10 444 6521 6543 6565 6586 6608 663U 6652 6673 6695 6717 44 9 9 10 10 11 445 6739 6761 6782 6804 6826 6848 6870 6891 6913 6935 45 9 9 10 10 11 446 6957 6979 7001 7022 7044 706G 7088 7110 7132 7154 46 9 10 10 11 11 447 7175 719" 7219 7241 7263 7285 7307 7329 7350 7372 47 9 10 10 11 11 448 7394 7416 743P 746t 7482 7504 7526 7548 7570 7592 48 10 10 11 11 12 449 7614 7636 765" 767S 7701 7723 7745 7767 7789 7811 48 10 10 11 11 12 1 2 3 4 5 6 7 8 9 20 2122 23 24 TABLE I. Log- Log (1 + 3) Pro. Parts. cc 1 2 3 4 5 6 7 8 9 20 21 22 23 24 1-450 010 7833 7855 7877 7899 7921 7943 7965 7987 8009 8031 50 10 10 11 11 12 451 8053 8075 8097 8119 8141 8163 8186 8208 8230 8252 51 10 11 11 12 12 452 8274 8296 8318 8340 8362 8384 8406 8428 8450 8473 52 10 11 11 12 12 453 8495 8517 8539 8561 8583 8605 8627 8649 8672 8694 53 11 11 12 12 13 454 8716 8738 8760 8782 8805 8827 8849 8871 8893 8915 54 11 11 12 12 13 455 8938 8960 8982 9004 9026 9049 9071 9093 9115 9137 55 11 12 12 13 13 456 9160 9182 9204 9226 9249 9271 9293 9315 9338 9360 56 11 12 12 13 13 457 9382 9404 9427 0449 9471 9493 9516 9538 9560 9583 57 1112 13 13 14 458 9605 9627 9650 9672 9694 9716 9739 9761 9783 9806 581212 13 13 14 459 9828 9850 9873 9895 9918 9940 9962 9985 0007 0029 591212 13 14 14 460 11 0052 0074 0097 0119 0141 0164 0186 0209 0231 0253 6012 13 13 14 14 461 0276 0298 0321 0343 0366 0388 0410 0433 0455 0478 6112 13 13 14 15 462 0500 0523 0545 0568 0590 0613 0635 0658 0680 0703 6212 13 14 14 15 463 0725 0748 0770 0793 0815 0838 0860 0883 0905 0928 63 13 13 14 14 15 464 0950 0973 0995 1018 1041 1063 1086 1108 1131 1153 64 13 13 14 15 15 465 1176 1199 1221 1244 1266 1289 1312 1334 1357 1379 65 13 14 14 15 16 466 1402 1425 1447 1470 1493 1515 1538 1561 1583 1606 66 13 14 15 15 16 467 1629 1651 1674 1697 1719 1742 1765 1787 1810 1833 67 13 14 15 15 16 468 1855 1878 1901 1924 1946 1969 1992 2014 2037 2060 68 14 14 15 16 16 469 2083 2105 2128 2151 2174 2196 2219 2242 2265 2288 69 14 14 15 16 17 470 11 2310 2333 2356 2379 2402 2424 2447 2470 2493 2516 70 14 15 15 16 17 471 2538 2561 2584 2607 2630 2653 2675 2698 2721 2744 71 14 15 16 16 17 472 2767 2790 2813 2835 1 2858 2881 2904 2927 2950 2973 72 14 15 16 17 17 473 2996 3019 3042 3065 3087 3110 3133 3156 3179 3202 73 15 15 16 17 18 474 3225 3248 3271 3294 3317 3340 3363 3386 3409 3432 74 15 16 16 17 18 475 476 3455 3685 3478 3708 3501 3731 3524 3547 3754! 3777 3570 3800 3593 3823 3616 3846 3639 3869 3662 3892 75 76 15 15 16 16 17 17 17 17 18 18 477 3915 3938 3962 3985 4008 4031 4054 4077 4100 4123 77 15 16 17 18 18 478 4146 4169 4193 4216 4239 4262 4285 4308 4331 4354 78 16 16 17 18 19 479 4378 4401 4424 4447 4470 4493 4517 4540 4563 4586 79 16 17 17 18 19 480 114609 4633 4656 4679 4702 4725 4749 4772 4795 4818 80 16 17 18 18 19 481 4842 4865 4888 4911 4935 4958 4981 5004 5028 5051 81 16 17 18 19 19 482 5074 5097 5121 5144 5167 5191 5214 5237 5260 5284 82 16 17 18 19 20 483 5307 5330 5354 5377 5400 5424 5447 5470 5494 5517 83 17 17 18 19 20 484 5540 5564J 5587 5611 5634 5657 5681 5704 5727 5751 84 17 18 18 19 20 485 5774 5798 5821 5844! 5868 5891 5915 5938 5962 5985 85 17 18 19 20 20 486 6008 6032 6055 6079 6102 6126 6149 6173 6196 6220 86 17 18 19 20 21 487 6243 6267 6290 6314 6337 6361 6384 6408 6431 6455 87 17 18 19 20 21 488 489 6478 6714 6502 6737 6525 6761 6549 6572 6784 6808 6596 6831 6619 6855 6643 6879 6666 6902 6690 6926 88 89 18 18 18 19 19 20 20 2C 21 21 490 11 6949 6973: 6997 7020 7044 7068 7091 7115 7138 7162 9018ll9 2021 22 491 7186 7209 7233 7257 7280 7304 7328 7351 7375 7399 91 18H9 2021 22 492 7422 7446 7470 7494 7517 7541 7565 7588 7612 7636 92 1819 20'21 22 493 7660 7683 7707 7731 7755 7778 7802 7826 7850 7873 93 1920 2021 22 494 7897 7921 7945 7968 7992 8016 8040 8064 8087 8111 94 19 20 21 22 23 495 8135 8159 8183 8206 8230 8254 8278 8302 8326 8350 95 19 20 21 22 23 496 497 8373 8612 8397 8636 8421 8660 8445 8684 8469 8708 8493 8732 8517 8756 8540 8564 8780 8804 8588 8827 96 97 19 19 20 20 2122 21122 23 23 498 8851 8875 8899 8923 8947 8971 8995 9019 9043 9067 9820 21 2223 24 499 9091 9115 9139 9163 9187 9211 9235 9259 9283 9307 99 20 21 2223 24 1 2 3 4 5 6 7 8 9 20 21 2223 24 [15] TABLE I. Log Log (1 + aj) Pro. Parts. X 1 2 3 4 5 6 7 8 9 24 2 26 27 2 29 1-500 Oil 9331 9355 9379 9403 9427 9451 9475 9499 952C 9547 OC C C C C C 501 9572 9596 9620 9644 9668 9692 9716 9740 9764 9788 01 C C C C C 502 9812 9837 9861 9885 9909 9933 9957 9981 oOO 0030 02 C C 1 ] 1 503 120054 0078 0102 0126 0150 0175 0199 0223 0247 0271 03 1 1 1 1 1 504 0295 0320 0344 0368 0392 0416 0441 0465 048 0513 04 1 1 1 1 1 505 0538 0562 0586 0610 0635 0659 0682 0707 0735 0756 05 1 1 1 1 1 506 0780 0804 0829 0853 0877 0902 0926 0950 097 0999 06 1 2 a e 507 1023 1047 1072 1096 1120 1145 1169 119; 121 1242 07 2 2 2 2 2 508 1267 1291 1315 1340 1364 1388 1413 1437 1465 1486 08 2 2 2 2 2 509 1510 1535 1559 1584 1608 1632 1657 1681 1706 1730 09 2 2 2 c 3 510 12 1755 1779 1804 1828 1853 1877 1901 1926 1950 1975 ]( 2 2 f t. 3 511 1999 2024 2048 2073 2097 2122 2146 2171 91 o^ 2990 11 3 } o <> 512 2244 2269 2294 2318 2343 2367 2392 2416 AXtTt 2441 HuJHXAn 2465 12 3 2 g tl ^ 3 513 2490 2515 2539 2564 2588 2613 2638 2662 2687 2711 13 3 r 4] 4 4 i 514 2736 2761 2785 2810 2835 2859 2884 2908 2933 2958 14 3 4 4 4 4 4 515 2982 3007 3032 3056 3081 3106 3130 3155 3180 3205 15 4 4 4 4 4 < 516 3229 3254 3279 3303 3328 3353 33781 3402 3427 3452 16 4 4 4 4 4 5 517 3476 3501 3526 3551 3576 3600 3625! 3650 3675 3699 17 4 4 4 r. *j 5 5 518 3724 3749 3774 3799 3823 3848 3873 3898 3923 3947 18 4 4 5 TJ 5 K 519 3972 3997 4022 4047 4072 4097 4121 4146 4171 4196 19 5 5 r; G K . 5 6 520 124221 4246 4271 4295 4320 4345 4370 4395 4420 4445 20 i 5 5 f\ 6 6 521 4470 4495 4520 4545 4570 4594 4619 4644 4669 4694 21 5 5 5 6 6 6 522 4719 4744 4769 4794 4819 4844 4869 4894 4919 4944 22 K . 6 6 6 6 6 523 4969 4994 5019 5044 5069 5094 5119 5144 5169 5194 23 6 6 6 6 6 7 524 5219 5244 5269 5294 5320 5345 5370 5395 5420 5445 24 6 6 6 6 7 *" 525 5470 5495 5520 5545 5570 5596 5621 5646 5671 5696 25 6 6 6 7 7 7 526 5721 5746 5771 5797 5822 5847 5872 5897 5922 5948 26 6 6 7 7 7 8 527 5973 5998 6023 6048 6073 6099 6124 6149 6174 6200 27 (i 7 7 7 8 8 528 6225 6250 6275 6300 6326 6351 6376 6401 6427 6452 28 / 7 7 8 8 8 529 6477 6502 6528 6553 6578 6604 6629 6654 6679 6705 29 7 7 8 8 8 8 530 12 6730 6755 6781 6806 6831 6857 6882 6907 6933 6958 30 7 8 8 8 8 9 531 6983 7009 7034 7059 7085 7110 7136 7161 7186 7212 31 7 8 8 8 9 c 532 7237 7262 7288 7313 7339 7364 7390 7415 7440 7466 32 8 6 8 9 9 9 533 7491 7517 7542 7568 7593 7619 7644 7669 7695 7720 33 8 8 9 9 9 10 534 7746 7771 7797 7822 7848 7873 7899 7924 7950 7975 34 8 8 Q 9 10 10 535 8001 8026 8052 8078 8103 8129 8154 8180 8205 8231 35 8 9 C 9 10 10 536 8256 8282 8308 8333 8359 8384 8410 8436 8461 8487 36 9 c 9 10 10 10 537 8512 8538 8564 8589 8615 8640 8666 8692 8717 8743 37 9 9 10 10 10 11 538 8769 8794 8820 8846 8871 8897 8923 8948 8974 9000 38 9 10 10 1C) 11 11 539 9025 9051 9077 9103 9128 9154 9180 9206 9231 9257 39 9 10 10 11 11 11 540 12 9283 9308 9334 9360 9386 9412 9437 9463 9489 9515 40 10 10 10 11 11 12 541 9540 9566 9592 9618 9644 9669 9695 9721 9747 9773 41 10 10 11 11 11 12 542 9799 9824 9850 9876 9902 9928 9954 9980 0005 0031 42 10 10 11 11 12 12 543 13 0057 0083 0109 0135 0161 0187 0212 0238 0264 0290 4310 11 11 12 12 12 544 0316 0342 0368 0394 0420 0446 0472 0498 0524 0550 44 11 11 11 12 12 13 545 0576 0602 0628 0654 0679 0705 0731 0757 0783 0809 45 11 11 12 12 13 13 546 0835 0861 0888 0914 0940 0966 0992 1018 1044 1070 46 11 12 12 12 13 13 547 1096 1122 1148 1174 1200 1226 1252 1278 1304 1330 :7 11 12 12 13 13 14 548 1357 1383 1409 1435 1461 1487 1513 1539 1566 1592 48 12 12 12 13 13 14 549 1618 1644 1670 1696 1722 1749 1775 1801 1827 1853 49 12 12 13 13 14 14 1 2 3 4 5 6 7 8 9 24 25 26 27 28 29 [16] TABLE I. Log Log(l + a) Pro. Parts. X 1 2 3 4 5 6 7 8 9 24 25 26 27 28 29 1-550 0-13 1879 1906 1932 1958 1984 2010 2037 2063 2089 2115 50 12 12 13 13 14 14 551 2142 2168 2194 2220 2247 2273 2299 2325 2352 2378 51 12 13 13 14 14 15 552 2404 2430 2457 2483 2509 2536 2562 2588 2615 2641 52 12 13 14 14 15 15 553 2667 2693 2720 2746 2772 2799 2825 2852 2878 2904 53 13 13 14 14 15 15 554 2931 2957 2983 3010 3036 3063 3089 3115 3142 3168 54 13 14 14 15 15 16 555 3195 3221 3247 3274 3300 3327 3353 3380 3406 3432 55 13 14 14 15 15 16 556 3459 3485 3512 3538 3565 3591 3618 3644 3671 3697 56 13 H 15 15 16 16 557 3724| 3750 3777 3803 3830 3856 3883 3909 3936 3962 57 14 14 15 15 16 17 558 3989| 4015 4042 4069 4095 4122 4148 4175 4201 4228 58 14 14 15 16 16 17 559 4255 4281 4308 4334 4361 4388 4414 4441 4467 4494 59 14 15 15 16 17 17 560 13 4521 4547 4574 4601 4627 4654 4681 4707 4734 4761 60 14 15 16 16 17 17 561 4787 4814 4841 4867 4894 4921 4947 4974 5001 5028 61 15 15 16 16 17 18 562 5054 5081 5108 5135 5161 5188 5215 5242 5268 5295 62 15 16 16 17 17 18 563 5322 5349 5375 5402 5429 5456 5483 5509 5536 5563 63 15 16 16 17 18 18 564 5590 5617 5643 5670 5697 5724 5751 5778 5804 5831 64 15 16 17 17 18 19 565 5858 5885 5912 5939 5966 5993 6019 6046 6073 6100 65 16 16 17 18 18 19 566 6127 6154 6181 6208 6235 6262 6289 6316 6342 6369 66 16 16 17 18 18 19 567 6396 6423 6450 6477 6504 6531 6558 6585 6612 6639 67 16 17 17 18 19 19 568 6666 6693 6720 6747 6774 6801 6828 6855 6882 6909 68 16 17 18 18 19 20 569 6936 6963 6990 7017 7045 7072 7099 7126 7153 7180 69 17 17 18 19 19 20 570 13 7207 7234 7261 7288 7315 7342 7370 7397 7424 7451 70 17 18 18 1920 20 571 7478 7505 7532 7560 7587 7614 7641 7668 7695 7722 71 17 18 18 19 20 21 572 7750 7777 7804 7831 7858 7886 7913 7940 7967 7994 72 17 18 19 19 20 21 573 8022 8049 8076 8103 8131 8158 8185 8212 8240 8267 73 18 18 19 20 20 21 574 8294 8321 8349 8376 8403 8431 8458 8485 8512 8540 74 18 18 19 20 21 21 575 8567 8594 8622 8649 8676 8704 8731 8758 8786 8813 75 18 19 20 20 21 22 576 8841 8868 8895 8923 8950 8977 9005 9032 9060 9087 76 18 19 20 21 21 22 577 9114 9142 9169 9197 9224 9251 9279 9306 9334 9361 77 18 19 20 21 22 22 578 9389 9416 9444 9471 9499 9526 9553 9581 9608 9636 78 19 20 20 21 22 23 579 9663 9691 9718 9746 9773 9801 9829 9856 9884 9911 79 19 20 21 21 22 23 580 13 9939 9966 9994 0021 0049 0076 0104 0132 0159 0187 80 1920 21 22 22 23 581 140214 0242 0270 0297 0325 0352 0380 0408 0435 0463 81 1920 21 22 23 23 582 0491 0518 0546 0573 0601 0629 0656 0684 0712 0739 82 2020 21 22 23 24 583 0767 0795 0823 0850 0878 0906 0933 0961 0989 1016 83 2021 22 22 23 24 584 1044 1072 1100 1127 1155 1183 1211 1238 1266 1294 84 2021 22 23 24 24 585 1322 1350 1377 1405 1433 1461 1488 1516 1544 1572 85 2021 22 23 24 25 586 1600 1628 1655 1683 1711 1739 1767 1795 1822 1850 86 21 22 22 23 24 25 587 1878 1906 1934 1962 1990 2018 2046 2073 2101 2129 87 212223123 24 25 588 2157 2185 2213 2241 2269 2297 2325 2353 2381 2409 88 21 122 23124 25 26 589 2437 2464 2492 2520 2548 2576 2604 2632 2660 2688 89 2122 2324 25 26 590 142716 2744 2772 2800 2828 2856 2884 2913 2941 2969 90 22J22 23 24 25 26 591 2997 3025 3053 3081 3109 3137 3165 3193 3221 3249 91 2223 24 25 25 26 592 3277 3306 3334 3362 3390 3418 3446 3474 3502 3531 92 2223 24 2o 26 27 593 3559 3587 3615 3643 3671 3699 3728 3756 3784 3812 93 2223 24 25 26 27 594 3840 3869 3897 3925 3953 3981 4010 4038 4066 4094 94 23 24 24 25 26 27 595 4123 4151 4179 4207 4236 4264 4292 4320 4349 4377 95 23 24 25 26 27 28 596 4405 4434 4462 4490 4518 4547 4575 4603 4632 4660 96 23 2425 26 27 28 597 4688 4717 4745 4773 4802 4830 4858 4887 4915 4944 97 23 2425 26 27 28 598 4972 5000 5029 5057 5085 5114 5142 5171 5199 5228 98 24 2425 26 27 28 599 5256 5284 5313 5341 5370 5398 5427 5455 5484 5512 99 24 2526 27 28 29 26 1 2 3 4 5 6 7 8 9 24 25 27 28 29 TABLE I. Log Log (1+aj) Pro. Parts. X 1 2 3 4 5 6 7 8 9 28 20 30 31 32 33 f-600 014 5540 5569 5597 5626 5654 5683 5711 5740 5768 5797 0( 601 5825 5854 5882 5911 5940 5968 5997 6025 6054 6082 01 o o 602 6111 6139 6168 6197 6225 6254 6282 6311 6340 6368 02 1 1 1 1 1 1 603 6397 6425 6454 6483 6511 6540 6569 6597 6626 6655 03 1 1 1 1 1 1 604 6683 6712 6741 6769 6798 6827 6855 6884 6913 6941 04 1 1 1 1 1 1 605 6970 6999 7028 7056 7085 7114 7142 7171 7200 7229 06 1 1 1 2 2 2 606 7257 7286 7315 7344 7372 7401 7430 7459 7488 7516 0( 9 2 2 2 2 2 607 7545 7574 7603 7632 7660 7689 7718 7747 7776 7805 07 2 2 2 2 2 2 608 7833 7862 7891 7920 7949 7978 8007 8036 8064 8093 OS 2 2 2 2 3 3 609 8122 8151 8180 8209 8238 8267 s2'.)G 8325 8354 8383 09 a 3 3 3 3 3 610 148411 8440 8469 8498 8527 8556 8585 Sfil4 8643 8672 LI 3 3 3 <> > 3 3 611 8701 8730 8759 8788 8817 8846 8875 8904 8933 8962 1 1 3 3 3 3 4 4 612 8991 9020 9049 9078 9108 9137 9166 9195 9224 9253 12 3 3 4 4 4 4 613 9282 9311 9340 9369 9398 9427 9457 9486 9515 9544 L3 4 4 4 4 4 4 614 9573 9602 9631 9661 9690 9719 9748 9777 9806 9836 14 4 4 4 4 4 5 615 9865 9894 9923 9952 9981 oOll 0040 0069 0098 0128 15 4 4 5 5 5 5 616 150157 0186 0215 0244 0274 0303 0332 0361 0391 0420 1C 4 5 5 5 5 5 617 0449 0479 0508 0537 0566 0596 0625 0654 0684 0713 17 5 5 5 5 5 6 618 0742 0772 0801 0830 0860 0889 0918 0948 0977 loon is ff 6 6 c (i 6 619 1036 1065 1095 1124 1153 1183 1212 1242 1271 1300 10 5 6 8 <; 6 6 620 15 1330 1359 1389 1418 1448 1477 1506 1536 1565 1595 20 6 6 6 (, 6 7 621 1624 1654 1683 1713 1742 1772 1801 1831 1860 1890 21 8 6 6 7 7 7 622 1919 1949 1978 2008 2037 2067 2096 2126 2156 2185 1-1 (5 6 7 7 7 7 623 2215 2244 2274 2303 2333 2363 2392 2422 2451 2481 23 8 7 7 7 7 8 624 2511 2540 2570 2599 2629 2659 2688 2718 2748 2777 24 7 7 7 7 s 8 625 2807 2837 2866 2896 2926 2955 2985 3015 3044 3074 25 7 7 7 8 s 8 626 3104 3133 3163 3193 3223 3252 3282 3312 3342 3371 26 7 8 8 8 8 9 627 3401 3431 3461 3490 3520 3550 3580 3610 3639 3669 27 8 8 8 8 9 628 3699 3729 3759 3788 3818 3848 3878 3908 3938 3967 28 6 6 8 9 629 3997 4027 4057 4087 4117 4147 4176 4206 4236 4266 29 8 8 9 9 10 630 15 4296 4326 4356 4386 4416 4446 4475 4505 4535 4565 30 8 9 o 10 10 631 4595 4625 4655 4685 4715 4745 4775 4805 4835 4865 31 9 9 9 1( 1010 632 4895 4925 4955 4985 5015 5045 5075 5105 5135 5165 32 9 9 10 1( 10 11 633 5195 5225 5255 5285 5315 5346 5376 5406 5436 5466 33 9 10 10 1( 11 11 634 5496 5526 5556 5586 5616 5646 5677 5707 5737 5767 34 10 10 10 11 11 11 635 5797 5827 5857 5888 5918 5948 5978 6008 6038 6069 35 10 10 11 11 11 12 636 6099 6129 6159 6189 6220 6250 6280 6310 6341 6371 36 10 10 11 11 12 12 637 6401 6431 6461 6492 6522 6552 6583 6613 6643 6673 37 10 11 11 11 12 12 638 6704 6734 6764 6795 6825 6855 6885 6916 6946 6976 38 11 11 11 12 12 13 639 7007 7037 7067 7098 7128 7159 7189 7219 7250 7280 39 11 11 12 12 12 13 640 15 7310 7341 7371 7402 7432 7462 7493 7523 7554 7584 4( 11 12 12 12 13 13 641 7615 7645 7675 7706 7736 7767 7797 7828 7858 7889 41 II 12 12 13 13 14 642 7919 7950 7980 8011 8041 8072 8102 8133 8163 8194 42 L2 12 13 13 13 14 643 8224 8255 8285 8316 8346 8377 8408 8438 8469 8499 43 12 12 13 13 14 14 644 8530 8560 8591 8622 8652 8683 8713 8744 8775 8805 44 [-2 13 13 14 14 15 645 8836 8867 8897 8928 8958 8989 9020 9050 9081 9112 45 13 13 13 14 14 15 646 9142 9173 9204 9234 9265 9296 9327 9357 9388 9419 46 L3 13 14 14 15 15 647 9449 9480 9511 9542 9572 9603 9634 9665 9695 9726 47 L3 14 14 15 15 16 648 9757 9788 9819 9849 9880 9911 9942 9973 o003 o034 48 13 14 14 15 15 16 649 16 0065 0096 0127 0158 0188 0219 0250 0281 0312 0343 49 14 14 15 15 10 16 1 2 3 4 5 6 7 8 9 2s 20 30 31 12 33 [18] TABLE I. Log Log (l+x) Pro. Parts. X 1 2 3 4 5 6 7 8 9 28 29 30 31 32 33 T650 0'16 0374 0404 0435 0466 0497 0528 0559 0590 0621 0652 50 14 14 15 15 10 16 651 0683 0713 0744 0775 0806 0837 0868 0899 0930 0961 51 14 15 15 16 16 17 652 0992 1023 1054 1085 1116 1147 1178 1209 1240 1271 5215 15 16 16 17 17 653 1302 1333 1364 1395 1426 1457 1488 1519 1550 1581 5315 15 16 16 17 17 654 1613 1644 1675 1706 1737 1768 1799 1830 1861 1892 54 15 16 16 17 17 18 655 1924 1955 1986 2017 2048 2079 2110 2142 2173 2204 55 15 16 17 17 18 18 656 2235 2266 2297 2329 2360 2391 2422 2453 2485 2516 56 16 16 17 17 18 18 657 2547 2578 2609 2641 2672 2703 2734 2766 2797 2828 57 16 17 17 18 18 19 658 2859 2891 2922 2953 2985 3016 3047 3078 3110 3141 58 16 17 17 18 19 19 659 3172 3204 3235 3266 3298 3329 3360 3392 3423 3454 59 17 17 18 18 19 19 660 16 3486 3517 3549 3580 3611 3643 3674 3706 3737 3768 GO 17 17 18 19 19 20 661 3800 3831 3863 3894 3926 3957 3988 4020 4051 4083 01 17 18 18 19 20 20 662 4114 4146 4177 4209 4240 4272 4303 4335 4366 4398 G2 17 18 19 1920 20 663 4429 4461 4492 4524 4555 4587 4618 4650 4681 4713 63 18 18 19 2020 21 664 4745 4776 4808 4839 4871 4903 4934 4966 4997 5029 04 18 19 19 2020 21 665 5061 5092 5124 5155 5187 5219 5250 5282 5314 5345 65 18 19 19 20 21 21 666 5377 5409 5440 5472 5504 5535 5567 5599 5630 5662 60 18 19 20 20 21 22 667 5694 5726 5757 5789 5821 5853 5884 5916 5948 5980 G7 19 19 20 21 21 22 668 6011 6043 6075 6107 6138 6170 6202 6234 6266 6297 68 19 20 20 21 22 22 669 6329 6361 6393 6425 6457 6488 6520 6552 6584 6616 69 19 20 21 21 22 23 670 16 6648 6680 6711 6743 6775 6807 6839 6871 6903 6935 70 20 20 21 22 22 23 671 6967 6999 7030 7062 7094 7126 7158 7190 7222 7254 71 20 21 21 22 23 23 672 7286 7318 7350 7382 7414 7446 7478 7510 7542 7574 72 20 21 22 22 23 24 673 7606 7638 7670 7702 7734 7766 7798 7830 7862 7894 73 20 21 22 23 23 24 674 7926 7958 7991 8023 8055 8087 8119 8151 8183 8215 74 21 21 22 23 24 24 675 8247 8279 8312 8344 8376 8408 8440 8472 8504 8537 75 21 22 23 23 24 25 676 8569 8601 8633 8665 8697 8730 8762 8794 8826 8858 76 21 22 23 24 24 25 677 8891 8923 8955 8987 9020 9052 9084 9116 9149 9181 77 22 22 23 24 25 25 678 9213 9245 9278 9310 9342 9375 9407 9439 9471 9504 78 22 23 23 24 25 26 679 9536 9568 9601 9633 9665 9698 9730 9762 9795 9827 79 22 23 24 24 25 26 680 16 9860 9892 9924 9957 9989 0021 0054 0086 0119 0151 80 2223 24 25 20 26 681 170183 0216 0248 0281 0313 0346 0378 0411 0443 0475 81 23 23 24 25 26 27 682 0508 0540 0573 0605 0638 0670 0703 0735 0768 0800 82 23 24 25 25 26 27 683 0833 0865 0898 0930 0963 0996 1028 1061 1093 1126 83 23 24 25 26 27 27 684 1158 1191 1224 1256 1289 1321 1354 1386 1419 1452 84 24 24 25 26 27 28 685 1484 1517 1550 1582 1615 1648 1680 1713 1745 1778 85 24 25 25 26 27 28 686 1811 1843 1876 1909 1942 1974 2007 2040 2072 2105 86 24 25 20 27 28 28 687 2138 2171 2203 2236 2269 2301 2334 2367 2400 2433 87 24 25 20 27 28 29 688 2465 2498 2531 2564 2596 2629 2662 2695 2728 2760 88 25 2G 26 27 28 29 689 2793 2826 2859 2892 2925 2957 2990 3023 3056 3089 89 25 26 27 28 2829 690 173122 3155 3188 3220 3253 3286 3319 3352 3385 3418 90 25 26 2728 29 30 691 3451 3484 3517 3550 3583 3616 3648 3681 3714 3747 91 25 20 2728 29 30 692 3780 3813 3846 3879 3912 3945 3978 4011 4044 4077 92 26 27 2829 29 30 693 4110 4143 4176 4209 4243 4276 4309 4342 4375 4408 93 26 27 2829 30 31 694 4441 4474 4507 4540 4573 4606 4639 4673 4706 4739 94 26 27 28 29 30 31 695 4772 4805 4838 4871 4905 4938 4971 5004 5037 5070 95 27 28 29 29 30 31 696 5104 5137 5170 5203 5236 5269 5303 5336 5369 5402 96 27 28 2930 31 32 697 5436 5469 5502 5535 5569 5602 5635 5668 5702 5735 97 27 28 2930 31 32 698 5768 5801 5835 5868 5901 5935 5968 6001 6035 6068 98 27 28 2930 31 32 699 6101 6135 6168 6201 6235 6268 6301 6335 6368 6401 99 28 29 3031 32 33 1 2 3 4 5 6 7 8 9 28 29 30|31 32 33 TABLE I. Log Log(l + a) Pro. Parts. X 1 2 3 4 5 6 7 8 9 34 35 36 37 38 39 r-700 017 6435 6468 6502 6535 6568 6602 6635 6669 6702 6736 )() 701 6769 6802 6836 6869 6903 6936 6970 7003 7037 7070 )1 702 7104 7137 7171 7204 7238 7271 7305 7338 7372 7405 02 1 1 1 1 1 1 703 7439 7472 7506 7539 7573 7607 7640 7674 7707 7741 03 1 1 1 1 1 1 704 7774 7808 7842 7875 7909 7942 7976 8010 8043 8077 04 1 1 1 1 2 2 705 8111 8144 8178 8212 8245 8279 8313 8346 8380 8414 05 2 2 2 2 2 2 706 8447 8481 8515 8548 8582 8616 8650 8683 8717 8751 06 2 2 2 2 2 2 707 8784 8818 8852 8886 8919 8953 8987 9021 9055 9088 07 2 2 3 3 3 3 708 9122 9156 9190 9224 9257 9291 9325 9359 9393 9427 08 o o 3 3 3 3 3 709 9460 9494 9528 9562 9596 9630 9664 9697 9731 9765 09 g 3 3 3 8 4 710 17 9799 9833 9867 9901 9935 9969 0003 0037 0071 0104 10 3 3 4 4 4 4 711 18 0138 0172 0206 0240 0274 0308 0342 0376 0410 0444 11 4 4 4 4 4 4 712 0478 0512 0546 0580 0614 0648 0682 0716 0750 0784 12 4 4 4 4 5 5 713 0818 0853 0887 0921 0955 0989 1023 1057 1091 1125 13 4 5 5 5 5 5 714 1159 1193 1227 1262 1296 1330 1364 1398 1432 1466 14 r> 5 5 5 5 5 715 1501 1535 1569 1603 1637 1671 1706 1740 1774 1808 15 r. o 5 5 6 e 6 716 1842 1877 1911 1945 1979 2014 2048 2082 2116 2151 If. r-j 6 6 6 6 6 717 2185 2219 2253 2288 2322 2356 2390 2425 2459 2493 17 6 6 6 6 7 718 2528 2562 2596 2631 2665 2699 2734 2768 2802 2837 18 () 6 6 7 7 7 719 2871 2905 2940 2974 3009 3043 3077 3112 3146 3181 19 6 7 7 7 7 7 720 183215 3249 3284 3318 3353 3387 3422 3456 3491 3525 20 7 7 7 7 8 8 721 3559 3594 3628 3663 3697 3732 3766 3801 3835 3870 21 7 7 8 8 8 8 722 3904 3939 3973 4008 4043 4077 4112 4146 4181 4215 22 7 8 8 8 8 9 723 4250 4284 4319 4354 4388 4423 4457 4492 4527 4561 23 8 8 8 9 g 9 724 4596 4631 4665 4700 4734 4769 4804 4838 4873 4908 24 8 8 9 9 <: 9 725 4942 4977 5012 5046 5081 5116 5151 5185 5220 5255 25 8 9 9 9 () 10 726 5289 5324 5359 5394 5428 5463 5498 5533 5567 5602 26 9 9 9 10 10 10 727 5637 5672 5707 5741 5776 5811 5846 5881 5915 5950 27 9 9 10 10 10 11 728 5985 6020 6055 6090 6124 6159 6194 6229 6264 6299 28 10 10 10 10 11 11 729 6334 6369 6404 6438 6473 6508 6543 6578 6613 6648 29 10 10 10 11 11 11 730 18 6683 6718 6753 6788 6823 6858 6893 6928 6963 6998 30 10 11 11 11 11 12 731 7033 7068 7103 7138 7173 7208 7243 7278 7313 7348 31 11 11 11 11 12 12 732 7383 7418 7453 7488 7523 7558 7593 7628 7663 7698 32 11 11 12 12 12 12 733 7733 7768 7804 7839 7874 7909 7944 7979 8014 8049 33 11 12 12 12 13 13 734 8085 8120 8155 8190 8225 8260 8296 8331 8366 8401 34 12 12 12 13 13 13 735 8436 8472 8507 8542 8577 8612 8648 8683 8718 8753 35 12 12 13 13 13 14 736 8789 8824 8859 8894 8930 8965 9000 9036 9071 9106 36 1 Q 1? 1? IS "M 14 737 9141 9177 9212 9247 9283 9318 9353 9389 9424 9459 37 13 13 13 14 14 14 738 9495 9530 9566 9601 9636 9672 9707 9742 9778 9813 38 13 13 14 14 14 15 739 9849 9884 9919 9955 9990 0026 0061 0097 0132 0168 a 13 14 14 14 15 15 740 190203 0239 0274 0309 0345 0380 0416 0451 0487 0522 40 14 14 14 15 15 16 741 0558 0593 0629 0665 0700 0736 0771 0807 0842 0878 41 14 14 15 15 16 16 742 0913 0949 0985 1020 1056 1091 1127 1163 1198 1234 42 14 15 15 16 16 16 743 1269 1305 1341 1376 1412 1448 1483 1519 1555 1590 43 15 15 15 16 16 17 744 1626 1662 1697 1733 1769 1804 1840 1876 1911 1947 44 15 15 16 16 17 17 745 1983 2019 2054 2090 2126 2162 2197 2233 2269 2305 45 15 16 16 17 17 18 746 2340 2376 2412 2448 2484 2519 2555 2591 2627 2663 4f 16 16 17 17 17 18 747 2699 2734 2770 2806 2842 2878 2914 2949 2985 3021 47 16 16 17 17 18 18 748 3057 3093 3129 3165 3201 3237 3273 3308 3344 3380 48 16 17 17 18 18 19 749 3416 3452 3488 3524 3560 3596 3632 3668 3704 3740 49 17 17 18 18 19 19 1 2 3 4 5 6 7 8 9 34 35 36 37 38 39 [20] TABLE I. Log Log(l+x) Pro. Parts. X I 2 3 4 5 6 7 8 9 34 35 36 37 38 39 1-750 0-19 3776 3812 3848 3884 3920 3956 3992 4028 4064 4100 50 17 17 18 18 19 19 751 4136 4172 4208 4244 4280 4316 4352 4389 4425 4461 51 17 18 18 19 19 20 752 4497 4533 4569 4605 4641 4677 4714 4750 4786 4822 52 18 18 19 19 20 20 753 4858 4894 4930 4967 5003 5039 5075 5111 5148 5184 53 18 19 19 20 20 21 754 5220 5256 5292 5329 5365 5401 5437 5473 5510 5546 54 18 19 19 20 21 21 '755 5582 5618 5655 5691 5727 5764 5800 5836 5872 5909 55 19 19 20 20 21 21 756 5945 5981 6018 6054 6090 6127 6163 6199 6236 6272 56 19 20 20 21 21 22 757 6308 6345 6381 6418 6454 6490 6527 6563 6600 6636 57 19 20 21 21 22 22 758 6672 6709 6745 6782 6818 6855 6891 6927 6964 7000 58 20 20 21 21 22 23 759 7037 7073 7110 7146 7183 7219 7256 7292 7329 7365 59 20 21 21 22 22 23 760 19 7402 7438 7475 7511 7548 7585 7621 7658 7694 7731 60 20 21 22 22 2323 761 7767 7804 7841 7877 7914 7950 7987 8024 8060 8097 61 21 21 22 23 2324 762 8133 8170 8207 8243 8280 8317 8353 8390 8427 8463 6221 22 22 23 24 24 763 8500 8537 8573 8610 8647 8684 8720 8757 8794 8830 63'21 2223 23 24 25 764 8867 8904 8941 8977 9014 9051 9088 9124 9161 9198 64 22 22 23 24 24 25 765 9235 9272 9308 9345 9382 9419 9456 9492 9529 9566 65 22 23 23 24 25 25 766 9603 9640 9677 9714 9750 9787 9824 9861 9898 9935 66,22 23 24 24 25 26 767 9972 0009 o046 0082 0119 0156 0193 0230 0267 0304 6723 23 24 25 25 26 768 20 0341 0378 0415 0452 0489 0526 0563 0600 0637 0674 6823 24 24 25 26 27 769 0711 0748 0785 0822 0859 0896 0933 0970 1007 1044 6923 24 25 26 26 27 770 20 1081 1118 1155 1192 1229 1267 1304 1341 1378 1415 70 24 25 25 26 27 27 771 1452 1489 1526 1563 1601 1638 1675 1712 1749 1786 71 24 25 26 26 27 28 772 1823 1861 1898 1935 1972 2009 2047 2084 2121 2158 72 24 25 26 27 27 28 773 2195 2233 2270 2307 2344 2382 2419 2456 2493 2531 73 25 26 26 27 28 28 774 2568 2605 2642 2680 2717 2754 2792 2829 2866 2904 74 25 26 27 27 28 29 775 2941 2978 3016 3053 3090 3128 3165 3202 3240 3277 75 26 26 27 28 29 29 776 3315 3352 3389 3427 3464 3501 3539 3576 3614 3651 76 26 27 27 28 29 30 777 3689 3726 3764 3801 3838 3876 3913 3951 3988 4026 77 26 27 28 28 29 30 778 4063 4101 4138 4176 4213 4251 4288 4326 4363 4401 78 27 27 28 29 30 30 779 4438 4476 4514 4551 4589 4626 4664 4701 4739 4777 79 27 28 28 29 30 31 780 20 4814 4852 4889 4927 4965 5002 5040 5078 5115 5153 80 27 2829 30 30 31 781 5190 5228 5266 5303 5341 5379 5416 5454 5492 5530 8128 2829 30 31 32 782 5567 5605 5643 5680 5718 5756 5794 5831 5869 5907 82 ; 28 29 30 30 31 32 783 5945 5982 6020 6058 6096 6133 6171 6209 6247 6285 8328 29 30 31 32 32 784 6323 6360 6398 6436 6474 6512 6549 6587 6625 6663 84 29 29 30 31 32 33 -785 6701 6739 6777 6815 6852 6890 6928 6966 7004 7042 85 29 30 31 31 32 33 786 7080 7118 7156 7194 7232 7270 7308 7346 7383 7421 86 29 30 31 32 33 34 787 7459 7497 7535 7573 7611 7649 7687 7725 7763 7801 87 30 30 31 32 33 34 788 7839 7878 7916 7954 7992 8030 8068 8106 8144 8182 88 30 31 32 33 33 34 789 8220 8258 8296 8334 8372 8411 8449 8487 8525 8563 89 30 31 32 33 34 35 790 20 8601 8639 8678 8716 8754 8792 8830 8868 8907 8945 90 31 31 32 33 34 35 791 8983 9021 9059 9098 9136 9174 9212 9250 9289 9327 91 31 32 33 34 35 35 792 9365 9403 9442 9480 9518 9556 9595! 9633 9671 9710 92 31 32 33 34 35 36 793 9748 9786 9825 9863 9901 9940 9978 0016 0055 0093 93 32 33 33 34 35 36 794 21 0131 0170 0208 0246 0285 0323 0361 0400 0438 0477 94 32 33 34 35 36 37 795 0515 0554 0592 0630 0669 0707 0746 0784 0823 0861 95 32 33 34 35 36 37 796 0900 0938 0976 1015 1053 1092 1130 1169 1207 1246 96 33 34 35 36 36 37 797 1284 1323 1362 1400 1439 1477 1516 1554 1593 1631 97 33 34 35 36 37 38 798 1670 1709 1747 1786 1824 1863 1902 1940 1979 2017 98 33 34 35 36 37 38 799 2056 2095 2133 2172 2211 2249 2288 2327 2365 2404 99 34 35 36 37 38 39 1 2 3 4 5 6 7 8 9 34 35 36 37 38 39 F211 TABLE I. Log Log (l+x) Pro. Parts. X 1 2 3 4 5 6 7 8 9 39 40 41 42 43 44 T-800 0-21 2443 2481 2520 2559 2597 2636 2675 2714 2752 2791 00 Q Q 801 2830 2868 2907 2946 2985 3024 3062 3101 3140 3179 01 802 3217 3256 3295 3334 3373 3411 3450 3489 3528 3567 02 1 1 1 1 1 1 803 3606 3645 3683 3722 3761 3800 3839 3878 3917 3956 03 1 1 1 1 1 1 804 3994 4033 4072 4111 4150 4189 4228 4267 4306 4345 04 2 2 2 2 2 2 805 4384 4423 4462 4501 4540 4579 4618 4657 4696 4735 06 2 2 2 2 2 2 806 4774 4813 4852 4891 4930 4969 5008 5047 5086 5125 06 2 2 2 3 3 3 807 5164 5203 5242 5281 5320 5359 5399 5438 5477 5516 07 3 3 3 3 3 3 808 5555 5594 5633 5672 5712 5751 5790 5829 5868 5907 08 3 3 3 3 3 4 809 5947 5986 6025 6064 6103 6142 6182 6221 6260 6299 09 4 4 4 4 4 4 810 21 6339 6378 6417 6456 6496 6535 6574 6613 6653 6692 10 4 4 4 4 4 4 811 6731 6770 6810 6849 6888 6928 6967 7006 7046 7085 11 4 4 5 5 5 5 812 7124 7164 7203 7242 7282 7321 7361 7400 7439 7479 12 5 5 5 5 5 5 813 7518 7557 7597 7636 7676 7715 7755 7794 7833 7873 13 5 5 5 5 6 6 814 7912 7952 7991 8031 8070 8110 8149 8189 8228 8268 14 5 6 6 6 6 6 815 8307 8347 8386 8426 8465 8505 8544 8584 8623 8663 18 6 a 6 6 6 7 816 8703 8742 8782 8821 8861 8900 8940 8980 9019 9059 16 6 Q 7 7 7 7 817 9098 9138 9178 9217 9257 9297 9336 9376 9416 9455 17 7 7 7 7 7 7 818 9495 9535 9574 9614 9654 9693 9733 9773 9812 9852 18 7 7 7 8 8 8 819 9892 9932 9971 oOll 0051 0091 0130 0170 0210 0250 19 7 8 8 8 8 8 820 22 0289 0329 0369 0409 0449 0488 0528 0568 0608 0648 20 8 8 8 8 9 9 821 0688 0727 0767 0807 0847 0887 0927 0967 1006 1046 21 8 8 9 9 9 9 822 1086 1126 1166 1206 1246 1286 1326 1366 1406 1446 2-2 9 9 9 9 9 10 823 1485 1525 1565 1605 1645 1685 1725 1765 1805 1845 2-3 9 9 9 10 10 10 824 1885 1925 1965 2005 2045 2085 2125 2165 2205 2246 24 9 10 10 10 10 11 825 2286 2326 2366 2406 2446 2486 2526 2566 2606 2646 25 10 10 10 10 11 11 826 2686 2727 2767 2807 2847 2887 2927 2967 3008 3048 2(5 10 10 11 11 11 11 827 3088 3128 3168 3208 3249 3289 3329 3369 3409 3450 27 11 11 11 11 12 12 828 3490 3530 3570 3611 3651 3691 3731 3772 3812 3852 28 11 11 11 12 12 12 829 3892 3933 3973 4013 4054 4094 4134 4175 4215 4255 2!) 11 12 12 12 12 13 830 22 4296 4336 4376 4417 4457 4497 4538 4578 4618 4659 30 12 12 12 13 13 13 831 4699 4740 4780 4820 4861 4901 4942 4982 5022 5063 31 12 12 13 13 13 14 832 5103 5144 5184 5225 5265 5306 5346 5387 5427 5468 32 12 13 13 13 14 14 833 5508 5549 5589 5630 5670 5711 5751 5792 5832 5873 33 13 13 14 14 14 15 834 5913 5954 5995 6035 6076 6116 6157 6197 6238 6279 34 13 14 14 14 15 15 835 6319 6360 6401 6441 6482 6522 6563 6604 6644 668*5 35 14 14 14 15 15 15 836 6726 6766 6807 6848 6888 6929 6970 7011 7051 7092 30 14 14 15 15 15 16 837 7133 7173 7214 7255 7296 7336 7377 7418 7459 7499 37 14 15 15 16 16 16 838 7540 7581 7622 7663 7703 7744 7785 7826 7867 7907 38 15 15 16 16 16 17 839 7948 7989 8030 8071 8112 8153 8193 8234 8275 8316 39 15 1C 16 16 17 17 840 22 8357 8398 8439 8480 8521 8562 8602 8643 8684 8725 40 16 16 16 17 17 18 841 8766 8807 8848 8889 8930 8971 9012 9053 9094 9135 41 16 16 17 17 18 18 842 9176 9217 9258 9299 9340 9381 9422 9463 9504 9545 42 16 17 17 18 18 18 843 9586 9627 9668 9709 9751 9792 9833 9874 9915 9956 43 17 17 18 18 18 19 844 9997 0038 0079 0120 0162 0203 0244 0285 0326 0367 44 17 18 18 18 19 19 845 23 0409 0450 0491 0532 0573 0614 0656 0697 0738 0779 45 18 18 18 19 19 20 846 0821 0862 0903 0944 0985 1027 1068 1109 1151 1192 46 18 18 19 19 20 20 847 1233 1274 1316 1357 1398 1440 1481 1522 1564 1605 47 18 19 19 20 20 21 848 1646 1688 1729 1770 1812 1853 1894 1936 1977 2018 48 19 19 20 20 21 21 849 2060 2101 2143 2184 2225 2267 2308 2350 2391 2433 49 19 20 20 21 21 22 1 2 3 4 5 6 7 8 9 39 40 41 42 43 44 [22] TABLE I. Lo (l+x) Pro. Parts. Log 5 v / X 1 2 3 4 5 6 7 8 9 39J40 41 42 43 44 T850 23 2474 2516 2557 2598 2640 2681 2723 2764 2806 2847 1920 20 21 21 22 851 2889 2930 2972 3013 3055 3096 3138 3180 : 3221 3263 1 2020 21 21 22 22 852 3304 3346 3387 3429 3470 3512 3554 3595 3637 3678 2 20 21 21 22 22123 853 3720 3762 3803 3845 3887 3928 3970 401 2 ! 