UC-NRLF llll:|!|ll!|:rlll.ill|.|:i M75 y the latitudes of the spots, since their longitudes are but slightly affected by a sifall error in the adopted position of the solar Axis, and the present enquiry is therefore confined to the consideration of the latitudes alone. Two methods for the proposed examination present themselves ; either special spots may be selected for discussion, such as appear to be stable in form, and regular in movement, or the whole material available may be utilized and each complete spot-group may be considered as a unit, and its successive apparent positions employed, regardless of its movements and apparent changes of form and size. The former method was that adopted by Carrington, but appears open to the objection that, in a first discussion at least, the work of selection may introduce serious systematic error, the more so that stable and well-defined spots, such as are likely to be selected for this purpose, are characteristic of a particular phase in the life history of a spot- Wt. 3593/843/574 So 9/I3- N. & Co. Ltd. 701271 4 POSITION OF THE SUN'S Axis, group, and may, therefore, have a tendency to move in a common direction at a common speed. The latter method has therefore been adopted in preference to it. From 1874 to 1885, inclusive, the measures of positions and areas of Sunspots made at Greenwich were exhibited only in the form of a daily record of the Sun's surface. From 1886 onward, in addition to this daily record, the results of the measures were given in the form of a Ledger of Spot Groups ; the various members of each group of spots being combined together for each day of observation, as shown in the specimen annexed. These ledgers, therefore, give the total area of each group for each day during which it remained visible ; its mean longitude from Carrington's zero meridian ; its mean latitude ; and also its longitude from the meridian passing through the centre of the apparent disc. In 1907 ledgers on the same plan were published for the twelve earlier years, 1874-1885. Thus these sunspot ledgers give, in a form convenient for various investigations, the histories of about 7000 separate spot groups which have appeared on the Sun's disc since April 1874, when the Greenwich record commenced. The following table gives a specimen of the form in which the life-history of a Spot-group is exhibited in the Ledgers : TABLE 1. Extract from the Ledgers of Groups of Sun Spots. Group 6806. A regular spot, a, followed by some small companions until January 26. Date. Greenwich Civil Time. Where taken. Projected Area of Area Corrected for Fore- shortening of Mean Longi- tude of Group. Mean Latitude of Group. Longitude from Central Meridian. Umbra. Whole Spot. Umbra. Whole Spot. '9 IO -a Jan. 18-169 D O '3 O 49 129-5 - 8-6 -83-1 19-241 D '5 84 18 IO2 I32-5 - 8-3 -66-0 20-181 D '9 83 16 6 7 1337 - 8-0 -52-4 21-146 D 28 I 10 18 7' 134-2 - 8-0 -39-0 22'20I D 34 194 '9 108 134-0 - 77 - 2 5'5 23-192 D 47 203 24 104 '34'3 - 7-8 I2'I 24-174 D 65 259 33 129 I33-9 - 7'9 + 0-4 25'523 G 39 202 21 108 I35-3 - 7'' + 10.-6 26-209 D 40 I6 7 23 96 135-8 - 7'2 + 29-1 27-508 G 22 118 16 86 136-7 - 7' +47-1 28-501 G 18 89 18 89 137-0 - 7'i +60-5 29-149 D 13 58 18 79 137-0 - 7-i + 69-0 30-153 D 6 21 23 77 137-5 - 7'3 +82-7 Means ... '9 90 13472 - 7-62 ... FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 5 Changes in the apparent latitude of a spot-group may arise from three causes : (i.) Errors of observation, or of measurement; particularly such as would introduce error in the determinations of the orientation of the photographs. (ii.) An actual motion of the group upon the Sun's surface. (iii.) An error in the adopted position of the Sun's Axis. The errors of measurement are naturally treated as accidental errors. The orienta- tion error is of a quasi-systematic nature, but as seven different observatories are involved with no less than ten or twelve different instruments, arid as adjustment plates have been frequently taken, this error will tend to diffuse itself as an accidental error. As regards the proper motions of spot-groups, these are undoubtedly often large ; but there is no reason to suppose that either the direction or the speed of proper motion is in any way associated with the position of the Earth in its orbit round the Sun. The proper motions of spot-groups