4053 4095 3 21 21 22 22 2323 854 4137 4178 4220 4262 4303 4345 4387 4428 4470 4512 4 21 22 22 23 23 24 855 4554 4595 4637 4679 4721 4762 4804 4846 4888 4929 5 21 22 23 23 24 24 856 4971 5013 5055 6097 5138 5180 5222 5264 5306 5347 6 22 22 23 24 2425 857 5389 5431 5473 5515 5557 5599 5640 5682 5724 5766 o7 2223 23 24 25:25 858 5808 5850 5892 5934 5976 6018 6059 6101 6143 6185 58 2323 24 24 2526 859 6227 6269 6311 6353 6395 6437 6479 6521 6563 6605 59 2324 24 25 2526 860 23 6647 6689 6731 6773 6815 6857 6899 6941 6983 7025 ;o 23 24 2525 26 26 861 7067 7110 7152 7194 7236 7278 7320 7362 7404 7446 61 24 24 2526 26 27 862 7488 7531 7573 7615 7657 7699 7741 7783 7826 7868 r2 24 26 2526 27 27 863 7910 7952 7994 8036 8079 8121 8163 8205 8248 8290 33 25 25 2626 27 28 864 8332 8374 8416 8459 8501 8543 8585 8628 8670 8712 64 25 26 2627 28 28 865 8755 8797 8839 8881 8924 8966 9008 9051 9093 9135 56 25 26 2727 28 29 866 9178 9220 9262 9305 9347 9390 9432 9474 9517 9559 66 26 26 2728 28 29 867 9602 9644 9686 9729 9771 9814 9856 9898 9941 9983 j7 26 27 2728 29 29 868 24 0026 0068 0111 0153 0196 0238 0281 0323 0366 0408 68 27 27 2829 29 30 869 0451 0493 0536 0578 0621 0663 0706 0748 0791 0834 69 27 28 2829 30 30 870 24 0876 0919 0961 1004 1046 1089 1132 1174 1217 1260 70 27 28 2929 30 31 871 1302 1345 1387 1430 1473 1515 1558 1601 1643 1686 71 28 2829 30 31 31 872 1729 1771 1814 1857 1900 1942 1985 2028 2070 2113 72 28 29 30 30 31 32 873 2156 2199 2241 2284 2327 2370 2412 2455 2498 2541 73 28 29 30 31 31 32 874 2584 2626 2669 2712 2755 2798 2840 2883 2926 2969 74 29 30 30 31 32 33 875 3012 3055 3098 3140 3183 3226 3269 3312 3355 3398 75 29 30 31 32 32 33 876 3441 3484 3526| 3569 3612 3655 3698 3741 3784 3827 76 30 30 31 32 33 33 877 3870 3913 3956 3999 4042 4085 4128 4171 4214 4257 77 30 31 32 32 33 34 878 4300 4343 4386 4429 4472 4515 4558 4601 4644 4687 78 3( 31 32 33 34 34 879 4730 4774 4817 4860 4903 4946 4989 5032 5075 5118 79 31 32 32 33 34 35 880 24 5162 5205 5248 5291 5334 5377 5420 5464 5507 5550 80 31 32 33 34 34 35 881 5593 5636 5680 5723 5766 5809 5852 5896 5939 5982 81 3232 33 34 35 36 882 6025 6069 6112 6155 6198 6242 6285 6328 6372 6415 82 3233 34 34 35 36 883 6458 6501 6545 6588 6631 6675 6718 6761 6805 6848 83 32'33 34 35 36 37 884 6891 6935 6978 7022 7065 7108 7152 7195 7239 7282 84 3334 34 35 36 37 885 7325 7369 7412 7456 7499 7543 7586 7629 7673 7716 85 333435 36 37 37 886 887 7760 8195 7803 8238 7847 8282 7890 8326 7934 8369 7977 8413 8021 8456 8064 8500 8108 8543 8151 8587 86 87 343435 34'3536 3( 37 37 37 38 38 888 8630 8674 8718 8761 8805 8849 8892 8936 8979 9023 88 3435'36 37 38 39 889 906" 9110 9154 9198 9241 9285 9329 9372 9416 9460 89 35|36j36 37 38 39 89C 249503 9547 9591 9635 9678 9722 9766 9809 9853 9897 90 35 36 37 38 3940 891 994 9984 0028 0072 0116 o!60 0203 o247 0291 0335 91 35 36 37 38 3940 892 25 037 0422 0466 0510 0554 0598 0642 0685 0729 0773 92 36 37 38 39 40 40 893 081 0861 0905 0949 0993 1036 1080 1124 1168 1212 93 36 37 3839 40 41 894 125 130C 1344 1388 1432 1476 1520 1564 1608 1652 94 37 38 39 39 40 41 89o 169 174C 1784 1828 1872 1916 1960 2004 2048 2092 95 37 38 39 4C 41 42 89 213 218C 2224 2268 2312 2356 2400 2444 2488 2532 96 37 3F 39 4C 41 42 89 257 262C 266 2709 2753 2797 2841 2885 2929 2973 97 38 39 4( 41 42 43 89 301 306$ 3106 3150 3194 3238 3283 3327 3371 3415 9b 38 39 4C 41 42 43 89 345 3504 354fc 3592 3636 3681 372 376 3813 3858 9S 39 4C 41 42 43 44 1 2 3 4 5 6 7 8 9 39 4C 41 45 43 44 [23] TABLE I. Log Log (l+x) Pro. Parts. X 1 2 3 4 5 6 7 8 Q 4546 47 48 49 50 1-900 0-25 3902 3946 3990 4035 4079 4123 4168 4212 4256 4301 OC 901 4345 4389 4434 4478 4522 4567 4611 4655 4700 4744 01 1 902 4788 4833 4877 4922 4966 5010 5055 5099 5144 5188 02 I 1 1 1 1 1 903 5233 5277 5321 5366 5410 5455 5499 5544 5588 5633 03 1 1 1 1 1 1 904 5677 5722 5766 5811 5855 5900 5944 5989 6033 6078 04 2 2 2 2 2 2 905 6122 6167 6212 6256 6301 6345 6390 6434 6479 6524 05 2 2 2 2 9 i 3 906 6568 6613 6657 6702 6747 6791 6836 6881 6925 6970 06 3 3 3 3 f t 3 907 7015 7059 7104 7149 7193 7238 7283 7327 7372 7417 07 3 3 o 3 t. 3 908 7462 7506 7551 7596 7641 7685 7730 7775 7820 7864 08 4 4 4 4 4 4 909 . 7909 7954 7999 8043 8088 8133 8178 8223 8268 8312 09 4 4 4 4 / K J 910 25 8357 8402 8447 8492 8537 8581 8626 8671 8716 8761 10 4 5 5 5 F 5 911 8806 8851 8896 8941 8985 9030 9075 9120 9165 9210 LI 5 r; ., K 1.; 5 K u 5 912 9255 9300 9345 9390 9435 9480 9525 9570 9615 9660 12 5 6 6 6 6 6 913 9705 9750 9795 9840 9885 9930 9975 0020 0065 ollO 13 6 6 6 6 6 7 914 26 0155 0200 0245 0290 0336 0381 0426 0471 0516 0561 14 6 6 7 7 "7 i 915 0606 0651 0696 0742 0787 0832 0877 0922 0967 1013 If 7 7 7 7 7 7 916 1058 1103 1148 1193 1238 1284 1329 1374 1419 1465 16 7 7 8 8 8 8 917 1510 1555 1600 1646 1691 1736 1781 1827 1872 1917 17 8 8 8 8 8 9 918 1962 2008 2053 2098 2144 2189 2234 2280 2325 2370 18 8 8 8 9 9 9 919 2416 2461 2506 2552 2597 2642 2688 2733 2779 2824 19 9 9 9 9 t 9 920 26 2869 2915 2960 3006 3051 3097 3142 3187 3233 3278 20 9 9 9 10 10 10 921 3324 3369 3415 3460 3506 3551 3597 3642 3688 3733 21 9 10 10 10 1C 11 922 3779 3824 3870 3915 3961 4006 4052 4098 4143 4189 22 10 10 10 11 11 11 923 4234 4280 4325 4371 4417 4462 4508 4553 4599 4645 23 10 11 11 11 11 11 924 4690 4736 4782 4827 4873 4919 4964 5010 5056 5101 24 11 11 11 12 12 12 925 5147 5193 5238 5284 5330 5376 5421 5467 5513 5558 25 11 11 12 12 12 13 926 5604 5650 5696 5741 5787 5833 5879 5925 5970 6016 20 12 12 12 12 13 13 927 6062 6108 6154 6199 6245 6291 6337 6383 6429 6475 27 12 12 13 13 13 13 928 6520 6566 6612 6658 6704 6750 6796 6842 6887 6933 28 13 13 13 13 14 14 929 6979 7025 7071 7117 7163 7209 7255 7301 7347 7393 29 1313 14 14 14 15 930 26 7439 7485 7531 7577 7623 7669 7715 7761 7807 7853 30 14 14 14 14 15 15 931 7899 7945 7991 8037 8083 8129 8175 8221 8267 8313 31 14 14 15 15 15 15 932 8360 8406 8452 8498 8544 8590 8636 8682 8728 8775 32 14 15 15 15 16 16 933 8821 8867 8913 8959 9005 9052 9098 9144 9190 9236 33 15 15 16 16 16 17 934 9283 9329 9375 9421 9467 9514 9560 9606 9652 9699 34 15 16 16 16 17 17 935 9745 9791 9837 9884 9930 9976 0023 0069 0115 0162 35 16 16 16 17 17 17 936 27 0208 0254 0301 0347 0393 0440 0486 0532 0579 0625 36 16 17 17 17 18 18 937 0671 0718 0764 0811 0857 0903 0950 0996 1043 1089 37 17 17 17 18 18 19 938 1135 1182 1228 1275 1321 1368 1414 1461 1507 1554 38 17 17 18 18 19 19 939 1600 1647 1693 1740 1786 1833 1879 1926 1972 2019 39 18 18 18 19 19 19 940 27 2065 2112 2158 2205 2252 2298 2345 2391 2438 2485 40 18 18 19 1920 20 941 2531 2578 2624 2671 2718 2764 2811 2858 2904 2951 41 18 19 19 2020 21 942 2998 3044 3091 3138 3184 3231 3278 3324 3371 3418 42 19 19 20 2021 21 943 3464 3511 3558 3605 3651 3698 3745 3792 3838 3885 43 19 20 20 2121 21 944 3932 3979 4026 4072 4119 4166 4213 4260 4306 4353 44 20 20 21 21 22 22 945 4400 4447 4494 4541 4587 4634 4681 4728 4775 4822 45 20 21 21 22 22 23 946 4869 4916 4963 5009 5056 5103 5150 5197 5244 5291 46 21 21 222223 23 947 5338 5385 5432 5479 5526 5573 5620 5667 5714 5761 47 21 22 22 2323 23 948 5808 5855 5902 5949 5996 6043 6090 6137 6184 6231 48 22 22 23 2324 24 949 6278 6325 6372 6419 6467 6514 6561 6608 6655 6702 49 22 23 23 24 24 25 1 2 3 4 K 6 7 8 9 45 46 47 48- 19 50 [24] ADDENDUM. I PROPOSE here to give some account of the origin and the object the raison d'etre of the preceding work, which was first issued in 1849, upwards of twenty years ago. Circumstances chiefly a desire to help a friend just com- mencing the study having led me to take up the subject of Life Contingencies, I found that there was one branch of it which had not received the amount of attention in the books to which its great importance entitles it. I refer to the construction of tables, which are, in fact, nothing less than the tools of the actuary : in their absence he is helpless, and unable to apply his theoretical results to practical purposes. I found that the methods indicated for their formation were generally of the most primitive character, and all of them insufficiently illustrated ; and I thought I saw the way to material improvement in these respects. Accordingly, by availing myself of relations subsisting amongst the elementary values of the Mortality Table, which had not been before noticed, and by the application of a new logarithmic table, of a form first suggested by the illustrious Gauss, I succeeded in organising methods of construction which seemed to me, if I may venture to say so, to leave little room for further improvement. To utilize my results, it was, of course, necessary that they should be placed within reach of those in a position to benefit by them. Had there existed then such a medium of communication amongst those interested in the science of Life Contingencies as we now have in the Journal of the Institute of Actuaries, I should have gladly offered for insertion in its pages a series of papers explaining and illustrating the methods I had devised. But the Institute had not been formed, and its Journal, consequently, 154 had not been established; and there was no other publication to which my communications could with propriety have been addressed. There was therefore no resource open to me, but that of separate and independent publication. In desiring publicity, I was actuated mainly, I believe, as already intimated, by a hope that I should thereby contribute something to the advancement of a science in which I was much interested; and also in a measure, I dare say why should I hesitate to confess it ? by a wish to air my hobby in the sight of those who might be expected to take an intelligent interest in its gambols. The reception accorded to my work on its appearance was such as far to exceed any expectations I had ventured to form, and to call for my grateful acknowledgments. In particular, I desire to place on record my sense of the generous appreciation it met with at the hands of the class to whom it was more specially addressed ; an appreciation in no degree modified, so far as I am aware, by the circumstance that the work was the production of an amateur one who might have been considered, and I think in other days would have been considered, as trespassing on a manor with which he had no concern. Personally, also, I have been frankly recognized as one "free of the craft," and have had an honourable place conferred upon me in the roll of members of the Institute. I never anticipated a large sale for my work, and in this respect my anticipation has been realised. The impression was by no means a large one, and there remain a number of copies still on hand. I solace myself by the belief that although, thanks mainly to the labours and the influence of the Institute, the number of students is now very much greater than it was in the days of Milne, it is nevertheless not yet large enough to take off a moderate edition of a purely scientific work (although practical withal) in twenty years. I propose to use up the remaining copies in the manner following : I have long been aware that an extension of Table I. in the negative direction was desirable.* The want of this extension, although it does not necessarily limit the applicability of the table, * See Preface, p. 15. 155 yet renders the use of it, in certain circumstances, somewhat inconvenient, or rather for the expression seems too strong less convenient than it is in other circumstances. And it has thus, I know, proved a hindrance to the employment of the table in cases in which such employment would have been productive of saving in both time and labour. I have now made the requisite extension, by which the incon- venience in question is removed ; and I utilize the remaining copies of the work by issuing them with the table in a complete form. To complete the copies already in circulation, the additional matter will be supplied to their possessors, free of charge, by the publishers, Messrs. Layton.* The necessary explanations follow. LONDON, IQth August, 1870. * Applications by post must enclose a penny stamp; and applications through the Trade will require to be accompanied by the names of the parties on whose behalf they are made. ON THE EXTENSION OF TABLE I. IN the preceding work it is shown (for the first time in regard to most of them) that all the values of Life Contingencies which it is usual and necessary to tabulate, may be formed in dependent series, in which each value helps in finding the next. In some of the cases the formation is effected by the continuous addition to an initial value, of the successive terms of a series easily and independently formed; while in others a tabular operation also is required for each value. It is with formations of the latter class only that we are now concerned. The tabular operation requisite in the class of formations referred to is in all cases reducible to that of finding the logarithm of [unity plus a number whose logarithm is known]. To effect this by the common tables presents no difficulty; but it requires two entries, one inverse and the other direct. Now, if we were provided with a table which should enable us to pass by a single direct entry from, say, log.x to log.(l+#), we should by its use effect a saving of at least one-half in the labour of this part of the work. We have such a table in the appended Table I. In it the argument extends from 3 to +2 : it therefore affords the means of dealing directly with any value of log.a; lying between those limits ; and this is a range wide enough to include all that could well arise in the construction of tables of the values of Life Contingencies. In the work, as originally issued, Table I. extended only from to + 2, and it therefore did not afford the means of so dealing with negative values of log.x. It was consequently necessary, when such values presented themselves, to have recourse to indirect processes, which, besides involving an increase of labour, occasioned also a depar- ture from the uniformity in the series of operations by which the several constructions would have otherwise been characterised. The defect which rendered this course necessary, has proved a greater idrance to the employment of the table than was anticipated ; and therefore it is that in the present re-issue it has been supplied. A few words as to the manner in which the extension of the table has been formed. It has not been a work of great labour. Very little )mputation, properly so called, has been necessary. The first thousand dues only, from 3 to 2, have required independent construction; remainder, from 2 to 0, were obtained very simply from the portion of the tables originally published, in virtue of a relation which subsists between values which correspond to complementary arguments. 158 We call complementary arguments a pair of terms in the argument series, which, being arithmetical complements of each other having their sums equal to nothing occupy places in the series on opposite sides of 0, at equal distances from it. Thus TOOOO and I'OOOO are complementary arguments; and so are 1-3628 and 0-6372. Hence in a table of equal extent on both sides of 0, each argument on one side will have its complementary argument on the other side ; and generally, the portion of the series on one side of will be complemen- tary, in reverse order, to the portion on the other side. Complementary results are the tabular results which belong to com- plementary arguments. The same things will obviously hold with regard to them that we have just seen to hold with regard to complementary arguments. Each result on either side of will have its complementary result on the other side; and the portions of the series of results on opposite sides of argument 0, will be complementary to each other in reverse order. The entire portions of the two series on opposite sides of being thus complementary, it follows that any two corresponding parts of them are also complementary, always in reverse order. Thus, referring to pages [6] and 21, let each of them be supposed to be extended by the addition of the next term in the argument column and in column 0. The two pages are now complementary. The one commences with 1-0000 and ends with 1-0500, while the other commences with 0-9500 and ends with 1-0000, which terms being complementary, in reverse order, the inter- mediate terms are also complementary in the same order. The columns in complementary pages are also complementary, each to each. That is, each column in the one page has a column complemen- tary to it in the other ; the relation consisting in this, that the results in each of them are complementary to those in the other, in reverse order. The complementary columns are those of which the headings are the complements of each other to 10. Thus, the columns headed and 0, 1 and 9, 2 and 8, 3 and 7, &c., are complementary, each to each. The relation subsisting between complementary results is hardly less simple than that subsisting betweem complementary arguments. If we used T as a functional symbol, to denote the tabular result correspond- ing to the appended argument, the equation characteristic of the table will be, T[log.*]=log.(l+4 In this, write - for ar, and we get, ., or -og.*= =log.(l 4-*)log.#=T[log.a:] log,*. 159 From this we learn that if from any result we subtract its argument, the remainder is the complementary result. For example : T [0-6372]=0-727306 Subtract 0-637200 Kemainder, 0090106=T [1-3628]. The complementary results are thus, 0727306 and 0-090106, cor- responding to the complementary arguments, 0-6372 and 1*3628, re- spectively. It is apparent from what has just been shown, that if the portion of the table on either side of is given, the portion on the opposite side can be formed by subtraction. And this is, in effect, the method that was employed for the extension of the table from I'OOOO to O'OOOO, the labour of formal subtraction, however, being avoided in the way now to be shown. In the subtractions here requisite it is to be observed that while the minuends and the remainders are complementary results, the subtra- hends would be successive terms of the argument series. Now in this series, considered as a series of six figure logarithms, the last two places are always ciphers, in every tenth term the last three places are ciphers, and in every hundredth term the last four places are ciphers. Comple- mentary results therefore will agree in every term in their last two places, in every tenth term in their last three places, and in every hundredth term in their last four places. To this extent then, that is to the extent of their last two, three, or four places, as the case may be, the terms of the portion of the table to be formed may be determined by inspection of their complementary terms, and inserted in their places. And this operation will be much facilitated by availing ourselves of the information we have acquired as to the relative positions in the table occupied by complementary results. Examination and comparison of any two complementary pages will afford sufficient illustration of what precedes. Refer again to pages [6] and 21, and take any two complementary columns, say 1 and 9. It will be perceived at once that the two terminal figures in either column are the same as those in the other, in reverse order. And the same will hold in the case of every pair of complementary columns. In the two columns however we find a closer agree- ment. In them the identity extends to three figures throughout, and in every tenth term to four. It is easy now to see that when the identical figures have been inserted in all the columns the completion of the table is a very simple matter. 160 The differences belonging to complementary results are complements of each other to 100. This may be shown as follows : Since T flog.-! =T[log.a?] log.* ; therefore, AT [log.-] = AT[log.*]- Alog.s= AT[log.*]- 100, since in our Table Alog.#=100. Transposing we have, AT[log.s] AT flog.-J = 100 ; which, since AT[log.#] and AT log.- are of opposite signs, establishes the theorem. For illustration refer to any two complementary openings, say pages [6], [7], and 20, 21. In the first opening the differences are 9, 10, 11, 12, and in the second 88, 89, 90, 91 ; and the terms of these, in reverse order, are respectively the complements of each other to 100. A similar property holds with regard to the table of proportional parts. Thus, opposite 80, for instance, we find in the former opening 7, 8, 9, 10, and in the latter 70, 71, 72, 73 ; and the terms of these, in reverse order, are respectively the complements of each other to 80. It will be obvious from this how the table of proportional parts has been completed. The portion of the table 2 to 1, is of only one-tenth the extent of its complementary portion 1 to 2 ; and it consists therefore of the com- plementary results of only every tenth term in the last-named portion, the terms being those in column 0. These terms, it will be recollected, agree in their last three places, and in every tenth term in their last four places, with their complementary terms. Hence in the portion of the table now under consideration, we have this agreement feo three places throughout, and in column to four places. This will be apparent on inspection. The remaining portion from 3 to 2, having no complementary portion on the opposite side of 0, was formed by interpolation. The basis was ten terms constructed independently, true to ten places. In the part of the table extending from 3 to 1 the differences change so rapidly that there is no room for the insertion of proportional parts. This is of no great importance as the differences are small, and this part of the table will but seldom come into use. The complete rule for the use of the differences is : Multiply the proper difference by the number composed of the last three figures of the argument, and strike off three figures from the right of the result. The remainder is the required proportional part. But the differences are so small that the proportional part will usually be determinable by inspection. 161 ON THE APPLICATION OF THE EXTENDED TABLE. A Table in "which the result is related to its argument as in Table I., can be most advantageously applied to the formation of the logarithm of the sum of two numbers whose logarithms are known, and without the necessity of first finding the numbers themselves. For, in the characteristic equation of the table, for x write a-^-b, and we get, That is, Tpog.a log. 5]= log. (a + 5) -log. 3; whence, Log. (a + b) =log.& + T[log. a log. b]. We may now, if we please, interchange a and 5; but it is not necessary as they are symmetrically involved, and there is no restriction as to their relative magnitudes. From the foregoing equation, if log. a and log. b are given, to form log. (a + b) we have the following Rule : Subtract either logarithm from the other, and to the subtrahend add the tabular result corresponding to the remainder. The sum is the logarithm required. We have thus in all cases two methods of solution. Both are shown in the following example. Two logarithms are 2-370267 and 2-045757; required the logarithm of the sum of the corresponding numbers 2-370267 2-045757 2-045757 0-324510 2-370267 1-675490 0-492915 0-168405 2-538672 2-538672 The given logarithms are those of 234-567 and 111 -111; the sum of these numbers is 345-678, and its logarithm is 2-538672, as here found. It is not easy to conceive a simpler operation than that by which this result has been obtained, or one admitting of more commodious arrange- ment. The given logarithms being set down one under the other, the lower is subtracted from the upper, and the difference placed at the side. The table is entered with this difference, and the result set down under the subtrahend. Addition of the last two lines then gives the required logarithm. In the two methods of solution, the differences of the given logarithms, which form the arguments for the table, are necessarily complementary 162 to each other, one of them therefore being positive and the other negative. The form of the operation is, nevertheless, the same in both cases. This is the advantage we gain by the negative addition to the table. It is no matter now in what order the two logarithms to be operated upon present themselves, whether the] greater over the less, or the less over the greater. The upper is always the minuend, the lower is always the subtrahend, and the remainder always forms the tabular argument. On pp. 80, 81, the following Lemma is demonstrated: "If B denote " the present value of a benefit of 1 upon a given life or combination " of lives, and such that, in the case of a combination of lives the risk " is determined by the failure of any one of them; and if Bj denote the " present value of a similar benefit on a life or a combination of lives " respectively one year older than those on which B depends; if, more- " over, TT denote the probability of a payment of B being received in the " first year, and II the probability of the single life, or of all the lives, "on which that benefit depends, surviving a year; then will the " following equation always subsist : " B=cn+Bl '" On passing to logarithms this equation becomes, log.B=log.i;n + log.^ + B 1 ) ............... (A) Now this is obviously a case suited for the application of Table I. We pass from log.Bi to log.B by adding together log. til and logY^ + B! J. Log. rll, log. and log.Bj are known, the two former being terms of series independently formed, and log. B! being the result of a like operation for the preceding age. We have therefore, from what precedes, log.^+B 1 )=log.B I +T[log.j!j-log.:B I ] ) or=log.+T[log.B,-log.g. Adopting the second form as best suited for our purpose, we obtain by substitution in (A), log.B=log.t;n + log.g + T [log^ - log.jH . And finally, changing the order of the first two terms of the right hand side of this equation, we have for the type of the operation requisite to pass from log.B! to log.B : 163 A log. B! BI A log-Or-5- ) Dt-A B log.rll C T[D,-X| D (A+B+C t=:log.B B By giving to the different symbols in this general type suitable values we produce the particular types adapted to the various benefits. Thus, for an annuity on (x) we have B 1 =% +1 , ~B=a x ; ir=p x , and H=p x , and consequently 7r-f-II=l, the logarithm of which is 0. The type in this case therefore becomes : A B T[C,] (A + B See p. 84. And this again becomes changed into that for the curtate mean duration of (x) by making v=l. See p. 63. For an assurance on (x) we have B^A^!, B=A a: ; 7r=l #p and IL=p x , .'. 7r-f-n=^ A .~ 1 1 ; and the type becomes : A A B C D log.t^ (A + B+C D.-A See p. 92. For further examples see pp. 75, 101, 115. 164 We now repeat some of the formations already given, availing our- selves of the facility afforded by the extension of the table. Present Values of Annuities. Page 85. One Life. Two Lives. 103 102 101 100 99 510042 765314 121755 10 887079 841035 248195 34 089264 878017 347916 35 225968 900013 428505 43 328561 882428 495626 41 378095 32363 77104 1-22818 1-68255 2-13089 2-38833 103 103 102 102 101 101 100 100 032921 -10788 543465 044489 2 587956 -38722 694907 142129 .16 837052 -68715 768872 227133 21 996026 -99089 812863 299035 13 111911 777693 360574 6 1-29392 98 138273 1-37491 103 102 288193 -19418 619186 072053 lOS) U 1Q1 I 696254 731890 175170 18 907078 101 100 790867 257015 99 j 047916 795278 325640 8 120926 49688 80738 11665 32107 98 773283 365674 15 138972 The cases in which Table I. comes into use divide themselves into two classes. In the first class, which comprises Curtate Mean Durations, and Annuities (certain, for terms of years, or on one or more lives) the tabular argument in each operation is always the result of the previous operation. The process is somewhat simpler than in the cases comprised in the second class, in the operations belonging to which the argument is the difference between two logarithms, one of which is the preceding result. The annuity process has been chosen as the type of the first class of cases, and comparison of the examples as given above with the same examples in their original form, will show the improvement the operation has undergone by the use of the extended table. It will be observed that, as formerly, the proportional parts are still made to occupy a separate line. Experience has amply confirmed the propriety of this arrangement. It is found to contribute in a most material degree to the facility and rapidity with which the table may be used. The mental incorporation of the proportional parts, which is thus avoided, is the portion of an operation which soonest induces fatigue when a number of entries have to be made ; and it is also that in which when it is used the greatest liability to error is found. 165 The chief advantage of the annuity operation, when conducted by means of the present table, over the same when conducted by means of the common table, is, that here all the entries of the same kind direct and inverse are brought together, the whole of the logarithms being formed before a single natural number is taken out. We consequently proceed right through the table, and as we proceed we find two, three, four, and even as many as six or eight entries on the same opening. At the close, moreover, the taking out of the numbers may, if necessary, be turned over to an assistant. On the other hand, when the common tables are used, direct and inverse entries alternate with each other, and involve likewise a continual turning of the leaves backwards and forwards, by which the process is rendered exceedingly irksome. On the whole it may with safety be affirmed, that no one who will give the new method of formation, with the additional facility now afforded, a fail' trial, will ever again seek to have recourse to the old method. It is sufficiently well understood that for the proper solution of a case involving, say n lives, we require to know the value of an annuity, or some other integral function, on those lives, and also, when orders of survivorship are concerned, the values of the like on one, two, or more similar adjoining combinations of lives. When n does not exceed 2, we have the requisite values, according to various rates of interest, in the tables of Jones and others : and therefore we can solve rigorously all cases in which one or two lives are involved. But it is otherwise when the number of lives is more than two. We have no tables suited to such cases ; the reason being that the labour requisite for their construc- tion is so great that no one hitherto has had the hardihood to undertake it.* The consequence is, that when cases involving more than two lives present themselves, as they frequently do, we are obliged to have recourse to methods of approximation, the results of which have no claim to be considered as other than vague guesses at the truth. We are not likely then, proceeding on the present plan, ever to be put in possession of the means of dealing satisfactorily with cases involv- ing more than two lives. But we have recently had presented to us a prospect of deliverance from this condition of comparative helpless- ness. It has been shown to us how, by the aid of a small amount of tables, we may acquire the power of treating rigorously cases involving any number of lives whatsoever. It is to Mr. W. M. Makeham that we owe this great advance. Mr. M. propounds a theory of the law of mortality, which he shows to possess strong claims to acceptance on physiological grounds, and also from the accordance of its results with observed facts. It is a modification and extension of the now famous theory of the late Mr. Gompertz, in a * At a single rate of interest a complete annuity table for three Urea would comprise 161,700 values, and one for four lives, so many aa 3,921,225 values. 166 direction in which Mr. Gompertz distinctly stated that his theory needed modification and extension. Mr. Makeham's theory may be applied to the adjustment of any given table of mortality. An immediate result of this application, being that with which we are here more immediately concerned, is, that if we form from the table so adjusted a table of the values of annuities on all the combinations of n lives (n being any integer), in which the ages are equal, we shall be able to deduce thence, by an easy process, the value of an annuity on any combination of the same number of lives that may be proposed, and consequently differing among themselves anyhow as to age. We thus, at the cost of the construction of an annuity table of not more than a hundred values (the labour of construction being no greater for a dozen lives than for one), acquire the power of legitimately dealing with every case involving the same number of lives as that for which the table has been constructed. Surely this is a great improvement one, indeed, the importance of which, in the present connexion, can hardly be over-estimated. It opens a way for the effectual removal of that which has hitherto been the opprobium of the science of Life Contingencies the inability to deal rigorously with cases involving more than two lives ; and it cannot be but that its value and utility will ere long be generally recognised. When the anticipated period arrives, there will arise a necessity for the construction of tables of annuities on many lives, at various rates of interest, and according to different tables of mortality; and it is to afford the requisite facility for the construction of these that Table I. has been extended in the negative direction so far as 3-0000. For two lives it will seldom, if ever, be necessary to go beyond 1 '0000 ; but for so many as five or six, the portion of the table between 3 and 2 will come into use. An example of the construction of a table of annuities on six lives of equal ages is appended. The data are, as usual, the Carlisle Table of Mortality, and 3 per cent, interest. The index of the initial term is 3, and of the next 2. It is hardly necessary to say that the auxiliary series is log.vp XJUtM = log.u + 6 log./?,. Annuities. Six Lives. Equal Ages. 103 102 101 124437 656069 000577 656646 110395 019237 28 129660 00133 04536 13479 101 100 129660 332292 054909 7 387208 24390 99 559048 -36228 99 559048 358753 134255 12 98 493020 '31119 3~32293 117660 6 97 449959 '28181 167 Annuities. Six Lives. Equal Ages. (Continued) 97 449959 348432 107811 13 96 456256 '28593 294805 109204 12 95 404021 -25353 237529 098129 4 94 335662 '21660 205159 035137 11 93 290307 -19512 131160 077411 1 92 208572 -16165 110395 065065 10 91 175470 '14979 200569 060608 9 90 261186 -18247 354817 072776 13 89 427606 -26767 89 427606 340308 103006 1 88 443315 -27753 352339 106369 3 87 458711 '28755 426919 109761 2 86 536682 -34410 484999 128410 21 85 613430 -41061 536586 149398 84 685993 '48528 83 560971 171778 31 732780 592063 187628 28 54048 82 779719 -60217 612841 204701 7 81 817549 '65697 81 817549 648955 219297 19 80 868271 73837 658765 240111 30 79 898906 79233 686953 253415 3 78 940371 '87171 691015 272205 33 77 963253 -91887 703999 283020 25 76 987044 -97061 725550 294579 22 75 020151 1*04749 740928 311196 26 74 052150 1-12759 775218 327861 27 73 103106 1-26796 The effect of the faulty graduation of the Carlisle Table is here strikingly manifest. The annuity value at 99 is greater than that at 86, and two-and-a-half times as great as that at 91. The second class of cases in which Table I. comes into use, comprises Complete Mean Durations (one life), Probabilities of Survivorship (two lives), Assurances (one life), Survivorship Assurances (two lives), Sick Allowances, &c. We have selected for illustration the examples of Complete Mean Duration, p. 65, Assurance, whole life, p. 93, and Sur- vivorship Assurance, two lives, equal ages, p. 103. Assurance, on (a?) against Complete Mean Duration. One Life. 104 698970 -50000 301030 T'397940 522879 096902 8 103 920819 '83333 Assurance. One Life. 104 987163 -970874 301030 Teseiss 510042 171843 11 103 982926 '961448 Equal Ages. 104 686133 -485437 602060 T084073 032921 049737 8 103 684726 '483867 168 Complete Mean Duration. One Life. 103 920819 Assurance. One Life. 103 982926 Assurance, on (?) against (y). Equal Ages. 103 684726 124939 1795880 778151 210823 30 823909 0-159017 765314 387766 10 948848 1-735878 543465 188718 27 102 113943 1-30000 102 976999 -948415 102 681058 '479798 079181 0-034762 853872 318726 32 602060 374939 841035 527737 27 681241 999817 694907 300930 9 101 251811 176572 101 970859 -935101 101 677087 '475430 057992 193819 890855 408652 12 455932 514927 878017 630698 21 513924 163163 768872 390192 37 100 357511 2-17778 100 964668 -921866 100 673025 -471004 045757 311754 912850 484264 36 346787 617881 900013 711607 66 392544 280481 812863 463477 53 99 442907 2*77*73 99 958473 -908810 99 668937 -466592 055517 387390 895265 636495 64 435728 522745 882428 636685 35 491245 177692 777693 398846 55 98 487341 3-07143 98 954876 -901313 98 667839 -465413 By comparison of the above with the original operations, on the pages cited, the advantage gained by the extension of the table will become very apparent. A very excellent six-figure table, suitable for use with the present tables, is the following : " Logarithmisch-Trigonometrische Tafeln mit Sechs Decimalstellen. Mit Rucksicht auf den Schulgebrauch bearbeitet von Dr. C. Bremiker. Berlin, 1869." The short title in Latin is, " Tabula Logarithmorum VI. Decimalium." Like the seven-figure tables, this table has a five-figure argument j and it is much more easily used than they when the seventh figure is not wanted. It contains a table of log.(l+#), to argument log.*, like Table I. As this table extends no further in the positive direction than 0*2500, its usefulness in annuity computations is extremely limited.* * Bremiker's Work may be obtained through Messrs. Williams & Norgate, Henrietta Street, Covent Garden, for the extremely moderate cost of three shillings and sixpence. TABLE I. Log Log (1+a?) Pro. Parts. X 1 2 3 4 5 6 7 8 9 45 46 47 48 49 50 1-950 0-27 6749 6796 6843 6891 6938 6985 7032 7079 7126 7174 50 22 23 23 24 24 25 951 7221 7268 7315 7362 7409 7457 7504 7551 7598 7646 51 23 23 24 2425 25 952 7693 7740 7787 7835 7882 7929 7976 8024 8071 8118 52 23 24 24 2525 26 953 8165 8213 8260 8307 8355 8402 8449 8497 8544 8591 53 24 24 25 25126 27 954 8639 8686 8733 8781 8828 8876 8923 8970 9018 9065 54 24 25 25 26 26 27 955 9113 9160 9207 9255 9302 9350 9397 9445 9492 9540 55 25 25 26 26 27 27 956 9587 9634 9682 9729 9777 9824 9872 9919 9967 0014 56 25 26 26 27 27 28 957 28 0062 0109 0157 0205 0252 0300 0347 0395 0442 0490 57 20 26 27 27 28 29 958 0538 0585 0633 0680 0728 0776 0823 0871 0918 0966 58 26 27 27 28 28 29 959 1014 1061 1109 1157 1204 1252 1300 1347 1395 1443 59 27 27 28 28 29 29 960 28 1490 1538 1586 1633 1681 1729 1777 1824 1872 1920 60 27 2828 29 20 30 961 1968 2015 2063 2111 2159 2206 2254 2302 2350 2398 61 27 2829 29 30 31 962 2445 2493 2541 2589 2637 2685 2732 2780 2828 2876 62 28 2929 30 3(. 31 963 2924 2972 3020 3068 3115 3163 3211 3259 3307 3355 63 28 2930 30 31 31 964 3403 3451 3499 3547 3595 3643 3691 3739 3787 3835 64 29 29 3C 31 31 32 965 3882 3930 3978 4026 4074 4122 4171 4219 4267 4315 65 29 30 31 31 32 33 966 4363 4411 4459 4507 4555 4603 4651 4699 4747 4795 66 30 30 31 3232 33 967 4843 4891 4940 4988 5036 5084 5132 5180 5228 5277 67 30 31 31 3233 33 968 5325 5373 5421 5469 5517 5566 5614 5662 5710 5758 68 31 31 32 3333 34 969 5807 5855 5903 5951 5999 6048 6096 6144 6192 6241 69 31 32 32 3334 35 970 28 6289 6337 6386 6434 6482 6530 6579 6627 6675 6724 70 32 32 33 34 34 35 971 972 6772 7256 6820 7304 6869 7352 6917 7401 6965 7449 7014 7498 7062 7546 7110 7594 7159 7643 7207 7691 71 72 3233 3233 33 34 34 35 35 35 35 36 973 7740 7788 7837 7885 7934 7982 8031 8079 8128 8176 73 33 34 34 35 36 37 974 8225 8273 8322 8370 8419 8467 8516 8564 8613 8661 74 33 34 35 36 30 37 975 8710 8758 8807 8856 8904 8953 9001 9050 9099 9147 75 34 34 35 36 37 37 976 9196 9244 9293 9342 9390 9439 9488 9536 9585 9634 76 34 35 36 36 37 38 977 9682 9731 9780 9828 9877 9926 9974 0023 0072 0121 77 35 35 36 37 38 39 978 29 0169 0218 0267 0316 0364 0413 0462 0511 0559 0608 78 35 36 37 37 38 39 979 0657 0706 0755 0803 0852 0901 0950 0999 1047 1096 79 36 36 37 38 30 39 980 29 1145 1194 1243 1292 1341 1389 1438 1487 1536 1585 80 3637 38 38 30 40 981 1634 1683 1732 1781 1830 1878 1927 1976 2025 2074 81 3637 38 39 40 41 982 2123 2172 2221 2270 2319 2368 2417 2466 2515 2564 82 37 38 30 30 40 41 983 2613 2662 2711 2760 2809 2858 2907 2956 3006 3055 83 37 38 30 40 41 41 984 3104 3153 3202 3251 3300 3349 3398 3447 3496 3546 84 38 39 30 40 41 42 985 3595 3644 3693 3742 3791 3841 3890 3939 3988 4037 85 38 39 40 41 42 43 986 4086 4136 4185 4234 4283 4332 4382 4431 4480 4529 86 30 40 40 41 42 43 987 4579 4628 4677 4726 4776 4825 4874 4924 4973 5022 87 30 40 41 42 43 43 988 5071 5121 5170 5219 5269 5318 5367 5417 5466 5515 88 40 40 41 42 43 44 989 5565 5614 5664 5713 5762 5812 5861 5911 5960 6009 69 40 41 42 43 44 45 990 29 6059 6108 6158 6207 6257 6306 6355 6405 6454 6504 90 40 41 42 43 44 45 991 6553 6603 6652 6702 6751 6801 6850 6900 6949 6999 91 41 42 43 44 45 45 992 7048 7098 7148 7197 7247 7296 7346 7395 7445 7495 92 41 42 43 44 45 46 993 7544 7594 7643 7693 7743 7792 7842 7891 7941 7991 93 42 43 44 45 40 47 994 8040 8090 8140 8189 8239 8289 8338 8388 8438 8487 94 42 43 44 45 40 47 995 8537 8587 8637 8686 8736 8786 8836 8885 8935 8985 95 43 44 45 46 47 47 996 9035 9084 9134 9184 9234 9284 9333 9383 9433 9483 96 43 44 45 46 47 48 997 9533 9582 9632 9682 9732 9782 9832 9882 9931 9981 07 44 45 46 47 4^ 49 998 30 0031 0081 0131 0181 0231 0281 0331 0380 0430 0480 98 44 45 46 ^7 48 49 999 0530 0580 0630 0680 0730 0780 0830 0880 0930 0980 99 45 40 47 48 49 49 1 2 3 4 5 6 7 8 9 45 4(1 47 48 49150 TABLE I. Log Log(l+*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 50 51 52 53 54 55 O'QOO 0-30 1030 1080 1130 1180 1230 1280 1330 1380 1430 1480 00 001 1530 1580 1630 1680 1731 1781 1831 1881 1931 1981 01 1 1 1 1 002 2031 2081 2131 2182 2232 2282 2332 2382 2432 2482 02 1 1 1 1 1 ] 003 2533 2583 2633 2683 2733 2784 2834 2884 2934 2984 03 2 2 2 2 2 9 004 3035 3085 3135 3185 3236 3286 3336 3386 3437 3487 04 2 2 2 2 2 2 005 3537 3587 3638 3688 3738 3789 3839 3889 3940 3990 06 2 3 a 3 3 3 006 4040 4091 4141 4191 4242 4292 4343 4393 4443 4494 06 3 3 3 3 3 j 007 4544 4595 4645 4695 4746 4796 4847 4897 4948 4998 07 4 4 4 '4 4 i 008 5048 5099 5149 5200 5250 5301 5351 5402 5452 5503 08 4 4 4 4 4 L 009 5553 5604 5654 5705 5755 5806 5857 5907 5958 6008 09 4 5 5 K 5 K 010 30 6059 6109 6160 6211 6261 6312 6362 6413 6464 6514 10 5 5 5 5 5 6 on 6565 6615 6666 6717 6767 6818 6869 6919 6970 7021 11 6 6 6 6 6 6 012 7071 7122 7173 7224 7274 7325 7376 7426 7477 7528 12 6 6 6 6 6 013 7579 7629 7680 7731 7782 7832 7883 79341 7985 8036 13 6 7 7 7 i 7 014 8086 8137 8188 8239 8290 8341 8391 8442 8493 8544 14 7 7 7 7 8 8 015 8595 8646 8696 8747 8798 8849 8900 8951 9002 9053 15 8 8 8 8 8 8 016 9104 9155 9206 9256 9307 9358 9409 9460 9511 9562 16 8 8 8 8 9 c 017 9613 9664 9715 9766 9817 9868 9919 9970 0021 0072 17 8 9 9 9 9 9 018 31 0123 0174 0225 0276 0327 0378 0430 0481 0532 0583 18 9 9 9 10 10 10 019 0634 0685 0736 0787 0838 0889 0941 0992 1043 1094 19 10 10|10|10 10 10 020 31 1145 1196 1247 1299 1350 1401 1452 1503 1555 1606 20 10 10 10 11 11 11 021 1657 1708 1759 1811 1862 1913 1964 2016 2067 2118 21 10 11 11 11 11 12 022 2169 2221 2272 2323 2374 2426 2477 2528| 2580 2631 22 11 11 11 12 12 12 023 2682 2734 2785 2836 2888 2939 2990 3042 3093 3144 23 12 12 12 12 12 13 024 3196 3247 3299 3350 3401 3453 3504 3556 3607 3658 24 12 12 12 13 13 13 025 3710 3761 3813 3864 3916 3967 4019 4070 4122 4173 25 12 13 13 13 14 14 026 4225 4276 4328 4379 4431 4482 4534 4585 4637 4688 26 13 13 14 14 14 14 027 4740 4791 4843 4894 4946 4998 5049 5101 5152 5204 27 14 14 14 14 15 15 028 5256 5307 5359 5410 5462 5514 5565 5617 5669 5720 28 14 14 15 15 15 15 029 5772 5824 5875 5927 5979 6030 6082 6134 6186 6237 29 14 15 15 15 16 16 030 31 6289 6341 6392 6444 6496 6548 6599 6651 6703 6755 30 1515 16J16 16 16 031 6807 6858 6910 6962 7014 7066 7117 7169 7221 7273 31 1616 1616 17 17 032 7325 7377 7428 7480 7532 7584 7636 7688 7740 7791 32 1616 17 17 17 18 033 7843 7895 7947 7999 8051 8103 8155 8207 8259 8311 33 1617 17 17 18 18 034 8363 8415 8467 8519 8571 8622 8674 8726 8778 8830 34 17^7 18 18 18 19 035 8882 8935 8987 9039 9091 9143 9195 9247 9299 9351 35 1818 18 19 19 19 036 9403 9455 9507 9559 9611 9663 9715 9768 9820 9872 36 1818 19 19 19 20 037 9924 9976 0028 0080 0132 0185 o237 o289 0341 0393 37 1819 19 20 20 20 038 32 0445 0498 0550 0602 0654 0706 0759 0811 0863 0915 38 1919 20 20 21 21 039 0968 1020 1072 1124 1177 1229 1281 1333 1386 1438 39 2020 20|21 21 21 040 32 1490 1543 1595 1647 1700 1752 1804 1857 1909 1961 40 20 20 21 21 22 041 2014 2066 2118 2171 2223 2276 2328 2380 2433 2485 41 20 21 21 22 22 23 042 2538 2590 2642 2695 2747 2800 2852 2905 2957 3009 42 21 21 2222 23 23 043 3062 3114 3167 3219 3272 3324 3377 3429 3482 3534 43 22 22 2223 23 24 044 3587 3640 3692 3745 3797 3850 3902 3955 4007 4060 44 22 2223 23 24 24 045 4113 4165 4218 4270 4323 4376 4428 4481 4533 4586 45 22 2323 24 24 25 046 4639 4691 4744 4797 4849 4902 4955 5007 5060 5113 46 23 23124 24 25 25 047 5165 5218 5271 5324 5376 5429 5482 5535 5587 5640 47 24 24 24 25 25 26 048 049 5693 6221 5746 6274 5798 6326 5851 6379 5904 6432 5957 6485 6009 6538 6062 6591 6115 6643 6168 6696 48 49 24 24 2425 2525 25 26 26 26 26 27 1 2 3 4 5 6 7 8 9 50 5152 5354 55 TABLE I. Log Log(l+;r) Pro. Parts. X 1 2 3 4 5 6 7 8 9 50 51 52 53 54 55 0-050 0-32 674S 6802 6855 690S 6961 7014 7067 7119 7172 7225 50 25 26 26 27 27 28 051 7278 7331 7384 7437 7490 7543 7596 7649 7702 7755 51 26 26 27 27 28 28 052 7808 7861 7914 796? 8020 8073 8126 8179 8232 828o 52 26 27 27 28 28 29 053 8338 8391 8444 8497 8550 8603 8656 8709 8763 8816 53 26 27 28 2829 29 054 8869 8922 8975 902S 9081 9134 9187 9241 9294 9347 54 27 28 28 29 29 30 055 9400 9453 9506 9560 9613 9666 9719 9772 9826 9879 55 28 28 29(29 30 30 056 9932 9985 0038 0092 0145 0198 0251 0305 0358 0411 56 28 29 29 30 30 31 057 33 0464 0518 0571 0624 0678 0731 0784 0838 0891 0944 57 2812930 30:31 31 058 0998 1051 1104 1158 1211 1264 1318 1371 1424 1478 58 29303013131 32 059 1531 1585 1638 1691 1745 1798 1852 1905 1958 2012 59 30 30 31 31 32 32 060 332065 2119 2172 2226 2279 2333 2386 2440 2493 2547 60 30 31 3132 32 33 061 2600 2654 2707 2761 2814 2868 2921 2975 3028 3082 61 30 31 3232 33 34 062 313513189 3243 3296 3350 3403 3457 3511 3564 3618 62 31 32*323333 34 063 3671 3725 3779 3832 3886 3940 3993 4047 4101 4154 63 32 32 33 33 34 35 064- 4208 4262 4315 4369 4423 4476 4530 4584 4637 4691 64 32 33 33!34 35 35 065 4745 4799 4852 4906 4960 5014 5067 5121 5175 5229 65 32 33 3434 35 36 066 5283 5336 5390 5444 5498 5552 5605 5659 5713 5767 6633 34 3435 36 36 067 5821 5875 5928 5982 6036 6090 6144 6198 6252 6306 67 34 34 3536 36 37 068 6360 6413 6467 6521 6575 6629 6683 6737 6791 6845 68 34 35 3536 37 37 069 6899 6953 7007 7061 7115 7169 7223 7277 7331 7385 69 34 35 36 37 37 38 070 33 7439 7493 7547 7601 7655 7709 7763 7817 7871 7925 70 35 36 36 37 38 38 071 7979 8033 8087 8142 8196 8250 8304 8358 8412 8466 71 36 36 37 3838 39 072 8520 8575 8629 8683 8737 8791 8845 8899 8954 9008 72 36 37 37 38;39 40 073 9062 9116 9170 9225 9279 9333 9387 9441 9496 9550 73 36 37 38 39 39 40 074 9604 9658 9713 9767 9821 9876 9930 9984 0038 0093 74 37 38 38 39 40 41 075 34 0147 0201 0256 0310 0364 0419 0473 0527 0582 0636 75 38 38 39 40 41 41 076 0690 0745 0799 0853 0908 0962 1017 1071 1125 1180 76 38 39 4040 41 42 077 1234 1289 1343 1398 1452 1506 1561 1615 1670 1724 77 33 39 4041 42 42 078 1779 1833 1888 1942 1997 2051 2106 2160 2215 2269 78 3940 41 41 42 43 079 2324 2378 2433 2487 2542 2597 2651 2706 2760 2815 79 40 40 41 42 43 43 080 34 2869 2924 2979 3033 3088 3142 3197 3252 3306 3361 80 40 41 12 4243 44 081 3416 3470 3525 3580 3634 3689 3744 3798 3853 3908 81 40 41 12 1311 45 082 3962 4017 4072 4127 4181 4236 4291 4346 4400 4455 82 41 42!43 43 44 45 083 4510 4565 4619 4674 4729 4784 4838 4893 4948 5003 83 42 42 43:44 45 46 084 5058 5113 5167 5222 5277 5332 5387 5442 5496 5551 84 42 43 11 45 15 46 085 5606 5661 5716 5771 5826 5881 5936 5990 6045 6100 85 42 434445 46 47 086 6155 6210 6265 6320 6375 6430 6485 6540 6595 6650 86 43 4445464647 087 6705 6760 6815 6870 6925 6980 7035 7090 7145 7200 87 44 44 45 46 47 18 088 7255 7310 7365 7420 7475 7530 7585 7641 7696 7751 8844 45 46 47:48 48 089 7806 7861 7916 7971 8026 8081 8137 8192 8247 8302 89 44 45 16 17 18 49 090 34 8357 8412 8468 8523 8578 8633 8688 8743 8799 8854 90 45 46 47 48 19 50 091 092 8909 9462 8964 9517 9020 9572 9075 9627 9130 9683 9185 9738 9241 9793 9296 9849 9351 9904 9406 9959 91 92 46 46 46 47 47 48 49J50 48495051 093 35 0015 0070 0125 0181 0236 0291 0347 0402 0457 0513 93 46 47 18495051 094 0568 0624 0679 0734 0790 0845 0901 0956 1012 1067 94 47 48 495051 52 095 1122 1178 1233 1289 1344 1400 1455 1511 1566 1622 95 48484950,31 52 096 1677 1733 1788 1844 1899 1955 2010 2066 2121 2177 96 484950515253 097 2233 2288 2344 2399 2455 2510 2566 2622 2677 2733 97 48 195051 52 53 098 2788J 2844 2900 2955 3011 3067 3122 3178 3234 3289 98 19 50 jl 5253 54 099 3345 3401 3456 3512 3568 3623 3679 3735 3790 3846 99 50 50. 51-5253. >4 1 2 3 4 5 6 7 8 9 50 51, 5253, 54, 55 TABLE I. Log Lc gO+*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 56 57 58 59 60 61 o-ioo 0-35 3902 3958 4013 4069 4125 4181 4236 4292 4348 4404 00 101 4459 4515 4571 4627 4683 4738 4794 4850 4906 4962 01 1 1 1 1 1 j 102 5018 5073 5129 5185 5241 5297 5353 5409 5465 5520 02 1 1 1 1 1 103 5576 5632 5688 5744 5800 5856 5912 5968 6024 6080 03 2 2 2 2 104 6136 6192 6248 6304 6360 6416 6472 6528 6584 6640 04 2 9 2 2 9 105 6696 6752 6808 6864 6920 6976 7032 7088 7144 7200 05 r 3 3 3 3 3 106 7256 7312 7368 7424 7480 7536 7593 7649 7705 7761 06 | f 3 4 / L 107 7817 7873 7929 7985 8042 8098 8154 8210 8266 8322 07 4 4 4 4 4 L 108 8379 8435 8491 8547 8603 8660 8716 8772 8828 8884 08 4 t 5 5 c 5 109 8941 8997 9053 9109 9166 9222 9278 9335 9391 9447 09 5 5 5 5 c 110 35 9503 9560 9616 9672 9729 9785 9841 9898 9954 0010 10 6 6 6 6 6 6 111 36 0067 0123 0179 0236 0292 0349 0405 0461 0518 0574 11 6 6 6 6 r r 112 0630 0687 0743 0800 0856 0913 0969 1026 1082 1138 12 r t r 7 7 7 f 113 1195 1251 1308 1364 1421 1477 1534 1590 1647 1703 13 7 7 8 8 8 8 114 1760 1816 1873 1929 1986 2043 2099 2156 2212 2269 14 8 8 8 8 8 9 115 2325 2382 2439 2495 2552 2608 2665 2722 2778 2835 15 8 9 9 9 < j 116 2891 2948 3005 3061 3118 3175 3231 3288 3345 3401 16 c c 9 9 10 10 117 3458 3515 3572 3628 3685 3742 3798 3855 3912 3969 17 10 10 10 10 10 10 118 4025 4082 4139 4196 4252 4309 4366 4423 4480 4536 18 10 10 10 11 11 119 4593 4650 4707 4764 4820 4877 4934 4991 5048 5105 19 11 11 11 11 11 9 120 36 5162 5218 5275 5332 5389 5446 5503 5560 5617 5674 20 11 11 12 12 12 9 121 5730 5787 5844 5901 5958 6015 6072 6129 6186 6243 21 1 12 12 12 13 J 122 6300 6357 6414 6471 6528 6585 6642 6699 6756 6813 22 1 13 13 13 13 J 123 6870 6927 6984 7041 7098 7155 7212 7269 7326 7384 23 1 13 13 14 14 L 124 7441 7498 7555 7612 7669 7726 7783 7840 7898 7955 24 1 14 14 14 14 5 125 8012 8069 8126 8183 8240 8298 8355 8412 8469 8526 25 I 14 15 15 15 15 126 8584 8641 8698 8755 8812 8870 8927 8984 9041 9099 26 1 15 15 15 16 16 127 9156 9213 9270 9328 9385 9442 9500 9557 9614 9671 27 1 15 16 16 16 16 128 9729 9786 9843 9901 9958 0015 0073 0130 0187 0245 28 16 16 16 17 17 17 129 37 0302 0360 0417 0474 0532 0589 0646 0704 0761 0819 29 16 17 17 17 17 18 130 37 0876 0934 0991 1048 1106 1163 1221 1278 1336 1393 30 17 17 17 18 18 18 131 1451 1508 1566 1623 1681 1738 1796 1853 1911 1968 31 17 18 18 18 19 19 132 2026 2083 2141 2198 2256 2314 2371 2429 2486 2544 32 18 18 19 19 19 20 133 2602 2659 2717 2774 2832 2890 2947 3005 3062 3120 33 18 19 19 19 20 20 134 3178 3235 3293 3351 3408 3466 3524 3581 3639 3697 34 19 19 20 20 20 21 135 3755 3812 3870 3928 3985 4043 4101 4159 4216 4274 35 20 20 20 21 21 21 136 4332 4390 4448 4505 4563 4621 4679 4736 4794 4852 36 20 21 21 21 22 22 137 4910 4968 5026 5083 5141 5199 5257 5315 5373 5431 37|21 21 21 22 22 23 138 5488 5546 5604 5662 5720 5778 5836 5894 5952 6010 3821 22 2222 23 23 139 6067 6125 6183 6241 6299 6357 6415 6473 6531 6589 39 22 22 23 23 23 24 140 37 6647 6705 6763 6821 6879 6937 6995 7053 7111 7169 40 22 23 23 24 24 24 141 7227 7285 7343 7401 7459 7518 7576 7634 7692 7750 41 23 23 24 24 25 25 142 7808 7866 7924 7982 8040 8099 8157 8215 8273 8331 42 24 24 24 25 25 26 143 8389 8447 8506 8564 8622 8680 8738 8797 8855 8913 43 24 25 25 25 26 26 144 8971 9029 9088 9146 9204 9262 9321 9379 9437 9495 44 25 25 26 26 26 27 145 9554 9612 9670 9728 9787 9845 9903 9962 0020 0078 45 25 26 26 27 27 27 146 380137 0195 0253 0312 0370 0428 0487 0545 0603 0662 46 26 26 27 27 28 28 147 0720 0778 0837 0895 0954 1012 1070 1129 1187 1246 47 26 27 27 2828 29 148 1304 1363 1421 1480 1538 1596 1655 1713 1772 1830 48 27 27 28 2829 29 149 1889 1947 2006 2064 2123 2181 2240 2298 2357 2416 49 27 28 28 29 29 30 1 2 3 4 5 6 7 8 9 50 57 58 59 60 61 TABLE I. Log Log (1+ar) Pro. Parts. X 1 2 3 4 5 6 7 8 9 50 56 57|58 28 29 29 59J6061 303031 0-150 0-38 2474 2533 2591 2650 2708 2767 2825 2884 2943 3001 151 3060 3118 3177 3236 3294 3353 3412 3470 3529 3588 51 292930!303li31 152 3646 3705 3764 3822 3881 3940 3998 4057 4116 4174 52293030!313l!32 153 4233 4292 4351 4409 4468 4527 4585 4644 4703 4762 5330;30313132 32 154 4821 4879 4938 4997 5056 5114 5173 5232 5291 5350 54 30 31 31 32,32 33 155 5409 5467 5526 5585 5644 5703 5762 5820 5879 5938 55 31 31 32 3233 34 156 5997 6056 6115 6174 6233 6292 6351 6409 6468 6527 5631 32132 3334 34 157 158 6586 7176 6645 7235 6704 7294 6763 7353 6822 7412 6881 7471 6940 7530 6999 7589 7058 7648 7117 7707 57 32 32: 33 34 34 583233343435 35 35 159 7766 7825 7884 7943 8002 8062 8121 8180 8239 8298 593334343535 36 160 161 38 8357 8948 8416 9007 8475 9067 8534 9126 8593 9185 8653 9244 8712 9303 8771 9363 8830 9422 8889 9481 603434353536 613435353637 37 37 162 9540 9599 9659 9718 9777 9836 9896 9955 0014 0073 6235'35 I 3637 37 38 163 39 0133 0192 0251 0311 0370 0429 0488 0548 0607 0666 6335363737 38 38 164 0726 0785 0844 0904 0963 1022 1082 1141 1201 1260 64363637 38 38 39 165 1319 1379 1438 1497 1557 1616 1676 1735 1795 1854 65 36 37 38 38 39 40 166 1913 1973 2032 2092 2151 2211 2270 2330 2389 2449 66^713838 39 40 40 167 2508 2568 2627 2687 2746 2806 2865 2925 2984 3044 67383839 40 40 41 168 3103 3163 3222 3282 3342 3401 3461 3520 3580 3640 68 38 39 39 40 41 41 169 3699 3759 3818 3878 3938 3997 4057 4117 4176 4236 69 39 3940 41 41 42 170 39 4296 4355 4415 4475 4534 4594 4654 4713 4773 4833 70 39 40 41 41 42 43 171 4892 4952 5012 5072 5131 5191 5251 5311 5370 5430 71 40 40 41 42 43 43 172 5490 5550 5609 5669 5729 5789 5849 5908 5968 6028 72 40 41 42 42 4344 173 6088 6148 6208 6267 6327 6387 6447 6507 6567 6627 7341 4242 43 44 45 174- 6686 6746 6806 6866 6926 6986 7046 7106 7166 7226 7441 4243 44 44 45 175 7286 7346 7405 7465 7525 7585 7645 7705 7765 7825 7542 4343 44 45 46 176 7885 7945 8005 8065 8125 8185 8245 8305 8365 8425 7643 4344 45 46 46 177 8485 8546 8606 8666 8726 8786 8846 8906 8966 9026 77 43 4445 45 46 47 178 9086 9146 9206 9267 9327 9387 9447 9507 9567 9627 78 44 4445 46 47 48 179 9688 9748 9808 9868 9928 9988 0049 0109 0169 0229 79 44 45 46 47 47 48 180 40 0289 0350 0410 0470 0530 0591 0651 0711 0771 0832 80 45 464647 48 49 181 0892 0952 1012 1073 1133 1193 1254 1314 1374 1435 81 45 464748 49 49 182 1495 1555 1616 1676 1736 1797 1857 1917 1978 2038 824647 4848 49 50 183 2098 2159 2219 2280 2340 2400 2461 2521 2582 2642 83 46 47 4849 50 51 184 2703 2763 2823 2884 2944 3005 3065 3126 3186 3247 844748 4950 50 51 185 3307 3368 3428 3489 3549 3610 3670 3731 3791 3852 8548 48 49 50 51 52 186 3912 3973 4033 4094 4155 4215 4276 4336 4397 4457 86 48 49 5051 52 52 187 4518 4579 4639 4700 4761 4821 4882 4942 5003 5064 87 49 50 50|51 5253 188 189 5124 5731 5185 5792 5246 5853 5306 5913 5367 5974 5428 6035 5488 6096 5549 6156 5610 6217 5670 6278 88 89 4950 5051 5152 5253 5354 5354 190 191 192 40 6339 6947 7555 6399 7007 7616 6460 7068 7677 6521 7129 7738 6582 7190 7799 6642 7251 7859 6703 7312 7920 6764 7372 7981 6825 7433 8042 6886 7494 8103 905051 915152 92 52 52 52 53 53 53 54 54 5455 5556 5556 193 8164 8225 8286 8347 840S 8469 8530 8591 8652 8713 935253 5455 56,57 194 8774 8835 8896 8957 9018 9079 9140 9201 9262 9323 945354 5555 56!57 195 9384 9445 9506 9567 9628 9689 9750 9811 9872 9933 955354 5556 57158 196 9994 0056 0117 0178 0239 0300 0361 o422 0483 0545 965455 5657 5859 197 41 0606 0667 0728 0789 0850 0911 0973 1034 1095 1156 97 5455 56'57 5859 198 1217 1279 1340 1401 1462 1524 1585 1646 1707 1768 98 55 56 57 58 ; 59 60 199 1830 1891 1952 2014 2075 2136 2197 2259 2320 2381 99 5556 57J5859:60 1 2 3 4 5 6 7 8 9 5657 58596061 TABLE I. Log Log(l+*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 61 62|62 64 65 66 0200 0-41 2443 2504 2565 262 r 2688 274S 2811 2872 2933 299 01 C C C C i 201 3056 3117 3179 324C 3302 3362 3424 3486 3547 360 01 1 1 1 1 202 3670 3731 3793 3854 3916 397 r 403S 410C 4162 422 Ov 1 1 1 1 203 4284 4346 4407 446S 4530 4592 4652 4715 4776 483 03 2 f q 2 204 4900 4961 5023 5084 5146 520" 526 533C 5392 545 04 1 2 \ a 3 205 5515 5577 5638 570C 576 582: 5885 5946 6008 607 05 < 3 3 3 206 6131 6193 6255 6316 6378 644C 6501 6562 6625 668 00 4 4 4 4 4 - 207 6748 6810 6871 6933 6995 7056 711S 718C 7242 7303 0? 4 4 4 4 5 5 208 9ftQ 7365 7Qft*i 7427 004,^ 7489 S107 7550 s his 7612 fiQQf 7674 COQ5 7736 OOK/ 779S S4.1 7859 ft4,7 792 QKQC 08 on I 5 5 uy / yot) OUTi O1U t 1 U" OcOU o 15 15 15 : 16 16 225 7941 8004 8066 8129 8192 8254 8317 8380 8442 8505 ~ u 15 16 16 16 16 1 7 226 8568 8631 8693 8756 8819 8882 8944 9007 9070 9133 8 16 16 16 7 17 :7 227 9195 9258 9321 9384 9447 9509 9572 9635 9698 9761 7 16 17 [7 7 18 18 228 9823 9886 9949 0012 0075 o!38 0201 0263 o326 0389 8 17 17 18 8 18 18 229 43 0452 0515 0578 0641 0704 0767 0829 0892 0955 1018 9 18 18 18 9 19 9 230 43 1081 1144 1207 1270 1333 1396 1459 1522 1585 1648 18 19 19 9 19 20 231 1711 1774 1837 1900 1963 2026 2089 2152 2215 2278 1 19 19 20 20 20 20 232 2341 2404 2467 2530 2593 2656 2719 2782 2846 2909 2 20 20 20 20 21 21 233 2972 3035 3098 3161 3224 3287 3350 3414 3477 3540 3 20 20 21 ^1 21 22 234 3603 3666 3729 3792 3856 3919 3982 4045 4108 4172 4 21 21 21 ^2 22 22 235 4235 4298 4361 4424 4488 4551 4614 4677 4741 4804 5 21 22 22 2 23 23 236 4867 4930 4994 5057 5120 5184 5247 5310 5373 5437 6 22 22 23 3 2.3 24 237 5500 5563 5627 5690 5753 5817 5880 5943 6007 6070 7 23 23 23 4- 24 24 238 6133 6197 6260 6324 6387 6450 6514 6577 6641 6704 8 23 24 24 -t 25 25 239 6767 6831 6894 6958 7021 7085 7148 7211 7275 7338 9 24- 24- 25 5 25 ?6 240 43 7402 7465 7529 7592 7656 r '719 7783 7846 7910 7973 24 25 25 6 26 26 241 8037 8100 8164 8227 8291 8355 8418 8482 8545 8609 1 25 25 26 6 27 27 242 8672 8736 8800 8863 8927 8990 9054 9118 9181 9245 2 26 26 26 7 27 ?8 243 9308 9372 9436 9499 9563 9627 9690 9754 9818 9881 3 2G 27 27 8 28 >8 244 9945 0009 0072 o!36 0200 0264 0327 0391 0455 0518 4- 27 27 28 8 29 >9 245 44 0582 0646 0710 0773 0837 0901 0965 1029 1092 1156 5 27 28 28 9 29 30 246 1220 1284 1348 1411 1475 1539 1603 1667 1730 1794 6 28 29 29 9 30 30 247 1858 1922 1986 2050 2114 2177 2241 2305 2369 2433 7 2929 30 31 1 248 2497 2561 2625 2689 2752 2816 2880 2944 3008 3072 8 2930 30 1 31 2 249 3136 3200 3264 3328 3392 3456 3520 3584 3648 3712 9 30 30 31 _^ 32 2 1 2~ 3 4 5 () 7 8 9 3162 S3 4 35 6 TABLE I. Log Log (1 -far) Pro. Parts. X 1 2 3 4 5 6 7 8 9 61 62 63 64 65 66 0-250 0-44 3776 3840 3904 3968 4032 4096 4160 4224 4288 4352 50 31 31 32 32 33 33 251 4416 4480 4544 4608 4673 4737 4801 4865 4929 4993 5l|31 32 3233 33 34 252 5057 5121 5185 5249 5314 5378 5442 5506 5570 5634 52 32 32 3333 34 34 253 5698 5763 5827 5891 5955 6019 6084 6148 6212 6276 53 32 33 3334 34 35 254 6340 6405 6469 6533 6597 6662 6726 6790 6854 6919 54 33 33 3435 35J36 255 6983 7047 7111 7176 7240 7304 7369 7433 7497 7562 55 34 34 3535 3636 256 7626 7690 7755 7819 7883 7948 8012 8076 8141 8205 56 34 35 35|36 36;37 257 8269 8334 8398 8463 8527 8591 8656 8720 8785 8849 57 35 35 3636 3738 258 8913 8978 9042 9107 9171 9236 9300 9365 9429 9493 58 35 36 37 37 3838 259 9558 9622 9687 9751 9816 9880 9945 0009 0074 0139 59 36 3 r 37 38 38 39 260 45 0203 0268 0332 0397 0461 0526 0590 0655 0719 0784 60 37 3 r- 38 38 39 40 261 0849 0913 0978 1042 1107 1172 1236 1301 1366 1430 61 37 38 38 39 4040 262 1495 1559 1624 1689 1753 1818 1883| 1947 2012 2077 62 38 38 39 40 40 41 263 2141 2206 2271 2336 2400 2465 2530 2594 2659 2724 63 38 39 40 40 41 42 264 2789 2853 2918 2983 3048 3112 3177 3242 3307 3372 64 39 40 40 41 42 42 265 3436 3501 3566 3631 3696 3760 3825 3890 3955 4020 65 40 40 41 42 42 43 266 4085 4149 4214 4279 4344 4409 4474 4539 4604 4668 66 40 41 42 42 43 44 267 4733 4798 4863 4928 4993 5058 5123 5188 5253 5318 67 41 42 42 43 44 44 268 5383 5448 5513 5578 5643 5708 5773 5838 5903 5968 68 41 42 43 44 44 45 269 6033 6098 6163 6228 6293 6358 6423 6488 6553 6618 69 42 43 43 44 45 46 270 45 6683 6748 6813 6878 6943 7008 7073 7138 7204 7269 70 43 43 44 45 45 46 271 7334 7399 7464 7529 7594 7659 7724 7790 7855 7920 71 43 44 45 45 46 47 272 7985 8050 8115 8181 8246 8311 8376 8441 8507 8572 72 44 45 45 46 47 48 273 8637 8702 8767 8833 8898 8963 9028 9094 9159 9224 73 45 45 46 47 47 48 274 9289 9355 9420 9485 9551 9616 9681 9746 9812 9877 74 45 46 47 47 48 49 275 9942 0008 0073 0138 0204 0269 0334 0400 0465 0531 75 46 46 47 48 49 49 276 46 0596 0661 0727 0792 0857 0923 0988 1054 1119 1184 76 46 47 48 49 49 50 277 1250 1315 1381 1446 1512 1577 1643 1708 1773 1839 77 47 48 49 49 50 51 278 1904 1970 2035 2101 2166 2232 2297 2363 2428 2494 78 48 48 49 50 51 51 279 2559 2625 2691 2756 2822 2887 2953 3018 3084 3149 79 48 49 50 51 51 52 280 463215 3281 3346 3412 3477 3543 3609 3674 3740 3805 80 49 50 50 51 52 53 281 3871 3937 4002 4068 4134 4199 4265 4331 4396 4462 81 49 50 51 52 53 53 282 4528 4593 4659 4725 4790 4856 4922 4988 5053 5119 82 50 51 52 52 53 54 283 5185 5251 5316 5382 5448 5514 5579 5645 5711 5777 83 51 51 52 53 54 55 284 5842 5908 5974 6040 6106 6171 6237 6303 6369 6435 84 51 52 53 54 55 55 285 6501 6566 6632 6698 6764 6830 6896 6962 7027 7093 85 52 53 54 54 55 56 286 7159 7225 7291 7357 7423 7489 7555 7621 7687 7753 86 52 53 54 55 56 57 287 7818 7884 7950 8016 8082 8148 8214 8280 8346 8412 87 53 54 55 56 57 57 288 8478 8544 8610 8676 8742 8808 8874 8940 9006 9072 88 54 55 55 56 57 58 289 9138 9204 9271 9337 9403 9469 9535 9601 9667 9733 89 54 55 06 57 58 59 290 46 9799 9865 9931 9997 0064 0130 0196 0262 0328 0394 90 55 56 57 58 59 59 291 47 0460 0527 0593 0659 0725 0791 0857 0924 0990! 1056 91 56 56 57 58 5960 292 1122 1188 1255 1321 1387 1453 1519 1586 1652 1718 92 56 57 58 59 6061 293 1784 1851 1917 1983 2050 2116 2182 2248 2315 2381 93 57 58 59 60 60 61 294 2447 2514 2580 2646 2713 2779 2845 2912 2978 3044 94 57 58 59 60 61 62 295 3111 3177 3243 3310 3376 3442 3509 3575 3642 3708 95 58 59 60 61 62 63 296 3774 3841 3907 3974 4040 4107 4173 4239 4306 4372 96 59 60 60 61 62 63 297 4439 4505 4572 4638 4705 4771 4838 4904 4971 5037 97 59 60 61 62 63 64 298 5104 5170 5237 5303 5370 5436 5503 5569 5636 5702 98 80 61 62 S3 64 65 299 5769 5836 5902 5969 6035 6102 6168 6235 6302 6368 99 50 61 62 33 64 65 1 2 3 4 5 6 7 8 9 31 62 3 34 55 36 TABLE I. Log Log(l- f*) Pro. Parts. X 1 2 3 4 5 t> 7 8 9 67 6 6 7( )7 72 0-300 0-47 6435 6501 6568 6635 6701 6768 6835 6901 696 703 00 t t C ) 301 7101 7168 7235 7301 7368 7435 750 7568 763^ 770 01 1 1 302 7768 7835 7902 7968 8035 8102 8169 8235 830 836 02 1 1 1 303 8436 8502 8569 8636 8703 8769 8836 8903 897 903 03 2 i < 304 9104 9170 9237 9304 9371 9438 950o 9571 963 970o 04 t a 2 3 305 9772 9839 9906 9973 0039 0106 0173 0240 o30 0374 05 s a 4 4 306 48 0441 0508 0575 0642 0709 0776 0843 0909 097 1043 06 4 4 4 4 307 1110 1177 1244 1311 1378 1445 1512 157S 1646 1713 07 5 5 5 5 308 1780 1847 1914 1981 2048 2116 2183 225C 2317 2384 08 A 5 6 6 309 2451 2518 2585 2652 2719 2786 2853 292C 2988 3055 09 6 6 6 6 310 48 3122 3189 3256 3323 3390 3457 3525 3592 3659 3726 10 7 7 f 311 3793 3860 3928 3995 4062 4129 4196 4264 433 4398 11 7 7 8 8 312 4465 4533 4600 4667 4734 4801 4869 4936 5003 507 12 8 8 8 9 313 5138 5205 5272 5340 5407 5474 5542 5609 5676 5743 13 9 9 c 9 314 5811 5878 5945 6013 6080 6148 6215 6282 6350 6417 14 9 10 10 10 10 10 315 6484 6552 6619 6686 6754 6821 6889 6956 7024 7091 15 10 10 10 10 11 11 316 7158 7226 7293 7361 7428 7496 7563 7630 7698 7765 16 11 11 1 11 11 12 317 7833 7900 7968 8035 8103 8170 8238 8305 8373 8440 17 11 12 12 12 12 12 318 8508 8575 8643 8711 8778 8846 8913 8981 9048 9116 18 12 12 12 13 13 13 319 9183 9251 9319 9386 9454 9521 9589 9657 9724 9792 19 13 13 i: 13 13 14 320 48 9860 9927 9995 0062 0130 0198 0265 0333 0401 0468 20 13 14 14 14 14 14 321 49 0536 0604 0671 0739 0807 0875 0942 1010 1078 1145 21 14 14 14 I C 1 5 15 322 1213 1281 1349 1416 1484 1552 1620 1687 1755 1823 22 15 15 15 1 *\ 16 16 323 1891 1958 2026 2094 2162 2230 2297 2365 2433 2501 23 15 16 16 16 16 [7 324 2569 2637 2704 2772 2840 2908 2976 3044 3112 3179 24 16 16 17 17 17 1 325 3247 3315 3383 3451 3519 3587 3655 3723 3791 3858 25 17 17 17 18 18 18 326 3926 3994 4062 4130 4198 4266 4334 4402 4470 4538 26 17 18 18 18 18 19 327 4606 4674 4742 4810 4878 4946 5014 5082 5150 5218 27 18 18 J C 19 19 9 328 5286 5354 5422 5490 5558 5626 5694 5762 5830 5899 28 19 19 19 20 20 20 329 5967 6035 6103 6171 6239 6307 6375 6443 6511 6580 29 19 20 20 20 21 21 330 49 6648 6716 6784 6852 6920 6988 7057 7125 7193 7261 3020 20 21 21 21 22 331 7329 7397 7466 7534 7602 7670 7738 7807 7875 7943 31 21 2121 22 22 22 332 8011 8080 8148 8216 8284 8353 8421 8489 8557 8626 3221 22 22 22 23 2'; 333 8694 8762 8830 8899 8967 9035 9104 9172 9240 9309 33 22 22 23 23 23 24 334 9377 9445 9514 9582 9650 9719 9787 9855 9924 9992 3423 23 23 24 24 24 335 500061 0129 0197 0266 0334 0403 0471 0539 0608 0676 35'23 24 24 24 25 25 336 0745 0813 0881 0950 1018 1087 1155 1224 1292 1361 3624 2425 '5 26 ? 6 337 1429 1498 1566 1635 1703 1772 1840 1909 1977 2046 72525 26 26 26 t-7 338 2114 2183 2251 2320 2388 2457 2526 2594 2663 2731 S 25 26 26 27 27 7 339 2800 2868 2937 3006 3074 3143 3211 3280 3349 3417 9 26 27 27 27 28 28 340 50 3486 3554 3623 3692 3760 3829 3898 3966 4035 4104 40 27 27 28 28 28 29 341 4172 4241 4310 4378 4447 4516 4585 4653 4722 4791 127 2828 99 29 30 342 4859 4928 4997 5066 5134 5203 5272 5341 5409 5478 2* 28 2929 9 30 30 343 5547 5616 5685 5753 5822 5891 5960 6029 6097 6166 329 29|30 31 31 344 6235 6304 6373 6442 6510 6579 6648 6717 6786 6855 44 29 30|30 1 31 32 345 6924 6992 7061 7130 7199 7268 7337 7406 7475 7544 5. 30 31(31 2 32 32 346 7613 7681 7750 7819 7888 7957 8026 8095 8164 8233 631 3132 2 33 33 347 8302 8371 8440 8509 8578 8647 8716 8785 8854 8923 7313232 3 33 34 348 8992 9061 9130 9199 9268 9337 9406 9475 9544 9613 832, 33, 33 4 34 35 349 9683 9752 9821 9890 9959 0028 0097 0166 0235 0304 933, 33, 34 4 35 J5 1 2 3 4 5 6 7 8 9 ( )?