are, therefore, regarded as of an accidental character, as far as the present investigation is concerned. If I, the assumed inclination of the Sun's Axis, requires a correction A I, and N, the assumed longitude of its ascending node, a correction AN, then, writing y= A I, and x= AN sin I, the deduced Jatitude, I, of a spot will require a correction x cos 6 y sin , where is the longitude of the group measured from the Sun's ascending node. In the passage of a spot across the visible disc of the Sun, may in an extreme case increase by as much as 200 ; and if the Sun's Axis were alone in error, there would be a progressive alteration of the latitude given in the ledgers from which the quantities x and y could be determined. Thus, as above, let x = AN sin I; and / = AI; and let z be the true latitude of any group of spots. To determine x, y, and z, we have from each spot group, a system of equations x cos Oi+y sin ^ 1 + z = Z 1 , -y sin 2 +z l 2 , etc. a; cos 6 k + y ainO t +z l k , where l lt 1 2 , etc., l k , are the observed latitudes of the spot-groups as given for each day in the ledgers, and 6 1} 2 , etc., 6 k are the corresponding longitudes measured from the ascending node. In these equations the angles Q I} 2 , etc., are approximately in arithmetical pro- gression with a common difference whose mean value is about 14'2. Consider the simple case where has the thirteen values 0, 15, 30, etc., 90, which correspond sufficiently closely to a spot which is seen all the way across 6 POSITION OF THE SUN'S Axis, the disc. Let the probable error of each equation be e. Solving by least squares, we obtain the normal equations : z2 cos 2 0+2/2 sin cos 0+z2 cos 6= 2Z cos 6 withp.e. e ^2 cos 2 6 xS, sin 6 cos 0+y2 sin 2 0+z2 sin 6= 2Z sin 6 with p.e. N /2 sin 2 z2 cos 0+2/2 sin 6+z x 13 =2/ with^>.e. or 6a;+7'6z = a with^.e. 7y = fi withjp.e. t ^7 > 7 -63 + 132 = 7 with^i.e. t ^13 ) Thus y is obtained with a probable error of -7=, but x, from the way in which it is involved with z, with the much greater probable error, 0'8e. Thus as regards the position of the Sun's Axis four-fifths of the weight is concentrated in one of the normal equations, viz., that of y. Owing to the proper motion of the spots, the other normal equations are actually of greater value than would be inferred from the weights. They will be considered later. We next examine how nearly the y equation can be obtained without having recourse to a least square solution. Still taking the ideal case where Q has the values + 90, +75, +60, etc., 60, 75, 90; and writing the equations in order, we find by subtracting equation (13) from equation (l) : iia .. - and similarly r from (2) and (l 2) 2\ 3 ll/ >' / " \3/ )) \ ' N/2 in j ^ _L c,\ / I0 x 2\ t 4"~'ho/ " l~~ \T/ >' \* u / 5 ooy = i(/ 5 -g -J=. (5) (9) etc. Thus equations (1) and (13) give y with a p.e. of -7= ; equations (l) and (2) com- bined with (13) and (12) give l'966y with a p.e. of 77= \/z ; equations (1), (2), and (3) combined with (13), (12) and (11) give 2'832?/ with a, p.e. of -7- s/3 ; and so on. In this way y is determined with p.e. 707e using one equation at each end. ,, - 509e ,, two equations ,, 432e three ,, '400e four ,, 391e ,, five 403e ,, six ,, ,, and '378e ,, a least square solution. FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. Therefore, by combining the first five equations with the last five, a very close approximation is obtained to the accuracy of a least square solution, and by taking the first four with the la-st four, the p.e. is only increased from *38e to *4O. If the change of longitude of a spot be taken as 14 '2, the probable errors with which the displacement of the Sun's pole in a direction at right angles to the line joining it to the centre of the disc can be determined from spot groups extending over a given number of days are given in the following table. The probable error of an observation of latitude given in the spot-ledgers for any day being taken as unity, the figures in the last column give the probable errors obtainable from a least square solution, and those in the columns headed 1, 2, 3, etc., the probable errors obtainable when 1, 2, 3, etc., equations at the ends of each group are subtracted from one another. TABLE II. Duration of Group. I. 2. 3- 4- 5- 6. Least Square Solution. 1 4 days 707 JOS 426 389 '374 378 361 '3 710 'SIS 441 409 402 "4'5 387 12 722 '533 464 '439 '4-1 ' 467 420 I I 748 5 6, 498 482 '497 462 10 787 6O2 546 '543 '579 ... 517 9 845 661 616 633 ... 588 8 927 745 717 773 685 7 1-045 868 876 820 From examination of this table it was decided for groups extending over 14 or 13 days, to form an equation by subtracting the mean of the last 5 days from that of the mean of the first 5 days; for a group extending over 12 or 11 days to use 4 days at the beginning and 4 days at the end ; and for groups extending over 10, 9, or 8 days to use 3 days at the beginning and 3 at the end. It was further decided not to use groups extending over less than 8 days. Thus for a group extending over 14 days, in which the longitudes from the node and latitudes are denoted by l5 l lt 6 Z , I?, for each day of the group's appearance, the equation +sin is formed. As 1} 6 2 , etc., are approximately in arithmetical progression, an obvious simplification in the work is obtained by putting -^0080! + COS 2 + . . . +COS0 5 )=COSY(0 1 + 2 + . . . 6<\ X ( I + 2 COS I4'2 + 2 COS 28 POSITION OF THE SUN'S Axis, and similarly for the sines : i.e. the cosines and sines of the mean of the angles are taken and diminished by 6 per cent. Similarly, when 4 or 3 days are combined, the cosines and sines of the mean longitudes are diminished by 4 and 2 per cent, respectively. I. Determination of the Position of the Sun's Axis l>y Comparison of the Latitudes of a Group of Spots when near the East and West Limbs. The process actually adopted is shown in the following example : TABLE III. Spot Group 6806. Date. Longitude of Suu from Node. Longitude of Spot from Ceutral Meridian. Latitude of Spot. 1910. d . c Jan. 18-169 -8-6} 19-241 -8-3 20-181 447 o^ -S-ol 8-i2 21-146 -39-0! -8-o| 22-201 ~ 2 5'5) -77j 23*192 1 2'l -7-8 24-174 4 S'-8 + 19-6 .+ -T9 f -7'6o -7-1) 26-209 -f-2 9 M 7**' 27-508 + 47-I -To 28-501 52 -8 + 60-5 + 57 7 29-149 + 69-0 7-1 3''53 J + 82-7 -7'3, Therefore for the mean of the days, January 18 to 22, the longitude of the spot from the node = 44'7 - 53'2, or =351'5, and for the days January 26 to 30, = 52-8 + 57'7, or =110'5. We are led to the equations : 0-94 {a; cos 35i v 5 j/sin 35i*'5} 8-i2 = 0-94 (a; cos iio '5 j/sin i io" - 5} 7*-i4 = z which give by subtraction I-26 X-\- I"O2 IJ = + 0-98. The longitude of the Central Meridian from the Node has uniformly been taken out for the Greenwich Civil Time O d '4. In a few cases it has been found necessary to reject a group because of some sudden and violent change that had taken place within it usually in the nature of a fresh formation, which caused a sudden change in the position of the apparent centre of the group. Similarly the first or last day of the record of a group has been omitted, if it was clear from the change in its longitude and area that only part of the group was within the visible hemisphere on that day. An example of each case follows: FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. TABLE IV. Example of a Group of Spots rejected on account of Violent Change. Group 1587. A number of small spots irregularly scattered over a considerable area. The group becomes somewhat more scattered, and the spots decrease in area until they have passed the central meridian on February 7. The following part of the group then rapidly increases in size, and becomes more compact, the individual spots coalescing with one another until on February 1 1 the group consists of three large spots so close together as almost to form a single very large spot. These have broken up by February 13. The preceding part of the group has disappeared by February 1 1. Area Corrected Date. Greenwich Projected Area of for Fore- shortening of Mean Longi- tude of Mean Latitude iif Longitude from Opn teal Civil Time. Umbra. Whole Spot. Umbra. Whole Spot. Group. OJ Group. V^eillldl Meridian. I88 5 . d Feb. 1-387 2) 169 32 219 222-5 -14-7 -68o 2-457 39 294 32 248 222-3 -147 -54-2 3-220 28 3,3 '9 216 222-5 -14-2 -43-9 4 - 447 30 335 18 194 22 1 'O -'5'4 -9'3 5-500 68 245 37 130 219-9 16-0 -16-4 6-173 49 2 43 26 124 220-4 -16-1 - 7-o 7H99 85 646 44 335 2 l6'2 -i 8-6 + 6-1 8-153 ,76 1142 94 604 215-2 -i 8-6 + I3-7 9-480 214 1019 127 605 214-9 -18-5 + 3-8 10 509 176 888 125 619 2I3-8 -18-7 + 43'4 1 1-191 9' 809 75 66 1 213-7 18-9 + 5 2 '3 12-545 2 I 200 3i 291 214-6 19-0 + 71-1 13-288 O 57 o 200 217-6 -18-6 + 83-7 Means ... 