< 38 ( 39 71 "2 TABLE I. Log Log(l+ar) Pro. Parts. X 1 2 3 4 5 6 7 8 9 676869 70 71 72 0350 0-51 0374 0443 0512 0581 0650 0719 0788 0858 0927 0996 5034343535 3636 351 1065 1134 1203 1273 1342 1411 1480 1549 1619 1688 51 34353536:36:37 352 1757 1826 1895 1965 2034 2103 2172 2242 2311 2380 5235353636-3737 353 2449 2519 2588! 2657 2727 2796 2865 2934 3004 3073 53363637 37 38 38 354 3142 3212 3281 3350 3420 3489 3558 3628 3697 3767 54 36 37j37 38 38J39 355 3836 3905 3975 4044 4113 4183; 4252 4322 4391 4460 55373713838 3940 356 4530 4599 4669! 4738 4808 4877! 4946 5016 5085 5155 56383839394040 357 5224 5294 5363' 5433 5502 5572 5641 5711 5780 5850 573839394040 ! 41 358 5919 5989 6058 6128 6197 6267 6336 6406 6475 6545 58393940 41 4142 359 6615 6684 6754 6823 6893 6962 7032 7102 7171 7241 59404041 41 4242 360 51 7310 7380 7450 7519 7589 7659 7728 7798 7867 7937 60404141 424343 361 8007 8076 8146 8216 8285 8355 8425 8495 8564 8634 61 41 41 42 434344 362 8704 8773 8843 8913 8983 9052 9122 9192 9261 9331 62424243|43,444o 363 9401 9471 9541 9610 9680 9750 9820 9889 9959 0029 63 42 43 43|44 4545 364 52 0099 0169 0238 0308 0378 0448 0518 0588 0657 0727 644344 44 45 4546 365 0797 0867 0937 1007 1077 1146 1216 1286 1356 1426 G544!44 45 46 46 47 366 1496 1566 1636 1706 1776 1846 1915 1985 2055 2125 66 44 45;46;46J47 48 367 2195 2265 2335 2405 2475 2545 2615 2685 2755 2825 67 >4546 46147 48 4b 368 369 2895 3595 2965 3665 3035 3735 3105 3805 3175 3875 3245 3946 3315 4016 3385 4086 3455 4156 3525 4226 68 69 46 46 46 47 47 48 48 48 48 49 k9 50 370 52 4296 4366 4436 4506 4576 4647 4717 4787 4857 4927 70 47 48 48 49 50 50 371 4997 5067 5138 5208 5278 5348 5418 5488 5559 5629 71 48 48 49 50 50 51 372 5699 5769 5839 5910 5980 6050 6120 6190 6261 6331 72 48 49 50 50 51 52 373 6401 6471 6542 6612 6682 6752 6823 6893 6963 7033 73 49 50 50 51 52 53 374 7104 7174 7244 7315 7385 7455 7526 7596 7666 7737 74 50 50 5152 53 53 375 7807 7877 7948 8018 8088 8159 8229 8299 8370 8440 75 50 51 5-2 52 53J54 376 8511 8581 8651 8722 8792 8863 8933 9003 9074 9144 76 51 52 52 53 54 55 377 9215 9285 9356 9426 9496 9567 9637 9708 9778 9849 77 52 52 53J54I55J55 378 9919 9990 0060 0131 0201 0272 0342 0413 0483 0554 78J52 53 54|55|55|56 379 53 0624 0695 0765 0836 0906 0977 1048 1118 1189 1259 7953 54 55 5556 57 380 53 1330 1400 1471 1542 1612 1683 1753 1824 1895 1965 8054 54 55 56157 58 '381 2036 2106 2177 2248 2318 2389 2460 2530 2601 2672 81 54 55 56;57 58 58 382 2742 2813 2884 2954 3025 3096 3166 3237 3308 3379 8255 56 5757 58 59 383 3449 3520 3591 3661 3732 3803 3874 3944 4015 4086 83156 56 5758 59 60 384 4157 4228 4298 4369 4440 4511 4581 4652 4723 4794 845657 58J59 60 60 385 4865 4936 5006 5077 5148 5219 5290 5361 5431 5502 8557 58 59 60 eoiei 386 5573 5644 5715 5786 5857 5927 5998 6069 6140 6211 86 5858596061 62 387 6282 6353 6424 6495 6566 6637 6708 6778 6849 6920 87 58!59!60j61 62 63 388 6991 7062 7133 7204 7275 7346 7417 7488 7559 7630 88|59|60'61 6262 63 389 7701 7772 7843 7914 7985 8056 8127 8198 8269 8340 89 6061 61 62 63 64 390 538411 8483 8554 8625 8696 8767 8838 8909 8980 9051 90 6061 6263 64 65 391 9122 9193 9264 9336 9407 9478 9549 9620 9691 9762 91 6162 636465 66 392 9833 9905 9976 0047 0118 0189 0260 0332 o403 o474 92 6263636465 66 393 54 0545 0616 0688 0759 0830 0901 0972 1044 1115 1186 93 6263 646566 67 394 1257 1329 1400 1471 1542 1614 1685 1756 1828 1899 94 6364 65 66 67 68 395 1970 2041 2113 2164 2255 2327 2398 2469 2541 2612 95 64 65 ee'ee 67 68 396 2683 2755 2826 2897 2969 3040 3111 3183 3254 3325 96 64i6566'67! 68 69 397 3397 3468 3540 3611 3682 3754 3825 3897 3968 4039 976566!67;6869 70 398 4111 4182 4254 4325 4397 4468 4540 4611 4682 4754 98666768,69170 71 399 4825 4897 4968 5040 5111 5183 5254 5326 5397 5469 99 66 67 68 39 70 71 1 2 3 4 5 6 7 8 9 6768 69 70 71 72 TABLE I. Log Log(l-fx) Pro. Parts. X 1 2 3 4 5 6 7 8 9 P 72 73 74 75 76 0-4-00 54 5540 5612 5684 5755 5827 5898 5970 6041 6113 6184 00 ojo 401 6256 6328 6399 6471 6542 66 14| 6685 6757 6829 6900 01 1 1 1 1 1 1 402 6972 7044 7115 7187 7258 7330 7402 7473 7545 7617 02 1 1 1 1 2 403 7688 7760 7832 7903 7975 8047 8118 8190 8262 8334 03 2 2 2 2 2 404 8405 8477 8549 8620 8692 8764 8836 8907 8979 9051 04 3 3 3 3 3 405 9123 9194 9266 9338 9410 9481 9553 9625 9697 9769 05 4 4 4 4 4 406 9840 9912 9984 0056 o!28 o!99 0271 0343 0415 o487 06 4 4 4 4 4 407 55 0559 0631 0702 0774 0846 0918 099U 1062 1134 1206 07 5 5 5 5 5 408 1277 1349 1421 ! 1493 1565 1637 1709 1781 1853 1925 08 6 6 6 6 6 409 1997 2069 2141 2213 2284 2356 2428 2500 2572 2644 09 6 6 7 7 7 410 552716 2788 2860 2932 3004 3076 3148 3220 3292 3364 10 7 7 7 7 8 8 411 3437 3509 3581 3653 3725 3797 3869 3941 4013 4085 11 8 8 8 8 8 8 412 4157 4229 4301 4373 4446 4518 4590 4662 4734 4806 12 9 9 9 9 9 9 413 4878 4950 5022 5095 5167 5239 5311 5383 5455 5528 13 9 9 9 10 10 10 414 5600 5672 5744 5816 5888 5961 6033 6105 6177 6250 14 10 10 10 10 10 11 415 6322 6394 6466 6538 6611 6683 6755 6827 6900 6972 15 11 11 11 11 11 11 416 7044 7116 7189 7261 7333 7406 7478 7550 7623 7695 16 11 12 12 12 12 12 417 7767 7839 7912 7984 8056 8129 8201 8273 8346 8418 17 12|12 12 13 13 13 418 8491 8563 8635 8708 8780 8852 8925 8997 9070 9142 18 13 13 13 13 14 14 419 9214 9287 9359 9432 9504 9576 9649 9721 9794 9866 19 13 14 14 14 14 14 420 55 9939 oOll 0084 0156 0229 0301 0373 0446 0518 0591 20 14 14 15 15 15 15 421 56 0663 0736 0808 0881 0953 1026 1099 1171 1244 1316 21 15 15 15 16 16 16 422 1389 1461 1534 1606 1679 1751 1824 1897 1969 2042 22 16 16 16 16 16 17 423 2114 2187 2260 2332 2405 2477 2550 2623 2695 2768 23 16 17 17 17 17 17 424 2841 2913 2986 3058 3131 3204 3276 3349 3422 3494 24 17 17 18 18 18 18 425 3567 3640 3712 3785 3858 3931 4003 4076 4149 4221 25 18 18 18 19 19 19 426 4294 4367 4440 4512 4585 4658 4731 4803 4876 4949 26 18 19 19 19 20 20 427 5022 5094 5167 5240 5313 5386 5458 5531 5604 5677 27 19192020 20 21 428 5750 5822 5895 5968 6041 6114 6187 6260 6332 6405 28 20 20 20 21 21 21 429 6478 6551 6624 6697 6770 6842 6915 6988 7061 7134 29J21 21 21 21 22 22 430 56 7207 7280 7353 7426 7499 7572 7645 7717 7790 7863 3021 22 22 22 22 23 431 7936 8009 8082 8155 8228 8301 8374 8447 852( 8593 3 1 22 22 23 23 23 24 432 433 8666 9396 8739 9469 8812 9542 8885 9616 8958 9689 9031 9762 9104 9835 9177 9908 9250 9981 9323 0054 32 23 23 23 24 3:} 23 24I24J24 24 25 24 25 434 57 0127 0200 0273 0346 0419 0493 0566 0639 0712 0785 34 24 24 25 25 26 26 435 0858 0931 1004 1078 1151 1224 1297 1370 1443 1517 35 25 25 26 26 26 27 436 1590 1663 1736 1809 1883 1956 2029 2102 2175 2249 36 26 26 26 27 27 27 437 2322 2395 2468 2542 2615 2688 2761 2835 2908 2981 37 26 27 27 27 28 28 438 3054 3128 3201 3274 3347 3421 3494 3567 3641 3714 38 27J2728 28 28 29 439 3787 3861 3934 4007 4081 4154 4227 4301 4374 4447 39 28J2828 29 29 30 440 574521 4594 4667 4741 4814 4888 4961 5034 5108 5181 40 28 29 29 30 30 30 441 5255 5328 5401 5475 5548 5622 5695 5769 5842 5915 41 29 30 30 30 31 31 442 5989 6062 6136 6209 6283 6356 6430 6503 6577 6650 42 30 30 31 31 32 32 44:3 6724 6797 6871 6944 7018 7091 7165 7238 7312 7385 43 31 31 31 32 32 33 444 7459 7532 7606 7680 7753 7827 7900 7974 8047 8121 44 313232 33 33 33 445 8195 8268 8342 8415 8489 8563 8636 8710 8783 8857 45 32 32 33 '33 34 34 446 8931 9004 9078 9152 9225 9299 9372 9446 9520 9593 46 333334 34 34 35 447 9667 9741 9815 9888 9962 0036 o!09 0183 0257 0330 47 33 34 34 35 35 36 448 58 0404 0478 0552 0625 0699 0773 0847 0920 0994 1068 48 31 35 35 36 36 36 449 1142 1215 1289 1363 1437 1510 1584 1658 1732 1806 49 35 35 36 36 37 37 1 2 3 4 5 6 7 8 9 7172 73 74 75 76 TABLE I. Log LogO-HO Pro. Parts. X 1 2 3 4 5 6 7 8 9 71 7S '7374 -75J76 0-450 58 1875 195c $ 2027 ' 210 217 224 232$ > 2396 > 2470 2544 50 36 36 37 37 3838 451 2616 269$ \ 2766 283 291 2987 3061 313* 3209 3283 51J363737 38 3839 452 3357 3430 3504 357 365 3726 3800 3874 < 3948 4022 52 37,37 3^ 38 39 40 453 4096 4170 4244 431 439 4466 454C ) 4614 < 4688 4761 53 38,38 3 3940 40 454 4835 4909 4983 505 513 5205 527< > 5354 5428 5502 54 38 39 3 4C 40 41 455 5576 565C 5724 579 587 5946 602C > 6094 6168 6242 3.5 39 40 4C 41 41 42 456 6316 6390 6464 653 661 6687 6761 6835 6909 6983 56404014141 42 43 457 7057 713 7205 728 735 7428 750$ ' 7576 7650 7724 5740414242 43 43 458 7799 7873 7947 802 809 8169 8244 < 8318 8392 8466 5841424$ 45 44 44 459 8540 8615 8689 8763 883 8912 8986 9060 9134 9208 59 42 42 4: 44 44 45 !-- 60 43|43|44 44 45 46 460 58 9283 9357 9431 9506 9580 9654 9728 9803 9877 9951 461 59 0025 0100 0174 0248 0323 0397 0471 0546 0620 0694 6143'444^ 45 46 46 462 0769 0843 0917 0992 1066 1140 1215 1289 1364 1438 62 44145 45<46|46 47 463 1512 1587 1661 1736 1810 1884 1959 2033 2108 2182 6345454647 4-7 48 464 2256 2331 2405 2480 2554 2629 2703 2778 2852 2926 64 45 46 47 47 4b 49 465 3001 3075 3150 3224 3299 3373 3448 3522 3597 3671 65 46 47 47 48 49 49 466 3746 3820 3895 3969 4044 4119 4193 4268 4342 4417 36 47 48 4S 4f 50 50 467 4491 4566 4640 4715 4790 4864 4939 5013 5088 5162 57 48 48 4S 50 50 5 468 5237 5312 5386 5461 5536 5610 5685 5759 5834 5909 3848 495 50 51 52 469 5983 6058 6133 6207 6282 6357 6431 6506 6581 6655 5949 50 5 51 52 52 470 59 6730 6805 6879 6954 7029 7104 7178 7253 7328 7402 7050 505 52 52 53 471 7477 7552 7627 7701 7776 7851 7926 8000 8075 8150 7150 51|5 53 53 54 472 8225 8300 8374 8449 8524 8599 8673 8748 8823 8898 7251 52 5 53 54 55 473 8973 9048 9122 9197 9272 9347 9422 9497 9571 9646 7352 53 5 5 55|55 474 9721 9796 9871 9946 0021 0096 0170 0245 0320 0395 7453 53 5 5 56 56 475 60 0470 0545 0620 0695 0770 0845 0920 0994 1069 1144 7553 54 5 5 56 57 476 1219 1294 1369 1444 1519 1594 1669 1744 1819 1894 7654 55 5 5 57 58 477 1969 2044 2119 2194 2269 2344 2419 2494 2569 2644 77 55 55 5 5 58 59 478 2719 2794 2869 2944 3019 3094 3170 3245 3320 3395 r855 56 5 5 58 59 479 3470 3545 3620 3695 3770 3845 3920 3995 4071 4146 r956 57 5 5 59 60 480 604221 4296 4371 4446 4521 4597 4672 4747 4822 4897 JO 57 58 58 5 60 61 481 4972 5047 5123 5198 5273 5348 5423 5499 5574 5649 $1585859 60 61 62 482 5724 5799 5875 5950 6025 6100 6176 6251 6326 6401 *2 58 59 60 6 6262 483 6476 6552 6627 6702 6778 6853 6928 7003 7079 7154 !3 59 60 61 6 6263 484 7229 7305 7380 7455 7530 7606 7681 7756 7832 7907 46060 61 62 63 64 485 7982 8058 8133 8208 8284 8359 8435 8510 8585 8661 5 60 61 62 5c 64 65 486 8736 8811 8887 8962 9038 9113 9188 9264 9339 9415 66162:63 j- 64 65 487 9490 9565 9641 9716 9792 9867 9943 0018 0094 0169 7|62 63 64 >^ 65 66 488 61 0244 0320 0395 0471 0546 0622 0697 0773 0848 0924 8626364 j^ 66 67 489 0999 1075 1150 1226 1301 377 1453 1528 1604 1679 9 63^4:65 66 67 58 490 61 1755 1830 1906 1981 2057 2132 2208 22841 2359 2435 64J65 66 67 68 38 491 2510 2586 2662 2737 2813 888 2964 3040 3115 3191 1 65 ee'ee T 68 39 492 3267 3342 3418 3493 3569 645 3720 3796 3872 3947 2 6566,67 8 59 70 493 4023 4099 4175 4250 4326 402 4477 4553 4629 4704 3 66:67 68 9 n 494 4780 4856 4932 5007 5083 159 5235 5310 5386 5462 46768J69 n 495 5538 5613 5689 5765 5841 916 5992 6068 6144 6220 567( )8'69 1 >2 496 6295 6371 6447 6523 6599 675 6750 6826 6902 6978 6 68 69 70 1 2 '3 497 7054 7130 7205 7281 357 433 7509 7585 7661 7737 7 69 70 71 2 374 498 7812 7888 7964 8040 8116 192 8268 8344 8420 8496 37071' ?2 3 474 499 8572 8647 8723 8799 8875 951 9027 9103 9179 9255 37071 ' i2 3 475 L 6 1 2 3 4 , 6 7 8 9 71 72 f 3 4 $ 11 TABLE I. Lo Log (1+07) Pro. Par X 1 2 3 4 5 6 7 8 9 76 77 78 0-500 0-61 9331 9407 9483 9559 9635 9711 9787 9863 9939 0015 00 501 620091 0167 0243 0319 0395 0471 0547 0623 0699 0775 01 1 1 1 502 0851 0927 1004 1080 1156 1232 1308 1384 1460 1536 02 2 2 2 503 1612 1688 1764 1840 1917 1993 2069 2145 2221 2297 03 2 2 2 504 2373 2450 2526 2602 2678 2754 2830 2906 2983 3059 04 3 3 3 505 3135 3211 3287 3364 3440 3516 3592 3668 3745 3821 05 4 4 4 506 3897 3973 4050 4126 4202 4278 4355 4431 4507 4583 06 5 5 o 507 4660 4736 4812 4888 4965 5041 5117 5194 5270 5346 07 5 5 K 508 5422 5499 5575 5651 5728 5804 5880 5957 6033 6109 08 6 6 6 509 6186 6262 6338 6415 6491 6568 6644 6720 6797 6873 09 7 7 7 510 62 6949 7026 7102 7179 7255 7331 7408 7484 7561 7637 10 8 8 8 511 7714 7790 7866 7943 8019 8096 8172 8249 8325 8402 11 8 8 8 512 8478 8555 8631 8708 8784 8861 8937 9014 9090 9167 12 9 9 9 513 9243 9320 9396 9473 9549 9626 9702 9779 9855 9932 13 10 10 10 514 63 0008 0085 0162 0238 0315 0391 0468 0544 0621 0698 14 11 11 11 515 0774 0851 0927 1004 1081 1157 1234 1311 1387 1464 15 11 12 12 516 1540 1617 1694 1770 1847 1924 2000 2077 2154 2230 16 12 12 12 517 2307 2384 2460 2537 2614 2691 2767 2844 2921 2997 17 13 13 13 518 3074 3151 3228 3304 3381 3458 3535 3611 3688 3765 18 14 14 14 519 3842 3918 3995 4072 4149 4225 4302 4379 4456 4533 19 14 15 15 520 63 4609 4686 4763 4840 4917 4993 5070 5147 5224 5301 20 15 15 16 521 5378 5454 5531 5608 5685 5762 5839 5916 5993 6069 21 16 16 16 -522 6146 6223 6300 6377 6454 6531 6608 6685 6762 6838 22 17 17 17 523 6915 6992 7069 7146 7223 7300 7377 7454 7531 7608 23 17 18 18 524 7685 7762 7839 7916 7993 8070 8147 8224 8301 8378 24 18 18 19 525 8455 8532 8609 8686 8763 8840 8917 8994 9071 9148 25 19 19 20 526 9225 9302 9379 9456 9533 9610 9687 9765 9842 9919 26 20 20 20 527 9996 0073 0150 0227 0304 0381 0458 0535 0613 0690 27 21 21 21 528 64 0767 0844 0921 0998 1075 1153 1230 1307 1384 1461 28 21 22 22 529 1538 1616 1693 1770 1847 1924 2002 2079 2156 2233 29 22 22 23 530 642310 2388 2465 2542 2619 2696 2774 2851 2928 3005 30 23 23 23 531 3083 3160 3237 3314 3392 3469 3546 3624 3701 3778 31 24 24 24 532 3855 3933 4010 4087 4165 4242 4319 4397 4474 4551 32 24 25 25 533 4629 4706 4783 4861 4938 5015 5093 5170 5247 5325 33 25 25 26 534 5402 5479 5557 5634 5712 5789 5866 5944 6021 6099 34 26 26 27 535 6176 6253 6331 6408 6486 6563 6641 6718 6795 6873 35 27 27 27 536 6950 7028 7105 7183 7260 7338 7415 7493 7570 7648 36 27 28 28 537 7725 7803 7880 7958 8035 8113 8190 8268 8345 8423 37 28 28 29 538 8500 8578 8655 8733 8810 8888 8966 9043 9121 9198 38 29 29 30 539 9276 9353 9431 9509 9586 9664 9741 9819 9897 9974 39 30 30 30 540 65 0052 0129 0207 0285 0362 0440 0518 0595 0673 0750 40 30 31 31 541 0828 0906 0983 1061 1139 1216 1294 1372 1450 1527 41131 32 32 542 1605 1683 1760 1838 1916 1993 2071 2149 2227 2304 4232 32 33 543 2382 2460 2538 2615 2693 2771 2849 2926 3004 3082 4333 33 34 544 3160 3237 3315 3393 3471 3549 3626 3704 3782 3860 4433 34 34 545 3938 4015 4093 4171 4249 4327 4405 4482 4560 4638 453435 35 548 4716 4794 4872 4949 5027 5105 5183 5261 5339 5417 463535 36 547 5495 5573 5650 5728 5806 5884 5962 6040 6118 6196 47 36 36 37 548 6274 6352 6430 6508 6586 6663 6741 6819 6897 6975 483637 37 549 7053 7131 7209 7287 7365 7443 7521 7599 7677 7755 493738 38 1 2 3 4 5 6 7 8 9 76 77 78 12 TABLE I. I Lo^ ^^^^^^^^^I^^H Log (1+s) m^*mmm^mnr*maa*~' Pro. Parts. * 1 2 3 4 5 6 7 8 9 76 77 78 79 80 IO-550 0-65 7833 7911 7989 8067 8145 8223 8301 8379 8457 8536 50 38 39 39 40 40 1 '551 8614 8692 8770 8848 8926 9004 9082 9160 9238 9326 51 39 39 40 40 41 1 '552 9394 9472 9550 9629 9707 9785 9863 9941 0019 0097 52 40 40 41 41 42 1 '553 66 0175 0254 0332 0410 0488 0566 0644 0722 0801 0879 53 40 41 41 42 42 1 '554 0957 1035 1113 1191 1270 1348 1426 1504 1582 1661 54 41 42 42 43 43 1 '555 1739 1817 1895 1973 2052 2130 2208 2286 2365 2443 55 42 42 43 43 44 1 '556 2521 2599 2678 2756 2834 2912 2991 3069 3147 3226 56 43 43 44 44 45 1 '557 3304 3382 3460 3539 3617 3695 3774 3852 3930 4009 57 43 44 44 45 46 1 '558 4087 4165 4244 4322 4400 4479 4557 4635 4714 4792 58 44 45 45 46 46 1 '559 4870 4949 5027 5105 5184 5262 5341 5419 5497 5576 59 45 45 46 47 47 1 -560 66 5654 5733 5811 5889 5968 6046 6125 6203 6282 6360 60 46 46 47 47 48 1 -561 6438 6517 6595 6674 6752 6831 6909 6988 7066 7145 61 46 47 48 48 49 1 -562 7223 7302 7380 7459 7537 7616 7694 7773 7851 7930 62 47 48 48 49 50 1 -563 8008 8087 8165 8244 8322 8401 8479 8558 8636 8715 63 48 49 49 50 50 564 8794 8872 8951 9029 9108 9186 9265 9344 9422 9501 64 49 49 50 51 51 565 9579 9658 9737 9815 9894 9972 0051 0130 0208 0287 65 49 50 51 51 52 1 -566 67 0366 0444 0523 0601 0680 0759 0837 0916 0995 1073 66 50 51 51 52 53 567 1152 1231 1309 1388 1467 1546 1624 1703 1782 1860 67 51 52 52 53 54 1 '568 1939 2018 2097 2175 2254 2333 2411 2490 2569 2648 68 52 52 53 54 54 569 2726 2805 2884 2963 3041 3120 3199 3278 3357 3435 69 52 53 54 55 55 570 67 3514 3593 3672 3751 3829 3908 3987 4066 4145 4223 70 53 54 55 55 56 571 4302 4381 4460 4539 4618 4696 4775 4854 4933 5012 71 54 55 55 56 57 572 5091 5170 5249 5327 5406 5485 5564 5643 5722 5801 72 55 55 56 57 58 573 5880 5959 6037 6116 6195 6274 6353 6432 6511 6590 73 55 56 57 58 58 574 6669 6748 6827! 6906 6985 7064 7143 7222 7301 7380 74 56 57 58 58 59 575 7459 7538 7617 7696 7775 7854 7933 8012 8091 8170 75 57 58 58 59 60 576 8249 8328 8407 8486 8565 8644 8723 8802 8881 8960 76 58 59 59 60 61 577 9039 9118 9197 9276 9355 9434 9513 9593 9672 9751 77 59 59 60 61 62 578 9830 9909 9988 0067 0146 0225 0304 0384 0463 0542 78 59 60 61 62 62 579 68 0621 0700 0779 0858 0938 1017 1096 1175 1254 1333 79 60 61 62 62 63 580 68 1413 1492 1571 1650 1729 1808 1888 1967 2046 2125 80 61 62 62 63 64 581 2205 2284 2363 2442 2521 2601 2680 2759 2838 2918 81 62 62 63 64 65 1 '582 2997 3076 3155 3235 3314 3393 3472 3552 3631 3710 82 62 63 64 65 66 583 3790 3869 3948 4027 4107 4186 4265 4345 4424 4503 83 63 64 65 66 66 584 4583 4662 4741 4821 4900 4979 5059 5138 5217 5297 84 64 65 66 66 67 585 5376 5455 5535 5614 5694 5773 5852 5932 6011 6090 85 65 65 66 67 68 586 6170 6250 6329 6408 6488 6567 6646 6726 6805 6885 86 65 66 67 68 69 587 6964 7044 7123 7202 7282 7361 7441 7520 7600 7679 87 66 67 68 69 70 588 7759 7838 7918 7997 8077 8156 8236 8315 8395 8474 88 67 68 69 70 70 589 8554 8633 8713 8792 8872 8951 9031 9110 9190 9269 89 68 69 69 70 71 590 68 9349 9429 9508 9588 9667 9747 9826 9906 9985 0065 90 6869 70 71 72 591 690145 0224 0304 0383 0463 0543 0622 0702 0781 0861 91 6970 71 72 73 592 0941 1020 1100 1180 1259 1339 1419 1498 1578 1658 92 70 71 72 73 74 593 1737 1817 1897 1976 2056 2136 2215 2295 2375 2454 93 71 72 73 73 74 594 2534 2614 2693 2773 2853 2933 3012 3092 3172 3251 94 71 72 73 74 75 1 -595 3331 3411 3491 3570 3650 3730 3810 3889 3969 4049 95 72 73 74 75 76 1 '596 4129 4209 4288 4368 4448 4528 4fiOft 4687 47fi7 4847 96 73 74 75 76 77 1 -597 4927 5007 5086 5166 5246 5326 5406 5486 T I U i 5565 TFOT l 5645 97 74 75 76 77 78 1 -598 5725 5805 5885 5965 6044 6124 6204 6284 6364 6444 98 74 75 76 77 78 1 -599 6524 6604 6684 6763 6843 6923 7003 7083 7163 7243 99 75 76 77 78 79 1 2 3 4 5 6 7 8 9 76 77 78 79 90 13 TABLE I. Log(l+*) Pro. Parts. Log X 1 2 3 4 5 6 7 8 9 8( 81 82 8384 0600 0-69 7323 7403 7483 7563 7643 7722 7802 7882 7962 8042 00 601 812218202 8282 8362 8442 8522 8602 8682 8762 8842 01 1 1 1 1 1 602 8922 9002 9082 9162 9242 9322 9402 9482 9562 9642 02 2 2 2 2 2 603 9722 9802 9882 9962 0042 0122 0202 0283 0363 0443 03 2 2 2 2 : 604 700523 0603 0683 0763 0843 0923 1003 1083 1163 1243 04 3 3 3 c 605 1324 1404 1484 1564 1644 1724 1804 1884 1965 2045 05 4 4 4 4 4 606 2125 2205 2285 2365 2445 2526 2606 2686 2766 2846 06 i 5 K 5 5 607 2926 3007 3087 3167 3247 3327 3408 3488 3568 3648 07 ( 6 6 6 6 608 3728 3809 3889 3969 4049 4130 4210 4290 4370 4451 08 ( 6 7 7 7 609 4531 4611 4691 4772 4852 4932 5012 5093 5173 5253 09 7 7 i 7 8 610 70 5334 5414 5494 5574 5655 5735 5815 5896 5976 6056 10 8 8 8 8 8 611 6137 6217 6297 6378 6458 6538 6619 6699 6779 6860 11 9 9 f 9 < 612 6940 7020 7101 7181 7262 7342 7422 7503 7583 7664 12 10 10 10 10 10 613 7744 7824 7905 7985 8066 8146 8226 8307 8387 8468 13 10 11 11 11 i 614 8548 8629 8709 8789 8870 8950 9031 9111 9192 9272 14 11 11 11 12 2 615 9353 9433 9514 9594 9675 9755 9836 9916 9997 0077 15 g 12 12 12 ;$ 616 710158 0238 0319 0399 0480 0560 0641 0721 0802 0882 U 13 13 13 j 617 0963 1043 1124 1204 1285 1366 1446 1527 1607 1688 17 i 14 14 14 i i 1 618 1768 1849 1930 2010 2091 2171 2252 2333 2413 2494 18 i 15 15 15 15 619 2574 2655 2736 2816 2897 2978 3058 3139 3220 3300 If t 15 16 16 16 620 71 3381 3461 3542 3623 3703 3784 3865 3945 4026 4107 20 16 16 16 17 17 621 4188 4268 4349 4430 4510 4591 4672 4752 4833 4914 21 17 17 17 17 18 622 4995 5075 5156 5237 5318 5398 5479 5560 5640 5721 22 18 18 18 18 18 623 5802 5883 5964 6044 6125 6206 6287 6367 6448 6529 23 18 If) If 19 19 624 6610 6691 6771 6852 6933 7014 7095 7175 7256 7337 24 19 19 20 20 20 625 7418 7499 7580 7660 7741 7822 7903 7984 8065 8146 25 20 20 21 '21 21 626 8226 8307 8388 8469 8550 8631 8712 8793 8873 8954 26 21 21 21 22 22 627 9035 9116 9197 9278 9359 9440 9521 9602 9683 9764 2? 22 2222 2223 628 9844 9925 0006 0087 o!68 0249 0330 0411 0492 0573 28 22 23 23 2324 629 72 0654 0735 0816 0897 0978 1059 1140 1221 1302 1383 29 23 23 24 24 24 630 72 1464 1545 1626 1707 1788 1869 1950 2031 2112 2193 30 24 2425 25 25 631 2274 2355 2436 2517 2598 2680 2761 2842 2923 3004 31 25 2525 26:26 632 3085 3166 3247 3328 3409 3490 3571 3653 3734 3815 32 26 2626 27 27 633 3896 3977 4058 4139 4220 4301 4383 4464 4545 4626 33 26 27:27 27 28 634 4707 4788 4869 4951 5032 5113 5194 5275 5356 5438 34 27 28(28 28 29 635 5519 5600 5681 5762 5844 5925 6006 6087 6168 6250 35 28 2829 29 29 636 6331 6412 6493 6575 6656 6737 6818 6900 6981 7062 36 29 29 30 30 30 637 7143 7225 7306 7387 7468 7550 7631 7712 7793 7875 37 30 3030 31 31 638 7956 8037 8119 8200 8281 8363 8444 8525 8606 8688 38 30 3131 32J32 639 8769 8850 8932 9013 9094 9176 9257 9338 9420 9501 39 31 32 32 32J33 640 72 9583 9664 9745 9827 9908 9989 0071 0152 0234 0315 40 32 32 33 33 34 641 73 0396 0478 0559 0641 0722 0803 0885 0966 1048 1129 41 33 33 34 34 34 642 1210 1292 1373 1455 1536 1618 1699 1781 1862 1943 42 34 343435 35 643 2025 2106 2188 2269 2351 2432 2514 2595 2677 2758 43 34 3535 36 36 644 2840 2921 3003 3084 3166 3247 3329 3410 3492 3573 44 35 36 36 37 37 645 3655 3736 3818 3900 3981 4063 4144 4226 4307 4389 45 36 36 37 37 38 646 4470 4552 4634 4715 4797 4878 4960 5042 5123 5205 46 37 37 38 38 39 647 5286 5368 5450 5531 5613 5694 5776 5858 5939 6021 47 38 38 39 39 39 648 6103 6184 6266 6348 6429 6511 6592 6674 6756 6837 48 38 3939 40 40 649 6919 7001 7082 7164 7246 7328 7409 7491 7573 7654 49 39 40 10 41 41 1 2 3 4 5 6 7 8 9 ^0 81 S2 S3 34 14 TABLE I. Log Log(l+*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 80 81 82 83 84 0-650 0-73 7736 7818 7899 7981 8063 8145 8226 8308 8390 8472 50 40 41 41 42 42 651 8553 8635 8717 8799 8880 8962 9044 9126 9207 9289 51 41 41 42 42 43 652 9371 9453 9534 9616 9698 9780 9862 9943 0025 0107 52 42 42 43 43 44 653 740189 0271 0352 0434 0516 0598 0680 0762 0843 0925 53 42 43 43 44 45 654 1007 1089 1171 1253 1335 1416 1498 1580 1662 1744 54 43 44 44 45 45 655 1826 1908 1989 2071 2153 2235 2317 2399 2481 2563 55 44 45 45 46 46 656 2645 2727 2809 2890 2972 3054 3136 3218 3300 3382 56 45 45 46 46 47 657 3464 3546 3628 3710 3792 3874 3956 4038 4120 4202 57 46 46 4" 47 48 .fiKQ 49ft4 4Sfifi 444ft 4^0 4fil9 4fiQ<: 14,77ft 40 eo 4.OJ.I KAgo ~<_ 4r 4? 4ft 4ft 40 DOO 659 T?4t5l 5104 T?OOv 5186 TTTO 5268 TOOL 5350 i*\j 1 5432 T?Oc/ . 5514 ~t 1 1 O 5596 TOOC 5678 ty'tf 5760 50 660 74 5924 6006 6088 6170 6252 6334 6416 6498 6580 6663 60 48 49 49 50 50 661 6745 6827 6909 6991 7073 7155 7237 7319 7401 7484 6] 49 49 50 5] 51 662 7566 7648 7730 7812 7894 7976 8058 8141 8223 8305 62 50 50 51 51 52 663 8387 8469 8551 8633 8716 8798 8880 8962 9044 9126 63 50 51 52 52 53 664 9209 9291 9373 9455 9537 9620 9702 9784 9866 9948 64 5] 52 52 53 54 665 75 0031 0113 0195 0277 0360 0442 0524 0606 0689 0771 65 52 53 53 54 55 666 0853 0935 1018 1100 1182 1264 1347 1429 1511 1593 66 53 53 54 55 55 667 1676 1758 1840 1923 2005 2087 2169 2252 2334 2416 67 o-J 54 55 56 56 668 2499 2581 2663 2746 2828 2910 2993 3075 3157 3240 68 5-J 55 56 56 57 669 3322 3404 3487 3569 3652 3734 3816 3899 3981 4063 69 55 56 57 57 58 670 754146 4228 4311 4393 4475 4558 4640 4723 4805 4887 70 56 57 57 58 59 671 4970 5052 5135 5217 5300 5382 5464 5547 5629 5712 71 57 58 58 59 60 672 5794 5877 5959 6042 6124 6206 6289 6371 6454 6536 72 58 58 59 60 60 673 6619 6701 6784 6866 6949 7031 7114 7196 7279 7361 73 58 59 60 61 61 674 7444 7526 7609 7691 7774 7857 7939 8022 8104 8187 74 59 60 61 61 62 675 8269 8352 8434 8517 8599 8682 8765 8847 8930 9012 75 60 61 61 62 63 676 9095 9178 9260 9343 9425 9508 9591 9673 9756 9838 76 61 62 62 63 64 677 9921 0004 0086 0169 0251 0334 0417 0499 0582 0665 77 62 62 63 64 65 678 76 0747 0830 0913 0995 1078 1161 1243 1326 1409 1491 78 62 63 64 65 66 679 1574 1657 1739 1822 1905 1987 2070 2153 2236 2318 79 63 64 65 66 66 680 762401 2484 2566 2649 2732 2815 2897 2980 3063 3146 80 64 65 66 66 67 681 3228 3311 3394 3477 3559 3642 3725 3808 3890 3973 81 65 66 66 >7 68 682 4056 4139 4222 4304 4387 4470 4553 4636 4718 4801 82 66 66 67 68 69 683 4884 4967 5050 5132 5215 5298 5381 5464 5547 5630 83 66 67 68 69 70 684 5712 5795 5878 5961 6044 6127 6210 6292 6375 6458 84 )7 68 69 70 71 685 6541 6624 6707 6790 6873 6955 7038 7121 7204 7287 85 68 69 70 71 71 686 7370 7453 7536 7619 7702 7785 7868 7950 8033 8116 86 69 70 71 71 72 687 8199 8282 8365 8448 8531 8614 8697 8780 8863 8946 87 70 70 71 72 73 688 9029 9112 9195 9278 9361 9444 9527 9610 9693 9776 88 70 71 72 73 74 689 9859 9942 0025 0108 0191 0274 0357 0440 0523 0606 89 71 72 73 74 75 690 77 0689 0772 0855 0938 1021 1104 1187 1271 1354 1437 90 72 73 74 75 76 691 1520 1603 1686 1769 1852 1935 2018 2101 2184 2268 91 73 74 75 76 76 692 2351 2434 2517 2600 2683 2766 2849 2933 3016 3099 92 74 75 75 76 77 693 3182 3265 3348 3431 3515 3598 3681 3764 3847 3930 93 74 75 76 77 78 694 4014 4097 4180 4263 4346 4429 4513 4596 4679 4762 94 75 76 77 78 79 695 4845 4929 5012 5095 5178 5262 5345 5428 5511 5594 95 '6 77 78 79 SO 696 5678 5761 5844 5927 6011 6094 6177 6260 6344 6427 96 77 78 79 80 SI 697 6510 6593 6677 6760 6843 6927 7010 7093 7176 7260 97 "8 79 80 81 31 698 7343 7426 7510 7593 7676 7760 7843 7926 8010 8093 98 "8 79 80 81 32 699 8176 8260 8343 8426 8510 8593 8676 8760 8843 8926 99 79 80 81 32 33 1 2 3 4 5 6 7 8 9 30 SI 32 33 34 15 TABLE I. Log(l+*) Pro. Parts. Log X 1 2 3 4 5 6 7 8 9 8384 85'86 87 0-700 0-77 9010 9093 9176 9260 9343 9427 9510 9593 9677 9760 00 701 9844 9927 0010 0094 0177 0261 0344 0427 0511 0594 01 1 1 1 1 1 702 78 0678 0761 0845 0928 1011 1095 1178 1262 1345 1429 02 2 2 2 2 2 703 1512 1596 1679 1763 1846 1930 2013 2096 2180 2263 03 2 3 3 3 3 704 2347 2430 2514 2597 2681 2764 2848 2931 3015 3099 04 3 3 3 3 3 705 3182 3266 3349 3433 3516 3600 3683 3767 3850 3934 05 4 4 *N 4 706 4017 4101 4185 4268 4352 4435 4519 4602 4686 4770 06 5 5 5 5 5 707 4853 4937 5020 5104 5188 5271 5355 5438 5522 5606 07 6 6 6 6 6 708 5689 5773 5856 5940 6024 6107 6191 6275 6358 6442 08 7 7 7 7 7 709 6526 6609 6693 6777 6860 6944 7028 7111 7195 7279 09 7 8 8 8 8 710 78 7362 7446 7530 7613 7697 7781 7864 7948 8032 8116 10 8 8 9 9 9 711 8199 8283 8367 8450 8534 8618 8702 8785 8869 8953 11 9 9 9 9 10 712 9037 9120 9204 9288 9372 9455 9539 9623 9707 9790 12 10 10 10 10 10 713 9874 9958 0042 0126 0209 0293 0377 o461 0544 0628 13 11 N 11 11 11 714 790712 0796 0880 0964 1047 1131 1215 1299 1383 1466 14 12 12 12 12 12 715 1550 1634 1718 1802 1886 1970 2053 2137 2221 2305 15 12 13 13 13 13 716 2389 2473 2557 2641 2724 2808 2892 2976 3060 3144 16 13 13 14 14 14 717 3228 3312 3396 3479 3563 3647 3731 3815 3899 3983 17 14 14 14 15 15 718 4067 4151 4235 4319 4403 4487 4571 4655 4738 4822 18 15 15 15 15 16 719 4906 4990 5074 5158 5242 5326 5410 5494 5578 5662 19 16 16 16 16 17 720 79 5746 5830 5914 5998 6082 6166 6250 6334 6418 6502 20 17 17 17 17 17 721 6586 6670 6754 6838 6922 7006 7091 7175 7259 7343 21 17 18 1818 18 722 7427 7511 7595 7679 7763 7847 7931 8015 8099 8183 22 18 18 19|19 19 723 8267 8352 8436 8520 8604 8688 8772 8856 8940 9024 23 19 19 20 20 20 724 9108 9193 9277 9361 9445 9529 9613 9697 9782 9866 24 80 20 20 21 21 725 9950 0034 0118 0202 0286 0371 0455 0539 0623 o707 25 21 21 21 22 22 726 80 0791 0876 0960 104* 1128 1212 1297 1381 1465 1549 86 22 22 22 22 23 727 1633 1718 1802 1886 1970 2055 2139 2223 2307 2391 27 22 23 23 23 23 728 2476 2560 2644 2728 2813 2897 2981 3065 3150 3234 88 23 24 24 24 24 729 3318 3403 3487 3571 3655 3740 3824 3908 3993 4077 89 24 24 2525 25 730 804161 4245 4330 4414 4498 4583 4667 4751 4836 4920 30 25 25 2526 26 731 5004 5089 5173 5257 5342 5426 5510 5595 5679 5763 31 26 26 2627 27 732 5848 5932 6016 6101 6185 6270 6354 6438 6523 6607 32 27 27 27;28 28 733 6692 6776 6860 6945 7029 7114 7198 7282 7367 7451 33 27 28 28128 29 734 7536 7620 7704 7789 7873 7958 8042 8127 8211 8296 34 28 29 29 29 30 735 8380 8464 8549 8633 8718 8802 8887 8971 9056 9140 35 29 29 30 30 30 736 9225 9309 9394 9478 9563 9647 9732 9816 9901 9985 3630 30 3131 31 737 81 0070 0154 0239 0323 0408 0492 0577 0661 0746 0830 3731 313l|32 738 0915 1000 1084 1169 1253 1338 1422 1507 1591 1676 38J32 32 32 33 33 739 740 1761 1845 1930 2014 2099 2184 2268 2353 2437 2522 39 32 33 33,33 34134 .-* 34 81 2606 2691 2776 2860 2945 3030 3114 3199 3283 3368 40 : 35 741 3453 3537 3622 3707 3791 3876 3961 4045 4130 4215 4134 34 35 35 36 742 4299 4384 4469 4553 4638 4723 4807 4892 4977 5061 42 ! 35 35 36 36 37 743 5146 5231 5315 5400 5485 5569 5654 5739 5824 5908 4336 36 37)3737 744 5993 6078 6163 6247 6332 6417 6501 6586 6671 6756 4437 37 37 38(38 745 6840 6925 7010 7095 7179 7264 7349 7434 7519 7603 4537 38 38 39 39 746 7688 7773 7858 7943 8027 8112 8197 8282 8367 8451 4638 39 39140 40 747 8536 8621 8706 8791 8875 8960 9045 9130 9215 9300 47 39 394040 41 748 9384 9469 9554 9639 9724 9809 9894 9978 0063 0148 48 40 4041 41 42 749 82 0233 0318 0403 0488 0572 0657 0742 0827 0912 0997 49 41 41 42 42 43 1 2 3 4 5 6 7 8 9 83 84 8586 87 10 TABLE I. 1, Log(l+#) Pro. Parts. Log X 1 2 3 4 5 6 7 8 9 83 84|85 se 87 JO-750 0'82 1082 1167 1252 1337 1421 1506 1591 1676 1761 1846 50 42 42 43 43 44 || '751 1931 2016 2101 2186 2271 2356 2441 2526 2611 2696 51 42 43 43 44 44 1 -752 2780 2865 2950 3035 3120 3205 3290 3375 3460 3545 52 43 44 44 45 45 I '753 3630 3715 3800 3885 3970 4055 4140 4225 4310 4395 53 44 45 45 46J46 1 '754 4480 4565 4650 4735 4820 4905 4990 5076 5161 5246 54 45 45 46 46 47 1 ' 755 5331 5416 5501 5586 5671 5756 5841 5926 6011 6096 55 46 46 47 47 48 1 -756 6181 6266 6351 6437 6522 6607 6692 6777 6862 6947 56 46 47 48 48 49 1 '757 7032 7117 7202 7288 7373 7458 7543 7628 7713 7798 57 47 48|48 49 50 1 -758 7883 7969 8054 8139 8224 8309 8394 8479 8565 8650 58 48 49 49 50 50 1 ' 759 8735 8820 8905 8990 9076 9161 9246 9331 9416 9502 59 49 50 50 51 51 1 -760 82 9587 9672 9757 9842 9928 0013 0098 0183 0268 0354 60 50 50 51 52 52 1 -761 83 0439 0524 0609 0695 0780 0865 0950 1035 1121 1206 61 51 51 52 52 53 1 -762 1291 1376 1462 1547 1632 1718 1803 1888 1973 2059 62 51 52 53 53 54 1 -763 2144 2229 2314 2400 2485 2570 2656 2741 2826 2912 63 52 53 54 54 55 1 -764 2997 3082 3167 3253 3338 3423 3509 3594 3679 3765 64 53 54 54 55 56 1 -765 3850 3935 4021 4106 4191 4277 4362 4448 4533 4618 65 54 55 55 56 57 1 -766 4704 4789 4874 4960 5045 5131 5216 5301 5387 5472 66 55 55 56 57 57 1 -767 5557 5643 5728 5814 5899 5984 6070 6155 6241 6326 67 56 56 57 58 58 1 -768 6412 6497 6582 6668 6753 6839 6924 7010 7095 7181 68 56 57 58 58 59 1 -769 7266 7351 7437 7522 7608 7693 7779 7864 7950 8035 69 57 58 59 59 60 1 -770 838121 8206 8292 8377 8463 8548 8634 8719 8805 8890 70 58 59 59 60 61 1 -771 8976 9061 9147 9232 9318 9403 9489 9574 9660 9745 71 59 60 60 61 62 1 -772 9831 9916 0002 0088 0173 0259 0344 0430 0515 0601 72 60 60 61 62 63 1 -773 84 0686 0772 0858 0943 1029 1114 1200 1285 1371 1457 73 j 1 61 62 63 64 1 -774 1542 1628 1713 1799 1885 1970 2056 2142 2227 2313 74 61 62 63 64 64 775 2398 2484 2570 2655 2741 2827 2912 2998 3083 3169 75 62 63 64 64 65 776 3255 3340 3426 3512 3597 3683 3769 3854 3940 4026 76 63 64 65 65 66 1 -777 4111 4197 4283 4368 4454 4540 4626 4711 4797 4883 77 64 65 65 66 67 1 -778 4968 5054 5140 5226 5311 5397 5483 5568 5654 5740 78 65 66 66 67 68 I -779 5826 5911 5997 6083 6169 6254 6340 6426 6512 6597 79 66 66 67 68 69 1 -780 84 6683 6769 6855 6940 7026 7112 7198 7284 7369 7455 80 66 67 68 69 70 1 -781 7541 7627 7713 7798 7884 7970 8056 8142 8227 8313 81 67 68 69 70 70 1 '782 8399 8485 8571 8657 8742 8828 8914 9000 9086 9172 82 68 69 70 71 71 1 -783 9257 9343 9429 9515 9601 9687 9773 9858 9944 0030 83 69 70 71 71 72 784 850116 0202 0288 0374 0460 0545 0631 0717 0803 0889 84 70 71 71 72 73 785 0975 1061 1147 1233 1319 1405 1490 1576 1662 1748 85 71 71 72 73 74 786 1834 1920 2006 2092 2178 2264 2350 2436 2522 2608 86 71 72 73 74 75 787 2694 2780 2866 2952 3038 3124 3209 3295 3381 3467 87 72 73 74 75 76 1 -788 3553 3639 3725 3811 3897 3983 4069 4155 4241 4327 88 73 74 75 76 77 I -789 4413 4499 4586 4672 4758 4844 4930 5016 5102 5188 89 74 75 76 77 77 1 -790 85 5274 5360 5446 5532 5618 5704 5790 5876 5962 6048 90 75 76 77 77 78 791 6134 6220 6307 6393 6479 6565 6651 6737 6823 6909 91 76 76 77 78 79 792 6995 7081 7167 7254 7340 7426 7512 7598 7684 7770 92 "6 77 78 79 80 793 78561 7942 8029 8115 8201 8287 8373 8459 8545 8632 93 ~7 78 79 80 81 794 8718 8804 8890 8976 9062 9149 9235 9321 9407 9493 94 78 79 80 81 82 795 9579 9666 9752 9838 9924 0010 0097 0183 0269 0355 95 /9 80 81 82 83 796 86 0441 0528 0614 0700 0786 0873 0959 1045 1131 1217 96 30 8182 S3 84 797 1304 1390 1476 1562 1649 1735 1821 1907 1994 2080 97 31 8182 33 84 798 2166 2252 2339 2425 2511 2598 2684 2770 2856 2943 98 31 8283 34 85 1 -799 3029 3115 3202 3288 3374 3460 3547 3633 3719 3806 99 32 83 34 35 86 t 1 2 3 4 5 6 7 8 9 33 84 85 36 S7 17 TABLE I. Log Log(l+a) Pro. Parts X 1 2 3 4 5 6 7 8 9 86 87 88 0-800 0-86 3892 3978 4065 4151 4237 4324 4410 4496 4583 4669 00 801 4755 4842 4928 5014 5101 5187 5273 5360 5446 5533 01 1 1 1 802 5619 5705 5792 5878 5964 6051 6137 6224 6310 6396 02 2 2 2 803 6483 6569 6656 6742 6828 6915 7001 7088 7174 7261 03 3 3 3 804 7347 7433 7520 7606 7693 7779 7866 7952 8038 8125 04 3 3 4 805 8211 8298 8384 8471 8557 8644 8730 8817 8903 8990 05 4 4 4 806 9076 9163 9249 9336 9422 9509 9595 9682 9768 9855 06 5 5 5 807 9941 0028 0114 0201 0287 0374 0460 0547 0633 0720 07 6 6 6 808 87 0806 0893 0979 1066 1152 1239 1326 1412 1499 1585 08 7 7 7 809 1672 1758 1845 1931 2018 2105 2191 2278 2364 2451 09 8 8 8 810 87 2537 2624 2711 2797 2884 2970 3057 3144 3230 3317 10 9 9 9 811 3404 3490 3577 3663 3750 3837 3923 4010 4097 4183 11 9 10 10 812 4270 4356 4443 4530 4616 4703 4790 4876 4963 5050 12 10 10 11 813 5136 5223 5310 5396 5483 5570 5656 5743 5830 5916 13 11 11 11 814 6003 6090 6177 6263 6350 6437 6523 6610 6697 6784 14 12 12 12 815 6870 6957 7044 7130 7217 7304 7391 7477 7564 7651 15 13 13 13 816 7738 7824 7911 7998 8085 8171 8258 8345 8432 8518 16 14 14 14 817 8605 8692 8779 8866 8952 9039 9126 9213 9300 9386 17 15 15 15 818 9473 9560 9647 9734 9820 9907 9994 0081 o!68 0254 18 15 16 16 819 88 0341 0428 0515 0602 0689 0775 0862 0949 1036 1123 19 16 17 17 820 88 1210 1297 1383 1470 1557 1644 1731 1818 1905 1991 20 17 17 18 821 2078 2165 2252 2339 2426 2513 2600 2687 2773 2860 21 18 18 18 822 2947 3034 3121 3208 3295 3382 3469 3556 3643 3730 22 19 19 19 823 3816 3903 3990 4077 4164 4251 4338 4425 4512 4599 23 20 20 20 824 4686 4773 4860 4947 5034 5121 5208 5295 5382 5469 24 21 21 21 825 5556 5643 5730 5817 5904 5991 6078 6165 6252 6339 25 22 22 22 826 6426 6513 6600 6687 6774 6861 6948 7035 7122 7209 26 22 23 23 827 7296 7383 7470 7557 7644 7731 7818 7905 7992 8079 27 23 23 24 828 8166 8253 8341 8428 8515 8602 8689 8776 8863 8950 28 24 24 25 829 9037 9124 9211 9298 9386 9473 9560 9647 9734 9821 29 25 25 26 830 88 9908 9995 0082 0170 0257 0344 0431 0518 0605 0692 30 26 26 26 831 89 0779 0867 0954 1041 1128 1215 1302 1389 1477 1564 31 27 27 27 832 1651 1738 1825 1912 2000 2087 2174 2261 2348 2436 32 28 28 28 833 2523 2610 2697 2784 2872 2959 3046 3133 3220 3308 33 -28 29 29 834 3395 3482 3569 3656 3744 3831 3918 4005 4093 4180 34 29 30 30 835 4267 4354 4442 4529 4616 4703 4790 4878 4965 5052 35 30 30 31 836 5140 5227 5314 5401 5489 5576 5663 5751 5838 5925 36 31 31 32 837 6012 6100 6187 6274 6362 6449 6536 6624 6711 6798 37 3-2 32 33 838 6886 6973 7060 7148 7235 7322 7410 7497 7584 7672 38 .33 33 33 839 7759 7846 7934 8021 8108 8196 8283 8370 8458 8545 39 34 34 34 840 898632 8720 8807 8895 8982 9069 9157 9244 9332 9419 40 34 35 35 841 9506 9594 9681 9769 9856 9943 0031 0118 0206 0293 41 35 36 36 842 90 0380 0468 0555 0643 0730 0818 0905 0992 1080 1167 42 36 37 37 843 1255 1342 1430 1517 1605 1692 1779 1867 1954 2042 43 37 37 38 844 2129 2217 2304 2392 2479 2567 2654 2742 2829 2917 44 38 38 39 845 3004 3092 3179 3267 3354 3442 3529 3617 3704 3792 45 39 39 40 846 3879 3967 4054 4142 4229 4317 4404 4492 4580 4667 46 40 40 40 847 4755 4842 4930 5017 5105 5192 5280 5368 5455 5543 4? 40 41 41 848 5630 5718 5805 5893 5981 6068 6156 6243 6331 6419 48 41 42 42 849 6506 6594 6681 6769 6857 6944 7032 7119 7207 7295 49 42 43 43 1 2 3 4 5 6 7 8 9 86 87 88 18 TABLE I. Log Log(l+aO Pro. Parts. X 1 2 3 4 5 6 7 8 9 86 87 88 89 0-850 D'QO 7382 7470 7557 7645 77QQ 7820 7QOft 7QQfi QHQQ 8171 50 4Q 1 1 11 45 851 \J *7\J i OO*& 8259 1 TT I L 8346 1 tyJ 1 8434 t UTJ 8522 * 1 OO 8609 1 OU 8697 I I/UO 8785 * 7t7\j 8872 ouoo 8960 1 * 1 9048 ou 51 T3 44 T?TC 44 TT 45 *rO 45 852 9135 9223 9311 9398 9486 9574 9661 9749 9837 9924 52 45 45 46 46 853 91 0012 0100 0187 0275 0363 0451 0538 0626 0714 0801 53 46 46 47 47 854 0889 0977 1065 1152 1240 1328 1416 1503 1591 1679 54 46 47 48 48 855 1766 1854 1942 2030 2117 2205 2293 2381 2469 2556 55 47 48 48 49 856 2644 2732 2820 2907 2995 3083 3171 3259 3346 3434 56 48 49 49 50 857 3522 3610 3698 3785 3873 3961 4049 4137 4224 4312 57 49 50 50 51 858 4400 4488 4576 4663 4751 4839 4927 5015 5103 5190 58 50 50 51 52 859 5278 5366 5454 5542 5630 5718 5805 5893 5981 6069 59 51 51 52 53 860 91 6157 6245 6333 6421 6508 6596 6684 6772 6860 6948 60 52 52 53 53 861 7036 7124 7212 7299 7387 7475 7563 7651 7739 7827 61 52 53 54 54 862 7915 8003 8091 8179 8267 8354 8442 8530 8618 8706 62 53 54 55 55 863 8794 8882 8970 9058 9146 9234 9322 9410 9498 9586 63 54 55 55 56 864 9674 9762 9850 9938 0026 0114 0202 0290 0378 0466 64 55 56 56 57 865 92 0554 0642 0730 0817 0906 0994 1082 1170 1258 1346 65 56 57 57 58 866 1434 1522 1610 1698 1786 1874 1962 2050 2138 2226 66 57 57 58 59 867 2314 2402 2490 2578 2666 2754 2842 2930 3018 3106 67 58 58 59 60 868 3194 3282 3371 3459 3547 3635 3723 3811 3899 3987 68 58 59 60 61 869 4075 4163 4251 4339 4428 4516 4604 4692 4780 4868 69 59 60 61 61 870 92 4956 5044 5132 5221 5309 5397 5485 5573 5661 5749 70 60 61 62 62 871 5837 5926 6014 6102 6190 6278 6366 6454 6543 6631 71 61 62 62 63 872 6719 6807 6895 6983 7072 7160 7248 7336 7424 7512 72 62 63 63 64 873 7601 7689 7777 7865 7953 8042 8130 8218 8306 8394 73 63 64 64 65 874 8483 8571 8659 8747 8836 8924 9012 9100 9188 9277 74 64 64 65 66 875 9365 9453 9541 9630 9718 9806 9894 9983 0071 0159 75 64 65 66 67 876 93 0247 0336 0424 0512 0600 0689 0777 0865 0953 1042 76 65 66 67 68 877 1130 1218 1307 1395 1483 1571 1660 1748 1836 1925 77 66 67 68 69 878 2013 2101 2190 2278 2366 2455 2543 2631 2719 2808 78 67 68 69 69 879 2896 2984 3073 3161 3249 3338 3426 3514 3603 3691 79 68 69 70 70 880 93 3780 3868 3956 4045 4133 4221 4310 4398 4486 4575 80 69 70 70 71 881 4663 4752 4840 4928 5017 5105 5193 5282 5370 5459 81 70 70 71 72 882 5547 5635 5724 5812 5901 5989 6078 6166 6254 6343 82 71 71 72 73 883 6431 6520 6608 6696 6785 6873 6962 7050 7139 7227 83 71 72 73 74 884 7316 7404 7492 7581 7669 7758 7846 7935 8023 8112 84 72 73 74 75 885 8200 8289 8377 8466 8554 8643 8731 8819 8908 8996 85 73 74 75 76 886 9085 9173 9262 9350 9439 9527 9616 9704 9793 9882 86 74|75 76 77 887 9970 0059 0147 0236 0324 o413 0501 0590 0678 0767 87 75 76 77 77 888 94 0855 0944 1032 1121 1209 1298 1387 1475 1564 1652 88 76 77 77 78 889 1741 1829 1918 2007 2095 2184 2272 2361 2449 2538 89 77 77 78 79 890 94 2627 2715 2804 2892 2981 3070 3158 3247 3335 3424 90 77 78 79 80 891 3513 3601 3690J 3778 3867 3956 4044 4133 4222 4310 91 78 79 80 81 892 4399 4487 4576 4665 4753 4842 4931 5019 5108 5197 & 79 80 81 82 893 5285 5374 5463 5551 5640 5729 5817 5906 5995 6083 93 80 81 82 83 894 6172 6261 6349 6438 1 6527 6615 6704 6793 6881 6970 94 81 82 83 84 895 7059 7148 7236 7325 7414 7502 7591 7680 7769 7857 95 82 83 84 85 896 897 7946 8833 8035 8922 8123 8212 8301 9011 9100 9188 8390 9277 8478 9366 8567 9455 8656 9543 8745 9632 96 97 83 83 % 84 85 85 86 898 9721 9810 9899 9987 0076 0165 0254 0342 0431 0520 98 84 85 86 87 899 95 0609 Ot98 0786 0875 0964 1053 1142 1230 1319 1408 99 85 86 87 88 6 I 2 3 4 5 6 7 8 9 86 87 88 89 19 TABLE I. Log LogO -HO Pro. Parts. X 1 2 3 4 5 6 7 8 9 88 89 90 91 0-900 0-95 1497 1586 1675 1763 1852 1941 2030 2119 2208 2296 00 901 2385 2474 2563 2652 2741 2829 2918 3007 3096 3185 01 ] 1 1 1 902 3274 3363 3451 3540 3629 3718 3807 3896 3985 4074 02 2 2 2 903 4163 4251 4340 4429 4518 4607 4696 4785 4874 4963 03 1 3 3 g^ c 904 5052 5140 5229 5318 5407 5496 5585 5674 5763 5852 04 4 4 4 4 905 5941 6030 6119 6208 6296 6385 6474 6563 6652 6741 05 4 4 5 e 906 6830 6919 7008 7097 7186 7275 7364 7453 7542 7631 06 t 5 5 e 907 7720 7809 7898 7987 8076 8165 8254 8343 8432 8521 07 6 6 6 6 908 8610 8699 8788 8877 8966 9055 9144 9233 9322 9411 08 r 7 7 7 909 9500 9589 9678 9767 9856 9945 0034 0123 0212 0301 09 8 8 8 8 910 96 0390 0479 0568 0657 0746 0835 0924 1014 1103 1192 10 9 9 9 9 911 1281 1370 1459 1548 1637 1726 1815 1904 1993 2082 11 10 10 10 10 912 2172 2261 2350 2439 2528 2617 2706 2795 2884 2973 12 11 11 11 11 913 3063 3152 3241 3330 3419 3508 3597 3686 3775 3865 13 11 12 12 12 914 3954 4043 4132 4221 4310 4399 4489 4578 4667 4756 14 12 12 13 13 915 4845 4934 5024 5113 5202 5291 5380 5469 5559 5648 15 13 13 13 14 916 5737 5826 5915 6004 6094 6183 6272 6361 6450 6540 16 14 14 14 15 917 6629 6718 6807 6896 6986 7075 7164 7253 7342 7432 17 15 15 15 15 918 7521 7610 7699 7789 7878 7967 8056 8146 8235 8324 18 16 16 16 16 919 8413 8503 8592 8681 8770 8860 8949 9038 9127 9217 19 17 17 17 17 920 Qfi Q*?0fi qqoK 0404 QK74 QfifiQ 9752 Q841 qoQi o020 olOQ 20 18 18 18 18 921 7D I/3UC 970199 tfOifu 0288 j7*rOT 0377 W I T 0466 i/UUt- 0556 0645 J/OT J 0734 J/I7O 1 0824 UvJrfOV 0913 Ul Vt 1002 21 18 19 19 19 922 1092 1181 1270 1360 1449 1538 1628 1717 1806 1896 22 19 20 20 20 923 1985 2074 2164 2253 2342 2432 2521 2610 2700 2789 23 20 20 21 21 924 2878 2968 3057 3146 3236 3325 3414 3504 3593 3683 24 21 21 22 22 925 3772 3861 3951 4040 4129 4219 4308 4398 4487 4576 25 22 22 23 23 926 4666 4755 4845 4934 5023 5113 5202 5292 5381 5471 26 23 23J23 24 927 5560 5649 5739 5828 5918 6007 6097 6186 6275 6365 21 24 24J24 25 928 6454 6544 6633 6723 6812 6902 6991 7080 7170 7259 28 25 25 25 25 929 7349 7438 7528 7617 7707 7796 7886 7975 8065 8154 29 26 26 26 26 930 97 8244 8333 8423 8512 8602 8691 8781 8870 8960 9049 30 26 27 27 27 931 9139 9228 9318 9407 9497 9586 9676 9765 9855 9944 31 21 28 28 28 932 98 0034 0123 0213 0302 0392 0481 0571 0660 0750 0840 32 28 28 29 29 933 0929 1019 1108 1198 1287 1377 1466 1556 1646 1735 33 -29 2930 30 934 1825 1914 2004 2093 2183 2273 2362 2452 2541 2631 34 30 3031 31 935 2721 2810 2900 2989 3079 3169 3258 3348 3437 3527 35 31 3131 32 936 3617 3706 3796 3885 3975 4065 4154 4244 4334 4423 36 32 32 32 33 937 4513 4603 4692 4782 4871 4961 5051 5140 5230 5320 37 33 33 33 34 938 5409 5499 5589 5678 5768 5858 5947 6037 6127 6216 38 33 34 34 35 939 6306 6396 6485 6575 6665 6754 6844 6934 7024 7113 39 34 35 35 35 940 98 7203 7293 7382 7472 7562 7651 7741 7831 7921 8010 4035 36 36 36 941 8100 8190 8280 8369 8459 8549 8638 8728 8818 8908 4136 36 37 37 942 8997 9087 9177 9267 9356 9446 9536 9626 9715 9805 4237 3738 38 943 9895 9985 0074 0164 0254 0344 0434 0523 0613 0703 4338 383939 944 99 0793 0882 0972 1062 1152 1242 1331 1421 1511 1601 44 39 39 4040 945 1691 1780 1870 1960 2050 2140 2230 2319 2409 2499 45 40 40 41 ! 41 946 2589 2679 2768 2858 2948 3038 3128 3218 3308 3397 46 40 41 41 42 947 3487 3577 3667 3757 3847 3936 4026 4116 4206 4296 47 41 42 42 43 948 4386 4476 4566 4655 4745 4835 4925 5015 5105 5195 48 42 43143 44 949 5285 5374 5464 5554 5644 5734 5824 5914 6004 6094 4943 4444 *5 1 2 3 4 5 6 7 8 9 J 38 8990 n TABLE I. Log (14.2-1 Pro. Parts. Log X I 2 3 4 5 6 7 8 9 88899091 0-950 0-996184 6274 6363 6453 6543 6633 6723 6813 6903 6993 50 4445 45 46 951 7083 7173 7263 7353 7443 7533 7622 7712 7802 7892 51 4545 46 46 952 7982 8072 8162 8252 8342 8432 8522 8612 8702 8792 52 46 46 47 47 953 8882 8972 9062 9152 9242 9332 9422 9512 9602 9692 53 47 47 48 48 954 9782 9872 9962 0052 0142 0232 0322 o412 0502 0592 54 48 48 49 49 955 1-000682 0772 0862 0952 1042 1132 1222 1312 1402 1492 55 48 49 49 50 956 1582 1672 1762 1852 1942 2032 2122j22l2 2302 2392 56 49 5050 51 957 2483 2573 2663 2753 2843 2933 3023 3113 3203 3293 57 50 5151 52 958 3383 3473 3563 3653 3744 3834 3924 4014 4104 4194 58 51 5252 53 959 4284 4374 4464 4554 4644 4735 4825 4915 5005 5095 59 52 53 53 54 960 005185 5275 5365 5456 5546 5636 5726 5816 5906 5996 60 53 53 54 55 961 6086 6177 6267 6357 6447 6537 6627 6717 6808 6898 61 54 54 55 56 962 6988 7078 7168 7258 7349 7439 7529 7619 7709 7799 62 55 55 56 56 963 7890 7980 8070 8160 8250 8341 8431 8521 8611 8701 63 55 56 57 57 964 8792 8882 8972 9062 9152 9243 9333 9423 9513 9603 64 56 57 58 58 965 9694 9784 9874 9964 0055 0145 0235 0325 0415 0506 65 57 58 59 59 966 01 0596 0686 0776 0867 0957 1047 1137 1228 1318 1408 66 58 59 59 60 967 1498 1589 1679 1769 I860 1950 2040 2130 2221 2311 67 59 60 60 61 968 2401 2491 2582 2672 2762 2853 2943 3033 3124 3214 68 60 61 61 62 969 3304 3394 3485 3575 3665 3756 3846 3936 4027 4117 69 61 61 62 63 970 01 4207 4298 4388 4478 4569 4659 4749 4840 4930 5020 70 62 62 63 64 971 5111 5201 5291 5382 5472 5562 5653 5743 5833 5924 71 62 63 64 65 972 6014 6104 6195 6285 6376 6466 6556 6647 6737 6827 72 63 64 65 66 973 6918 7008 7099 7189 7279 7370 7460 7551 7641 7731 73 64 65 66 66 974 7822 7912 8003 8093 8183 8274 8364 8455 8545 8635 74 65 66 67 67 975 8726 8816 8907 8997 908S 9178 9268 9359 9449 9540 75 66 67 67 68 976 9630 9721 9811 9901 9992 0082 0173 0263 0354 0444 76 67 68 68 69 977 020535 0625 0716 0806 0897 0987 1077 1168 1258 1349 77 68 69 69 70 978 1439 1530 1620 1711 1801 1892 1982 2073 2163 2254 78 69 69 70 71 979 2344 2435 2525 2616 2706 2797 2887 2978 3068 3159 79 70 70 71 72 980 02 3249 3340 3430 3521 3612 3702 3793 3883 3974 4064 80 70 71 72 73 981 4155 4245 4336 4426 4517 4607 4698 4789 4879 4970 81 71 72 73 74 982 5060 5151 5241 5332 5422 5513 5604 5694 5785 5875 82 72 73 74 75 983 5966 6057 6147 6238 6328 6419 6509 6600 6691 6781 83 73 74 75 76 984 6872 6962 7053 7144 7234 7325 7415 7506 7597 7687 84 74 75 76 76 985 7778 7869 7959 8050 8140 8231 8322 8412 8503 8594 85 75 76 77 77 986 8684 8775 8866 8956 9047 9137 9228 9319 9409 9500 86 76 77 77 78 987 9591 9681 9772 9863 9953 0044 0135 0225 0316 o407 87 77 77 78 79 988 03 0497 0588 0679 0769 0860 0951 1042 1132 1223 1314 88 77 78 '79 80 989 1404 1495 1586 1676 1767 1858 1948 2039 2130 2221 89 78 79 80 81 990 032311 2402 2493 2584 2674 2765 2856 2946 3037 3128 90 79 80 81 82 991 3219 3309 3400 3491 3582 3672 3763 3854 3945 4035 91 80 81 82 83 992 4126 4217 4308 4398 4489 4580 4671 4761 4852 4943 92 81 82 83 84 993 5034 5125 5215 5306 5397 5488 5578 5669 5760 5851 93 82 8384 85 994 5942 6032 6123 6214 6305 6396 6486 6577 6668 6759 94 83 8485 86 995 6850 6940 7031 7122 7213 7304 7395 7485 7576 7667 95 84 85'85 86 996 7758 7849 7940 8030 8121 8212 8303 8394 8485 8575 96 84185 86 87 997 8666 8757 8848 8939 9030 9121 9211 9302 9393 9484 97 85 86 87 88 998 9575 9666 9757 9848 9938 0029 0120 0211 0302 0393 98 868788 89 999 04 0484 0575 0665 0756 0847 0938 1029 1120 1211 1302 99 87 88 89 90 1 2 3 4 5 6 7 8 9 88 89J90 91 TABLE I. Log Log(l+) Pro. Parts. 3C 1 2 3 4 5 6 7 8 9 30 31 2 93 1-000 1-04 1393 1484 1575 1665 1756 1847 1938 2029 2120 2211 00 001 2302 2393 2484 2575 2666 2757 2847 2938 3029 3120 01 1 1 1 1 002 3211 3302 3393 3484 3575 3666 3757 3848 3939 4030 02 2 2 2 2 003 4121 4212 4303 4394 4485 4576 4667 4758 4849 4940 03 3 3 3 004- 5031 5122 5213 5304 5395 5486 5577 5668 5759 5850 04 4 4 4 4 005 5941 6032 6123 6214 6305 6396 6487 6578 6669 6760 05 K e e 5 006 6851 6942 7033 7124 7215 7306 7397 7488 7579 7670 06 K ^ K 6 6 007 7761 7852 7943 8034 8125 8216 8307 8398 8489 8580 07 6 6 6 7 008 8671 8763 8854 8945 9036 9127 9218 9309 9400 9491 08 rv 1 7 1 r 7 009 9582 9673 9764 9855 9946 0038 0129 0220 0311 o402 09 8 8 8 8 010 05 0493 0584 0675 0766 0857 0949 1040 1131 1222 1313 10 9 9 ( 9 on 1404 1495 1586 1677 1769 1860 1951 2042 2133 2224 11 10 10 10 10 012 2315 2407 2498 2589 2680 2771 2862 2953 3045 3136 12 11 11 11 11 013 3227 3318 3409 3500 3591 3683 3774 3865 3956 4047 13 12 12 12 12 014 4138 4230 4321 4412 4503 4594 4686 4777 4868 4959 14 13 13 13 13 015 5050 5141 5233 5324 5415 5506 5597 5689 5780 5871 1.5 13 14 14 14 016 5962 6053 6145 6236 6327 6418 6510 6601 6692 6783 16 14 15 15 15 017 6874 6966 7057 7148 7239 7331 7422 7513 7604 7696 17 15 15 16 16 018 7787 7878 7969 8061 8152 8243 8334 8426 8517 8608 18 16 16 17 Iry t 019 8699 8791 8882 8973 9064 9156 9247 9338 9430 9521 19 17 17 17 18 020 059612 9703 9795 9886 9977 0069 0160 0251 0342 0434 80 18 18 18 19 021 06 0525 0616 0708 0799 0890 0982 1073 1164 1255 1347 21 19 19 19 20 022 1438 1529 1621 1712 1803 1895 1986 2077 2169 2260 22 20 -20 20 20 023 2351 2443 2534 2625 2717 2808 2899 2991 3082 3173 23 2 21 2 21 024 3265 3356 3448 3539 3630 3722 3813 3904 3996 4087 24 22 22 2-- 22 025 4179 4270 4361 4453 4544 4635 4727 4818 4910 5001 2.5 23 23 23 23 026 5092 5184 5275 5367 5458 5549 5641 5732 5824 5915 26 23 24 24 24 027 6006 6098 6189 6281 6372 6463 6555 6646 6738 6829 27 24 25 2o 25 028 6921 7012 7103 7195 7286 7378 7469 7561 7652 7743 28 2o 2.5 2f 26 029 7835 7926 8018 8109 8201 8292 8384 8475 8567 8658 29 26 26 27 27 030 06 8749 8841 8932 9024 9115 9207 9298 9390 9481 9573 30 27 r 28 28 031 9664 9756 9847 9939 0030 0122 0213 0305 0396 0488 31 28 28 29 29 032 07 0579 0671 0762 0854 0945 1037 1128 1220 1311 1403 32 29 29 29 30 033 1494 1586 1677 1769 1860 1952 2043 2135 2226 2318 33 30 30 30 31 034 2409 2501 2593 2684 2776 2867 2959 3050 3142 3233 34 31 3 31 32 035 3325 3416 3508 3600 3691 3783 3874 3966 4057 4149 3.5 31 32 32 33 036 4241 4332 4424 4515 4607 4698 4790 4882 4973 5065 36 32 33 33 33 037 5156 5248 5340 5431 5523 5614 5706 5797 5889 5981 37 33 34 34 34 038 6072 6164 6256 6347 6439 6530 6622 6714 6805 6897 38 34 35 35 35 039 6988 7080 7172 7263 7355 7447 7538 7630 7722 7813 39 35 35 36 36 040 07 7905 7996 8088 8180 8271 8363 8455 8546 8638 8730 40 36 36 37 37 041 8821 8913 9005 9096 9188 9280 9371 9463 9555 9646 41 37 37 38 38 042 9738 9830 9921 0013 o!05 0196 0288 0380 0471 0563 42 38 38 39 39 043 08 0655 0747 0838 0930 1022 1113 1205 1297 1388 1480 43 39 39 40 40 044 1572 1664 1755 1847 1939 2030 2122 2214 2306 2397 44 40 40 40 41 045 2489 2581 2673 2764 2856 2948 3040 3131 3223 3315 45 41 41 41 42 016 3406 3498 3590 3682 3773 3865 3957 4049 4141 4232 46 41 42 42 43 047 4324 4416 4508 4599 4691 4783 4875 4966 5058 5150 47 4-2 43 43 44 048 5242 5334 5425 5517 5609 5701 5792 5884 5976 6068 48 43 44 44 45 049 6160 6251 6343 6435 6527 6619 6711 6802 6894 6986 49 44 45 45 46 1 2 3 4 5 6 7 8 9 ' 90 91 92 93 22 TABLE I. Log Log(l+;r) Pro. Parts. X 1 2 3 4 5 6 7 8 9 90 91 92 93 1-050 1-08 7078 7170 7261 7353 7445 7537 7629 7721 7812 7904 50 45 46 46 47 051 7996 8088 8180 8272 8363 8455 8547 8639 8731 8823 51 46 46 47 47 052 8914 9006 9098 9190 9282 9374 9466 9557 9649 9741 52 47 47 48 48 053 9833 9925 0017 o!09 0201 0292 0384 0476 0568 0660 53 48 48 49 49 054 09 0752 0844 0936 1027 1119 1211 1303 1395 1487 1579 54 49 49 50 50 055 1671 1763 1855 1946 2038 2130 2222 2314 2406 2498 55 49 50 51 51 056 2590 2682 2774 2866 2958 3049 3141 3233 3325 3417 56 50 51 52 52 057 3509 3601 3693 3785 3877 3969 4061 4153 4245 4337 57 51 52 52 53 058 4429 4521 4613 4704 4796 4888 4980 5072 5164 5256 58 52 53 53 54 059 5348 5440 5532 5624 5716 5808 5900 5992 6084 6176 59 53 54 54 55 060 09 6268 6360 6452 6544 6636 6728 6820 6912 7004 7096 60 54 55 55 56 061 7188 7280 7372 7464 7556 7648 7740 7832 7924 8016 61 55 56 56 57 062 8108 8200 8292 8384 8476 8568 8660 8752 8844 8936 62 56 56 57 58 063 9028 9120 9213 9305 9397 9489 9581 9673 9765 9857 63 57 57 58 59 064 9949 0041 0133 0225 0317 0409 0501 0593 0685 0777 64 58 58 59 60 065 100870 0962 1054 1146 1238 1330 1422 1514 1606 1698 65 59 59 60 60 066 1790 1882 1975 2067 2159 2251 2343 2435 2527 2619 66 59 60 61 61 067 2711 2803 2896 2988 3080 3172 3264 3356 3448 3540 67 60 61 62 62 068 3632 3725 3817 3909 4001 4093 4185 4277 4370 4462 68 61 62 63 63 069 4554 4646 4738 4830 4922 5015 5107 5199 5291 5383 69 62 63 63 64 070 10 5475 5567 5660 5752 5844 5936 6028 6120 6213 6305 70 63 64 64 65 071 6397 6489 6581 6673 6766 6858 6950 7042 7134 7227 71 64 65 65 66 072 7319 7411 7503 7595 7688 7780 7872 7964 8056 8149 72 65 66 66 67 073 8241 8333 8425 8517 8610 8702 8794 8886 8978 9071 73 66 66 67 68 074 9163 9255 9347 9440 9532 9624 9716 9808 9901 9993 74 67 67 68 69 075 11 0085 0177 0270 0362 0454 0546 0639 0731 0823 0915 75 67 68 69 70 076 1008 1100 1192 1284 1377 1469 1561 1653 1746 1838 76 68 69 70 71 077 1930 2023 2115 2207 2299 2392 2484 2576 2669 2761 77 69 70 71 72 078 2853 2945 3038 3130 3222 3315 3407 3499 3591 3684 78 70 71 72 73 079 3776 3868 3961 4053 4145 4238 4330 4422 4515 4607 79 71 72 73 73 080 114699 4792 4884 4976 5068 5161 5253 5345 5438 5530 80 72 73 74 74 081 5622 5715 5807 5899 5992 6084 6177 6269 6361 6454 81 73 74 75 75 082 6546 6638 6731 6823 6915 7008 7100 7192 7285 7377 82 74 75 75 76 083 7470 7562 7654 7747 7839 7931 8024 8116 8209 8301 83 75 76 76 77 084 8393 8486 8578 8670 8763 8855 8948 9040 9132 9225 84 76 76 77 78 085 9317 9410 9502 9594 9687 9779 9872 9964 0057 0149 85 77 77 78 79 086 120241 0334 0426 0519 0611 0703 0796 0888 0981 1073 86 77 78 79 80 087 1166 1258 1351 1443 1535 1628 1720 1813 1905 1998 87 78 79 80 81 088 2090 2183 2275 2367 2460 2552 2645 2737 2830 2922 88 89 80 81 82 089 3015 3107 3200 3292 3385 3477 3569 3662 3754 3847 89 80 81 82 83 090 123939 4032 4124 4217 4309 4402 4494 4587 4679 4772 90 81 82 83 84 091 4864 4957 5049 5142 5234 5327 5419 5512 5604 5697 91 82 83 84 85 092 5789 5882 5974 6067 6159 6252 6344 6437 6530 6622 92 83 84 85 86 093 6715 6807 6900 6992 7085 7177 7270 7362 7455 7547 93 84 85 86 86 094 7640 7733 7825 7918 8010 8103 8195 8288 8380 8473 94 85 86 86 87 095 8566 8658 8751 8843 8936 9028 9121 9214 9306 9399 95 85 86 87 88 096 9491 9584 9676 9769 9862 9954 0047 0139 0232 0324 96 86 87 88 89 097 130417 0510 0602 0695 0787 0880 0973 1065 1158 1251 97 87 88 89 90 098 1343 1436 1528 1621 1714 1806 1899 1991 2084 2177 98 88 89 90 91 099 2269 2362 2455 2547 2640 2732 2825 2918 3010 3103 99 69 90 91 92 1 2 3 4 5 6 7 8 9 90 91 92 93 TABLE I. Log Log (1- h*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 92 93 94 1-100 1-133196 3288 3381 3474 3566 3659 3751 3844 3937 4029 00 101 4122 4215 4307 4400 4493 4585 4678 4771 4863 4956 1 1 ; 102 5049 5141 5234 5327 5419 5512 5605 5698 5790 5883 o-. 2 2 2 103 5976 6068 6161 6254 6346 6439 6532 6624 6717 6810 o: 3 3 < 104 6903 6995 7088 7181 7273 7366 7459 7551 7644 7737 04 4 4 4 105 7830 7922 8015 8108 8201 8293 8386 8479 8571 8664 Oo 5 5 5 106 8757 8850 8942 9035 9128 9221 9313 9406 9499 9592 06 6 6 6 107 9684 9777 9870 9963 0055 0148 0241 0334 0426 0519 97 6 7 7 108 140612 0705 0797 0890 0983 1076 1169 1261 1354 1447 08 7 7| 8 109 1540 1632 1725 1818 1911 2004 2096 2189 2282 2375 Of 8 8 8 110 142468 2560 2653 2746 2839 2932 3024 3117 3210 3303 10 9 9 9 111 3396 3488 3581 3674 3767 3860 3952 4045 4138 4231 11 10 10 10 112 4324 4417 4509 4602 4695 4788 4881 4974 5066 5159 12 11 11 11 113 5252 5345 5438 5531 5624 5716 5809 5902 5995 6088 13 1-2 12 12 114 6181 6273 6366 6459 6552 6645 6738 6831 6924 7016 14 13 13 13 115 7109 7202 7295 7388 7481 7574 7667 7759 7852 7945 lo 14 14 14 116 8038 8131 8224 8317 8410 8503 8595 8688 8781 8874 16 15 15 15 117 8967 9060 9153 9246 9339 9432 9525 9617 9710 9803 17 16 16 16 118 9896 9989 0082 0175 0268 0361 0454 0547 0640 0733 18 17 17 17 119 150825 0918 1011 1104 1197 1290 1383 1476 1569 1662 1! 17 18 18 120 15 1755 1848 1941 2034 2127 2220 2313 2406 2498 2591 20 18 19 19 121 2684 2777 2870 2963 3056 3149 3242 3335 3428 3521 y 19 20 20 122 3614 3707 3800 3893 3986 4079 4172 4265 4358 4451 22 -20 20 21 123 4544 4637 4730 4823 4916 5009 5102 5195 5288 5381 2'. 21 21 22 124 5474 5567 5660 5753 5846 5939 6032 6125 6218 6311 24 22 2-2 23 125 6404 6497 6590 6683 6776 6869 6962 7055 7148 7241 25 23 23 24 126 7335 7428 7521 7614 7707 7800 7893 7986 8079 8172 26 24 24 24 127 8265 8358 8451 8544 8637 8730 8823 8916 9009 9103 27 25 25 25 128 9196 9289 9382 9475 9568 9661 9754 9847 9940 0033 28 -26 26 26 129 160126 0219 0313 0406 0499 0592 0685 0778 0871 0964 29 27 27 27 130 16 1057 1150 1243 1337 1430 1523 1616 1709 1802 1895 30 28 28 28 131 1988 2081 2175 2268 2361 2454 2547 2640 2733 2826 31 29 29 29 132 2920 3013 3106 3199 3292 3385 3478 3571 3665 3758 32 29 30 30 133 3851 3944 4037 4130 4223 4317 4410 4503 4596 4689 33 30 31 31 134 4782 4876 4969 5062 5155 5248 5341 5435 5528 5621 31 31 32 32 135 5714 5807 5900 5994 6087 6180 6273 6366 6459 6553 35 32 33 33 136 6646 6739 6832 6925 7019 7112 7205 7298 7391 7485 36 33 33 34 137 7578 7671 7764 7857 7951 8044 8137 8230 8323 8417 37 34 34 35 138 8510 8603 8696 8790 8883 8976 9069 9162 9256 9349 38 35 35 36 139 9442 9535 9629 9722 9815 9908 0001 0095 0188 0281 39 36 36 37 140 170374 0468 0561 0654 0747 0841 0934 1027 1120 1214 40 37 3738 141 1307 1400 1494 1587 1680 1773 1867 1960 2053 2146 41 3SI38 39 142 2240 2333 2426 2519 2613 2706 2799 2893 2986 3079 4-2 39 39 39 143 3172 3266 3359 3452 3546 3639 3732 3826 3919 4012 40 40 40 144 4105 4199 4292 4385 4479 4572 4665 4759 4852 4945 44 40 41 41 145 5039 5132 5225 5318 5412 5505 5598 5692 5785 5878 45 41 12 42 146 5972 6065 6158 6252 6345 6438 6532 6625 6718 6812 46 42 13 13 147 6905 6998 7092 7185 7279 7372 7465 7559 7652 7745 47 1344 14 148 7839 7932 8025 8119 8212 8305 8399 8492 8586 8679 48 1445 15 149 8772 8866 8959 9052 9146 9239 9333 9426 9519 9613 49 15 < t6 16 1 2 3 4 5 6 7 8 9 3-2 f )3 n 24 TABLE I. Log Log(l+*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 92 93 94 1-150 1-179706 9800 9893 9986 0080 0173 0267 0360 0453 o547 50 46 47 47 151 18 0640 0734 0827 0920 1014 1107 1201 1294 1387 1481 51 47 47 48 152 1574 1668 1761 1854 1948 2041 2135 2228 2322 2415 52 48 48 49 153 2508 2602 2695 2789 2882 2976 3069 3163 3256 3349 53 49 49 50 154 3443 3536 3630 3723 3817 3910 4004 4097 4190 4284 54 50 50 51 155 4377 4471 4564 4658 4751 4845 4938 5032 5125 5219 55 51 51 52 156 5312 5406 5499 5592 5686 5779 5873 5966 6060 6153 56 52 52 53 157 6247 6340 6434 6527 6621 6714 6808 6901 6995 7088 57 52 53 54 158 7182 7275 7369 7462 7556 7649 7743 7836 7930 8023 58 53 54 55 159 8117 8210 8304 8397 8491 8584 8678 8772 8865 8959 59 54 55 55 160 189052 9146 9239 9333 9426 9520 9613 9707 9800 9894 60 55 56 56 161 9987 0081 0175 0268 0362 0455 0549 0642 0736 0829 61 56 57 57 162 190923 1017 1110 1204 1297 1391 1484 1578 1671 1765 62 57 58 58 163 1859 1952 2046 2139 2233 2326 2420 2514 2607 2701 63 58 59 59 164- 2794 2888 2982 3075 3169 3262 3356 3449 3543 3637 64 59 60 60 165 3730 3824 3917 4011 4105 4198 4292 4386 4479 4573 65 60 60 61 166 4666 4760 4854 4947 5041 5134 5228 5322 5415 5509 66 61 61 62 167 5603 5696 5790 5883 5977 6071 6164 6258 6352 6445 67 62 62 63 168 6539 6633 6726 6820 6913 7007 7101 7194 7288 7382 68 63 63 64 169 7475 7569 7663 7756 7850 7944 8037 8131 8225 8318 69 63 64 65 170 198412 8506 8599 8693 8787 8880 8974 9068 9161 9255 70 64 65 66 171 9349 9442 9536 9630 9723 9817 9911 0004 0098 0192 71 65 66 67 172 20 0286 0379 0473 0567 0660 0754 0848 0941 1035 1129 72 66 67 68 173 1223 1316 1410 1504 1597 1691 1785 1879 1972 2066 73 67 68 69 174 2160 2253 2347 2441 2535 2628 2722 2816 2910 3003 74 68 69 70 175 3097 3191 3284 3378 3472 3566 3659 3753 3847 3941 75 69 70 70 176 4034 4128 4222 4316 4409 4503 4597 4691 4784 4878 76 70 71 71 177 4972 5066 5160 5253 5347 5441 5535 5628 5722 5816 77 71 72 72 178 5910 6003 6097 6191 6285 6379 6472 6566 6660 6754 78 72 73 73 179 6847 6941 7035 7129 7223 7316 7410 7504 7598 7692 79 73 73 74 180 20 7785 7879 7973 8067 8161 8254 8348 8442 8536 8630 80 74 74 75 181 8724 8817 8911 9005 9099 9193 9286 9380 9474 9568 81 75 75 76 182 9662 9756 9849 9943 0037 0131 0225 0319 0412 0506 82 75 76 77 183 21 0600 0694 0788 0882 0976 1069 1163 1257 1351 1445 83 76 77 78 184 1539 1632 1726 1820 1914 2008 2102 2196 2290 2383 84 77 78 79 185 2477 2571 2665 2759 2853 2947 3040 3134 3228 3322 85 78 79 80 186 3416 3510 3604 3698 3792 3885 3979 4073 4167 4261 86 79 80 81 187 4355 4449 4543 4637 4730 4824 4918 5012 5106 5200 87 80 81 82 188 5294 5388 5482 5576 5670 5763 5857 5951 6045 6139 88 81 82 83 189 6233 6327 6421 6515 6609 6703 6797 6891 6984 7078 89 82 83 84 190 21 7172 7266 7360 7454 7548 7642 7736 7830 7924 8018 90 83 84 85 191 8112 8206 8300 8394 8488 8582 8675 8769 8863 8957 91 84 85 86 192 9051 9145 9239 9333 9427 9521 9615 9709 9803 9897 92 85 86 86 193 9991 0085 0179 0273 o367 0461 0555 0649 0743 0837 93 86 86 87 194 22 0931 1025 1119 1213 1307 1401 1495 1589 1683 1777 94 86 87 88 195 1871 1965 2059 2153 2247 2341 2435 2529 2623 2717 95 87 88 89 196 2811 2905 2999 3093 3187 3281 3375 3469 3563 3657 96 88 89 90 197 3751 3845 3939 4033 4127 4221 4315 4409 4503 4597 97 89 90 91 198 4691 4785 4879 4973 5068 5162 5256 5350 5444 5538 98 90 91 92 199 5632 5726 5820 5914 6008 6102 6196 6290 6384 6478 99 91 92 93 1 2 3 4 5 6 7 8 9 92 93 94 25 TABLE 1. Log Log (1+ar) Pro. Parts. X 1 2 3 4 5 6 7 8 9 94 95 96 1-200 1-226572 6666 6761 6855 6949 7043 7137 7231 7325 7419 00 201 7513 7607 7701 7795 7889 7983 8078 8172 8266 8360 01 1 1 1 202 8454 8548 8642 8736 8830 8924 9018 9113 9207 9301 02 2 2 2 203 9395 9489 9583 9677 9771 9865 9960 0054 0148 0242 03 g 3 3 204 23 0336 0430 0524 0618 0712 0807 0901 0995 1089 1183 04 4 4 4 205 1277 1371 1465 1560 1654 1748 1842 1936 2030 2124 GJ t 5 5 206 2219 2313 2407 2501 2595 2689 2783 2878 2972 3066 06 6 6 6 207 3160 3254 3348 3443 3537 3631 3725 3819 3913 4007 07 7 7 7 208 4102 4196 4290 4384 4478 4573 4667 4761 4855 4949 08 8 8 8 209 5043 5138 5232 5326 5420 5514 5608 5703 5797 5891 09 e 9 9 210 23 5985 6079 6174 6268 6362 6456 6550 6645 6739 6833 10 9 10 10 211 6927 7021 7116 7210 7304 7398 7492 7587 7681 7775 11 10 10 11 212 7869 7964 8058 8152 8246 8340 8435 8529 8623 8717 12 11 11 12 213 8812 8906 9000 9094 9189 9283 9377 9471 9565 9660 13 12 12 12 214 9754 9848 9942 0037 0131 0225 0319 0414 0508 0602 14 13 13 13 215 24 0696 0791 0885 0979 1073 1168 1262 1356 1451 1545 1 f 14 14 14 216 1639 1733 1828 1922 2016 2110 2205 2299 2393 2487 16 15 15 15 217 2582 2676 2770 2865 2959 3053 3147 3242 3336 3430 17 16 16 16 218 3525 3619 3713 3808 3902 3996 4090 4185 4279 4373 18 17 1 1 17 219 4468 4562 4656 4751 4845 4939 5033 5128 5222 5316 If 18 18 18 220 245411 5505 5599 5694 5788 5882 5977 6071 6165 6260 20 19 19 19 221 6354 6448 6543 6637 6731 6826 6920 7014 7109 7203 21 20 20 20 222 7297 7392 7486 7580 7675 7769 7863 7958 8052 8146 22 21 21 21 223 8241 8335 8429 8524 8618 8713 8807 8901 8996 9090 23 22 22 22 224 9184 9279 9373 9467 9562 9656 9751 9845 9939 0034 24 23 23 23 225 250128 0222 0317 0411 0506 0600 0694 0789 0883 0978 25 24 24 24 226 1072 1166 1261 1355 1450 1544 1638 1733 1827 1922 26 24 25 25 227 2016 2110 2205 2299 2394 2488 2582 2677 2771 2866 27 25 '26 26 228 2960 3054 3149 3243 3338 3432 3527 3621 3715 3810 28 26 27 27 229 3904 3999 4093 4187 4282 4376 4471 4565 4660 4754 29 27 28 28 230 25 4849 4943 5037 5132 5226 5321 5415 5510 5604 5699 30 28 28 29 231 5793 5887 5982 6076 6171 6265 6360 6454 6549 6643 31 29 29 30 232 6738 6832 6926 7021 7115 7210 7304 7399 7493 7588 32 3( 30 31 233 7682 7777 7871 7966 8060 8155 8249 8344 8438 8533 33 31 31 32 234 8627 8722 8816 8911 9005 9100 9194 9289 9383 9477 34 32 32 33 235 9572 9666 9761 9855 9950 0045 o!39 0234 0328 o423 35 33 33 34 236 260517 0612 0706 0801 0895 0990 1084 1179 1273 1368 36 34 34 35 237 1462 1557 1651 1746 1840 1935 2029 2124 2218 2313 37 35 35 36 238 2408 2502 2597 2691 2786 2880 2975 3069 3164 3258 38 36 36 36 239 3353 3447 3542 3637 3731 3826 3920 4015 4109 4204 39 37 37 37 240 26 4298 4393 4488 4582 4677 4771 4866 4960 5055 5150 40 38 38 38 241 5244 5339 5433 5528 5622 5717 5812 5906 6001 6095 41 39 39 39 242 6190 6284 6379 6474 6568 6663 6757 6852 6947 7041 42 39 40 40 243 7136 7230 7325 7420 7514 7609 7703 7798 7893 7987 43 40 41 41 244 8082 8176 8271 8366 8460 8555 8649 8744 8839 8933 44 41 42 42 245 9028 9122 9217 9312 9406 9501 9596 9690 9785 9879 45 42 43 43 246 9974 0069 0163 0258 0353 0447 0542 0637 0731 0826 46 43 44 44 247 27 0920 1015 1110 1204 1299 1394 1488 1583 1678 1772 47 44 45 45 248 1867 1962 2056 2151 2246 2340 2435 2530 2624 2719 48 45 46 46 249 2813 2908 3003 3097 3192 3287 3382 3476 3571 3666 49 46 47 47 1 2 3 4 5 6 7 8 9 94 95 96 26 TABLE I Lo (}+x}~ Pro. Parts. Log & \ ~T X 1 2 3 4 5 6 7 8 9 94 95 96 1-250 1-27 3760 3855 3950 4044 4139 4234 4328 4423 4518 4612 50 47 48 48 251 4707 4802 4896 4991 5086 5180 5275 5370 5465 5559 51 48 48 49 252 5654 5749 5843 5938 6033 6127 