5i 34 2 2I8-05 17-08 Spot-groups rejected on account of violent change appear in 'the Catalogue that follows, and their date of passage across the Central Meridian, their mean longitude and latitude are given, but no equation is formed for them. In the case of a group of spots visible for 8 days, where the first or last observa- tion has had to be rejected on account of the group being partly out of sight on either occasion, the group becomes practically one seen for only 7 days, and has, therefore, not been used, though it appears without an equation in the Catalogue. The photographs taken at Dehra Dun in the year 1905 have not been used after April 4 as a serious error was caused in the adjustment of the photo-heliograph in use there by the great earthquake that took place on 1905 April 4. A large number of days in the last nine months of 1905 are, therefore, practically without record, and several spot-groups of that period cannot be used in this investigation. Where one or two consecutive days are unrepresented the latitude of the spot-group and its longitude from the Central Meridian have been interpolated from the values given for the days immediately preceding and following the missing date. POSITION OF SUN'S Axis. 2 10 POSITION OF THE SUN'S Axis, TABLE V. Example of a Group of Spots for which the first and last days were rejected, as the Group was partly out of sight on those days. Group 1501. A large regular spot, a, followed by another large spot of irregular outline, b. Some small spots are seen between a and b. b has broken up by October 6 into a number of spots, which undergo frequent changes during the succeeding days. Area Corrected Date. Greenwich Projected Area of for Fore- shortening of Mean Longi- Mean Latitude P Longitude from Civil Time. Umbra. Whole Spot. Umbra. Whole Spot. tude of Group. 01 Group. Central Meridian. 1884., Oct. 2-412 5 217 107 464 20-3 + '4 ! 4 -77-6 3'459 152 790 192 995 15-0 + >4'3 69-0 4'435 176 1080 958 15-1 + '4'4 -56-1 5-141 210 1328 '55 973 '5'4 + '4'5 -46-5 6-274 223 1414 '33 846 '5'3 + '4'5 -31-6 7-522 297 1699 156 896 '57 + '4'3 -14-7 8-461 35' 1811 179 919 157 + 14-1 2-4 9-481 191 1896 99 980 1 6-0 + '4'4 + 11-4 10-293 '95 '53* 137 830 ,5-6 + 13-8 + 21-7 1 1-229 1 88 H73 112 882 14-7 + 13-8 + 33'2 12-186 125 9 2 775 15-2 + '3'5 + 46-2 '3'44 2 53 I 6\l 56 667 14-1 + 14-1 + 61-8 14-458 o 282 o 526 14-2 + '4'3 + 75'3 15-192 73 o 207 IO-2 + 14-1 + 80-9 Means 1 12 780 15-I8 + 14-18 In the following Catalogue, which contains all spot-groups observed for 8 or more consecutive days, the number of each group is given, the date of its passage across the Central Meridian of the Sun's disc, and its mean heliographic longitude and latitude as derived from the Ledgers of Groups of Sun Spots. The fifth column gives the number of days that the group was under observation, after the rejection of those days whereon the group was only partly visible, and after gaps in the daily record have been filled up by interpolation ; but the instances where an alteration has had to be made under either head are only few. In the great majority of cases the daily record was complete, and the group was fully seen on both the first and last days of observation. For the sake of convenience the apparent movement of the spot in latitude is considered in the three following Catalogues to be positive when it is in the direction away from the North Pole of the Sun. FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 11 TABLE VI. FIRST CATALOGUE OF GROUPS OF SUN SPOTS USED FOR THE DETERMINATION OF THE ERROR IX THE ADOPTED POSITION OF THE SUN'S AXIS. Latitudes of Spots observed near the East Limb compared with those observed near the West Limb. No. Date on Mean JVloftii No. No. . Date on Mean M No. of Group. Central Meridian. Longi- tude. Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. menu Latitude. 'of Days. Equation. 1874. o 1876. o o o 83 May 2 296 - 13-1 11 4- O72.e -24*7 = + 0-95 192 Jan. 23 240 I2'2 12 4- -22X + i-Qzy = + 1-63 5 6 247 - 4'9 1 1 + 0-58 - -38 = 4- 1-13 6 Feb. 17 286 - i3' 2 13 4- -48 + 0-53 =4-0-96 7 12 '57 - 6-9 12 4- 0*58 '51 = O'2O 9 Mar. 1 5 285 - n-8 10 4- -49 4- 0-16 =4- 1-30 9 3 279 + II-2 I I 0-08 -48 = 0-07 200 18 240 + H'9 4 June 20 13 + 10-9 I 1 - 0-57 - -38 =+ '35 i 2 217 - 6-4 10 4- -52 -0-34 =4-0-63 6 2 262 - 9-6 4 2 5 '54 4- i4'6 1 I 4- -40 0-65 = 0-67 5 July i 227 + 18-4 9 May 1 1 245 - H'3 9 4- 0-59 - 1-22 =4- 1-57 8 6 149 + i7 9 o'6i 1-23 = 4- i-oo 212 July 7 210 - 6-9 9 ,. 7 '39 - 5' 2 12 - 0-95 - 1-31 =+ 0-17 7 2 7 3'5 - 10-5 8 0-42 - 1-05 =4- 0-50 IOO i 102 - 10-5 13 0-88 1-32 = + 0-08 220 Aug. 24 301 - 9-8 8 1-16 4- 0-25 = -f- i'o6 2 '4 5 + 13-0 4 Oct. i 157 - 5'3 10 1-28 4- 0-83 = 1-90 3 2 33 + 18-4 II 071 1-25 = 0-23 5 12 18 lO'I 8 0-29 4- i -06 = 0-67 4* '9 347 + 6-2 9 '19 o - 66 = +- o'io 6 H 216 - 12-8 9 i -i 2 4- 0-72 = 0-44 5 2 9 216 + 6-6 12 - -24 - 1-05 = - 2-47 231 Dec. 23 145 4- 1O'2 12 + 0-61 4-1-48 =4-0-50 6 Aug. 3 153 + 9' 6 10 -41 0-46 = 4- o'4O 7 5 113 + II-2 12 '40 0-83 = I'2O 1877. O o 8 6 112 - 20-3 8 -15 0-33 = + c-io 232 Jan. 1 5 "95 + 9-1 '3 4- I- 1 1* 4- 1'ioy = 0-90 9 ., 6 104 - u-5 9 -27 0-40 = 4- 0-43 3 '9 '47 4- in 1 I 4- 1-22 4- 0-80 = 0-92 no 14 358 + 2-0 '3 -46 0-64 = 4- 070 4* Feb. 3 307 - 7'5 9 -fi-20 4- '82 =4-0-57 i 1 6 333 - 18-1 12 - "43 -074 ==-o-io 5 12 '95 + 9'i 1 1 4- 1-41 4- 0-45 =4- 0-37 5 2 4- 231 - '5' 2 II '45 O"22 = O'25 6 Mar. 4 299 + 77 8 4-0-95 4-0-53 =-0-94 7 -. 3 '54 + n-3 8 0-93 0-69 = "roo 241 Apr. 2 3 347 4- 2-0 8 3 '53 - 7'5 8 0-95 + 0-62 = 4- 0-26 2 26 310 - 7' 2 9 4-0-58 1-35 = 0-70 122 Sept. 20 230 - 13-0 8 ri2 0-17 0-30 6 Miy 13 85 + 8-7 8 4- 0-53 - 1-02 = 0-40 4 2 5 160 - 8-6 10 1-24 4- 0-87 = 0-90 7 22 3 2 4 + 9'3 10 4- 0-59 - 1-42 =4- 1-04 7 Oct. 4 44 - 13-0 13 i '40 4- 0-67 = 1-06 9 June 7 108 io - 4 9 4- 0-06 1-33 = + 0-17 130 18 219 + 8-9 8 0-76 + 0-80 = 4- 0-67 255 ; Aug. 28 104 + 8-5 10 1-25 0-84 =4- 0-26 i 20 188 + 8-8 9 1-24 + 0-54 = 4- 0-80 6 Sept. 9 308 + 8-9 9 - 1-31 - 0-32 =4- 0-77 4 Nov. 6 334 - '5'5 9 0-26 + 1-30 = 2-17 261 Nov. i 335 - 8-1 13 0-83 -|- 1-23 = 4- 0-22 5 17 184 + 7' 2 12 o'39 4- 1-62 = 0-40 4 28 335 - 10-3 12 - '45 + I- 55 =- '36 6 2 5 74 + 3'5 7 2 7 59 + i5' 8 0-89 + 0-68 = -f 0-80 1878. O O O 140 Dec. 14 186 + 6-5 10 0-04 +1-52 = i - 6o 271 Mar. 1 3 28 + 7'4 8 4- 1-06^ o'47j/ = 1-14 2 June i 64 + 8-5 ii 0-08 1-50 =4-072 1875. o o 7 Sept. 8 188 + 3'9 12 1-64 0-09 = 0-18 144 Feb. 6 198 4- 1 8-6 9 + 0-96*; + 0-84^ = 0-40 8 Nov. 3 .63 + 10-4 12 0-84 4- i -37 =4- 0-07 5 2 4 321 4- 1 8-2 '3 + -50 +0-34 = 4-0-08 6 2 4 321 - 11-4 1 1 + -42 0-06 = + 0-37 7 *8 269 + 4'6 12 + '59 + '3 6 =+ i'4 1879. o o 150 Mar. 1 7 47 - 37 I I + -46 o-oo = 0-45 279 Apr. 17 54 207 9 4- 0-452 \-iiy = o-io i 2 3 3 2 ' + 18-2 '3 + -52 0-37 =0-96 282 June 30 258 26-4 9 0-91 roo = 4- 0-36 4 Apr. 14 3' + 9' 1 1 + 0-97 - 1-17 = -f- 0-32 6 Sept. i 142 4- 2 8'5 II 1-43 4- 0-20 = 0-12 5 16 10 - 13-8 12 + 1-26 0-98 =0-50 9 Oct. 1 3 305 4- i 8-0 8 1-17 4-0-02 =0-93 6* 3 ' 82 - 6-3 I I + 0-85 - -15 = + 0-47 295 Nov. 1 2 267 22'2 12 0-62 4-1-48 = 0-42 7 May 2 '59 + 9-* 12 + 0-98 -28 = + 0-08 160 June 5 61 10-2 I I 0'22 -46 = O-JO i '9 247 + 6-3 9 -072 - -12 =+0'54 1880. O o 3 July 3 63 lO'I 10 0-30 -46 = 1-66 301 Jan. 8 241 + >9'4 12 4- '04* 4- i-24# = 4- 0-58 6 3' 47 + 8-3 1 1 1-23 0-89 = o'o; 8 Feb. 5 2 33 4- 2O-2 '3 -f- -36 4-073 =-0-98 7 Aug. 26 62 4- 8-8 9 i '04 0*84 = 0-30 9 5 233 - '5'4 12 4- -31 4-0-91 = 0-08 8 *7 48 + 7'3 1 1 1-31 0-65 = 0-82 310 9 184 + 2 7'4 I I 4- -16 4- 078 = 0-93 180 Oct. 30 285 + II'O 10 - 1-07 4- 1-09 = 0-34 2 ,, 2 7 301 - 28-8 '3 + 'S3 4- 0-22 = 0-80 2 NOV. 2 I i - 6-4 10 4-0-26 4-1-50 =2-30 7 Apr. 4 '74 4- 18-3 I I 4- -29 - 0-75 = 1-02 4 2 4 309 - 7' 2 1 1 - 0-19 4- 1-44 =_ r8 7 320 3 186 4- 20-9 I I 4- 0-94 - 1-17 =- 1-42 5 ,, 2 7 286 + n-s 8 0-85 4- 070 = 4- 0-30 i May 8 89 4- 26-0 '3 4- 0-58 1-44 = 0-42 9 I >ec. 2 1 3*3 - 11-5 10. 0-15 4- 1-52 = 1-80 6 3 158 4- 14-2 12 + 0-22 1-59 = 1-16 12 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- T M .f" tudt. Latitude. of Days. Equation. of Group. Central Longi- Meridian. tude. Mean Q f Latitude. Days- Equation. 