6222 6317 6412 6506 52 49 49 50 253 6601 6696 6790 6885 6980 7075 7169 7264 7359 7453 53 50 50 51 254 7548 7643 7738 7832 7927 8022 8117 8211 8306 8401 54 51 51 52 255 8495 8590 8685 8780 8874 8969 9064 9159 9253 9348 55 52 52 53 256 9443 9538 9632 9727 9822 9917 0011 0106 0201 0296 56 53 53 54 257 28 0390 0485 0580 0675 0769 0864 0959 1054 1148 1243 57 54 54 55 258 1338 1433 1528 1622 1717 1812 1907 2001 2096 2191 58 55 55 56 259 2286 2380 2475 2570 2665 2760 2854 2949 3044 3139 59 55 56 57 260 28 3234 3328 3423 3518 3613 3708 3802 3897 3992 4087 60 56 57 58 261 4182 4276 4371 4466 4561 4656 4750 4845 4940 5035 61 57 58 59 262 5130 5224 5319 5414 5509 5604 5699 5793 5888 5983 62 58 59 60 263 6078 6173 6267 6362 6457 6552 6647 6742 6836 6931 63 59 60 60 264 7026 7121 7216 7311 7405 7500 7595 7690 7785 7880 64 60 61 61 265 7975 8069 8164 8259 8354 8449 8544 8638 8733 8828 65 61 62 62 266 8923 9018 9113 9208 9302 9397 9492 9587 9682 9777 66 62 63 63 267 9872 9967 0061 0156 0251 0346 0441 0536 0631 0726 67 63 64 64 268 29 0820 0915 1010 1105 1200 1295 1390 1485 1580 1674 68 64 65 65 269 1769 1864 1959 2054 2149 2244 2339 2434 2528 2623 69 65 66 66 270 292718 2813 2908 3003 3098 3193 3288 3383 3478 3572 70 66 66 67 271 3667 3762 3857 3952 4047 4142 4237 4332 4427 4522 71 67 67 68 272 4617 4712 4806 4901 4996 5091 5186 5281 5376 5471 72 08 68 69 273 5566 5661 5756 5851 5946 6041 6136 6230 6325 6420 73 69 69 70 274 6515 6610 6705 6800 6895 6990 7085 7180 7275 7370 74 70 70 71 275 7465 7560 7655 7750 7845 7940 8035 8130 8225 8320 75 70 71 72 276 8414 8509 8604 8699 8794 8889 8984 9079 9174 9269 76 71 72 73 277 9364 9459 9554 9649 9744 9839 9934 0029 0124 0219 77 72 73 74 278 30 0314 0409 0504 0599 0694 0789 0884 0979 1074 1169 78 73 74 75 279 1264 1359 1454 1549 1644 1739 1834 1929 2024 2119 79 74 75 76 280 302214 2309 2404 2499 2594 2689 2784 2879 2974 3069 80 75 76 77 281 3164 3259 3354 3449 3544 3639 3735 3830 3925 4020 81 76 77 78 282 4115 4210 4305 4400 4495 4590 4685 4780 4875 4970 82 77 78 79 283 5065 5160 5255 5350 5445 5540 5635 5730 5825 5921 83 78 79 80 284 6016 6111 6206 6301 6396 6491 6586 6681 6776 6871 84 79 80 81 285 6966 7061 7156 7251 7346 7442 7537 7632 7727 7822 85 80 81 82 286 7917 8012 8107 8202 8297 8392 8487 8583 8678 8773 86 81 82 83 287 8868 8963 9058 9153 9248 9343 9438 9533 9629 9724 87 82 83 84 288 9819 9914 0009 0104 0199 0294 0389 0484 0580 0675 88 83 84 84 289 31 0770 0865 0960 1055 1150 1245 1340 1436 1531 1626 89 84 85 85 290 31 1721 1816 1911 2006 2101 2197 2292 2387 2482 2577 90 85 86 86 291 2672 2767 2862 2958 3053 3148 3243 3338 3433 3528 91 86 86 87 292 3624 3719 3814 3909 4004 4099 4194 4290 4385 4480 92 86 87 88 293 4575 4670 4765 4861 4956 5051 5146 5241 5336 5431 93 87 88 89 294 5527 5622 5717 5812 5907 6002 6098 6193 6288 6383 94 88 89 90 295 6478 6574 6669 6764 6859 6954 7049 7145 7240 7335 95 89 90 91 296 7430 7525 7621 7716 7811 7906 8001 8096 8192 8287 96 90 91 92 297 8382 8477 8572 8668 8763 8858 8953 9048 9144 9239 97 91 92 93 298 9334 9429 9524 9620 9715 9810 9905 oOOl 0096 0191 98 92 93 94 299 32 0286 0381 0477 0572 0667 0762 0858 0953 1048 1143 99 93 94 95 1 2 3 4 5 6 7 8 9 94 95 96 27 TABLE I. Log Log(l+*) Pro. Parts. X 1 2 3 4 5 6 7 8 9 9596 97 1-300 1-32 1238 1334 1429 1524 1619 1715 1810 1905 2000 2095 00 301 2191 2286 2381 2476 2572 2667 2762 2857 2953 3048 01 1 1 1 302 3143 3238 3334 3429 3524 3619 3715 3810 3905 4000 02 2 2: 2 303 4096 4191 4286 4381 4477 4572 4667 4763 4858 4953 03 3 3 3 304 5048 5144 5239 5334 5429 5525 5620 5715 5811 5906 04- 4 4 4 305 6001 6096 6192 6287 6382 6477 6573 6668 6763 6859 05 5 5 5 306 6954 7049 7144 7240 7335 7430 7526 7621 7716 7812 00 6 6 6 307 7907 8002 8097 8193 8288 8383 8479 8574 8669 8765 07 7| 7 7 308 8860 8955 9051 9146 9241 9336 9432 9527 9622 9718 08 888 309 9813 9908 0004 0099 0194 0290 0385 o480 0576 0671 09 9 9i 9 310 33 0766 0862 0957 1052 1148 1243 1338 1434 1529 1624 10 10 10 10 311 1720 1815 1910 2006 2101 2196 2292 2387 2482 2578 11 10 11 11 312 2673 2769 2864 2959 3055 3150 3245 3341 3436 3531 12 11 12 12 313 3627 3722 3817 3913 4008 4104 4199 4294 4390 4485 13 12 12 13 314 4580 4676 4771 4867 4962 5057 5153 5248 5343 5439 14 13 13 14 315 5534 5630 5725 5820 5916 6011 6106 6202 6297 6393 15 14 14 15 316 6488 6583 6679 6774 6870 6965 7060 7156 7251 7347 16 15 15 16 317 7442 7537 7633 7728 7824 7919 8014 8110 8205 8301 17 16 16 16 318 8396 8491 8587 8682 8778 8873 8969 9064 9159 9255 18 17 17 17 319 9350 9446 9541 9637 9732 9827 9923 0018 0114 0209 19 18 18 18 320 34 0305 0400 0495 0591 0686 0782 0877 0973 1068 1163 20 19 1919 321 1259 1354 1450 1545 1641 1736 1832 1927 2022 2118 21 20 2020 322 2213 2309 2404 2500 2595 2691 2786 2882 2977 3072 22 21 2121 323 3168 3263 3359 3454 3550 3645 3741 3836 3932 4027 23 22 2222 324 4123 4218 4314 4409 4505 4600 4695 4791 4886 4982 24 23 2323 325 5077 5173 5268 5364 5459 5555 5650 5746 5841 5937 25 24 24 24 326 6032 6128 6223 6319 6414 6510 6605 6701 6796 6892 2(i 25 25| 25 327 6987 7083 7178 7274 7369 7465 7560 7656 7751 7847 27 26 26 26 328 7942 8038 8133 8229 8324 8420 8515 86J1 8706 8802 28 27 27 27 329 8897 8993 9089 9184 9280 9375 9471 9566 9662 9757 29 28 28 28 330 34 9853 9948 0044 0139 0235 0330 0426 0521 0617 0713 30 28 2929 331 35 0808 0904 0999 1095 1190 1286 1381 1477 1572 1668 31 29 30 30 332 1764 1859 1955 2050 2146 2241 2337 2432 2528 2624 32 30 3131 333 2719 2815 2910 3006 3101 3197 3293 3388 3484 3579 33 31 32 32 334 3675 3770 3866 3961 4057 4153 4248 4344 4439 4535 34 32 33 33 335 4631 4726 4822 4917 5013 5108 5204 5300 5395 5491 35 33 34 34 336 5586 5682 5778 5873 5969 6064 6160 6256 6351 6447 36 34 35 35 337 6542 6638 6734 6829 6925 7020 7116 7212 7307 7403 37 35 36 36 338 7498 7594 7690 7785 7881 7976 8072 8168 8263 8359 38 36 36 37 339 8455 8550 8646 8741 8837 8933 9028 9124 9220 9315 39 37 37 38 340 359411 9506 9602 9698 9793 9889 9985 0080 0176 0271 40 38 38 39 341 36 0367 0463 0558 0654 0750 0845 0941 1037 1132 1228 41 39 3940 342 1324 1419 1515 1610 1706 1802 1897 1993 2089 2184 42 40 40 41 343 2280 2376 2471 2567 2663 2758 2854 2950 3045 3141 43 41 41 42 344 3237 3332 3428 3524 3619 3715 3811 3906 4002 4098 44 42 42 43 345 4193 4289 4385 44ftO 4576 4672 4767 4863 4959 5055 45 43 4344 T'TOU 346 5150 5246 5342 5437 5533 5629 5724 5820 5916 6011 46 44 44 45 347 6107 6203 6299 6394 6490 6586 6681 6777 6873 6968 47 45 4546 348 7064 7160 7256 7351 7447 7543 7638 7734 7830 7926 48 46 4647 349 8021 8117 8213 8308 8404 8500 8596 8691 8787 8883 49 47 47J48 1 2 3 4 5 6 7 8 9 95 9697 28 TABLE I. Log Log(l+aO Pro. Parts. X 1 2 3 4 5 6 7 8 9 95 96 97 1 350 1-368978 9074 9170 9266 9361 9457 9553 9649 9744 9840 50 48 48 49 351 9936 o031 0127 0223 0319 0414 0510 0606 0702 0797 51 48 49 49 352 37 0893 0989 1085 1180 1276 1372 1468 1563 1659 1755 52 49 50 50 353 1851 1946 2042 2138 2234 2329 2425 2521 2617 2712 53 50 51 51 354 2808 2904 3000 3095 3191 3287 3383 3479 3574 3670 54 51 52 52 355 3766 3862 3957 4053 4149 4245 4340 4436 4532 4628 55 52 53 53 356 4724 4819 4915 5011 5107 5202 5298 5394 5490 5586 56 53 54 54 357 5681 5777 5873 5969 6065 6160 6256 6352 6448 6544 57 54 55 55 358 6639 6735 6831 6927 7023 7118 7214 7310 7406 7502 58 55 56 56 359 7597 7693 7789 7885 7981 8076 8172 8268 8364 8460 59 56 57 57 360 37 8556 8651 8747 8843 8939 9035 9130 9226 9322 9418 60 57 58 58 361 9514 9610 9705 9801 9897 9993 0089 0185 0280 0376 61 58 59 59 362 38 0472 0568 0664 0760 0855 0951 1047 1143 1239 1335 62 59 60 60 363 1430 1526 1622 1718 1814 1910 2006 2101 2197 2293 63 60 60 61 364 2389 2485 2581 2677 2772 2868 2964 3060 3156 3252 64 61 61 62 365 3348 3443 3539 3635 3731 3827 3923 4019 4114 4210 65 62 62 63 366 4306 4402 4498 4594 4690 4786 4881 4977 5073 5169 66 63 63 64 367 5265 5361 5457 5553 5649 5744 5840 5936 6032 6128 67 64 64 65 368 6224 6320 6416 6512 6607 6703 6799 6895 6991 7087 68 65 65 66 369 7183 7279 7375 7471 7566 7662 7758 7854 7950 8046 69 66 66 67 370 388142 8238 8334 8430 8526 8621 8717 8813 8909 9005 70 66 67 68 371 9101 9197 9293 9389 9485 9581 9677 9772 9868 9964 71 67 68 69 372 39 0060 0156 0252 0348 0444 0540 0636 0732 0828 0924 72 68 69 70 373 1020 1115 1211 1307 1403 1499 1595 1691 1787 1883 73 69 70 71 374 1979 2075 2171 2267 2363 2459 2555 2651 2747 2842 74 70 71 72 375 2938 3034 3130 3226 3322 3418 3514 3610 3706 3802 75 71 72 73 376 3898 3994 4090 4186 4282 4378 4474 4570 4666 4762 76 72 73 74 377 4858 4954 5050 5146 5242 5338 5434 5529 5625 5721 77 73 74 75 378 5817 5913 6009 6105 6201 6297 6393 6489 6585 6681 78 74 75 76 379 6777 6873 6969 7065 7161 7257 7353 7449 7545 7641 79 75 76 77 380 39 7737 7833 7929 8025 8121 8217 8313 8409 8505 8601 80 76 77 78 381 8697 8793 8889 8985 9081 9177 9273 9369 9465 9561 81 77 78 79 382 9657 9753 9849 9945 0041 0137 0233 0329 0426 0522 82 78 79 80 -383 400618 0714 0810 0906 1002 1098 1194 1290 1386 1482 83 79 80 81 384 1578 1674 1770 1866 1962 2058 2154 2250 2346 2442 84 80 81 81 385 2538 2634 2730 2826 2922 3018 3114 3211 3307 3403 85 81 82 82 386 3499 3595 3691 3787 3883 3979 4075 4171 4267 4363 86 82 83 83 387 4459 4555 4651 4747 4843 4940 5036 5132 5228 5324 87 83 84 84 388 5420 5516 5612 5708 5804 5900 5996 6092 6188 6285 88 84 84 85 389 6381 6477 6573 6669 6765 6861 6957 7053 7149 7245 89 85 85 86 390 40 7341 7438 7534 7630 7726 7822 7918 8014 8110 8206 90 86 86 87 391 8302 8398 8495 8591 8687 8783 8879 8975 9071 9167 91 86 87 88 392 9263 9359 9456 9552 9648 9744 9840 9936 0032 0128 92 87 88 89 393 41 0224 0320 0417 0513 0609 0705 0801 0897 0993 1089 93 88 89 90 394 1186 1282 1378 1474 1570 1666 1762 1858 1955 2051 94 89 90 91 395 2147 2243 2339 2435 2531 2627 2724 2820 2916 3012 95 90 91 92 396 3108 3204 3300 3397 3493 3589 3685 3781 3877 3973 96 91 92 93 397 4070 4166 4262 4358 4454 4550 4646 4743 4839 4935 97 92 93 94 398 5031 5127 5223 5319 5416 5512 5608 5704 5800 5896 98 93 94 95 399 5993 6089 6185 6281 6377 6473 6570 6666 6762 6858 99 94 95 96 1 2 3 4 5 6 7 8 9 95 96 97 29 TABLE I. T /^. t\ i \ Pro. Log .LJ"5 ^ 1 - r*j Parts. X 1 2 3 4 5 6 7 8 9 )6 97 1-400 1-41 6954 7050 7147 7243 7339 7435 7531 7628 7724 7820 00 401 7916 8012 8108 8205 8301 8397 8493 8589 8686 8782 01 1 1 402 8878 8974 9070 9166 9263 9359 9455 9551 9647 9744 02 2 2 403 9840 9936 0032 o!28 0225 0321 o417 0513 0609 0706 03 3 3 404 42 0802 0898 0994 1090 1187 1283 1379 1475 1571 1668 04 4 4 405 1764 1860 1956 2053 2149 2245 2341 2437 2534 2630 05 5 5 406 2726 2822 2919 3015 3111 3207 3303 3400 3496 3592 06 6 6 407 3688 3785 3881 3977 4073 4170 4266 4362 4458 4554 07 7 7 408 4651 4747 4843 4939 5036 5132 5228 5324 5421 5517 08 8 8 409 5613 5709 5806 5902 5998 6094 6191 6287 6383 6479 09 9 9 410 42 6576 6672 6768 6864 6961 7057 7153 7249 7346 7442 10 10 10 411 7538 7634 7731 7827 7923 8020 8116 8212 8308 8405 11 11 11 412 8501 8597 8693 8790 8886 8982 9079 9175 9271 9367 12 12 12 413 9464 9560 9656 9753 9849 9945 0041 0138 0234 0330 13 12 13 414 43 0427 0523 0619 0715 0812 0908 1004 1101 1197 1293 14 13 14 415 1389 1486 1582 1678 1775 1871 1967 2064 2160 2256 15 14 15 416 2352 2449 2545 2641 2738 2834 2930 3027 3123 3219 16 15 16 417 3316 3412 3508 3604 3701 3797 3893 3990 4086 4182 17 16 16 418 4279 4375 4471 4568 4664 4760 4857 4953 5049 5146 18 17 17 419 5242 5338 5435 5531 5627 5724 5820 5916 6013 6109 19 18 18 420 43 6205 6302 6398 6494 6591 6687 6783 6880 6976 7072 20 19 19 421 7169 7265 7361 7458 7554 7650 7747 7843 7939 8036 21 20 20 422 8132 8229 8325 8421 8518 8614 8710 8807 8903 8999 22 21 21 423 9096 9192 9288 9385 9481 9578 9674 9770 9867 9963 23 22 22 424 44 0059 0156 0252 0349 0445 0541 0638 0734 0830 0927 -24 23 23 425 1023 1120 1216 1312 1409 1505 1601 1698 1794 1891 25 -24 24 426 1987 2083 2180 2276 2373 2469 2565 2662 2758 2854 -26 25 25 427 2951 3047 3144 3240 3336 3433 3529 3626 3722 3818 -27 26 26 428 3915 4011 4108 4204 4300 4397 4493 4590 4686 4782 28 27 27 429 4879 4975 5072 5168 5265 5361 5457 5554 5650 5747 29 28 28 430 44 5843 5939 6036 6132 6229 6325 6422 6518 6614 6711 30 29 29 431 6807 6904 7000 7097 7193 7289 7386 7482 7579 7675 31 30 30 432 7772 7868 7964 8061 8157 8254 8350 8447 8543 8639 32 31 31 433 8736 8832 8929 9025 9122 9218 9315 9411 9507 9604 33 32 32 434 9700 9797 9893 9990 0086 0183 0279 0376 0472 0568 3-t 33 33 435 45 0665 0761 0858 0954 1051 1147 1244 1340 1437 1533 35 34 34 436 1630 1726 1822 1919 2015 2112 2208 2305 2401 2498 36 35 35 437 2594 2691 2787 2884 2980 3077 3173 3270 3366 3463 37 36 36 438 3559 3655 3752 3848 3945 4041 4138 4234 4-331 4427 38 36 37 439 4524 4620 4717 4813 4910 5006 5103 5199 5296 5392 39 37 38 440 45 5489 5585 5682 5778 5875 5971 6068 6164 6261 6357 4-0 38 39 441 6454 6550 6647 6743 6840 6936 7033 7129 7226 7322 41 39 40 442 7419 7515 7612 7708 7805 7901 7998 8094 8191 8287 42 40 41 443 8384 8481 8577 8674 8770 8867 8963 9060 9156 9253 43 4-1 42 444 9349 9446 9542 9639 9735 9832 9928 0025 0121 0218 44 4-2 4-3 445 460315 0411 0508 0604 0701 0797 0894 0990 1087 1183 45 43 44 446 1280 1376 1473 1570 1666 1763 1859 1956 2052 2149 46 44 45 447 2245 2342 2439 2535 2632 2728 2825 2921 3018 3114 47 45 46 448 3211 3308 3404 3501 3597 3694 3790 3887 3983 4080 48 46 47 449 4177 4273 4370 4466 4563 4659 4756 4853 4949 5046 49147 48 1 2 3 4 5 6 7 8 9 96 97 30 TABLE I. Log Log(l+;r) Pro. Parts. X 1 2 3 4 5 6 7 8 9 6 7 1-450 465142 5239 5335 5432 5529 5625 5722 5818 5915 6011 50 8 9 451 6108 6205 6301 6398 6494 6591 6688 6784 6881 6977 51 9 9 452 7074 7170 7267 7364 7460 7557 7653 7750 7847 7943 52 453 8040 8136 8233 8330 8426 8523 8619 8716 8813 8909 53 1 1 454 9006 9102 9199 9296 9392 9489 9585 9682 9779 9875 54 2 2 455 9972 0069 0165 0262 0358 0455 0552 0648 0745 0841 55 3 3 456 47 0938 1035 1131 1228 1325 1421 1518 1614 1711 1808 56 4 4 457 1904 2001 2098 2194 2291 2387 2484 2581 2677 2774 57 5 5 458 2871 2967 3064 3160 3257 3354 3450 3547 3644 3740 58 6 6 459 3837 3934 4030 4127 4224 4320 4417 4513 4610 4707 59 7 7 460 47 4803 4900 4997 5093 5190 5287 5383 5480 5577 5673 60 8 58 461 5770 5867 5963 6060 6157 6253 6350 6447 6543 6640 61 9 59 462 6737 6833 6930 7027 7123 7220 7317 7413 7510 7607 62 60 463 7703 7800 7897 7993 8090 8187 8283 8380 8477 8573 63 61 464 8670 8767 8863 8960 9057 9153 9250 9347 9443 9540 64 61 62 465 9637 9733 9830 9927 0024 0120 0217 0314 0410 0507 65 62 63 466 48 0604 0700 0797 0894 0990 1087 1184 1281 1377 1474 66 'C 64 467 1571 1667 1764 1861 1957 2054 2151 2248 2344 2441 57 64 65 468 2538 2634 2731 ^828 2925 3021 3118 3215 3311 3408 68 65 66 469 3505 3602 3698 3795 3892 3988 4085 4182 4279 4375 69 66 67 470 48 4472 4569 4665 4762 4859 4956 5052 5149 5246 5343 70 17 68 471 5439 5536 5633 5729 5826 5923 6020 6116 6213 6310 71 68 69 472 6407 6503 6600 6697 6794 6890 6987 7084 7181 7277 72 69 70 473 7374 7471 7567 7664 7761 7858 7954 8051 8148 8245 73 70 71 474 8341 8438 8535 8632 8728 8825 8922 9019 9116 9212 74 71 72 475 9309 9406 9503 9599 9696 9793 9890 9986 0083 0180 75 72 73 476 49 0277 0373 0470 0567 0664 0760 0857 0954 1051 1148 76 ryf 74 477 1244 1341 1438 1535 1631 1728 1825 1922 2019 2115 77 74 75 478 2212 2309 2406 2502 2599 2696 2793 2890 2986 3083 78 75 76 479 3180 3277 3374 3470 3567 3664 3761 3857 3954 4051 79 76 77 480 494148 4245 4341 4438 4535 4632 4729 4825 4922 5019 80 i 78 481 5116 5213 5309 5406 5503 5600 5697 5793 5890 5987 81 78 79 482 6084 6181 6278 6374 6471 6568 6665 6762 6858 6955 82 '9 80 483 7052 7149 7246 7342 7439 7536 7633 7730 7827 7923 83 80 81 484 8020 8117 8214 8311 8408 8504 8601 8698 8795 8892 84 81 81 485 8989 9085 9182 9279 9376 9473 9569 9666 9763 9860 85 82 82 486 9957 0054 o!51 0247 0344 0441 0538 0635 0732 0828 86 83 83 487 50 0925 1022 1119 1216 1313 1409 1506 1603 1700 1797 87 84 84 488 1894 1991 2087 2184 2281 2378 2475 2572 2669 2765 88 84 8*5 489 2862 2959 3056 3153 3250 3347 3443 3540 3637 3734 89 85 86 490 503831 3928 4025 4122 4218 4315 4412 4509 4606 4703 90 86 87 491 4800 4896 4993 5090 5187 5284 5381 5478 5575 567 91 87 88 492 5768 5865 5962 6059 6156 6253 6350 6447 6543 6640 92 88 89 493 6737 6834 6931 7028 7125 7222 7319 7415 7512 7609 93 89 90 494 7706 7803 7900 7997 8094 8191 8287 8384 848 8578 94 90 91 495 8673 8772 8869 8966 9063 9160 9256 9353 9450 954 95 9 92 496 9644 974 9838 993o 0032 o!29 0226 0322 o41 051 96 92 93 497 51 0612 0710 0807 0904 1001 109S 1195 1292 138 148 9 93 94 498 1585 167 1776 1873 1970 206 r 2164 226 235 245 9 94 95 499 255$ 264 2745 2842 2939 3036 3132 3230 332 342 9 9 96 1 2 3 4 5 6 7 8 9 9 97 TABLE I. Log Log (1+a) Pro. Parts. X 1 2 3 4 5 6 7 8 9 97 98 1-500 1-513521 3618 3715 3812 3909 4006 4103 4199 4296 4393 00 501 4490 4587 4684 4781 4878 4975 5072 5169 5266 5363 01 1 1 502 5460 5557 5654 5751 5848 5945 6041 6138 6235 6332 02 2 2 503 6429 6526 6623 6720 6817 6914 7011 7108 7205 7302 03 2 504- 7399 7496 7593 7690 7787 7884 7981 8078 8175 8272 04 4 4 505 8369 8465 8562 8659 8756 8853 8950 9047 9144 9241 05 I K 506 9338 9435 9532 9629 9726 9823 9920 0017 0114 0211 06 6 6 507 52 0308 0405 0502 0599 0696 0793 0890 0987 1084 1181 07 r i 7 508 1278 1375 1472 1569 1666 1763 1860 1957 2054 2151 08 S 8 509 2248 2345 2442 2539 2636 2733 2830 2927 3024 3121 09 c 510 523218 3315 3412 3509 3606 3703 3800 3897 3994 4091 10 10 10 511 4188 4285 4382 4479 4576 4673 4770 4867 4964 5061 11 11 11 512 5158 5255 5352 5449 5546 5643 5740 5837 5934 6031 12 12 12 513 6128 6225 6322 6419 6516 6613 6710 6807 6904 7001 13 13 I ^ 514 7098 7195 7292 7390 7487 7584 7681 7778 7875 7972 14 14 14 515 8069 8166 8263 8360 8457 8554 8651 8748 8845 8942 15 15 15 516 9039 9136 9233 9330 9427 9524 9621 9718 9815 9913 16 16 16 517 530010 0107 0204 0301 0398 0495 0592 0689 0786 0883 17 16 17 518 0980 1077 1174 1271 1368 1465 1562 1660 1757 1854 18 17 18 519 1951 2048 2145 2242 2339 2436 2533 2630 2727 2824 19 18 19 520 53 2921 3018 3115 3213 3310 3407 3504 3601 3698 3795 20 19 20 521 3892 3989 4086 4183 4280 4377 4475 4572 4669 4766 21 20 21 522 4863 4960 5057 5154 5251 5348 KJ,1C (LlTTTtJ 5542 5640 5737 22 21 22 523 5834 5931 6028 6125 6222 6319 6416 6513 6610 6708 23 22 23 524 6805 6902 6999 7096 7193 7290 7387 7484 7581 7678 24 23 24 525 7776 7873 7970 8067 8164 8261 8358 8455 8552 8650 25 24 25 526 8747 8844 8941 9038 9135 9232 9329 9426 9524 9621 26 25 25 527 9718 9815 9912 0009 0106 0203 0300 0398 0495 0592 27 26 26 528 54 0689 0786 0883 0980 1077 1175 1272 1369 1466 1563 28 27 27 529 1660 1757 1854 1952 2049 2146 2243 2340 2437 2534 29 28 28 530 54 2631 2729 2826 2923 3020 3117 3214 3311 3409 3506 30 29 29 531 3603 3700 3797 3894 3991 4089 4186 4283 4380 4477 31 30 30 532 4574 4671 4769 4866 4963 5060 5157 5254 5351 5449 32 31 31 533 5546 5643 5740 5837 5934 6032 6129 6226 6323 6420 33 32 32 534- 6517 6614 6712 6809 6906 7003 7100 7197 7295 7392 34 33 33 535 7489 7586 7683 7780 7878 7975 8072 8169 8266 8363 35 34 34 536 8461 8558 8655 8752 8849 8946 9044 9141 9238 9335 36 35 35 537 9432 9530 9627 9724 9821 9918 0015 0113 0210 0307 37 36 36 538 55 0404 0501 0599 0696 0793 0890 0987 1084 1182 1279 38 37 37 539 1376 1473 1570 1668 1765 1862 1959 2056 2154 2251 39 38 38 54-0 55 2348 2445 2542 2640 2737 2834 2931 3028 3126 3223 40 39 39 541 3320 3417 3514 3612 3709 3806 3903 4000 4098 4195 41 40 40 542 4292 4389 4486 4584 4681 4778 4875 4973 5070 5167 42 41 41 543 5264 5361 5459 5556 5653 5750 5847 5945 6042 6139 43 42 42 544 6236 6334 6431 6528 6625 6722 6820 6917 7014 7111 44 43 43 545 7209 7306 7403 7500 7598 7695 7792 7889 7986 8084 45 44 44 546 8181 8278 8375 8473 8570 8667 8764 8862 8959 9056 46 45 45 547 9153 9251 9348 9445 9542 9639 9737 9834 9931 0028 47 46 46 548 560126 0223 0320 0417 0515 0612 0709 0806 0904 1001 48 47 47 549 1098 1195 1293 1390 1487 1584 1682 1779 1876 1974. 49 48 48 1 2 3 4 5 6 7 8 9 97 98 32 TABLE I. Log Log (1+9) Pro. Parts. X 1 2 3 4 5 6 7 8 9 97 98 1-550 1-562071 2168 2265 2363 2460 2557 2654 2752 2849 2946 50 49 49 551 3043 3141 3238 3335 3432 3530 3627 3724 3822 3919 51 49 50 552 4016 4113 4211 4308 4405 4502 4600 4697 4794 4892 52 50 51 553 4989 5086 5183 5281 5378 5475 5572 567C 5767 5864 53 51 52 554 5962 6059 6156 6253 6351 6448 6545 6643 6740 6837 54 52 53 555 6934 7032 7129 7226 7324 7421 7518 7616 7713 7810 55 53 5* 556 7907 8005 8102 8199 8297 8394 849 858S 8686 8783 56 54 55 557 8880 8978 9075 9172 9270 9367 9464 9562 9659 9756 57 5o 56 558 9853 9951 0048 0145 0243 0340 0437 0535 0632 0729 58 56 57 559 57 0827 0924 1021 1118 1216 1313 1410 150S 1605 1702 59 57 58 560 57 1800 1897 1994 2092 2189 2286 2384 248 2578 2676 ao 58 59 561 2773 2870 2968 3065 3162 3260 3357 3454 3552 3649 61 59 60 562 3746 3844 3941 4038 4136 4233 4330 4428 4525 4622 6260 61 563 4720 4817 4914 5012 5109 5206 5304 540 5498 5596 63 6 62 564 5693 5790 5888 5985 6082 6180 6277 6374 6472 6569 64 62 63 565 6666 6764 6861 6958 7056 7153 7251 7348 7445 7543 65 63 64 566 7640 7737 7835 7932 8029 8127 8224 832 8418 8516 6664 65 567 8614 8711 8808 8906 9003 9100 9198 9295 9392 9490 67 65 66 568 9587 9685 9782 9879 9977 0074 0171 026S 0366 0464 68 66 67 569 580561 0658 0756 0853 0950 1048 1145 1243 1340 1437 69 67 68 570 58 1535 1632 1729 1827 192"4 2022 2119 2216 2314 2411 70 68 69 571 2508 2606 2703 2801 2898 2995 3093 3190 3288 3385 71 69 70 572 3482 3580 3677 3775 3872 3969 4067 4164 4261 4359 72 70 71 573 4456 4554 4651 4748 4846 4943 5041 5138 5235 5333 73 71 72 574 5430 5528 5625 5722 5820 5917 6015 6112 6210 6307 74 72 73 575 6404 6502 6599 6697 6794 6891 6989 7086 7184 7281 75 73 73 576 7378 7476 7573 7671 7768 7866 7963 8060 8158 8255 76 74 74 577 8353 8450 8547 8645 8742 8840 8937 9035 9132 9229 77 75 75 578 9327 9424 9522 9619 9717 9814 9911 0009 0106 0204 78 76 76 579 590301 0399 0496 0593 0691 0788 0886 0983 1081 1178 79 77 77 580 59 1275 1373 1470 1568 1665 1763 1860 1958 2055 2152 80 78 78 58 i 2250 2347 2445 2542 2640 2737 2835 2932 3029 3127 81 79 79 582 3224 3322 3419 3517 3614 3712 3809 3906 4004 4101 82 80 80 583 4199 4296 4394 4491 4589 4686 4784 4881 4978 5076 83 81 81 584 5173 5271 5368 5466 5563 5661 5758 5856 5953 6051 84 81 82 585 6148 6246 6343 6440 6538 6635 6733 C830 6928 7025 85 82 83 586 7123 7220 7318 7415 7513 7610 7708 7805 7903 8000 86 83 84 587 8097 8195 8292 8390 8487 8585 8682 8780 8877 8975 87 84 85 588 9072 9170 9267 9365 9462 9560 9657 9755 9852 9950 88 85 86 589 60 0047 0145 0242 0340 0437 0535 0632 0730 0827 0925 89 86 87 590 60 1022 1120 1217 1315 1412 1510 1607 1705 1802 1900 90 87 88 591 1997 2094 2192 2290 2387 2485 2582 2680 2777 2875 91 88 89 592 2972 3070 3167 3265 3362 3460 3557 3655 3752 3850 92 B9 90 593 3947 4045 4142 4240 4337 4435 4532 4630 4727 4825 93 90 91 594 4922 5020 5117 5215 5312 5410 5507 5605 5702 5800 94 91 92 595 5897 5995 6092 6190 6288 6385 6483 6580 6678 6775 95 92 93 596 6873 6970 7068 7165 7263 7360 7458 7555 7653 7750 96 93 94 597 7848 7946 8043 8141 8238 8336 8433 8531 8628 8726 97 34 95 598 8823 8921 9018 9116 9214 9311 9409 9506 9604 9701 98 )5 96 599 9799 9896 9994 0091 0189 0286 0384 0482 0579 0677 9 )6 97 1 2 3 4 5 6 7 8 9 i ?7 8 33 TABLE I. Log Log (1+ar) Pro. Parts. X 1 2 3 4 5 6 7 8 9 97 98 1-600 1-61 0774 0872 0969 1067 1164 1262 1360 1457 1555 1652 00 601 1750 1847 1945 2042 2140 2238 2335 2433 2530 2628 01 1 1 602 2725 2823 2920 3018 3116 3213 3311 3408 3506 3603 02 2 2 603 3701 3799 3896 3994 4091 4189 4286 4384 4482 4579 03 2 3 604 4677 4774 4872 4969 5067 5165 5262 5360 5457 5555 04 4 4 605 5652 5750 5848 5945 6043 6140 6238 6335 6433 6531 05 K 5 606 6628 6726 6823 6921 7019 7116 7214 7311 7409 7506 06 6 6 607 7604 7702 7799 7897 7994 8092 8190 8287 8385 8482 n^7 7 7 608 8580 8678 8775 8873 8970 9068 9166 9263 9361 9458 08 8 8 609 9556 9654 9751 9849 9946 0044 o!42 0239 0337 0434 09 9 9 610 62 0532 0630 0727 0825 0922 1020 1118 1215 1313 1410 10 10 10 611 1508 1606 1703 1801 1898 1996 2094 2191 2289 2386 11 11 11 612 2484 2582 2679 2777 2875 2972 3070 3167 3265 3363 12 12 12 613 3460 3558 3656 3753 3851 3948 4046 4144 4241 4339 13 13 13 614 4437 4534 4632 4729 4827 4925 5022 5120 5218 5315 14 14 14 615 5413 5510 5608 5706 5803 5901 5999 6096 6194 6291 15 15 15 616 6389 6487 6584 6682 6780 6877 6975 7073 7170 7268 16 16 16 617 7366 7463 7561 7658 7756 7854 7951 8049 8147 8244 17 16 17 618 8342 8440 8537 8635 8733 8830 8928 9026 9123 9221 18 17 18 619 9318 9416 9514 9611 9709 9807 9904 0002 olOO 0197 19 1! 19 620 63 0295 0393 0490 0588 0686 0783 0881 0979 1076 1174 2019 20 621 1272 1369 1467 1565 1662 1760 1858 1955 2053 2151 2120 21 622 2248 2346 2444 2541 2639 2737 2834 2932 3030 3127 2221 22 623 3225 3323 3420 3518 3616 3713 3811 3909 4006 4104 2322 23 624 4202 4299 4397 4495 4592 4690 4788 4885 4983 5081 24|23 24 625 5179 5276 5374 5472 5569 5667 5765 5862 5960 6058 25 24 25 626 6155 6253 6351 6448 6546 6644 6742 6839 6937 7035 26 25 25 627 7132 7230 7328 7425 7523 7621 7718 7816 7914 8012 27 26 26 628 8109 8207 8305 8402 8500 8598 8695 8793 8891 8989 28 27 27 629 9086 9184 9282 9379 9477 9575 9673 9770 9868 9966 29 28 28 630 64 0063 0161 0259 0356 0454 0552 0650 0747 0845 0943 30 29 29 631 1040 1138 1236 1334 1431 1529 1627 1724 1822 1920 31 30 30 632 2018 2115 2213 2311 2409 2506 2604 2702 2799 2897 32 31 31 633 2995 3093 3190 3288 3386 3484 3581 3679 3777 3874 33 32 32 634 3972 4070 4168 4265 4363 4461 4559 4656 4754 4852 34 33 33 635 4949 5047 5145 5243 5340 5438 5536 5634 5731 5829 35|34 34 636 5927 6025 6122 6220 6318 6416 6513 6611 6709 6807 3635 35 637 6904 7002 7100 7198 7295 7393 7491 7589 7686 7784 37|36 36 638 7882 7980 8077 8175 8273 8371 8468 8566 8664 8762 38 37 37 639 8859 8957 9055 9153 9250 9348 9446 9544 9641 9739 39 38 38 640 64 9837 9935 0032 0130 0228 0326 0423 0521 0619 0717 40 39 39 641 650814 0912 1010 1108 1206 1303 1401 1499 1597 1694 41 40 40 642 1792 1890 1988 2085 2183 2281 2379 2477 2574 2672 42 41 41 643 2770 2868 2965 3063 3161 3259 3357 3454 3552 3650 43 42 42 644 3748 3845 3943 4041 4139 4237 4334 4432 4530 4628 44 43 43 645 4726 4823 4921 5019 5117 5214 5312 5410 5508 5606 45 44 44 646 5703 5801 5899 5997 6095 6192 6290 6388 6486 6584 46 45 45 647 6681 6779 6877 6975 7073 7170 7268 7366 7464 7562 47 46 46 648 7659 7757 7855 7953 8051 8148 8246 8344 8442 8540 48 47 47 649 8637 8735 8833 8931 9029 9126 9224 9322 9420 9518 49 48 48 1 2 3 4 5 6 ~7~ 8 9 97 98 34 TABLE I. Log Log(H-) Pro. Parts. X 1 2 3 4 5 6' 7 8 9 97 98 1-650 1-659615 9713 9811 9909 0007 o!04 0202 0300 0398 0496 50 49 49 651 66 0594 0691 0789 0887 0985 1083 1180 1278 1376 1474 51 49 50 652 1572 1670 1767 1865 1963 2061 2159 2256 2354 2452 52 50 51 653 2550 2648 2746 2843 2941 3039 3137 3235 3333 3430 53 51 52 654 3528 3626 3724 3822 3920 4017 4115 4213 4311 4409 54 52 53 655 4507 4604 4702 4800 4898 4996 5094 5191 5289 5387 55 53 54 656 5485 5583 5681 5778 5876 5974 6072 6170 6268 6365 56 54 55 657 6463 6561 6659 6757 6855 6953 7050 7148 72 86 988 2442 2541 2640 2739 2838 2937 3036 3135 3234 3333 6886187 989 3432 3531 3630 3729 3828 3927 4026 4125 4224 4323 89 87:88 990 99 4422 4521 4619 4718 4817 4916 5015 5114 5213 5312 90 88189 991 5411 5510 5609 5708 5807 5906 6005 6104 6203 6302 91 8990 992 6401 6500 6599 6698 6797 6896 6995 7094 7193 7292 92 9091 993 7391 7490 7589 7688 7787 7886 7985 8084 8183 8282 93 91192 994 8381 8480 8579 8678 8777 8876 8975 9074 9173 9272 94 92 93 995 9371 9470 9569 9668 9767 9866 9965 0064 0163 0262 95 93 94 996 2-000361 0460 0559 0658 0757 0856 0955 1054 1153 1252 96 94 95 997 1351 1450 1549 1648 1747 1846 1945 2044 2143 2242 97 95 96 998 2341 2440 2539 2638 2737 2836 2935 3034 3133 3232 98 96 97 'QC 999 3331 3430 3529 3628 3727 3826 3925 4024 4123 4222 99 97 98 1 2 3 4 5 6 7 8 9 98 99 41 TABLE II. TABLE II. Log Log (1*) X 1 2 3 4 5 6 7 8 9 D. 3-00 I 99 9565 9564 9563 9562 9561 9560 9559 9558 9557 9556 i 01 9555 9554 9553 9552 9551 9550 9549 9548 9547 9546 02 9545 9544 9543 9542 9541 9540 9539 9538 9537 9535 03 9534 9533 9532 9531 9530 9529 9528 9527J 9526 9525 04 9524 9522 9521 9520 9519 9518 9517 9516 9515 9514 05 9512 9511 9510 9509 9508 9507 9506 9505 9503 9502 06 9501 9500 9499 9498 9496 9495 9494 9493 9492 9491 07 9489 9488 9487 9486 9485 9484 9482 9481! 9480 9479 08 9478 9476 9475 9474 9473 9471 9470 9469 9468 9467 09 9465 9464 9463 9462 9460 9459 9458 9457 9455 9454 10 99 9453 9452 9450 9449 9448 9447 9445 9444 9443 9441 11 9440 9439 9438 9436 9435 9434 9432 9431 9430 9428 12 9427 9426 9424 9423 9422 9420 9419 9418 9416 9415 13 9414 9412 9411 9410 9408 9407 9406 9404 9403 9401 14 9400 9399 9397 9396 9395 9393 9392 9390 9389 9388 15 9386 9385 9383 9382 9380 9379 9378 9376 9375 9373 16 9372 9370 9369 9367 9366 9365 9363 9362 9360 9359 17 9357 9356 9354 9353 9351 9350 9348 9347 9345 9344 2 18 9342 9341 9339 9338 9336 9335 9333 9331 9330 9328 19 9327 9325 9324 9322 9321 9319 9317 9316 9314 9313 20 999311 9310 9308 9306 9305 9303 9302 9300 9298 9297 21 9295 9293 9292 9290 9289 9287 9285 9284 9282 9280 22 9279 9277 9275 9274 9272 9270 9269 9267 9265 9264 23 9262 9260 9258 9257 9255 9253 9252 9250 9248 9246 24 9245 9243 9241 9239 9238 9236 9234 9232 9231 9229 25 9227 9225 9223 9222 9220 9218 9216 9214 9213 9211 26 9209 9207 9205 9204 9202 9200 9198 9196 9194 9192 27 9191 9189 9187 9185 9183 9181 9179 9177 9175 9174 28 9172 9170 9168 9166 9164 9162 9160 9158 9156 9154 29 9152 9150 9148 9146 9145 9143 9141 9139 9137 9135 30 99 9133 9131 9129 9127 9125 9123 9121 9118 9116 9114 31 9112 9110 9108 9106 9104 9102 9100 9098 9096 9094 32 9092 9090 9087 9085 9083 9081 9079 9077 9075 9073 33 9071 9068 9066 9064 9062 9060 9058 9055 9053 9051 34 9049 9047 9044 9042 9040 9038 9036 9033 9031 9029 35 9027 9024 9022 9020 9018 9015 9013 9011 9009 9006 36 9004 9002 8999 8997 8995 8992 8990 8988 8985 8983 37 8981 8978 8976 8974 8971 8969 8967 8964 8962 8959 38 8957 8955 8952 8950 8947 8945 8942 8940 8938 8935 39 8933 8930 8928 8925 8923 8920 8918 8915 8913 8910 3 40 99 8908 8905 8903 8900 8898 8895 8893 8890 8887 8885 41 8882 8880 8877 8874 8872 8869 8867 8864 8861 8859 42 8856 8854 8851 8848 8846 8843 8840 8838 8835 8832 43 8830 8827 8824 8821 8819 8816 8813 8810 8808 8805 44 8802 8799 8797 8794 8791 8788 8786 8783 8780 8777 45 8774 8771 8769 8766 8763 8760 8757 8754 8751 8749 46 8746 8743 8740 8737 8734 8731 8728 8725 8722 8719 47 8716 8713 8710 8707 8705 8702 8699 8696 8693 8689 48 8686 8683 8680 8677 8674 8671 8668 8665 8662 8659 49 8656 8653 8650 8646 8643 8640 8637 8634 8631 8628 1 2 3 4 5 6 7 8 9 D. 43 TABLE II. Log Log (1 a-) X 1 2 3 4 5 6 7 8 9 D. 3-50 1-99 8624 8621 8618 8615 8612 8609 8605 8602 8599 8596 51 8592 8589 8586 8583 8579 8576 8573 8569 8566 8563 52 8560 8556 8553 8550 8546 8543 8539 8536 8533 8529 53 8526 8523 8519 8516 8512 8509 8505 8502 8498 8495 54 8492 8488 8485 8481 8478 8474 8471 8467 8463 8460 4 55 8456 8453 8449 8446 8442 8438 8435 8431 8428 8424 56 8420 8417 8413 8409 8406 8402 8398 8395 8391 8387 57 8383 8380 8376 8372 8368 8365 8361 8357 8353 8350 58 8346 8342 8338 8334 8330 8327 8323 8319 8315 8311 59 8307 8303 8299 8295 8291 8287 8284 8280 8276 8272 60 99 8268 8264 8260 8256 8252 8247 8243 8239 8235 8231 61 8227 8223 8219 8215 8211 8207 8202 8198 8194 8190 62 8186 8182 8177 8173 8169 8165 8160 8156 8152 8148 63 8143 8139 8135 8131 8126 8122 8118 8113 8109 8104 64 8100 8096 8091 8087 8082 8078 8074 8069 8065 8060 65 8056 8051 8047 8042 8038 8033 8029 8024 8020 8015 5 66 8010 8006 8001 7997 7992 7987 7983 7978 7973 7969 67 7964 7959 7954 7950 7945 7940 7935 7931 7926 7921 68 7916 7912 7907 7902 7897 7892 7887 7882 7878 7873 69 7868 7863 7858 7853 7848 7843 7838 7833 7828 7823 70 99 7818 7813 7808 7803 7798 7793 7787 7782 7777 7772 71 7767 7762 7757 7751 7746 7741 7736 7731 7725 7720 72 7715 7710 7704 7699 7694 7688 7683 7678 7672 7667 73 7661 7656 7651 7645 7640 7634 7629 7623 7618 7612 74 7607 7601 7596 7590 7585 7579 7573 7568 7562 7557 3 75 7551 7545 7540 7534 7528 7522 7517 7511 7505 7499 76 7494 7488 7482 7476 7470 7465 7459 7453 7447 7441 77 7435 7429 7423 7417 7411 7405 7399 7393 7387 7381 78 7375 7369 7363 7357 7351 7345 7339 7332 7326 7320 79 7314 7308 7301 7295 7289 7283 7276 7270 7264 7257 .80 99 7251 7245 7238 7232 7226 7219 7213 7206 7200 7193 81 7187 7180 7174 7167 7161 7154 7148 7141 7134 7128 7 82 7121 7114 7108 7101 7094 7088 7081 7074 7067 7061 83 7054 7047 7040 7033 7026 7020 7013 7006 6999 6992 84 6985 6978 6971 6964 6957 6950 6943 6936 6929 6922 85 6914 6907 6900 6893 6886 6879 6871 6864 6857 6850 86 6842 6835 6828 6820 6813 6806 6798 6791 6783 6776 87 6769 6761 6754 6746 6739 6731 6723 6716 6708 6701 8 88 6693 6685 6678 6670 6662 6655 6647 6639 6631 6623 89 6616 6608 6600 6592 6584 6576 6568 6560 6552 6544 90 99 6537 6528 6520 6512 6504 6496 6488 6480 6472 6464 91 6455 6447 6439 6431 6423 6414 6406 6398 6389 6381 92 6373 6364 6356 6347 6339 6330 6322 6313 6305 6296 1 93 6288 6279 6271 6262 6253 6245 6236 6227 6218 6210 94 6201 6192 6183 6174 6166 6157 6148 6139 6130 6121 95 6112 6103 6094 6085 6076 6067 6058 6049 6040 6030 96 6021 6012 6003 5993 5984 5975 5965 5956 5947 5937 97 5928 5918 5909 5900 5890 5881 5871 5861 5852 5842 98 5833 5823 5813 5804 5794 5784 5774 5765 5755 5745 99 5735 5725 5715 5705 5695 5685 5675 5665 5655 5645 1 2 3 4 5 6 7 8 9 ). 