1880. o o 1881. o o 33 June 20 233 + 23-4 9 + 0-072; i'34# = 0-06 494 June i 8 121 22-3 9 + 0-13^; -322; = 4- 0-36 i 22 216 + 25-1 9 4- 0-40 1-13 = 0-84 5 17 I 4 I 19-1 8 0-44 -16 =4- 0-63 2 23 200 - 21-8 12 0-35 1-56 =+ 2'oo 6 \ 21 84 26-8 1 1 4- 0-03 '48 = 0-30 3 July 3 6 9 - 36-9 I I 078 1-20 = 0-45 501 3 33' + 267 '3 - '4 - '5 2 = - i'3 6 7 15 2O'2 8 0-80 0-88 = + 1-17 2 j July i 320 , + 27-9 9 + 0-25 -29 =4- 1-50 8 21 181 + 22'4 8 ii 0-27 = 2-04 4 June 30 319 + 127 8 0-44 -oi = 0-56 34 2 Aug. 7 3 2 3 + II'9 12 -54 0-54 = 0-60 5 Julj i 310 + J5'i 8 0-29 -12 = 0-30 3 '4 2 35 + 24-6 13 - '49 - '43 =~ i -0 6 3 282 + 23-8 10 0-40 -40 = 0-83 4 H 226 - 1 6-6 12 - -54 -0-47 =-0-95 5ii Jo 194 4- 16-8 9 0-17 '37 = + o-2o 5 IS 213 + 21-5 13 -42 0-62 =o-88 5 9 203 + 14-8 12 0-96 -39 = -f- 1-24 6 '5 214 19-0 12 -35 077 = 0-20 6 '4 142 19-6 II 0-92 + -12 = 0'22 35i Sept. 3 3 2 7 + 10'2 12 : -61 o'2o = 0-50 521 22 3' + I3-3 4 10 230 + 25-1 10 '42 0-50 z*=+o-io 2 H 9 + ] 9'4 12 '04 I'22 = 070 5 9 239 -17-8 ii -48 +0-28 =0-30 5 28 319 + 24-1 12 - -40 4- 0-79 = + 0-35 7 ii 220 - 1 6-8 10 -50 +0-36 =+0-56 6 2 9 37 + 2 7'i '3 -27 - 0-86 - 0-88 9 13 190 + 22-1 12 "60 O'OJ = 0'22 8 2 9 3i ! - i5'4 9 -03 0^87 = + 0-30 360 20 101 + 16-2 8 - -19 -0-13 =4-0-37 531 29 299 4- 187 8 '18 0'I2 = 1-36 i 21 9 + 177 10 -49 0-07 =+0-33 2 30 292 | + 187 8 -08 0-27 o'66 4 23 65 + i9'3 10 '48 4-0-40 =+0-07 8 Aug. 7 1 80 + 12-9 '3 '33 ' 8 3 = + 0-32 7 28 355 20'I 8 0-58 +0-90 = 4-0-80 549 26 293 + 28-4 13 -52 0-26 = o p o8 8 2 9 34i - I7-9 12 , -34 +077 = 0-24 . 55 28 272 + 13-4 8 0-88 0-69 = + 0-13 9 3 33i - 19-2 10 -40 +0-48 =0-27 2 28 266 + 14-8 12 -61 0-07 = o - i6 37 3 324 + l6'4 ii -28 + 0-81 = + 0-27 3 ,. 28 263 4- 20-4 12 -59 o p i6 = OMO 380 Oct. 1 8 92 + 23-9 12 -30 4- O'90 = I '03 56, Sept. 4 179 25-2 12 '6l O'l I = 0'17 i 2 63 + 21-2 12 '34 + 0-90 = + crio 6 IO 101 + 13-6 10 -45 4- 0-49 = + 0-60 2A 25 359 210 I I '24 4" 0-82 = O'2O 57i 18 352 + 17-6 13 -50 + 0-40 = 0-68 39 2 Nov. 1 7 56 + 21'9 1 1 0-09 4- '47 = '28 2 18 347 4- 22-9 12 - -49 + 0-46 =- 1-04 7 2 9 254 + 207 1 1 0-26 4- -45 = + 1-50 4 24 1 263 4- H'6 10 -50 4- o"i2 = 4- 0-40 400 Dec. 8 135 - 3'9 ii 0-04 4- -51 =0-48 5 z 5 ; 257 + 20-8 13 -49 + 0-52 = 4- o'6o i 21 321 + 24-0 8 + o-oi + -18 = ri3 6 Oct. i 170 + 14^ "3 -48 + 0-48 = + 0-56 2 21 325 + 137 9 -0-05 + -34 =-0-07 581 5 129 2O-2 10 - -14 + 0-95 - 0-37 3 27 250 + 20-6 12 +o-45 + '53 = + 0-38 6 12 39 + H' 12 -34 +0-93 =4-0-24 6 31 190 - 31-1 II 4- 0'8O + 21 = 40-2O 9 ,- 20 289 + 16-0 13 -09 4- -ii =+ 0-32 590 22 262 + H' 2 13 -06 4- "'3 = 1*26 l88l. o o I 22 262 + 21-0 1 1 1-22 + 79 = '17 407 Jan. 8 91 + 25-3 12 + 1-033; 4- \-\iy = o-oo 2 22 260 - i9'5 12 -0-97 4- -25 =4-0-53 4IOD 25 236 - 18-6 8 + I'I9 +0-22 = 0'73 4 23 249 + 20-6 8 0-14 4- -10 = 1-14 3 Feb. 2 116 -16-5 8 4" 0-62 4- PO3 = 0-20 8 Nov. 8 4i + H'3 12 0-82 4- -40 = o-io 5 6 7 2 + 19' 12 4- 1-41 + 0-82 = + 0-38 6O I 12 34 1 - 1 1-8 8 0-90 4- 0-83 = i -06 7 8 43 + 18-1 8 + IM4 4- O-07 = 0-26 3 .. i 6 289 + 16-0 II -0-54 4- '4' =-0-07 9 12 354 + I5'9 12 + I'47 4- 0-64 = O'20 6 20 2 33 + 174 1 1 -0-15 + -47 =4-0-85 4^3 20 2 45 + 20-1 13 + 1-51 + 0-33 =- 0-18 7 21 221 + '0-9 12 0-32 + -56 = 4- 0-97 4 2 240 20-3 14 + 1-65 +0-29 = + 0-48 9 .. 2 4 181 - I5-3 9 i-o'35 + -32 =-o-2c 5 ,. 2 3 202 - '5'9 9 + 1-42 + 0-29 = i-oo 614 Dec. 4 60 - 19-4 13 0-26 4- '52 = 0-64 6 25 '75 - '4'9 8 + 0-97 +0-62 = 4- I'oo 9 6 26 + 2 47 1 1 + 0-31 + -46 =4-0-72 8 Mar. 8 37 + 20-4 8 4- no +0-29 = 0-24 621 IS 271 + 26-6 8 0-46 + ' 2 = + i'i 43 H 3ii + 14-5 9 4- 1-28 +0-48 = 0-07 5 H 282 + 16-5 8 0-27 + -ii =4 0-04 i H 312 2I'O 12 4- 1-67 0-06 = 1-07 7 17 247 + 2 7'5 13 + 0-42 4- -50 = - 1-40 3 12 34 + 2I- 5 9 + 1-30 - 0-54 =+ i'i7 8 17 238 + 16-4 1 1 4- 0-20 + -48 = 4- 0-68 6 17 267 -16-3 12 + 1-63 - 0-37 =- 0-15 634 2 7 I 08 -z6- 3 8 4-0-93 +070 =- 1-44 7 18 257 + IO'I 9 + I'34 + OM2 =+ 0-67 9 2 i 224 + H'Q 8 + 0-84 0-70 = + o-io 45" Apr. 9 336 + 22-2 1 1 + 1-27 0-62 = I'22 1882 O 3 H 271 -14-6 13 + 1-32 - 0-82 =- 174 638 Jan. 3 21 + 15-5 9 4- 0-922; + o-gSj/ = 4- I'oo 5 H 264 - 2 3-4 9 + 0'S3 - -25 =- 1-40 648 H 238 + I4-5 8 4- -i i + 0-24 = + 0-56 460 22 1 60 - 17-1 10 + 0-86 -27 = 0-20 650 ; i 8 188 + iS'4 ii + -13 4-0-97 =4-0-40 i 23 150 + 7'4 ii + 0-93 - -24 = + 0-50 3 ,. 2 4 98 - i7'4 1 1 + -03 4-1-04 = 4- 0-27 472 May 1 6 206 + i3'9 1 1 + 0-35 -46 = 0-65 8 3 19 | + 16-1 12 + -36 + 0-87 = O'lO 481 24 90 -27-6 9 0-24 -30 = 0-87 664 Feb. 7 286 137 I I 4- -52 + 0-46 = 4- 0-58 2 28 5 + 2O'O 9 0-32 -30 = 0-40 6 8 257 : 4- 12-5 9 4- -22 4- '82 =+ '33 5 June 2 34i - 97 1 1 + 0-34 - -44 =- 177 8 10 236 + 8-0 ii + -40 + 0-65 = + 0-95 7 5 288 + 22-3 12 + 0-07 - -53 =- 1-55 670 15 172 ! + 107 ii + '47 4-0-44 =+0-33 9 | H i79 + IS"! 10 0-05 -47 = i'oo 2 ! 17 137 -.18-8 13 + '55 +0-31 =-0-58 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 13 TABLE VI. continued. No. Date on of Central Group. Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. No. r !*", of Latitude. Days Equation. 1882. o o 1882. o O o 677 Feb. 20 102 - 17-8 1 1 + -36* + 0-39^ = - 0-12 872 Oct. 3 1 5 - '97 8 o-oiz 4- my = 0-13 8 21 97 20-0 I I + '35 + '54 = - ' 8 6 Nov. 9 237 - i9'3 13 0-61 4- i '43 = ' 2 4 687 Mar. 5 294 - I2- 9 '3 + '57 + 0-02 = 0-96 7 ' " 217 - 23-4 | 12 0-60 4- i -49 =4- 1-37 691 ;, ii 222 - 0- 5 12 + -65 0-14 = 0-04 8 '2 208 4- H7 9 roo 4-o-So =+ 1-44 4 '3 '89 - '4'5 9 + '37 +0-15 = + 0-14 884 16 '49 - 7-2 9 0-86 + i -06 = 4- 0-70 5 '3 '85 + 9 '4 10 4- -50 + o-io = 1-16 5 18 121 4- 19-2 12 - 0-50 4- 1-55 = 4- 0-05 9 ., 17 135 - '8-3 ... 8 l, 21 90 - 8-0 702 22 75 22'I '4 + -60 - 0-45 =- 172 9 21 83 4- 10-8 12 0-32 4- i "60 = 0-32 5 ii 27 3 - I'3 12 4- -58 0-37 = o-oo 890 25 36 - 22-9 13 0-25 4-1-50 =4-0-86 9 Z 4 5' + n-5 8 + 0-56 - 0-98 =+ 1-43 i 2 7 4 - 207 9 0-60 4- n6 =4- 1-07 711 , 30 322 I2'0 10 + '37 - '82 =- 1-93 2 27 3 + 13-1 9 0-66 4- 1-19 = + '8o 3 A l"'- 3 267 + 25 4 4 8 4- -16 0-07 = 0-64 4 z8 35 - 8'3 10 0-17 4- 1-49 =4- 0-14 6 6 233 - 191 10 + -33 -0-64 --0-94 5 3 33' + 157 9 0-69 4-1-08 = o'io 6 Z34 + 19-1 10 + '33 -07' =+0-63 7 29 343 4- ii-o 8 224 + 1-2 3 + '22 - 0-97 =- 172 907 Dec. 12 1 66 + 10-8 9 - o-oi +1-34 = 1-07 720 8 ; 204 - 9 -0 9 + 0-95 0-97 = 2-20 8 16 120 + 177 ... 2 II 161 4 20-8 12 + 1-25 i -02 = 0-56 914 25 3 - I4-3 ... 6 16 93 - 19-3 925 3i 284 28-4 8 4-1-02 4- 0-53 = 1-04 9 '9 65 -28-5 13 + i-oi 1-15 = + 0-34 8 13 43 - 18-1 8 + 0-54 no = 0-67 1883 o O O 733 '9 62 - i3'4 10 + O'gi I - 22 = O"l6 920 Jan. i 270 - '4'3 13 4- 0732; 4- Hoy = + '3 2 4 22 23 + ii'3 12 4- i -2 1 1-09 = 0-94 6 4 232 lO'I 9 4-0-42 4- -31 =4-0-73 5 2 3 7 - 10-7 12 + 1-24 1-03 = 0-80 7 5 214 - I7-9 13 4- 075 4- -38 =4- 0-64 744 May 7 177 + 23-1 '3 + 0-84 - 1-30 = + 0-34 9 6 204 2I'O 8 0-04 4- ''4 =4- 0-03 6 8 167 + 24-2 9 4- i -08 0-68 = 170 93 6 194 + 5-o 1 1 4- 0-6 1 4- -40 =4-0-35 9 9 156 + 20-9 12 + 0-85 1-36 = 0-87 3 '5 76 - 9'i 12 -4- i -oo 4- -26 =4- 0-85 752 10 141 - 4'5 I I 4- 0-69 1*42 = 0-50 4 18 49 + 13-5 12 4- i -06 4- '22 = 4- o-oz 4 12 I 10 + '3-7 I I 4- 076 - I'33 = + 0-12 8 2I 7 - 10-4 8 4- 0-55 4- -03 =4- roo 9 17 52 - 29-2 '4 4- 0-30 1-56 = 4- O'gS 94 i 28 2 75 - 27-2 '3 4-1-28 4- 0-83 = 0-46 760 18 37 + 10-6 10 + 0-94 1-27 = 0-20 6 Feb. 2 21 I - 19-5 8 4-0-51 4- i-oi = 4- 0-47 2 20 16 - I5-3 '3 4- 0-29 1-52 = 1-30 954 6 I 5 6 + 11-3 13 4-1-42 4- 0-66 = 4- 0-54 5 3' 230 + '4'3 '3 + o-oi - i'57 = ''26 5 .. 4 177 - 23-0 8 4- 1-03 4- 0-51 =+ 0-33 7 June 4 168 + 21-2 12 + '35 ''54 = + ' 66 9 I' 9 2 + 47 8 4- 0-94 4-0-77 =4- ''4 6 777 H 38 - 12-5 12 - 0-41 - 1-59 =- 0-27 961 13 58 - 177 '4 4- 1-60 4- 0-46 = 0-08 780 19 332 + 22'2 I I 0-29 1-37 = 0-65 3 10 102 - 54 8 + i -2 1 4- o'02 = 4- 0-46 3 28 212 + H'6 10 0-32 1-48 = 4- 0-50 4 16 16 -t- 7'5 12 4- 1-53 4- '4 6 =+ 007 5 29 197 + 10'3 I I 0-83 1-28 = + i -08 7 18 353 - 157 8 4- i -08 4- 0-53 = 0-30 7 26 246 - '9 - 3 8 - 0-97 - 0-54 = + 0-23 97' 26 247 - 12-4 , 9 4- 1-33 - 0-46 =- 0-53 8 J uly i 169 - '4'9 10 - 0-32 1-50 = 0-83 6 Mar. 1 3 49 4- 15-8 10 4- 1-53 + o-oi =4- o'57 9 3 '44 - 4'5 10 - 072 1-34 = O'o6 8 16 17 I2'9 12 4-I"59 0-23 =4-0-22 79 2 4 139 - 5'2 8 070 0*87 = + OMO 980 '7 357 + 13-1 10 4- 1-46 0-05 = 4- 0-53 7 '9 293 + '4'4 12 - '14 1-16 = 4- 0-24 i 22 297 - 8-0 12 4-1-57 0-40 =4-0-02 802 22 256 - 197 IO - '20 0-96 = 4- o'zo 2 22 292 -18-3 8 + 1-16 0-49 = 1-70 8 Aug. i 123 - H7 I I '26 0-94 = + ''50 4 25 251 - 24-1 10 4- 1-17 0-99 = 0-30 811 10 9 + ! 9'9 8 -07 4- 0-26 = 4- '44 5 3' '72 - 8-2 12 4-1-38 0-83 = 4- 0-14 . * '5 297 + I5'3 12 - '33 - 0-85 = - '45 7 Apr. 3 ; 135 + '3'4 13 4- i '37 o~8o = 0-24 6 2 3 190 + 13-2 12 '59 0-34 = 4- 0-02 8 4 I2 4 - '37 I I 4- 1-42 0-50 =4- roo 821 28 129 I I'2 12 - - 55 -o'44 = + 0-40 991 6 102 + 2-9 9 4- 1-26 0-65 = 1-30 2 27 H' + ii'3 8 - -09 0-33 =4-0-13 2 6 9 - 17-0 12 4-1-36 - 0-96 = 1-37 7 Sept. 6 3 + 20-5 12 -56 0-39 = 0-40 6 ii 35 -13-6 8 4- 0-92 o - 66 = 0-43 833 7 353 + 7'6 I I -51 0-03 = 1-27 8 '4 352 + 117 10 -)- 0-99 -ii =4- '6o 8 '9 '99 + H'4 12 -63 4-0-15 =4-0-42 9 17 35 - 22-4 12 4- 1-14 - -15 = - 0-90 845 29 67 + 21-3 10 -50 4- 0-06 = 0-14 IOOO 18 34 16-0 1 2 4-1-18 -13 = 4- 0-90 6 3 5 - 217 12 -39 4- o '72 = 4- 0-60 I '9 282 - 16-1 12 4- 1-34 -oo = n6 7 Oct. i 4' + '9'4 I I -41 4- 0-28 = 1-43 4 ,, 20 268 - 5'2 9 + '43 - "34 -- '76 8 i 35 -28-9 13 -46 4-0-51 = 4- 0-26 8 *8 173 + 77 12 4- 0-90 -34 = 0-06 9 ' 32 + 7'2 I I -28 4- 0-73 = o-io ion 3 140 4- i3' 850- 5 349 + 6-6 8 -15 4- 0-18 =4- 0-20 IO2I May 10 10 - 18-2 ii 4- 0-85 -19 = 0-18 6 16 203 + 12-5 '3 '22 4- '1 = ' 2 7 15 301 - 22-3 13 4- 0-52 -47 = o-oo 7 ,, '9 164 + 1 8-6 12 - -35 + -oo = 0-62 8 16 292 4- i i-o 12 4- 0-57 -51 = o-oo 864 22 124 + '97 9 - 0-36 4- -29 =4- 0-4*0 1039 June 5 16 + I4-5 '3 4.0-16 -55 = 0-50 8 28 43 - 22-4 '3 0-97 4- -21 =4-0'l6 1041 8 347 10-9 9 4- 0-46 -22 = 4- 0-60 870 Nov. 2 333 + 1 6-0 '3 I'O2 4- "22 = 0-24 2 7 353 - 8-2 8 4-0-15 -12 = 4- 0-03 14 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1883. o o o 1883. o o . 