44 TABLE II. Log Lpg(l-) Biff. Pro. Parts. i" 1 1 2 2 3 3 4 4 5 6 6 7 7 8 8 9 910 12 1 2 4 5 6 7 8 10 11 13 I 3 4 5 7 8 9 10 12 X 1 2 3 5615 5605 5512 5502 5407! 5397 5300; 5289 5190 5178 5077 5065 4961 4950 4843 4831 4723 4710 4599| 4586 4 5 6 7 8 9 2-00 01 02 03 04 05 06 07 08 09 1-99 5635 5533 5428 5321 5212 5100 4985 4867 4747 4624 5625 5523 5418 5310 5201 5088 4973 4855 4735 4611 5595 5491 5386 5278 5167 5054 4938 4820 4698 4574 5584 5481 5375 5267 5156 5043 4926 4807 4686 4561 5574 5471 5364 5256 5145 5031 4915 4795 4673 4549 5564 5460 5354 5245 5134 5019 4903 4783 4661 4536 5554 5450 5343 5234 5122 5008 4891 4771 4649 4523 5543 5439 5332 5223 5111 4996 4879 4759 4636 4511 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 3 i i 2 3 3 4 4 6 5 7 6 8 7 10 811 913 15,16 "11 5 5 6 6 8 8 910 nil 1213 1414 10 11 12 13 14 15 16 1? 18 19 99 4498 4369 4237 4102 3963 3822 3677 3528 3376 3221 4485 4356 4223 4088 3949 3807 3662 3513 3361 3205 4472 4343 4210 4074 3935 3793 3647 3498 3346 3189 4459 4330 4197 4060 3921 3779 3633 3483 3330 3174 4447 4316 4183 4047 3907 3764 3618 3468 3315 3158 4434 4303 4170 4033 3893 3750 3603 3453 3299 3142 4421 4290 4156 4019 3879 3735 3588 3438 3284 3126 4408 4277 4143 4005 3865 3721 3573 3422 3268 3110 4395 4263 4129 3991 3850 3706 3558 3407 3252 3094 4382 4250 4115 3977 3836 3691 3543 3392 3237 3078 17J1819 1 222 2 3' 4 ! 4 3 5! 5 6 47 78 5 9 910 6 1011 11 7 121313 8141415 9 15116 17 20 21 22 23 24 25 26 27 28 29 99 3062 2899 2732 2561 2386 2208 2024 1837 1645 1448 3046 2882 2715 2544 2369 2189 2006 1818 1625 1428 3029 2866 2698 2527 2351 2171 1987 1799 1606 1408 3013 2849 2681 2509 2333 2153 1969 1780 1586 1388 2997 2833 2664 2492 2315 2135 1950 1761 1567 1368 2981 2816 2647 2474 2298 2116 1931 1741 1547 1348 2964 2799 2630 2457 2280 2098 1912 1722 1527 1328 2948 2782 2613 2439 2262 2080 1894 1703 1508 1308 2932 2766 2596 2422 2244 2061 1875 1684 1488 1288 2915 2749 2579 2404 2226 2043 1856 1664 1468 1267 20 1 2 2 4 3 6 4 8 5 10 612 7 14 8 16 9 is 2122 2~2 4 4 6 7 8 9 11 11 1313 1515 1718 1920 30 31 32 33 34 35 36 37 38 39 99 1247 1041 0830 0614 0393 0167 98 9935 9698 9455 9206 1227 1020 0809 0592 0371 0144 9912 9674 9430 9181 1206 0999 0787 0570 0348 0121 9888 9650 9406 9156 1186 0978 0766 0549 0326 0098 9865 9626 9381 9131 1165 0957 0744 0526 0303 0075 9841 9601 9356 9105 1145 0936 0723 0504 0281 0052 9817 9577 9331 9080 1124 1103 0915 0894 070 1| 0680 0482 0460 0258 0235 0029 0005 9793 9770 9553 9528 9307 9282 9054 9029 1083 0873 0658 0438 0213 9982 9746 9504 9257 9003 1062 0851 0636 0416 0190 9959 9722 9480 9231 8977 23 1|2 2 5 3 7 4 9 512 6 14 716 818 921 26 3 2 1 5 3 8 410 5 13 616 7'18 821 923 24 12 5 7 10 12 14 7 19 22 mmm 27 3 5 8 11 14 16 19 22 24 25 1 5 8 10 13 15 18 20 23 28 3 6 8 11 14 17 20 22 25 40 41 42 43 44 45 46 47 48 49 98 8952 8691 8424 8151 7871 7584 7291 6990 6682 6367 8926 8665 8397 8123 7842 7555 7261 6960 6651 6335 8900 8638 8370 8095 7814 7526 7231 6929 6620 6303 8874 8612 8343 8067 7785 7497 7201 6899 6589 6271 8848 8585 8315 8039 7757 7468 7171 6868 6557 6239 8822 8558 8288 8012 7728 7438 7141 6837 6526 6207 8796 8532 8261 7983 7700 7409 7111 6806 6494 6175 8770 8505 8233 7955 7671 7379 7081 6776 6463 6142 8744 8478 8206 7927 7642 7350 7051 6745 6431 6110 8717 8451 8178 7899 7613 7320 7020 6714 6399 6077 1 2 3 4 5 6 7 8 9 Diff. Pro. Parts. TABLE II. Log X Log(l~*) Diff Pro. Parts. 1 6012 5681 5341 4994 4638 4274 3901 3518 3127 2726 2 3 4 5 6 7 8 9 | 29 3 6 9 12 15 17 20 i 3C 3 e 12 15 16 21 24 27 31 f 12 16 19 22 M 2-50 51 52 53 54 55 56 57 58 59 T-98 6045 5714 5376 5029 4674 4311 3938 3557 3167 2767 5979 5647 5307 4959 4602 4237 3863 3480 3087 2685 5946 5613 5273 4923 4566 4200 3825 3441 3048 2645 5913 5580 5238 4888 4530 4163 3787 3402 3008 2604 5880 5546 5203 4853 4493 4126 3749 3363 2968 2563 5847 5512 5169 4817 4457 4088 3711 3324 2928 2522 5814 5478 5134 478 442 405 367 f 328c 2886 248 5781 5444 5099 4746 4384 4014 3634 3245 2847 2440 5747 5410 5064 4710 4347 3976 3596 3206 2807 2398 34 35 36 37 38 39 40 41 42 43 44 45 46 47 49 50 51 52 53 55 56 58 59 60 62 63 65 67 68 70 72 73 75 77 79 81 83 85 87 90 92 94 97 99 102 104 107 109 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 32 c 6 10 13 16 IP 22 26 29 33 3 7 10 13 17 20 23 26 30 34 1 14 5 27 31 60 61 62 63 64 65 66 67 68 69 98 2357 1937 1507 1067 0616 0154 97 9681 9196 8699 8191 2315 1895 1464 1023 0570 0107 9633 9147 8649 8139 2274 1852 1420 0978 0525 0060 9585 9098 8599 8087 2232 1809 1376 0933 0479 0013 9537 9048 8548 8036 2190 1767 1333 0888 0433 9966 9488 8999 8497 7984 2148 1724 1289 0843 0387 9919 9440 8949 8447 7932 2106 1681 1245 0798 0340 9872 9391 8900 8396 7879 2064 163 r 120C 0753 0294 9824 9343 8850 834o 7827 2022 1594 1156 0707 0247 9776 9294 8800 8293 7775 1980 155 1112 0662 0201 9729 9245 8750 8242 7722 1 2 3 4 5 6 7 8 9 35 4 7 11 14 18 21 25 28 32 36 4 7 11 14 18 22 25 29 32 37 1 19 22 26 30 33 70 71 72 73 74 75 76 77 78 79 97 7669 7135 6588 6027 5453 4864 4261 3643 3010 2361 7616 7081 6533 5971 5395 4805 4200 3580 2945 2295 7564 7027 6477 5914 5336 4745 4139 3518 2881 2229 7510 6972 6421 5856 5278 4685 4077 3455 2816 2163 7457 6918 6365 5799 5219 4625 4016 3391 2752 2096 7404 6863 6309 5742 5160 4564 3454 3328 2687 2030 7350 6809 6253 5684 5101 4504 3892 3265 2622 1963 7297 6754 6197 5627 5042 4,J./Lt 7243 6699 6141 5569 4983 4383 3768 3137 2492 1830 7189 6643 6084 5511 4924 4322 3706 3074 2426 1763 38 39 40 3830 3201 2557 1896 1 2 3 4 5 6 7 8 9 4 8 11 15 19 23 27 30 34 4 8 12 16 20 23 27 31 35 8 12 16 20 24 28 32 36 80 81 82 83 .84 85 86 87 88 89 97 1695 1013 0315 96 9598 8864 8112 7340 6550 5739 4908 1628 0944 0244 9526 8790 8035 7262 6469 5657 4823 1560 0875 0173 9453 8715 7959 7184 6389 5574 4739 1492 0806 0102 9380 8640 7882 7105 6308 5492 4654 1424 0736 0030 9307 8565 7805 7026 6228 5409 4569 1356 0666 9959 9234 8490 7728 6947 6147 5326 4484 1288 0596 9887 9160 8415 7651 6868 6065 5243 4399 1220 0526 9815 9086 8339 7574 6789 5984 5159 4313 1151 0456 9743 9013 8264 7496 6709 5903 5076 4228 1082 0385 9671 8939 8188 7418 6629 5821 4992 4142 1 2 3 4 5 6 7 8 9 41 4 8 12 16 21 25 29 33 37 42 4 8 13 17 21 25 29 34 38 43 4 c 13 17 22 26 30 34 39 90 91 92 93 94 95 96 97 98 99 96 4055 3182 2286 1367 0425 95 9459 8468 7451 6409 5340 3969 3093 2195 1274 0329 9361 8367 7348 6303 5231 3882 3004 2104 1181 0234 9263 8267 7245 6197 5122 3796 2915 2013 1087 0138 9164 8166 7141 6091 5013 3709 2826 1921 0993 0041 9065 8064 7038 5985 4904 3621 2737 1829 0899 9945 8966 7963 6933 5878 4794 3534 2647 1737 0805 9848 8867 7861 6829 5771 4685 3446 2557 1645 0710 9751 8768 7759 6725 5663 4574 3358 2467 1553 0615 9654 8668 7657 6620 5556 4464 3270 2376 1460 0520 9556 8568 7554 6514 5448 4353 1 2 3 4 5 6' 7; SL 94 44 4 9 13 18 22 16 $1 55; to^ 45 5 9 14 18 23 >7 J2 56 H 46 5 9 14 18 23 28 32 J7 I! 1 2 3 4 5 6 7 8 9 Diff. Pr. Parts. 46 PROPORTIONAL PARTS. 46 47 48 49 50 51 52 53 54 55 56 57 H 1 5 5 5 5 5 5 5 5 5 6 6 6 6 2 9 9 10 10 10 10 10 11 11 11 11 11 12 3 14 14 14 15 15 15 16 16 16 17 17 17 17 4 18 19 19 20 20 20 21 21 22 22 22 23 23 5 23 24 24 25 25 26 26 27 27 28 28 29 29 6 28 28 29 29 30 31 31 32 32 33 34 34 35 7 32 33 34 34 35 36 36 37 38 39 39 40 41 8 37 38 38 39 40 41 42 42 43 44 45 46 46 9 41 42 43 44 45 46 47 48 49 50 50 51 52 59 ~T 60 61 62 63 64 65 66 67 68 69 70 71 2 3 o 12 18 12 18 12 18 12 19 13 19 13 19 13 20 13 20 13 20 14 20 14 21 14 21 14 21 4 24 24 24 25 25 26 26 26 27 27 28 28 28 5 30 30 31 31 32 32 33 33 34 34 35 35 36 6 35 36 37 37 38 38 39 40 40 41 41 42 43 7 41 42 43 43 44 45 46 46 47 48 48 49 50 8 47 48 49 50 50 51 52 53 54 54 55 56 57 9 53 54 55 56 57 58 59 59 60 61 62 63 64 72 73 74 75 76 77 78 79 80 81 82 83 84 1 7 7 7 8 8 8 8 8 8 8 8 8 8 2 14 15 15 15 15 15 16 16 16 16 16 17 17 3 22 22 22 23 23 23 23 24 24 24 25 25 25 4 29 29 30 30 30 31 31 32 32 32 33 33 34 5 36 37 37 38 38 39 39 40 40 41 41 42 42 6 43 44 44 45 46 46 47 47 48 49 49 50 50 7 50 51 52 53 53 54 55 55 56 57 57 58 59 8 58 58 59 60 61 62 62 63 64 65 66 66 67 9 65 66 67 68 68 69 70 71 72 73 74 75 76 85 86 87 88 89 90 91 92 93 94 95 96 97 1 9 9 9 9 9 9 ~~9~ 9 9 9 10 10 10 2 17 17 17 18 18 18 18 18 19 19 19 19 19 3 26 26 26 26 27 27 27 28 28 28 29 29 29 4 34 34 35 35 36 36 36 37 37 38 38 38 39 5 43 43 44 44 45 45 46 46 47 47 48 48 49 6 51 52 52 53 53 54 55 55 56 56 57 58 58 7 60 60 61 62 62 63 64 64 65 66 67 67 68 8 68 69 70 70 71 72 73 74 74 75 76 77 78 9 77 77 78 79 80 81 82 83 84 85 86 86 87 98 99 100 101 102 103 104 105 106 107 108 109 110 1 10 10 10 10 10 10 10 11 11 11 11 11 11 2 20 20 20 20 20 21 21 21 21 21 22 22 22 3 29 30 30 30 31 31 31 32 32 32 32 33 33 4 39 40 40 40 41 41 42 42 42 43 43 44 44 5 49 50 50 51 51 52 52 53 53 54 54 55 55 6 59 59 60 61 61 62 62 63 64 64 65 65 66 7 69 69 70 71 71 72 73 74 74 75 76 76 77 8 78 79 80 81 82 82 83 84 85 86 86 87 88 9 88 89 90 91 92 93 94 95 95 96 97 98 99 [The Table is continued on the following pages. The portion which succeeds has the common difference in the argument column, one-tenth of that in the preceding portion of the Table,] 47 TABLE II. Log Log (I-*) Pro. & 1 2 3 4 5 6 7 8 9 Diff. Parts. i-ooo 1-95 4243 4231 4220 4209 4198 4187 4176 4165 4154 4142 11 001 4131 4120 4109 4098 4087 4076 4064 4053 4042 4031 002 003 4020 3908 4009 3897 3997 3885 3986 3874 3975 3863 3964 3852 3953 3941 3841 3829 3930 3818 3919 3807 004 3796 3785 3773 3762 3751 3740 3728 3717 3706 3695 005 3683 3672 3661 3650 3638 3627 3616 3605 3593 3582 006 3571 3559 3548 3537 3526 3514 3503 3492 3480 3469 U 007 3458 3446 3435 3424 3412 3401 3390 3378 3367 3356 1 ] 008 3344| 3333 3322 3310 3299 3288 3276 3265 3254 3242 2 2 009 3231 3220 3208 3197 3185 3174 3163 3151 3140 3128 3 ; 4 4 010 953117 3106 3094 3083 3071 3060 3049 3037 3026 3014 5 6 on 3003 2991 2980 2969 2957 2946 2934 2923 2911 2900 6 7 012 2888 2877 2866 2854 2843 2831 2820 2808 2797 2785 7 8 013 2774 2762 2751 2739 2728 2716 2705 2693 2682 2670 12 8 c 014 2659 2647 2636 2624 2613 2601 2590 2578 2566 2555 9 10 mmm 015 2543 2532 2520 2509 2497 2486 2474 2463 2451 2439 016 2428 2416 2405 2393 2381 2370 2358 2347 2335 2323 017 2312 2300 2289 2277 2265 2254 2242 2231 2219 2207 018 2196 2184 2172 2161 2149 2137 2126 2114 2102 2091 019 2079 2067 2056 2044 2032 2021 2009 1997 1986 1974 020 95 1962 i o/i r 1951 1 OO,I 1939 1 QOO 1927 1 O 1 /k 1916 1 C'AO 1904 1 '7Q r 7 1892 1 77?i 1880 1 7fJ*7 1869 1 1*1 K. 1 1857 1 ri A f\ 12 021 022 1845 1728 1834 1716 loss 1704 1810 1693 1 217 1782 1762 1743 1723 1703 1683 1664 1644 1624 1604 2 4 218 1584 1565 1545 1525 1505 1485 1466 1446 1426 1406 3 6 219 1386 1366 1347 1327 1307 1287 1267 1247 1227 1207 4 8 Ul 220 921188 1168 1148 1128 1108 1088 1068 1048 1028 1008 5 6 12 221 0988 0968 0948 0928 0908 0888 0868 0848 0829 0809 7 14 222 0788 0768 0748 0728 0708 0688 0668 0648 0628 0608 8 16 223 0588 0568 0548 0528 0508 0488 0468 0448 0427 0407 9 is 224 0387 0367 0347 0327 0307 0287 0266 0246 0226 0206 225 0186 0166 0145 0125 0105 0085 0065 0044 0024 0004 226 91 9984 9963 9943 9923 9903 9882 9862 9842 9822 9801 227 9781 9761 9741 9720 9700 9680 9659 9639 9619 9598 21 228 9578 9558 9537 9517 9497 9476 9456 9435 9415 9395 1 2 229 9374 9354 9333 9313 9293 9272 9252 9231 9211 9190 2 4 3C 230 91 9170 9150 9129 9109 9088 9068 9047 9027 9006 8986 21 4 u 8 231 8965 8945 8924 8904 8883 8862 8842 8821 8801 8780 5 11 232 8760 8739 8719 8698 8677 8657 8636 8616 8595 8574 6 13 233 8554 8533 8512 8492 8471 8451 8430 8409 8389 8368 7 15 234 8347 8326 8306 8285 8264 8244 8223 8202 8182 8161 8 17 9 19 235 8140 8119 8099 8078 8057 8036 8015 7995 7974 7953 236 7932 7912 7891 7870 7849 7828 7807 7787 7766 7745 237 7724 7703 7682 7661 7641 7620 7599 7578 7557 7536 238 7515 7494 7473 7452 7431 7410 7390 7369 7348 7327 239 7306 7285 7264 7243 7222 7201 7180 7159 7138 7117 22 240 91 7096 7075 7054 7033 7011 6990 6969 6948 6927 6906 2 c 4 241 6885 6864 6843 6822 6801 6780 6758 6737 6716 6695 3l 7 242 6674 6653 6632 6610 6589 6568 6547 6526 6504 6483 4 9 243 6462 6441 6420 6398 6377 6356 6335 6313 6292 6271 5 11 244 6250 6228 6207 6186 6164 6143 6122 6101 6079 6058 6 13 245 6037 6015 5994 5973 5951 5930 5909 5887 5866 5844 7 8 15 IS 246 5823 5802 5780 5759 5737 5716 5695 5673 5652 5630 9 20 247 5609 5587 5566 5544 5523 5502 5480 5459 5437 5416 22 *m 248 5394 5373 5351 5330 5308 5286 5265 5243 5222 5200 249 5179 5157 5136 5114 5092 5071 5049 5028 5006 4984 1 2 3 4 5 6 7 8 9 Diff. Pro. Parts. 52 TABLE II. Log Log(l-ar) Pro. X 1 2 3 4 5 6 7 8 9 Diff. 'artSi f-250 1-914963 4941 4919 4898 4876 4854 4833 4811 4789 4768 22 251 4746 4724 4703 4681 4659 4638 4616 4594 4572 4551 21 252 4529 4507 4485 4464 4442 4420 43981 4377 4355 4333 1 ^ 253 4311 4289 4267 4246 4224 4202 4180 4158 4136 4115 2 4 254 4093 4071 4049 4027 4005 3983 3961 3939 3918 3896 3 6 255 3874 3852 3830 3808 3786 3764 3742 3720 3698 3676 4 8 256 3654 3632 S610 3588 3566 3544 3522 3500 3478 3456 5 11 257 3434 3412 3390 3368 3345 3323 3301 3279 3257 3235 6 7 13 15 258 3213 3191 3169 3146 3124 3102 3080; 3058 3036 3013 8 17 259 2991 2969 2947 2925 2903 2880 2858 2836 2814 2791 9 MKB 19 260 91 2769 2747 2725 2702 2680 2658 2636 2613 2591 2569 261 2546 2524 2502 2479 2457 2435 2412 2390 2368 2345 22 262 2323 2301 2278 2256 2233 2211 2189 2166 2144 2121 1 2 263 2099 2077 2054 2032 2009 1987 1964 1942 1919 1897 2 4 264 1874 1852 1829 1807 1784 1762 1739 1717 1694 1672 23 3 4 7 9 265 1649 1627 1604 1581 1559 1536 1514 1491 1468 1446 5 H 266 1423 1401 1378 1355 1333 1310 1287 1265 1242 1219 6 13 267 1197 1174 1151 1128 1106 1083 1060 1038 1015 0992 7 15 268 0969 0947 0924 0901 0878 0856 0833 0810 0787 0764 8 18 269 0742 0719 0696 0673 0650 0627 0605 0582 0559 0536 9 mmn 20 270 910513 0490 0467 0444 0421 0399 0376 0353 0330 0307 23 271 0284 0261 0238 0215 0192 0169 0146 0123 0100 0077 272 0054 0031 0008 9985 9962 9939 9916 9893 9870 9847 1 2 2 5 273 90 9824 9801 9777 9754 9731 9708 9685 9662 9639 9616 3 7 274 9593 9569 9546 9523 9500 9477 9454 9430 9407 9384 4 9 275 9361 9338 9314 9291 9268 9245 9221 9198 9175 9152 5 12 276 9128 9105 9082 9059 9035 9012 8989 8965 8942 8919 6 14 277 8895 8872 8849 8825 8802 8779 8755 8732 8708 8685 7 16 81 C 278 8662 8638 8615 8591 8568 8544 8521 8498 8474 8451 lo 9 2] 279 8427 8404 8380 8357 8333 8310 8286 8263 8239 8216 24 280 908192 8169 8145 8121 8098 8074 8051 8027 8004 7980 24 281 7956 7933 7909 7886 7862 7838 7815 7791 7767 7744 1 2 282 7720 7696 7673 7649 7625 7602 7578 7554 7530 7507 2 5 283 7483 7459 7435 7412 7388 7364 7340 7317 7293 7269 3 7 284 7245 7221 7198 7174 7150 7126 7102 7078 7054 7031 4 10 285 7007 6983 6959 6935 6911 6887 6863 6839 6815 6792 5 12 1 A 286 6768 6744 6720 6696 6672 6648 6624 6600 6576 6552 7 14 17 287 6528 6504 6480 6456 6432 6408 6384 6360 6335 6311 8 L i 19 288 6287 6263 C239 6215 6191 6167 6143 6119 6094 6070 9|22 289 6046 6022 5998 5974 5949 5925 5901 5877 5853 5828 2QO 90 5804 5780 5756 5732 5707 56831 5659 5635 5610 5586 25 &U\r 291 5562 5537 5513 5489 5464 5440(54 16 5391 5367 5343 1 g 292 5318 5294 5270 5245 5221 5197 5172 5148 5123 5099 2 5 293 5075 5050 5026 5001 4977 4952 4928 4903 4879 4854 3 4 8 1C 294 4830 4805 4781 4756 4732 4707 4683 4658 4634 4609 25 5 13 295 4584 4560 4535 4511 4486 4462 4437 4412 4388 4363 6 15 296 4338 4314 4289 4264 4240 4215 4190 4166 4141 4116 7il8 297 4092 4067 4042 4018 3993 3968 3943 3919 3894 3869 8 20 298 3844 3819 3795 3770 3745 3720 3695 3671 3646 3621 9 23 299 3596 3571 3546 3521 3497 3472 3447 3422 3397 3372 1 2 3 4 5 6 7 8 9 Diff. Pro. Parts. TABLE II. Log Log (I-*) Pro. X 1 2 3 4 5 6 7 8 ! 9 Diff Parts. T-300 1-90 3347 3322 3297 3272 3247 3222 3197 3172 3147 3122 25 301 orfco 3097 3072 3047 3022 2997 2972 2947 2922 2897 2872 25 302 2847 2822 2797 2772 2747 2722 2697 2671 2646 2621 303 2596 2571 2546 2521 2495 2470 2445 2420 2395 2370 1 2 ' 304 2344 2319 2294 2269 2243 2218 2193 2168 2142 2117 3 8 305 2092 2066 2041 2016 1991 1965 1940 1915 1889 1864 4 10 306 1839 1813 1788 1762 1737 1712 1686 1661 1635 1610 5 13 307 1585 1559 1534 1508 1483 1457 1432 1406 1381 1355 26 6 15 308 1330 1304 1279 1253 1228 1202 1177 1151 1126 1100 7 8 20 309 1074 1049 1023 0998 0972 0946 0921 0895 0870 0844 9 ! 23 M 310 900818 0793 0767 0741 0716 0690 0664 0638 0613 0587 311 0561 0536 0510 0484 0458 0433 0407 0381 0355 0329 26 312 0304 0278 0252 0226 0200 0175 0149 0123 0097| 0071 I 313 0045 0019 9993 9968 9942 9916 9890 9864 9838 9812 2 t 314 89 9786 9760 9734 9708 9682 9656 9630 9604 9578 9552 3 8 315 9526 9500 9474 9448 9422 9396 9370 9344 9318 9292 4 10 316 9265 9239 9213 9187 9161 9135 9109 9083 9056 9030 5 13 6 16 317 9004 8978 8952 8925 8899 8873 8847 8821 8794 8768 7 18 318 8742 8716 8689 8663 8637 8610 8584 8558 8532 8505 a 21 319 8479 8453 8426 8400 8373 8347 8321 8294 8268 8242 9 23 320 89 8215 8189 8162 8136 8109 8083 8057 8030 8004 7977 27 321 7951 7924 7898 7871 7845 7818 7792 7765 7738 7712 27 322 7685 7659 7632 7606 7579 7552 7526 7499 7473 7446 1 j 323 7419 7393 7366 7339 7313 7286 7259 7233 7206 7179 2 5 324 7153 7126 7099 7072 7046 7019 6992 6965 6938 6912 3 4 8 325 6885 6858 6831 6804 6778 6751 6724 6697 6670 6643 5 14 326 6617 6590 6563 6536 6509 6482 6455 6428 6401 6374 6 l(i 327 6347 6320 6293 6266 6239 6212 6185 6158 6131 6104 7 19 328 6077 6050 6023 5996 5969 5942 5915 5888 5861 5834 8 22 329 5807 5780 5752 5725 5698 5671 5644 5617 5590 5562 9 ^mm 24 Mb- 330 89 5535 5508 5481 5454 5426 5399 5372 5345 5317 5290 28 331 5263 5236 5208 5181 5154 5126 5099 5072 5044 5017 332 4990 4962 4935 4908 4880 4853 4825 4798 4771 4743 1 3 333 4716 4688 4661 4633 4606 4578 4551 4523 4496 4468 28 2 6 8 334 4441 4413 4386 4358 4331 4303 4276 4248 4221 4193 4 11 335 4165 4138 4110 4083 4055 4027 4000 3972 3944 3917 5 14 336 3889 3861 3834 3806 3778 3751 3723 3695 3667 3640 6 17 337 3612 3584 3556 3529 3501 3473 04,4* OTTtJ 3417 3390 3362 g 20 22 338 3334 3306 3278 3250 3222 3195 3167 3139 3111 3083 9 25 339 3055 3027 2999 2971 2943 2915 2887 2859 2831 2803 340 89 2775 2747 2719 2691 2663 2635 2607 2579 2551 2523 29 341 2495 2467 2439 2411 2383 2354 2326 2298 2270 2242 1 3 342 2214 2186 2157 2129 2101 2073 2045 2016 1988 1960 2 6 343 1932 1903 1875 1847 1819 1790 1762 1734 1705 1677 3 9 344 1649 1620 1592 1564 1535 1507 1479 1450 1422 1393 4 12 345 1365 1336 1308 1280 1251 1223 1194 1166 1137 1109 29 5 6 15 17 346 1080 1052 1023 0995 0966 0938 0909 0881 0852 0823 7 20 347 0795 0766 0738 0709 0680 0652 0623 0594 0566 0537 8 23 348 0508 0480 0451 0422 0394 0365 0336 0308 0279 0250 j!^ 26 349 0221 0193 0164 0135 0106 0077 0049 0020 9991 9962 1 2 3 4 5 6 7 8 9 Diff. Pro. 'arts. 54 TABLE II. Log Log(l-,) Pro. X 1 2 ! 3 4 5 6 7 8 9 Diff. Parts. 1-350 T-88 993; } 9904 1. 9876! 9847 9818 9789 976C I 9731 9702 9673 29 351 9644 t 9615 9587 9558 9529 950C 9471 9442 9413 9384 29 352 935^ > 9326! 9297 9268 9239 9209 9180 9151 9122 9093 353 9064 , 9035| 900C 8977 8948 8918 8889! 8860 883 8802 354 877.: 1 8743 8714 8685 8656 8627 8597 8568 8539 8510 3 355 848C 18451 842S 8392 8363 8334 8304 8275 8246 8216 4 12 356 8187 8158 8128 8099 8070 8040 8011 7981 7952 7922 5 15 357 789S 7864 7834 7805 7775 7746 7716 7687 7657 7628 30 6 17 358 7596 7569 7539 7509 7480 7450 7421 7391 7361 7332 7 8 20 23 359 7302 7273 7243 7213 7184 7154 7124 7095 7065 7035 9 M 26 mmtrn 360 88 7006 6976 6946 6916 6887 6857 6827 6797 6767 6738 361 6708' 6678 6648 6618 6589 6559 6529 6499 6469 6439 30 362 6409 6379 6350 6320 6290 6260 6230 6200 6170 6140 1 J 363 6110 6080 6050 6020 5990 5960 5930 5900 5870 5840 2 6 364 5810 5780 5750 5719 5689 5659 5629 5599 5569 5539 3 4 1 12 365 5509 5478 5448 5418 5388 5358 5327 5297 5267 5237 366 5206 5176 5146 5116 5085 5055 5025 4994 4964 4934 6 18 367 4903 4873 4843 4812 4782 4752 4721 4691 4660 4630 7 21 368 4600 4569 45391 4508 4478 4447 4417 4386 4356 4325 31 8 24 369 4295 4264 4234 4203 4172 4142 4111 4081 4050 4020 9 ** 27 mmm 370 88 3989 3958 3928 j 3897 3866 3836 3805 3774 3744 3713 31 371 3682 3652 3621 3590 3559 3529 3498 3467 3436 3405 372 3375 3344 3313 3282 3251 3221 3190 3159 3128 3097 1 373 3066 3035 3004 2973 2943 2912 2881 2850 2819 2788 3 9 374 2757 2726 2695 2664 2633 2602 2571 2540 2508 2477 4 12 375 2446 2415 2384 2353 2322 2291 2260 2229 2197 2166 I 5jl6 376 2135 2104 2073 2041 2010 1979 1948 1917 1885 1854 6 19 377 1823 1791 1760 1729 1698 1666 1635) 1604 1572 1541 7 a 22 378 1510 1478 1447 1415 1384 1353 1321 1290 1258 1227 o 9 28 379 1195 1164 1132 1101 1069 1038 1006 0975 0943 0912 32 **mm MB 380 88 0880 0849 0817 0786 0754 0722 0691 0659 0628 0596 32 381 0564 0533 0501 0469 0438 0406 0374 0342 0311 0279 j 3 382 0247 0215 0184 0152 0120 0088 0057 0025 9993 9961 2 6 383 87 9929 9897 9865 9834 9802 9770 9738 9706 9674 9642 3 10 384 9610 9578 9546 9514 9482 9450 9418 9386 9354 9322 4 13 385 9290 9258 9226 9194 9162 9130 9098 9066 9034 9002 5 16 m 386 8969 8937 8905 8873 8841 8809 8776J 8744 8712 8680 3 , 1 C7 7 22 387 8648 8615 8583 8551 8519 8486 8454J 8422 8389 8357 8 26 388 8325 8292 8260 8228 8195 8163 8130 8098 8066 8033 9 . >9 389 8001 7968! 7936 7903 7871 7839 7806 7774 7741 7709 33 > 67 7676 7643 7611 7578 jt-if* 7ci q 74ft 1 7443 741 ?i 7quq 33 391 7350 7318 7285 7252 7220 i O id 7187 TO JL 7154 1 T?TO 1 T 1 ij 7122 7089 ooo 7056 I \ -. 3 392 7023 6991 6958 6925 6892 6860 6827 6794 6761 6728 2 7 3! i /\ 393 6696 6663 6630 6597 6564 6531 6498 6465 6433 6400 1U 4 13 394 6367 6334 6301 6268 6235 6202 6169 6136 6103 6070 I 5 17 395 6037 6004 5971 5938 5905 5872 5838 5805 5772 5739 6 20 396 397 5706 5374 5673 5640J 5607 5341 5308 5274 5573 5241 5540 5208 5507 5175 5474 5441 5141 5108 5407 5075 7 23 826 q on 398 5041 5008 4975 4941 4908 4874 4841 4808 4774 4741 mn f\J 399 4707 4674 4640 4607 4574 4540 4507 4473 4439 4406 34 1 2 3 4 5 6 7 8 9 Diff'. ro. arts. TABLE II. Log X Log(l-ff) Diff. Pro. Parts. 1 2 3 4 5 6 7 8 9 f-400 401 402 403 404 405 406 407 408 409 T-87 4372 4036 3699 3361 3022 2682 2341 1999 1655 1311 4339 4003 3666 3328 2988 2648 2307 1964 1621 1277 4305 3969 3632 3294 2954 2614 2273 1930 1587 1242 4272 3935 3598 3260 2920 2580 2238 1896 1552 1208 4238 3902 3564 3226 2886 2546 2204 1862 1518 1173 4205 3868 3531 3192 2852 2512 2170 1827 1483 1139 4171 3834 3497 3158 2818 2478 2136 1793 1449 1104 4137 3801 3463 3124 2784 2443 2102 1759 1415 1069 4104 3767 3429 3090 2750 2409 2007 1724 1380 1035 4070 3733 3395 3056 2716 2375 2033 1690 1346 1000 34 35 36 37 33 11 2 7 3 10 4 13 517 620 723 826 930 34 3 7 10 14 17 20 24 27 31 410 411 412 413 414 415 416 417 418 419 87 0966 0619 0272 86 9923 9573 9222 8870 8517 8163 7808 0931 0584 0237 9888 9538 9187 8835 8482 8128 7772 0896 0550 0202 9853 9503 9152 8800 8447 8092 7737 0862 0515 0167 9818 9468 9117 8765 8411 8057 7701 0827 0480 0132 9783 9433 9082 8729 8376 8021 7666 0793 0446 0097 9748 9398 9047 8694 8340 7986 7630 0758 0411 0063 9713 9363 9011 8659 8305 7950 7594 0723 0376 0028 9678 9328 8976 8623 8270 7915 7559 0689 0341 9993 9643 9293 8941 8588 8234 7879 7523 7166 6807 6448 6087 5726 5363 4999 4634 4267 3900 0654 0306 9958 9608 9257 8906 8553 8199 7844 7487 2 3 4 5 6 7 8 9 35 4 7 11 14 18 21 25 28 32 36 11 14 18 22 25 29 32 420 421 422 423 424 425 426 427 428 429 86 7452 7094 6736 6376 6015 5653 5290 4926 4560 4194 7416 7058 6700 6340 5979 5617 5254 4889 4524 4157 7380 7023 6664 6304 5943 5581 5217 4853 4487 4120 7345 6987 6628 6268 5907 5544 5181 4816 4451 4084 7309 6951 6592 6232 5870 5508 5144 4780 4414 4047 7273 6915 6556 6196 5834 5472 5108 4743 4377 4010 7237 6879 6520 6160 5798 5435 5072 4707 4341 3973 7202 6843 6484 6123 5762 5399 5035 4670 4304 3937 7130 6772 6412 6051 5689 5326 4962 4597 4231 3863 1 2 3 4 5 6 7 \ 37 4 7 11 15 19 22 26 30 33 38 4 8 11 15 19 23 27 30 34 430 431 432 433 434 435 436 437 438 439 86 3826 3457 3087 2716 2344 1970 1595 1220 0842 0464 3789 3420 3050 2679 2306 1933 1558 1182 0805 0426 3753 3383 3013 2642 2269 1895 1520 1144 0767 0388 3716 3346 2976 2605 2232 1858 1483 1107 0729 0350 3679 3309 2939 2567 2194 1820 1445 1069 0691 0312 3642 3272 2902 2530 2157 1783 1408 1031 0653 0275 3605 3235 2865 2493 2120 1745 1370 0993 0616 0237 3568 3198 2828 2456 2082 1708 1332 0956 0578 0199 3531 3161 2790 2418 2045 1671 1295 0918 0540 0161 3494 3124 2753 2381 2008 1633 1257 0880 0502 0123 38 39 1 2 3 4 5 6 7 I 39 4 8 12 16 20 23 27 31 35 40 4 8 12 16 20 24 28 32 36 440 441 442 443 444 445 446 447 448 449 86 0085 85 9704 9322 8939 8554 8169 7782 7391 7005 6614 0047 9666 9284 8900 8516 8130 7743 7355 6966 6575 0009 9628 9245 8862 8477 8092 7704 7316 6927 6536 9971 9589 9207 8824 8439 8053 7666 7277 6888 6497 9932 9551 9169 8785 8400 8014 7627 7238 6849 6457 9894 9513 9131 8747 8362 7976 7588 7199 6809 6418 9856 9475 9092 8708 8323 7937 7549 7160 6770 6379 9818 9437 9054 8670 8285 7898 7510 7122 6731 6340 9780 9398 9016 8631 8246 7859 7472 7083 6692 6301 9742 9360 8977 8593 8207 7821 7433 7044 6653 6261 1 2 3 4 5 6 7 8 9 Diff. Pro. Parts. TABLE II. Log X Log(l-;r) Diff. Pro. Parts. 1 2 3 4 6065 5672 5277 4881 4483 4085 3685 3283 2881 2477 5 6 7 8 9 1-450 451 452 453 454 455 456 457 458 459 1-85 6222 5829 5435 5039 4642 4244 3845 3444 3042 2639 6183 5790 5395 5000 4603 4204 3805 3404 3002 2598 6144 5750 5356 4960 4563 4161 3765 3364 2961 2558 6104 5711 5316 4920 4523 4124 3725 3324 2921 2517 6026 5632 5237 4841 4443 4045 3645 3243 2840 2436 2031 1625 1217 0807 0397 9985 9572 9157 8741 8324 5987 5593 5198 4801 4404 4005 3604 3203 2800 2396 5947 5553 5158 4762 4364 3965 3564 3163 2760 2356 5908 5514 5118 4722 4324 3925 3524 3122 2719 2315 5869 5474 5079 4682 4284 3885 3484 3082 2679 2275 40 41 1 2 3 6 6 7 8 9 40 4 8 12 16 20 24 28 32 36 41 4 8 12 16 21 25 29 33 37 460 461 462 463 464 465 466 467 468 469 85 2234 1828 1421 1012 0602 0191 84 9778 9365 8949 8533 2193 1787 1380 0971 0561 0150 9737 9323 8908 8491 2153 1747 1339 0930 0520 0109 9696 9282 8866 8449 2112 1706 1298 0889 0479 0067 9654 9240 8824 8407 2072 1665 1258 0848 0438 0026 9613 9199 8783 8366 1991 1584 1176 0766 0356 9944 9530 9116 8699 8282 1950 1543 1135 0725 0315 9902 9489 9074 8658 8240 1909 1502 1094 0684 0273 9861 9447 9032 8616 8198 1869 1462 1053 0643 0232 9820 9406 8991 8574 8156 42 43 44 45 46 Diff. 1 2 3 4 5 6 7 8 9 1? 4 8 13 17 21 25 29 34 38 43 4 9 13 17 22 26 30 34 39 470 471 472 473 474 475 476 477 478 479 848115 7695 7275 6852 6429 6004 5578 5150 4721 4290 8073 7653 7232 6810 6386 5961 5535 5107 4678 4247 8031 7611 7190 6768 6344 5919 5492 5064 4635 4204 7989 7569 7148 6725 6302 5876 5450 5021 4592 4161 7947 7527 7106 6683 6259 5834 5407 4979 4549 4118 7905 7485 7064 6641 6217 5791 5364 4936 4506 4075 7863 7443 7021 6598 6174 5748 5321 4893 4463 4031 7821 7401 6979 6556 6132 5706 5278 4850 4420 3988 7779 7359 6937 6514 6089 5663 5236 4807 4377 3945 7737 7317 6895 6471 6047 5620 5193 4764 4333 3902 3468 3034 2598 2160 1721 1281 0839 0395 9951 9504 2 3 4 5 6 : 4445 4 5 9 9 1314 1818 2223 2627 31J32 3536 4041 480 481 482 483 484 485 486 487 488 489 84 3858 3425 2990 2554 2116 1677 1237 0795 035J 83 9906 3815 3382 2947 2510 2072 1633 1192 0750 0307 9861 3772 3338 2903 2467 2029 1589 1148 0706 0262 9817 3729 3295 2860 2423 1985 1545 1104 0662 0218 9772 3685 3251 2816 2379 1941 1501 1060 0617 0173 9728 3642 3208 2772 2335 1897 1457 1016 0573 0129 9683 3599 3164 2729 2292 1853 1413 0972 0529 0084 9638 3555 3121 2685 2248 1809 1369 0927 0484 0040 9594 3512 3077 2641 2204 1765 1325 0883 0440 9995 9549 1 2 3 4 5 6 7 8 9 46,47 5 5 9 9 1414 18,19 2324 28,28 3233 3738 41 42 490 491 492 493 494 495 496 497 498 499 83 9459 9011 8562 8111 7659 7205 6749 6292 5833 5373 9415 8967 8517 8066 7613 7159 6703 6246 5787 5327 9370 8922 8472 8021 7568 7114 6658 6200 5741 5281 9325 8877 8427 7975 7522 7068 6612 6154 5695 5235 9280 8832 8382 7930 7477 7022 6566 6109 5649 5189 9236 8787 8337 7885 7432 6977 6521 6063 5603 5142 9191 8742 8292 7840 7386 6931 6475 6017 5557 5096 9146 8697 8246 7794 7341 6886 6429 5971 5511 5050 9101 8652 8201 7749 7295 6840 6383 5925 5465 5004 9056 8607 8156 7704 7250 6795 6338 5879 5419 4958 1 2 3 4 5 6 7 8 9 Pro. Parts. 57 TABLE II. Log Log(l-ar) Pro. X 1 2 3 4 5 6 7 8 9 Parts. r-500 834911 4865 4819 4773 4726 4680 4634 4587 4541 4495 501 4448 4402 4355 4309 4262 4216 4170 4123 4076 4030 47 4 17 18 502 3983 3937 3890 3844 3797 3750 3704 3657 3610 3564 503 3517 3470 3424 3377 3330 3283 3236 3190 3143 3096 o b n b 10 504 3049 3002 2955 2908 2861 2814 2767 2721 2674 2626 314 14 505 2579 2532 2485 2438 2391 2344 2297 2250 2203 2156 419 506 2108 2061 2014 1967 1919 1872 1825 1778 1730 1683 524 24 507 1636 1588 1541 1493 1446 1399 1351 1304 1256 1209 628 29 508 509 1161 0685 1114 0638 1066 0590 1019 0542 0971 0494 0923 0447 0876 0399 0828 0351 0781 0303 0733 0256 48 733 838 9 ( 42 34 38 43 510 83 0208 0160 0112 0064 0016 9968 9920 9872 9824 9776 511 82 9728 9680 9632 9584 9536 9488 9440 9392 9344 9296 49J50 512 9248 9199 9151 9103 9055 9007 8958 8910 8862 8813 1 5 c 513 8765 8717 8668 8620 8572 8523 8475 8426 8378 8329 2 10 10 514 8281 8232 8184 8135 8087 8038 7990 7941 7892 7844 49 3 lb 15 515 7795 7747 7698 7649 7600 7552 7503 7454 7405 7357 4 20 20 516 7308 7259 7210 7161 7112 7063 7014 6965 6917 6868 b 6 2b 9 2b 30 517 6819 6770 6721 667J 6622 6573 6524 6475 6426 6377 7 34 35 518 6328 6279 6229 6180 6131 6082 6032 5983 5934 5885 8 39 40 519 5835 5786 5736 5687 5638 5588 5539 5489 5440 5390 9 44 45 520 82 5341 5292 5242 5192 5143 5093 5044 4994 4944 4895 50 51 52 521 4845 4795 4746 4696 4646 4596 4547 4497 4447 439 r D1 r* 522 4347 4298 4248 4198 4148 4098 4048 3998 3948 3898 1 5 523 3848 379b 3748 3698 3648 3598 3548 3498 3447 3397 2 1010 524 3347 3297 3247 3196 3146 3096 3046 299o 2945 2895 3 4 15 16 2021 525 2844 2794 2743 2693 2643 2592 2542 249 2441 2390 51 5 2626 526 2340 2289 2239 2188 2137 2087 2036 1985 1935 1884 (i 3l!31 527 1833 1783 1732 1681 1630 1580 1529 1478 1427 1376 7 3636 528 1325 1274 1223 1173 1122 1071 1020 0969 0918 0867 8 41 42 529 0815 0764 0713 0662 0611 0560 0509 0458 0106 0355 9 4647 0099 9842 530 82 0304 0253 0201 0150 0047 9996 9945 9893 5354 531 81 9790 9739 9688 9636 9,585 9533 948? 943C 9378 9327 52 532 9275 9224 9172 9120 9069 9017 8965 8914 8862 8810 I 5 533 8758 8706 8655 8603 8551 8499 8447 8395 8343 8291 2 3 HIM 16 }K 534 8239 8187 8135 8083 8031 7979 7927 787j 7823 7771 4 21 22 535 7719 7667 7614 7562 7510 7458 7406 7353 7301 7249 5 27 27 536 7196 7144 7092 7039 6987 6934 6882 6830 6777 6725 53 6 32 32 537 6672 6620 6567 6514 6462 6409 6357 6304 6251 6199 V 37 38 538 6146 6093 6041 c c i o 5988 f 4 : iQ 5935 t/i r\f> 5882 5829 577^ IKO/1O 5724 C I QA 5671 K I A.] 8 !> 42 48 43 49 ooy OOio oooo 0*1)0 4876 dOOJ OoUU 540 81 5088 5035 4982 4929 4823 4769 4716 4663 4610 5556 541 4556 4503 4450 4397 4343 4290 4237 418, 4130 4076 542 4023 3969 3916 3862 3809 3755 3702 364S 3595 3541 54 1 (j n |] 543 3487 3434 3380 3326 3273 3219 3165 311 3058 3004 3 17 17 544 2950 2896 2842 2788 2734 2681 2627 2573 2519 2465 4 2222 545 2411 2357 2303 2249 2194 2140 2086 2032 1978 1924 5 2828 546 1870 1815 1761 1707 1652 1598 1544 1490 1435 1381 b 7 3334 }Q QQ 547 1326 1272 1218 1163 1109 1054 1000 0945 0890 0836 55 8 44 45 548 0781 0727 0672 0617 0563 0508 0453 0399 0344 0289 9 50 50 549 0234 01V9 0125 0070 0015 9960 9905 9850 9795 9740 1 2 3 4 5 6 7 8 9 Diff Pro. Parts. 58 TABLE II. Log(l-*) Log Diff Pro. X 1 2 3 4 5 6 7 8 9 Parts. 550 ~ 80 9685 9630 9575 9520 9465 9410 9355 9300 9245 9190 551 9134 9079 9024 8969 8914 8858 8803 8748 8692 8637 5758 552 8582 8526 8471 8415 8360 8304 8249 8193 8138 8082 56 553 8027 7971 7915 7860 7804 7748 7693 7637 7581 7526 1 6 -6 554 7470 7414 7358 7302 7246 7191 7135 7079 7023 6967 2 3 1 1 17 12 17 555 6911 6855 6799 6743 6687 6631 6575 6519 6462 6406 42323 556 6350 6294 6238 6181 6125 6069 6013 5956 5900 5844 52929 557 5787 5731 5674 5618 5561 5505 5448 5392 5335 5279 57 6 34 35 558 5222 5166 5109 5052 4996 4939 4882 4826 4769 4712 7 40 41 8 4fi 4fi 559 4655 4598 4542 4485 4428 4371 4314 4257 4200 4143 O rtO TtO 95l|52 560 80 4086 4029 3972 3915 3858 3801 3744 3687 3630 3572 561 3515 3458 3401 3343 3286 3229 3171 3114 3057 2999 _|59 60 562 2942 2885 2827 2770 2712 2655 2597 2540 2482 2424 58 1 Q 5 563 2367 2309 2251 2194 2136 2078 2021 1963 1905 1847 2 12 12 564 1789 1732 1674 1616 1558 1500 1442 1384 1326 1268 3 18 18 565 1210 1152 1094 1036 0978 0919 0861 0803 0745 0687 4 24 24 566 0628 0570 0512 0454 0395 0337 0279 0220 0162 0103 5 30 30 567 0045 9986 9928 9869 9811 9752 9694 9635 9576 9518 59 6 7 35 41 36 42 568 79 9459 9400 9342 9283 9224 9165 9106 9048 8989 8930 8 47 48 569 8871 8812 8753 8694 8635 8576 8517 8458 8399 8340 9 53 54 570 798281 8222 8163 8104 8044 7985 7926 7867 7807 7748 61 fi9 571 7689 7629 7570 7511 7451 7392 7332 7273 7213 7154 60 O 572 7094 7035 6975 6915 6856 6796 6737 6677 6617 6557 ~] 6 6 573 6498 6438 6378 6318 6258 6198 6139 6079 6019 5959 2 12 12 574 5899 5839 5779 5719 5659 5599 5538 5478 5418 5358 3 18 19 4 24 25 575 5298 5238 5177 5117 5057 4996 4936 4876 4815 4755 5 31 31 576 4694 4634 4574 4513 4453 4392 4331 4271 4210 4150 61 6 37 37 577 4089 4028 3968 3907 3846 3785 3725 3664 3603 3542 7 43 43 578 3481 3420 3359 3298 3238 3177 3116 3054 2993 2932 8 49 50 579 2871 2810 2749 2688 2627 2565 2504 2443 2382 2320 955 56 2136 62 580 79 2259 2198 2075 2013 1952 1891 1829 1768 1706 63 64 581 1644 1583 1521 1460 1398 1336 1275 1213 1151 1089 582 1028 0966 0904 0842 0780 0718 0656 0594 0533 0471 1 6 6 583 0409 0346 0284 0222 0160 0098 0036 9974 9912 9849 2 13 13 584 78 9787 9725 9662 9600 9538 9475 9413 9351 9288 9226 3 4 19 25 19 26 585 9163 9101 9038 8976 8913 8851 8788 8725 8663 8600 63 5 32 32 586 8537 8474 8412 8349 8286 8223 8160 8098 8035 7972 6 38 38 587 7909 7846 7783 7720 7657 7594 7531 7467 7404 7341 7 44 45 588 7278 7215 7151 7088 7025 6962 6898 6835 6772 6708 8 50 51 589 6645 6581 6518 6454 6391 6327 6264 6200 6136 6073 64 9 MM 57 tmmm 58 3M 590 78 6009 5945 5882 5818 5754 5690 5627 5563 5499 5435 65 66 591 5371 5307 5243 5179 5115 5051 4987 4923 4859 4795 592 4731 4667 4602 4538 4474 4410 4345 4281 4217 4152 1 2 7 13 7 13 593 4088 4023 3959 3895 3830 3766 3701 3636 3572 3507 65 3 20 20 594 3443 3378 3313 3249 3184 3119 3054 2990 2925 2860 4 26 26 595 2795 2730 2665 2600 2535 2470 2405 2340 2275 2210 5 33 33 596 2145 2080 2014 1949 1884 1819 1753 1688 1623 1558 6 39 46 40 if 597 1492 1427 1361 1296 1230 1165 1099 1034 0968 0903 66 6 52 *rC 53 598 0837 0771 0706 0640 0574 0508 0443 0377 0311 0245 59 59 599 0179 0113 0047 9982 9916 9850 9784 9717 9651 9585 1 2 3 4 5 6 7 8 9 Diff. Pro. Parts. 59 TABLE II. Log X Log(i-*) Diff Pro. Parts. - 66 7 13 20 26 33 4C 46 53 5S 67 7 13 20 27 34 40 47 54 60 68 14 20 27 34 41 48 54 6 1 2 3 4 5 6 7 8 9 r-eoo 601 602 603 604 605 606 607 608 609 T-77 9519 8857 8191 7523 6853 6180 5505 4826 4146 3462 9453 8790 8125 7457 6786 6113 5437 4758 4077 3394 9387 8724 8058 7390 6719 6045 5369 4690 4009 3325 932 8657 7991 7323 6651 5978 5301 4622 3941 3257 9254 8591 7924 7256 6584 5910 5234 4554 3873 3188 9188 8524 7858 7189 6517 5843 5166 4486 3804 3119 9122 8458 7791 7122 6450 5775 5098 4418 3736 3051 9056 8391 7724 7054 6382 5708 5030 4350 3667 2982 8989 8325 7657 6987 6315 5640 4962 4282 3599 2914 8923 8258 7590 6920 6248 5572 4894 4214 353 2845 2156 1465 0771 0075 9375 8673 7969 7261 6550 5837 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 68 7 14 21 28 35 41 48 55 62 70 7 14 21 28 35 42 49 56 63 71 14 21 28 36 43 50 57 64 610 611 612 613 614 615 616 617 618 619 77 2776 2087 1396 0702 0005 76 9305 8603 7898 7190 6479 2707 2018 1327 0632 9935 9235 8533 7827 7119 6408 2639 1949 1257 0563 9865 9165 8462 7757 7048 6337 2570 1880 1188 0493 9795 9095 8392 7686 6977 6266 2501 1811 1119 0423 9725 9025 8321 7615 6906 6194 2432 1742 1049 0354 9655 8954 8251 7544 6835 6123 2363 1673 0980 0284 9585 8884 8180 7473 6764 6052 2294 1604 0910 0214 9515 8814 8110 7403 6693 5980 2225 1534 0841 0144 9445 8744 8039 7332 6622 5909 2 3 4 5 6 7 8 9 ' 14 22 29 36 43 50 58 65 73 7 15 22 29 27 44 51 58 66 74 15 22 30 37 44 52 59 67 620 621 622 623 624 625 626 627 628 629 76 5766 5050 4330 3608 2884 2156 1425 0692 75 9955 9216 5694 4978 4258 3536 2811 2083 1352 0618 9881 9142 8399 7653 6904 6153 5398 4640 3879 3115 2348 1578 5623 4906 4186 3464 2738 2010 1279 0545 9807 9067 5551 4834 4114 3391 2666 1937 1205 0471 9734 8993 8250 7504 6754 6002 5246 4488 3727 2962 2194 1423 5480 4762 4042 3319 2593 1864 1132 0397 9660 8919 5408 4690 3970 3246 2520 1791 1059 0324 9586 8845 5336 4618 3898 3174 2447 1718 0985 0250 9512 8771 5265 4546 3825 3101 5193 4474 3753 3029 2302 1572 0839 0103 9364 8622 5121 4402 3681 2956 2229 1498 0765 0029 9290 8548 23V4 1645 0912 0176 9438 8696 2 3 4 5 6 7 8 9 75 8 15 23 30 38 45 53 60 68 76 8 23 30 38 46 53 61 68 77 8 15 23 31 39 46 54 i'2 69 630 631 632 633 634 635 636 637 638 639 75 8473 7728 6979 6228 5473 4716 3955 3192 2425 1655 8324 7578 6829 6077 5322 4564 3803 3038 2271 1500 8175 7429 6679 5926 5171 4412 3650 2885 2117 1346 8101 7354 6604 5851 5095 4336 3574 2809 2040 1269 8026 7279 6529 5776 5019 4260 3497 2732 1963 1191 7952 7204 6454 5700 4943 4184 3421 2655 1886 1114 7877 7129 6378 5625 4868 4108 3345 2578 1809 1037 7802 7054 6303 5549 4792 4031 3268 2502 1732 0959 ] 2 3 4 I 9 78 ~8 16 23 31 39 n 55 62 70 79 ~8~ 32 40 47 55 63 71 80 8 16 24 32 40 48 56 S4 72 640 641 642 643 644 645 646 647 648 649 75 0882 0105 74 9326 8543 7757 6968 6176 5380 4581 3779 0804 0028 9248 8465 7679 6889 6097 5301 4501 3699 0727 9950 9170 8386 7600 6810 6017 5221 4421 3618 0649 9872 9092 8308 7521 6731 5938 5141 4341 3538 0572 9794 9013 8229 7442 6652 5858 5061 4261 3457 0494 9716 8935 8151 7363 6573 5779 4981 4181 3377 0416 9638 8857 8072 7284 6493 5699 4901 4100 3296 0339 9560 8778 7994 7205 6414 5619 4821 4020 3216 0261 9482 8700 7915 7126 6335 5540 4741 3940 3135 0183 9404 8622 7836 7047 6255 5460 4661 3860 3054 | 1-1 CM co rj< o :o > co o> 81 8 16 24 32 11 19 i7 55 3 82j 1 16 25 33; 41* 49; i7i 56' ? 47 33 8 17 25 J3 t2 >0 S 6 5 1 2 3 4 5 6 7 8 9 Diff. Pro. Parts. 1 I 60 TABLE II. Log Log(l-ar) ?ro. Parts. Diff. 2 3 : 6 ' 8 9 32 8 16 25 33 41 49 57 66 74 33 8 17 25 33 42 50 58 66 75 34 8 17 25 34 42 50 59 67 76 X 1 2 3 4 5 6 7 8 9 f-650 651 652 653 654 655 656 657 658 659 1-742974 2165 1352 0536 739717 8895 8069 7239 6406 5569 2893 2084 1271 0455 9635 8812 7986 7156 6323 5486 2812 2002 1189 0373 9553 8730 7903 7073 6239 5402 2731 1921 1108 0291 9471 8647 7820 6990 6155 5318 2650 1840 1026 0209 9389 8565 7737 6906 6072 5234 2570 1759 0945 0127 9306 8482 7654 6823 5988 5150 2489 1678 0863 0045 9224 8399 7571 6740 5904 5066 2408 1596 0782 9963 9142 8317 7488 6656 5821 4982 2327 1515 0700 9881 9059 8234 7405 6573 5737 4898 2246 1434 0618 9799 8977 8151 7322 6489 5653 4813 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 2 3 4 5 6 7 8 9 85 9 17 26 34 43 51 60 68 77 8687 9 9 17 17 2626 3435 4344 5252 6061 6970 77178 660 661 662 663 664 665 666 667 668 669 73 4729 3886 3038 2187 1333 4645 3801 2953 2102 1247 0389 9526 8660 7791 6917 4561 3716 2868 2017 1161 0303 9440 8574 7703 6830 4477 3632 2783 1931 1076 0216 9353 8487 7616 6742 4392 3547 2698 1846 0990 0130 9267 8400 7529 6654 4308 3462 2613 1761 0904 0044 9180 8313 7442 6567 4223 3378 2528 1675 0818 9958 9094 8226 7354 6479 4139 3293 2443 1590 0732 9872 9007 8139 7267 6391 4055 3208 2358 1504 0647 9785 8921 8052 7180 6303 3970 3123 2273 1418 0561 9699 8834 7965 7092 6216 0475 729613 8747 7878 7005 1 2 4 5 6 7 8 9 88 9 18 26 35 44 53 62 70 79 89 9 18 27 3d 45 53 62 71 80 90 9 18 27 36 45 54 63 72 81 670 671 672 673 674 675 676 677 678 679 726128 5247 4363 3474 2582 1686 0786 71 9882 8974 8062 6040 5159 4274 3385 2493 1596 0696 9791 8883 7971 5952 5071 4185 3296 2403 1506 0605 9701 8792 7879 5864 4982 409? 3207 2314 1416 0515 9610 8701 7788 5776 4894 4008 3118 2224 1326 0425 9519 8610 7696 5688 4805 3919 3029 2134 1236 0334 9428 8518 7604 5600 4717 3830 2939 2045 1146 0244 9338 8427 7513 5512 4628 3741 2850 1955 1056 0154 9247 8336 7421 5424 4540 3652 2761 1865 0966 0063 9156 8245 7329 5335 4451 3563 2671 1776 0876 9973 9065 8153 7238 I 2 3 4 5 6 7 8 9 91 9 18 27 36 46 55 64 73 82 92 9 18 28 37 46 55 64 74 83 93 9 19 28 37 47 56 65 74 84 680 681 682 683 684 685 686 687 688 689 71 7146 6226 5302 4373 3441 2505 1564 0619 70 9670 8716 7054 6134 5209 4280 3348 2411 1470 0524 9575 8621 6962 6041 5116 4187 3254 2317 1375 0429 9479 8525 6870 5949 5024 4094 3161 2223 1281 0335 9384 8429 6778 5857 4931 4001 3067 2129 1186 0240 9289 8334 6686 5764 4838 3908 2973 2035 1092 0145 9194 8238 6594 5672 4745 3815 2880 1941 0997 0050 9098 8142 6502 5579 4652 3721 2786 1847 0903 9955 9003 8046 6410 5487 4559 3628 2692 1752 0808 9860 8907 7950 6318 5394 4466 3535 2598 1658 0714 9765 8812 7854 1 2 3 4 5 6 7 8 9 94 9 19 28 38 47 56 66 75 85 95 10 19 29 38 48 57 67 76 86 96 10 19 29 38 48 58 67 77 86 690 691 692 693 694 695 696 697 698 699 70 7758 6796 5830 4859 3884 2904 1920 0931 69 9938 8940 7662 6700 5733 4762 3786 2806 1821 0832 9838 8840 7566 6603 5636 4664 3688 2708 1722 0733 9739 8740 7470 6507 5539 4567 3590 2609 1624 0634 9639 8640 7374 6410 5442 4469 3492 2511 1525 0534 9539 8540 7278 6314 5345 4372 3394 2413 1426 0435 9439 8439 7182 6217 5248 4274 3296 2314 1327 0336 9340 8339 7085 6120 5151 4177 3198 2216 1228 0236 9240 8239 6989 6024 5054 4079 3100 2117 1129 0137 9140 8138 6893 5927 4956 3981 3002 2018 1030 0037 9040 8038 1 2 3 4 5 6 7 8 9 97 10 19 29 39 49 58 68 78 87 98 99 10 20 29 39 49 59 69 78 88 10 20 30 40 50 59 69 79 RQ 1 2 3 4 5 6 7 8 9 Diff Pro. Parts. ol TABLE II. Log Log (1 -x) Diff. Pro. Parts. X 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 10(1 10 20 30 40 50 60 70 80 90 101 10 20 30 40 51 61 71 81 i 91 T-700 701 702 703 704 70.5 706 707 708 709 1-69 7938 6930 5919 4902 3881 2855 1824 0789 68 9748 8703 783-5 683C 5817 480C 377S 2752 1721 0685 9644 8598 7737 > 6729 5716 4698 3676 2649 1618 0581 9540 8493 7636 6627 5614 4596 3574 2546 1514 0477 9435 8388 7535 6526 5513 4494 3471 2443 1411 0373 9331 8283 7435 6425 5411 4392 3369 2340 1307 0269 9226 8178 7334 6324 5309 4290 3266 2237 1204 0165 9122 8073 7233 6223 5208 4188 3163 2134 1100 0061 9017 7968 7132 6121 5106 4086 3061 2031 0996 9957 8912 7863 7031 6020 5004 3983 2958 1928 0893 9853 8808 7758 101 102 103 104 105 106 107 108 1 2 3 4 5 6 7 8 9 102 10 20 31 41 51 61 71 82 92 103 10 21 Si 52 62 72 82 93 710 711 712 713 714 715 716 717 718 719 68 7653 6597 5537 4472 3401 2326 1245 0159 67 9068 7971 7547 6491 5431 4365 3294 2218 1136 0050 8958 7861 7442 6386 5324 4258 3186 2110 1028 9941 8849 7751 7336 6280 5218 4151 3079 2002 0920 9832 8739 7641 7231 6174 5111 4044 2972 1894 0811 9723 8630 7531 7126 6068 5005 3937 2864 1786 0703 9614 8520 7421 7020 5962 4898 3830 2756 1678 0594 9505 8411 7311 6914 5856 4792 3723 2649 1570 0485 9396 8301 7201 6809 5749 4685 3616 2541 1461 0377 9286 8191 7090 6703 5643 4578 3508 2433 1353 0268 9177 8081 6980 109 110 111 112 113 1 2 3 4 5 6 7 8 9 104 10 21 31 42 52 62 73 83 94 105 2] 32 42 53 63 74 84 95 720 721 722 723 724 725 726 727 728 729 67 6870 5763 4650 3532 2409 1280 0145 66 9005 7860 6708 6759 5652 4538 3420 2296 1167 0032 8891 7745 6593 6649 5540 4427 3308 2183 1053 9918 8777 7630 6477 6538 5429 4315 3196 2071 0940 9804 8662 7515 6362 6427 5318 4204 3083 1958 0827 9690 8548 7400 6246 5087 3922 2751 1574 0391 9202 8007 6806 5599 4386 6317 5207 4092 2971 1845 0713 9576 8433 7285 6130 6206 5096 3980 2859 1732 0600 9462 8319 7170 6015 6095 4984 3868 2746 1619 0486 9348 8204 7054 5899 5984 4873 3756 2634 1506 0373 9234 8089 6939 5783 4621 3454 2280 1101 9916 8725 7528 6324 5115 3899 5873 4762 3644 2521 1393 0259 9120 7974 6824 5667 114 115 116 117 118 2 3 4 5 6 7 8 9 106 11 21 32 42 53 64 74 85 95 107 11 21 Of 43 54 64 75 86 9ti 730 731 732 733 734 735 736 737 738 739 665551 4388 3220 2045 0865 65 9678 8486 7287 6083 4872 5435 4272 3102 1927 0746 9559 8366 7167 5962 4751 5319 4155 2985 1809 0628 9440 8247 7047 5841 4629 5203 4038 2868 1692 0509 9321 8127 6927 5720 4508 4970 3805 2633 1456 0272 9083 7887 6686 5478 4265 4854 3688 2516 1338 0154 8964 7768 6565 5357 4143 4738 3571 2398 1219 0035 8844 7648 6445 5236 4021 4505 3337 2163 0983 9797 8605 7408 6204 4994 3777 119 120 121 122 Diff. 1 2 3 4 5 6 7 8 9 108 11 22 32 43 54 65 76 86 97 109 ~7I 22 33 44 55 65 76 87 98 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 11 1 2 3 4 6 6 7 8 9 111 i 11 2 22 3 33 4 44 5 56 6 67 7 78 8 89 9 100 112 11 22 34 45 56 67 78 90 101 113 11 23 34 45 57 68 79 90 102 114 115 116 117 118 12 24 35 47 59 71 83 94 106 119 120 12 ~J2 12 1 24 24 2' 36 36 3( 48 48 41 60 60 6 71 72 7( 83 84 81 95 96 9' 107 108 10< I 122 2 12 t 24 > 37 J 49 [ 61 J 73 > 85 1 98 ) 110 123 124 125 126 13 25 38 50 63 76 88 101 113 127 13 25 38 51 64 76 89 102 114 11 12 12 12 23 23 23 23 34 35 35 35 46 46 46 47 57 58 58 59 68 69 70 70 80 81 81 82 91 92 93 94 103 104 104 105 12 25 37 49 62 74 86 98 111 12 13 25 25 37 38 50 50 62 63 74 75 87 88 99 JOO 112 113 62 TABLE II Log LogO-*) Diff. Pro. Parts. X 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 128 13 26 38 51 64 77 9(1 102 115 129 13 26 39 52 65 77 90 103 !16 1-740 741 742 743 744 745 746 747 748 749 T-65 3655 2432 1203 64 9967 8725 7477 6222 4960 3692 2417 3533 2310 1080 9843 8601 7351 6096 4834 3565 2289 3411 2187 0956 9719 8476 7226 5970 4707 3437 2161 0878 9589 8292 6989 5679 4361 3037 1706 0367 9021 7668 6307 4939 3564 2181 0790 9392 7986 6572 5150 3289 2064 0833 9595 8351 7101 5844 4580 3310 2033 3167 1941 0709 9471 8226 6975 5718 4454 3183 1905 0621 9330 8032 6727 5416 4097 2771 1438 0098 8751 3045 1818 0586 9347 8102 6850 5592 4327 3055 1777 2922 1695 0462 9223 7977 6724 5465 4200 2928 1649 2800 1572 0339 9098 7852 6599 5339 4073 2800 1521 2677 1449 0215 8974 7727 6473 5213 3946 2673 1392 2555 1326 0091 8850 7602 6347 5086 3819 2545 1264 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 Diff. 1 2 3 4 5 (3 7 8 9 130 13 26 39 52 65 78 91 104 117 131 13 26 39 52 66 79 92 105 118 750 751 752 753 754 755 756 757 758 759 641136 63 9847 8552 7250 5941 4625 3303 1972 0635 62 9291 1007 9718 8422 7120 5810 4493 3170 1839 0501 9156 0750 9459 8162 6858 5547 4229 2904 1572 0233 8886 0492 9201 7902 6597 5284 3965 2638 1305 9964 8616 0363 9071 7772 6466 5153 3833 2505 1171 9829 8481 0234 8941 7642 6335 5021 3700 2372 1037 9695 8345 0105 8812 7511 6204 4889 3568 2239 0903 9560 8210 9976 8682 7381 6073 4757 3435 2106 0769 9426 8075 1 2 3 4 5 6 7 8 9 132 133 13 13 26 27 40 40 53 53 66 67 79 80 92 93 106 106 119 120 760 761 762 763 764 765 766 767 768 769 62 7939 6580 5214 3840 2458 1069 61 9672 8268 6855 5435 7804 6444 5077 3702 2320 0930 9532 8127 6714 5293 7532 6171 4802 3426 2042 0651 9252 7845 6430 5008 7396 6034 4665 3288 1903 0511 9111 7704 6288 4865 7261 5898 4528 3150 1765 0372 8971 7563 6146 4722 7125 5761 4390 3012 1626 0232 8830 7421 6004 4579 3146 1705 0256 8799 7333 5859 4377 2886 1386 9878 6989 5624 4253 2873 1487 0092 8690 7280 5862 4436 3003 1561 0111 8652 7186 5711 4228 2736 1236 9726 6852 5487 4115 2735 1347 9952 8549 7138 5720 4293 6716 5351 3977 2597 1208 9812 8409 6997 5578 4150 134 13 27 40 54 67 80 94 107 121 135 1 2 3 4 5 6 7 8 9 14 27 41 54 68 81 95 108 122 770 771 772 773 774 775 776 777 778 779 61 4007 2571 1127 60 9674 8213 6744 5267 3781 2287 0784 ~6~ 3864 2427 0982 9528 8067 6597 5119 3632 2137 0633 T" 3720 2283 0837 9383 7920 6450 4971 3483 1987 0482 3577 2138 0692 9237 7774 6302 4822 3334 1837 0331 3433 1994 0547 9091 7627 6154 4674 3184 1687 0180 3290 1850 0401 8945 7480 6007 4525 3035 1536 0029 2859 1416 9965 8506 7039 5563 4079 2586 1085 9575 2715 1271 9820 8360 6892 5415 3930 2437 0934 9424 1 2 3 4, 5 6 7 8 9 136 14 27 41 54 68 82 95 109 122 137 14 27 41 55 69 82 96 110 123 2 3 4 5 6 7 8 9 _ 1 2 3 4 5 6 7 8 9 138 139 14 14 28 28 41 42 55 56 69 70 83 83 97 97 110 111 124 125 140 14 2S 42 56 70 84 98 112 12f | 141 "lil 28 42 56 71 85 99 113 127 142 143 144 145 146 14 14 14 lo! 15 28 29 29 29 29 43 43 43 44 44 57 57 58 58 58 71 72 72 73 73 85 86 86 87 88 99 100 101 102 102 1J4 114 115 116i 117 128 129 130 131 131 1471 148 149 150 151 15 30 45 60 76 91 106 121 136 152! 153 15 15 30 31 46 46 61 61 76 77 91 92 106 107 122 122 137 138 154 15 31 46 62 77 92 108 123 139 155 16 31 47 62 78 93 109 124 140 15 15 15 15 29 30 30 30 44 44 45 45 59 59 60 60 74 74 75 75 88 89 B9 90 103 104 104 105 118 118 119 120 132 133 134 135 TABLE II. Log X Log (1-*) Diff. Pro. Parts 1 2 8969 7446 5915 4375 2826 1268 9700 8123 6537 4941 3 4 5 8513 6988 5454 3911 2359 0798 9228 7648 6059 4461 6 7 8 9 2 3 4 5 6 7 8 9 156 16 31 47 62 78 94 109 125 140 157 16 31 47 63 79 94 110 126 141 158 1-780 781 782 783 784 785 786 787 788 789 1-59 9272 7752 6222 4684 3136 1580 0014 58 8439 6855 5261 9120 7599 6069 4530 2981 1424 9857 8281 6696 5101 8817 7294 5762 4221 2670 1111 9543 7965 6378 4781 8665 7141 5608 4066 2515 0955 9385 7807 6219 4621 8361 6835 5300 3757 2204 0642 9070 7490 5900 4300 8209 6682 5146 3602 2048 0485 8913 7331 5740 4140 8056 6529 4992 3447 1892 0328 8755 7173 5581 3979 7904 6375 4838 3292 1736 0171 8597 7014 5421 3819 2206 0585 8953 7311 5660 3998 2326 0644 8951 7247 5534 3809 2073 0326 8569 6800 5019 3228 1424 9609 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 16 32 47 63 79 95 111 126 142 2 3 4 5 6 7 8 9 159 16 32 48 64 80 95 111 127 143 160 16 32 48 64 80 96 112 128 144 161 ~16 32 48 64 81 97 113 129 145 790 791 792 793 794 795 796 797 798 799 58 3658 2045 0422 57 8789 7147 5494 3831 2158 0475 568781 3497 1883 0259 8625 6982 5328 3664 1990 0306 8611 3336 1721 0096 8462 6817 5162 3497 1822 0137 8441 3175 1559 9933 8298 6652 4996 3330 1654 9968 8271 6563 4845 3116 1376 9625 7863 6089 4304 2508 0700 3014 1397 9770 8133 6487 4830 3163 1486 9799 8100 2852 1235 9607 7969 6322 4664 2996 1318 9629 7930 2691 1072 9444 7805 6156 J4498 2829 1149 9460 7760 2530 0910 9280 7640 5991 4331 2661 0981 9290 7589 2368 0747 9117 7476 5825 4165 2494 0812 9121 7418 16 16 17 17 17 17 17 17 17 17 17 17 18 18 18 18 18 18 18 18 19 19 19 19 Dif 8 9 1 2 3 4 5 6 7 8 9 2 3 4 5 6 8 9 1 3 4 F. 1 2 3 4 5 6 7 8 9 162 16 32 49 65 81 97 113 130 146 163 16 33 49 65 82 98 114 130 147 164 16 33 49 66 82 98 115 131 148 800 801 802 803 804 805 806 807 808 809 56 7077 5362 3636 1899 0151 55 8392 6622 4841 3048 1243 6906 5189 3462 1725 9976 8216 6445 4662 2868 1062 6734 5017 3289 1550 9800 8039 6267 4483 2688 0881 6392 4672 2942 1201 9449 7686 5911 4125 2328 0518 8697 6865 5020 3163 1294 9412 7518 5611 3691 1758 6220 4500 2769 1026 9273 7509 5733 3946 2147 0337 8515 6681 4835 2976 1106 9223 7328 5419 3498 1564 6049 4327 2595 0852 9097 7332 5555 3766 1967 0155 5877 4155 2421 0677 8921 7154 5376 3587 1786 9973 5705 3982 2247 0502 8745 6977 5198 3407 1605 9791 7966 6128 4278 2417 0542 8656 6756 4844 2919 0981 1 2 3 4 5 6 7 8 9 165 166 17 17 33 33 50 50 66 66 83 83 99 100 116 116 132 133 149j 149 167 17 33 50 67 84 100 117 134 150 810 811 812 813 814 815 816 817 818 819 54 9427 7599 5759 3907 2043 0166 53 8277 6375 4460 2533 9245 9063 7416 7232 5575 5390 372 1! 3535 1856 1668 9978 9789 8087 7897 6184 5993 4268 4076 2339 2146 8880 7048 5205 3349 1481 9601 7708 5802 3884 1952 8332 6497 4649 2790 0918 9034 7137 5228 3305 1370 8149 6312 4464 2603 0730 8845 6947 5036 3112 1176 7783 5944 4093 2230 0354 8466 6566 4652 2726 0787 ! 168 1 17 2 34 3 50 4 ! 67 5 84 6 101 7 118 8 134 9 151 169 17 34 51 68 85 101 118 135 152 170 17 34 51 68 85 102 119 136 153 1 2 3 4 5 6 7 8 171 172 173 174 175 176 177 17S 179 180 181 18 2 183 184 185 186 187 188 189 19 38 57 76 95 113 132 151 170, 1 1 4 5 6 7 8 9 17! 17 34 34 51 52 68 69 86J 86 103 103 120 120 137 138 154 155 17 17 35 35 52 1 52 69 70 87 87 104 104 121 122 138 139 156 157 18 18 35 35 53 53 70 70 88 88 105 106 123 123 140 141 158 158 18 35 53 71 89 106 124 142 159 18 36 53 71 89 107 125 142 160 18 36 54 72 90 107 125 143 161 18 36 54 72 90 108 126 144 162 18 36 54 72 91 109 127 145 163 1 3 5 7 9 10 12 14 16 S 18 S 37 5 55 3 73 1 92 9 110 7 128 3 146 1 165 18 37 55 74 92 110 129 147 166 19 37 8 93 111 130 148 167 19 37 56 74 93 112 130 149 167 19 37 56 75 94 112i 131 150 168 19 38 56 75 94 113 132 150 169 64 TABLE II. Log X Log (1-ar) Diff. Prd. Parts. 190 191 192 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 19 38 57 76 95 114 133 152 171 19 38 57 76 96 115 134 153 172 19 38 58 77 96 115 134 154 173 1 T 820 821 822 823 824 825 826 827 828 829 ~-53 0592 52 8638 6671 4691 2696 0688 51 8666 6629 4579 2514 0397 8442 6474 4492 2496 0486 8463 6425 4373 2306 0203 8246 6276 4293 2296 0285 8260 6220 4167 2099 0008 8050 6078 4094 2095 0083 8056 6016 3961 1891 9807 7708 5594 3464 1319 9159 6982 4790 2581 0356 9812 7853 5881 3894 1895 9881 7853 5811 3754 1683 9617 7657 5683 3695 1694 9679 7649 5606 3548 1476 9422 7460 5484 3496 1493 9476 7446 5401 3341 1267 9226 7263 5286 3296 1292 9274 7242 5195 3135 1059 9030 7066 5088 3096 1091 9071 7038 4990 2928 0851 8834 6869 4889 2896 0889 8869 6834 4784 2721 0642 8549 6441 4318 2179 0025 7855 5669 3467 1248 9013 195 197 198 199 201 202 204 205 206 208 209 211 213 214 216 217 219 220 222 224 225 227 229 230 232 234 236 238 240 241 1 2 3 4 5 6 7 8 9 193J 194| "iSps 39 39 58 58 77 78 97 97 116 116 135 136 154 155 174 175 195 20 39 59 78 98 117 137 156 176 830 831 832 833 834 835 836 837 838 839 51 0434 50 8339 6229 4105 1964 49 9808 7637 5449 3246 1026 0225 8129 6018 3891 1749 9592 7419 5230 3024 0803 0016 7918 5806 3678 1534 9375 7201 5010 2803 0580 9598 7497 5381 3250 1104 8942 6764 4570 2360 0133 9388 7286 5169 3036 0888 8725 6545 4350 2138 9909 9179 7075 4956 2822 0673 8507 6326 4129 1916 9686 8969 6864 4744 2608 0457 8290 6107 3909 1693 9462 8759 6653 4531 2394 0241 8073 5888 3688 1471 9238 3 4 5 6 7 8 9 196 197 198 20 20 20 39 39 40 59, 59 59 78 79 79 98 99 99 118 118 119 137 138 139 157 158 158 176 177 178 840 841 842 '843 844 845 846 847 848 849 48 8789 6536 4265 1978 47 9673 7350 5009 2651 0274 46 7878 8564 ; 8340 8115 6309 6083 5856 4037 3809 3581 1748 1518 1288 9441 9209 8978 7117 6883 6650 4774: 4539 4304 2414 2177 1939 0035 9796 9557 7637i7397 7156 7890 5629 3352 1058 8746 6416 4068 1702 9318 6914 7664 5403 3124 0827 8513 6182 3832 1464 9078 6673 7439 5175 2895 0597 8281 5948 3596 1227 8839 6432 7213 4948 2666 0366 8049 5713 3360 0989 8599 6190 6988 4721 2437 0135 7816 5479 3124 0751 8359 5948 6762 4493 2207 9904 7583 5244 2887 0512 8118 5706 o 3 4 5 6 199 200 20 20 40 40 60 60 80 80 100 100 119 120 139 140 159 160 179 180 201 20 40 60 80 101 121 141 161 181 1 2 3 4 5 6 7 8 9 Diff. 8 9 1 i 6 I 9 202 203 204 205 206 207 208 20 > 210J 211 212 213 214 215 216 217 218 219 220 20, 20 40 41 61 61 8) 81 101 102 121 122 141 142 162 162 182 183 20 41 61 82 102 122 143 163 184 21 41 62 82 103 123 144 164 185 21 41 62 82 103 124 144 165 185 21 41 62 83 104 124 145 166 186 21 21 42 4i 62 6C 83 $4 104 10; 1251 12 146 14( 166 16< 187 18fc 21 ! 42 I 84 105 > 126 i 147 168 J 189 21 42 63 84 106 127 148 169 190 21 42 64 85 106 127 148 170 191 21 43 64 85 107 128 149 170 192 21 43 64 86 107 128 ISC 171 193 22 43 65 86 108 129 I 151 | 172 194 22 43 65 86 108 130 151 173 194 22 43 65 87 109 130 152 174 195 22 44 65 87 109 131 153 174 196 22 44 66 88 110 131 153 175 197 22 44 66 88 110 132 154 176 198 ; 221 222 223 224 225, 226 227 228 229 230 231 232 231 \ 234 235 236 237 j 238 239 1 2 3 4 5 6 7 8 9 22 22 44 44 66 67 88 89 111 111 133 133 155 155 177 178 199 200 22 45 67 89 112 134 156 178 201 22 45 67 9G 115 134 157 m 205 23 4J 68 90 113 135 158 180 203 23 45 68 90 113 136 158 181 203 s 68 91 114 136 159 182 204 21 4( 6* 9 ll< 13' 161 18! 20. } 23 > 46 } 69 92 1 115 r 137 ) 160 I 183 3 206 23 46 69 92 115 138 161 184 207 23 46 69 92 116 139 162 185 208 23 46 70 93 116 139 162 186 209 2i 4' 71 9J ir !4( ie; 18< 21( \ 23 ' 47 ) 70 J 94 r 117 ) 140 J 164 > 187 ) 211 24 47 71 94 118 141 165 188 212 24 47 71 94 118 142 165 189 212 24 47 71 95 119 142 166 190 213 24 48 71 95 119 143 167 190 214 24 48 72 96 120 143 167 191 215 TABLK II. Log X LogO -a?) Diff. Pro. Parts. 240 241 242 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 24 41 7i 96 12C 144 I6b 192 216 1- 24 \ 4b ! 72 96 121 14 168 193 217 24 48 73 97 121 145 169 194 218 T850 851 852 853 854 855 856 857 858 859 F-46 5463 3030 0577 45 8104 5612 3099 0566 448012 5437 2841 5221 278i 033C 7856 5361 2847 0311 7755 5178 2580 4978 2541 0084 7607 5111 2594 0057 7499 4919 2319 9696 7052 4385 1696 8983 6248 3488 0704 7896 5064 4735 2296 9837 7359 4860 2341 9802 7242 4660 2057 4492 2051 9590 7110 4609 2088 9547 6984 4401 1796 424 1806 9345 686C 4358 1835 9291 672? 4141 1534 4006 1560 9096 6611 4106 1582 9036 6469 3882 1272 3762 1315 8848 6362 3855 1328 8780 6212 3622 1010 3518 1069 8600 6112 3603 1074 8524 5954 3362 0748 3274 0823 8352 5862 3351 0820 8268 5695 3101 0485 24 24 24 24 25 25 25 25 25 26 26 26 26 27 27 27 27 28 28 28 28 29 29 29 29 30 30 30 30 31 3 5 7 9 1 3 5 7 9 2 4 6 8 1 I 2 3 4 5 6 7 8 9 242 24 4 73 97 123 146 170 194 219 244 24 4S 73 98 122 146 171 195 220 245 ~25 49 74 98 123 147 172 196 221 860 861 862 863 864 865 866 867 868 869 44 0223 43 7583 4920 2236 42 9528 6797 4042 1263 41 8460 5632 9960 7317 4653 1966 9256 6522 3765 0984 8178 5348 9433 6786 4117 1426 8711 5973 3211 0425 7614 4779 9169 6520 3849 1155 8438 5698 2933 0145 7332 4494 8905 6254 3581 0884 8165 5422 2655 9865 7049 4209 8641 5988 3312 0614 7892 5147 2377 9584 6766 3923 8377 5721 3043 0342 7618 4871 2099 9304 6483 3638 8112 5455 2774 0071 7345 4595 1821 9023 6200 3352 7848 5188 2505 9799 7071 4318 1542 8741 5916 3066 5 8 2 5 8 3 5 8 1 4 7 9 3 o 3 4 5 6 7 8 9 | 246 25 49 74 9fl 123 148 172 197 221 247 25 49 74 99 124 148 173 198 222 248 25 50 74 99 124 149 174 198 223 870 871 872 873 874 875 876 877 878 879 41 2779 40 9901 6996 4066 1108 398124 5112 2071 38 9003 5905 2493 9612 6704 3771 0811 7824 4809 1766 8694 5593 2206 9322 6412 3476 0514 7524 4506 1460 8385 5282 1918 9032 6120 3181 0216 7223 4202 1154 8076 4970 1631 8742 5827 2886 9918 6922 3899 0847 7767 4657 1343 8452 5534 2590 9619 6621 3595 0541 7457 4345 1055 8161 5241 2295 9321 6320 3291 0234 7147 4032 0767 7870 4948 1998 9022 6018 2986 9926 6837 3719 0479 7579 4654 1702 8723 5716 2682 9619 6527 3405 0190 7288 4360 1405 8423 5414 2377 9311 6216 3092 ~ 76 I 101 5 127 I 152 i 177 I 202 1 228 254 25 51 76 102 127 152 17S 203 229 255 26 51 77 102 128 153 179 204 230 256 26 51 77 102 128 154 179 205 230 257 26 51 77 103 129 154 180 206 231 25 8 259 260 26 52 78 104 130 156 182 208 234 261 26 52 78 104 131 157 183 209 235 262 26 52 79 105 131 157 183 210 236 263 264 26 26 53 53 79 79 105 106 132 132 158 158 184 185 210 211 237 238 265 27 53 80 106 133 159 186 212 239 266 27 53 80 106 133 160 186 213 239 267 27 53 80 107 134 160 187 214 240 268 ~27 54 80 107 134 161 188 214 241 269 270 27 54 81 108 135 162 189 216 243 2 5 7 10 12 15 18 20 23 6 26 2 52 7 78 3 104 9 130 5 155 1 181 S 207 2 233 27 54 81 108 135 161 188 215 242 1 2 3 4 5 6 7 8 9 271 272 273 274 275 276 27' 1 278 279 280 281 28S 5 283 284 285 286 287 288 289 27 54 81 106 136 16J 19C 2K 244 27 [ 54 R2 5 109 ! 136 ! 163 > 190 218 [ 24-5 27 55 82 109 137 164 191 218 246 27 55 82 110 137 164 192 219 247 28 55 83 110 138 165 193 220 248 28 55 83 110 138 166 193 221 248 2* 5i s; in 13< 166 19^ 22S 24< * 28 > 56 5 83 111 ) 139 5 167 [ 195 i 222 ) 250 28 56 84 112 140 167 195 223 251 28 56 84 112 140 168 196 224 252 28 56 84 112 141 169 197 225 253 2t 56 8i IK 14] 16< 19; 226 254 j 28 i 57 > 85 \ 113 142 ) 170 198 226 \ 255 28 57 85 114 142 170 199 227 256 29 57 86 114 143 171 200 228 257 29 57 86 114 143 172 200 229 257 29 57 86 115 144 172 201 230 258 29 58 86 115 144 173 202 230 259 29 58 87 116 145 173 202 231 260 TABLE II. Log X Log(l-aO 1 2 3 4 5 6 7 8 9 : 290 291 292 29 29 29 58 58 58 87 87 88 116 116 117 145 146 146 174! 175 175 203 ] 204 204 232 233! 234 261 262 263 1 2 3 4 5 6 7 8 9 1-880 881 882 883 884 885 886 887 888 889 1-38 2778 37 9620 6433 3214 36 9964 6682 3367 0018 35 6637 3220 2463 9303 6112 2891 963? 6352 3033 9682 6297 2877 2149 8985 5791 2567 9310 6021 2700 9345 5956 2533 1834 8667 5470 2242 8983 5691 2366 9007 5615 2188 1518 8349 5149 1918 8655 5360 2031 8670 5274 1844 1202 803C 4827 159S 8327 5028 169? 8332 4933 1498 0887 7711 4505 1268 7998 4697 1362 7993 4591 1153 7681 4172 0626 7043 3422 9761 6061 2321 8540 4716 0571 7392 4183 0942 7670 4365 1026 7655 4249 0808 0254 7073 3860 0616 7341 4032 0691 7316 3906 0462 9938 6753 3537 0290 7011 3700 0355 6976 3563 Olio 316 319 322 325 328 331 334 338 341 345 348 352 356 360 364 368 372 376 380 384 1 2 3 4 5 6 7 8 9 293 29 59 88 117 147 176 205 234 264 294 29 59 88 118 147 176 206 235 265 295 30 59 89 ,118 I 148 I 177 207 236 i 266 890 891 892 893 894 895 896 897 898 899 34 9769 6282 2758 339197 5599 1962 32 8286 4570 0814 31 7015 9422 5931 2403 8839 5237 1596 7916 4196 0436 6633 9074 5580 2049 8481 4875 1230 [7546 |3822 : 0057 6251 8726 5228 1694 8122 4512 0864 7176 3448 9678 5868 8378 4876 1338 7763 4149 0497 6805 3072 9299 5484 8030 4524 0982 7403 3785 0129 6433 2697 8920 5100 7331 3819 0270 6683 3057 9393 5689 1945 8159 4331 6982 3466 9913 6322 2693 9025 5317 1568 7778 3946 6632 3112 9555 5961 2328 8656 4944 1191 7397 3561 1 2 3 4 5 6 296 30 59 89 118 148 178 207 237 266 297 30 59 89 119 149 178 208 238 267 298 30 60 89 U9 149 179 209 238 268 1 2 3 4 5 6 7 8 9 Diff. 8 9 29! 3( 6( 9( 12( 15( 17! 20! 23! 26< Jj 300 301 302 303 304 ~30 61 91 122 152 182 213 243 274 305 306 307 308 309 310 311 312 313 314 315 316 317 1 3 4 5 6 7 8 9 ) 30 ) 60 ) 90 ) 120 ) 150 ) 180 ) 210 ) 240 > 270 30 60 90 120 151 181 211 241 271 30 i 60 91 121 151 181 211 242 i 272 30 61 91 121 152 182 212 242 273 31 61 92 122 153 183 214 244 275 31 61 92 122 153 184 214 245 275 31 61 92 123 154 184 215 246 276 31 62 92 123 154 185 216 246 277 31 62 93 124 155 185 216 247 278 31 6-2 9 124 15c Iflt 217 24fc 271 31 62 93 r 124 156 187 218 ! 249 > 280 31 62 94 125 156 187 218 250 281 31 63 94 125 157 188 219 250 282 31 63 94 126 157 188 220 251 283 32 63 95 126 158 189 221 252 284 32 32 63 63 95 95 126 127 158 159 190 190 221 222 253 254 284 285 31* 5 319 320 321 322 323 324 325 326 327 328 32 I 330 331 332 333 334 335 j 336 1 2 3 4 5 6 7 8 9 35 6< 91 127 15! 19 22i 25< 28t > 32 I 64 > 96 ' 128 ) 160 191 \ 223 U 255 i 287 32 64 96 128 160 192 224 256 288 32 64 96 128 161 193 225 257, 289 32 64 97 129 161 193 225 258 290 32 65 97 129 162 194 226 258 291 32 65 97 130 162 194 227 259 292 33 65 98 130 163 195 228 260 293 33 65 98 130 163 196 228 261 293 33 65 98 131 164 196 229 262 294 33 66 98 131 164 197 230 262 295 35 66 9< 135 16L 197 23C 265 29t ; 33 ; 66 > 99 J 132 > 165 198 > 231 i 264 j 297 33 66 99 132 166 199 232 265 298 33 66 100 133 166 199 232 266 299 33 67 100 133 167 200 233 266 300 33 67 100 134 167 200 234 267 301 34 67 101 134 168 201 235 268 302 34 67 101 134 168 202 235 269 302 337 338 339 340 341 342 343 344 345 346 j 347 34d 349 350 351 352 353 354 ! 355 2 3 4 5 6 7 8 9 34 34 67 68 101 101 135 135 169 169 202 203 236 237 270 270 303 304 34 68 102 136 170 203 237 271 305 34 68 102 136 170 204 238 272 306 34 68 102 136 171 205 239 273 307 34 68 103 137 171 205 239 274 308 34 69 103 137 172 206 240 274 309 34 69 103 138 172 206 241 275 310 35 69 104 138 173 207 242 276 311 35 69 104 138 173 208 242 277 3J1 35 69 104 139 174 208 243 278 312 35 70 104 139 174 209 244 27S 313 35 70 105 140 175 209 244 279 314 35 70 105 140 175 210 245 280 315! 35 70 105 140 176 211 246 281 316 35 35 70 71 106! 106 141 141 176 177 211 212 246 247 282! 282 317 318 35 71 106 142 177 212 248 283 319 36 71 107 142 178 213 249 284 320 67 PROPORTIONAL PARTS. 356 357 358 359 360 361 362 363 364 365 1 36 36 36 36 36 36 36 36 36 37 2 71 71 72 72 72 72 72 73 73 73 3 107 107 107 108 108 108 109 109 109 110 4 142 143 143 144 144 144 145 145 146 146 5 178 179 179 180 180 181 181 182 182 183 6 214 214 215 215 216 217 217 218 218 219 7 249 250 251 251 252 253 253 254 255 256 8 285 286 286 287 288 289 290 290 291 292 9 320 321 322 323 324 325 32rt 327! 323 329 366 367 368 369 370 371 372 373 374 375 1 37 37 37 37 37 37 37 37 37 38 2 73 73 74 74 74 74 74 75 75 75 3 110 110 110 111 111 111 112 112 112 113 4 146 147 147 148 148 148 149 149 150 150 5 183 184 184 185 185 186 186 187 187 188 6 220 220 221 221 222 223 223 224 224 225 7 2:>r> 257 258 258 259 260 260 261 262 263 8 9 293 294 329 1 330 294 331 295 332 296 333 297 334 298 335 298 336 299 337 300 338 376 377 378 379 380 381 382 383 384 385 1 38 38 38 38 38 38 36 38 38 39 2 75 75 76 76 76 76 76 77 77 77 3 113 113 113 114 114 114 115 115 115 116 4 150 151 151 152 152 152 153 153 154 154 5 188 189 189 190 190 191 191 192 192 193 6 226 226 227 227 228 229 229 230 230 231 7 263 264 265 265 266 267 267 268 269 270 8 301 302 302 303 304 305 306 306 307 308 9 338 339 340 341 342 343 344 345 346 347 END OK TAUI.K H. GENERAL LIBRARY UNIVERSITY OF CALIFORNIA BERKELEY RETURN TO DESK FROM WHICH BORROWED This book is due on the last date stamped below, or on the date to which renewed. Renewed books are subject to immediate recall. SFebs ^RLIBRARY^ DEC 9 - 1937 Uf- <''ALiF.. 8ER JAN 3 2003 LD 21-100m-l, '54(1887816)476 YC 23596 THE UNIVERSITY OF CALIFORNIA LIBRARY