1043 June 9 327 - 16-4 9 4- 0-59.*; - I-I4?/ = + 0-13 I2OO 1 Dec. 14 5 1O'2 ... 5 6 15 - 11-5 8 0-54 i-oi = 0-30 2 H ' 4 12-5 12 + 0-232: 4- '6527 = 0-24 6 12 294 - 23-2 12 0-14 1-60 *= 4- 0-73 5 17 331 + 21-1 13 4- 0-40 + '49 - i -i 8 1052 18 213 - 24-4 8 0-88 0-73 = 0-60 6 17 332 - I7-0 4 23 144 -15-8 12 - 0-31 1-57 =+ 0-70 1212 25 228 - 8-8 I 1 + 0-25 4- -47 - 0-03 6 21 170 10-2 8 -0-92 -0-73 =-0-57 3 25 219 13-0 IO 0-15 4- -47 = 0-60 8 28 75 - 97 ii 0-47 1-41 = 4- 0-02 5 26 21 I 4- 8-2 10 + o-oi 4- -47 =- 0-13 1062 July i 36 4- 10-5 13 0-63 i -45 = 1-08 6 27 2O2 - 9' 2 9 o'02 4- -23 = 0-23 6 9 290 22'6 1 1 - 0-42 1-40 =4- 0-62 7 27 2OO '3 4- 0-64 + -45 =+ 0-08 7 IS 212 26-0 13 0-93 1-23 = 0-04 8 27 I 9 4 - 1 6-6 13 4- 0-49 + -50 = - 0-44 8 H 224 - 9-8 1 1 1-19 1-03 =- i-io 1071 18 177 II-O 10 0-59 1-39 = 0-50 1884. O o O 4 21 133 - 15-2 13 i -iz 1-16 =4- 0-72 1225 Jan. 2 114 - 15-0 9 4- o'2ix + I-342/ = + 0-40 5 19 155 - 10-5 9 -07 - 0-88 = 4- 0-40 9 3 IOI 4- 11-3 8 + i -oo 4- 0-59 = 0-33 9 2 3 I I I - 157 10 -27 0-82 = 4- 0-60 1231 7 47 - 13-0 12 4 0-94 4- '37 - 0-50 1080 2 5 74 9-5 13 -04 1-16 =4- 1-26 2 8 37 4 10-9 13 4- 0-84 + -36 = + 0-70 6 28 42 + 9-2 10 -29 0-76 = 0-30 3 8 - 10-7 8 + o-io + -15 =4- 0-23 1092 Aug. 1 3 194 16-9 9 -88 0-93 = 4- 0-67 5 10 13 + H'9 4 H 178 - 10-3 i,3 '4 6 - '57 =- i'4 7 n 356 10-9 13 4- 0-84 4- '34 = - 0-42 5 H 173 + 11-4 9 -26 0-60 = 0-44 1243 12 346 + 12-5 9 + 0-52 + -29 =4- 0-36 8 ) * I 89 -16-4 12 -54 0-49 = o-io 1251 '9 256 18-0 13 4-1-15 + -09 =4- 0-26 1103 26 16 - 15-2 12 - -54 -0-54 =-0-58 4 21 222 - 0-3 9 4- 0-91 4- -03 = o-io 5 z6 18 + 20-6 8 -09 4- 0-52 = + 0-80 5 23 208 - 8-5 I 2 4- 1-25 + -04 = + 0-35 6 3i 316 - 9-0 IO - -58 4-0-13 =-0-17 6 203 '3 4-1-27 4- 0-96 = 0-32 8 Sept. 3 273 - I5-5 IO - -49 4-0-13 =4-0-67 9 28 138 - 16-8 9 4 254 19-0 12 -60 o-oo = 4- 0-87 1260 27 142 + 6-3 1 1 + i'33 + 73 = - 0-25 I I IO 7 219 4-n-o 12 -63 O'lS = 0-22 i 30 108 4 9-8 10 4- 0-84 4- i-2i = 0-26 4 13 133 - 21-8 13 -50 4- 0-38 = 4- 0-80 4 Feb. 2 75 4 107 12 4- 1-36 + 0-86 i - 1-18 7 16 98 +11-3 9 "26 0-46 = o - 8o 6 4 43 + 8-5 13 4- 1-38 + 0-77 =+ 1-04 9 18 75 + 10-8 12 -60 4-0-14 = 0-80 7 5 27 24-5 13 4-1-35 4-078 = o - zo I 122 H 131 - 87 8 -78 4- o'86 = 0-94 8 5 23 + I3-5 12 4-1-44 4- 074 = 0-52 6 Oct. 2 249 -18-7 13 -41 +0-65 = 0-62 9 7 8 + 12-7 8 4-0-62 4-0-95 =4-0-10 1130 8 177 - 67 13 -24 4- 0-97 = 0-20 1271 10 329 + u-8 12 4 1-50 4- 0-65 = - 0-74 2 . 1 '45 - 57 1 1 - -24 + 0-83 =4-0-75 3 10 325 4- 14-0 3 izg - 22-4 13 - '33 + 0-83 =4-0-14 7 15 255 + 7'4 I I + i '42 4- 0-50 = 0-20 4 12 114 4- 10-9 12 -54 4- 0-70 = 4- 0-28 1281 16 240 - 10-5 9 4- 0-88 4-1-02 = + 0-40 6 12 iz4 - 16-2 II -14 + 1*02 = 0-38 4 19 208 - 97 13 4- 1-53 4- 0-26 = - 1-16 7 12 in - 12-8 10 - -43 + 0-58 =-0-23 8 ,, 21 177 + I3-5 12 4/ i'66 4- 0-14 = 4- 1-23 8 12 124 4 n-8 10 - -02 4-1-18 =4-1-40 1291 23 152 + 8-1 ... 1 140 15 81 + 15-8 IO - -42 +0-51 =-0-73 5 29 74 + 12-3 10 + 1-37 4- 0-59 = - 0-13 4 18 35 - 9-8 12 - -13 + -14 =4 0-47 6 ,. 28 79 - 137 9 + i'37 + 0-25 =- 1-76 9 24 324 - n'5 10 - 76 4 '37 =4 i'23 7 2 9 67 4- 7-6 9 + 1-28 + 0-55 =+ 2-83 1152 27 282 4 14-8 IO -28 4- 0-80 = 0-40 1301 Mar. z 4 10-4 12 + i'57 + 0-38 =+ 0-28 4 29 254 - 6-4 12 -15 4 '14 = 0-15 2 i 55 - 87 ii +1-48 0-19 =4- 0-25 5 30 237 7-1 IO -ii 4- 'oo = 0-47 3 4 20 26-7 13 4-1-56 o-o i = o-oo 6 3 224 - 9-8 12 - -16 4 -14 = + 0-53 7 8 324 + 10-3 10 +1-51 4-0-16 = -03 8 3 230 4- 22-3 10 0-29 4- -42 = 0-47 8 9 319 - 9-6 10 + i -52 4- 0-27 - - -27* 1161 Nov. 3 185 + 3-2 I I 0-91 4 '22 =4- 1-30 1310 12 268 -167 13 4 i -60 0-06 = 0-22 3 2 207 - ii '3 9 -0-37 4- -39 =-0-83 i 12 266 - 7'8 10 4- 1-50 4-0-15 = -13 5 7 133 io'6 9 1-17 + 0-65 = 0-83 4 15 *33 + H'5 ii + 1-43 4- o-io = -32 6 7 132 4- 10-7 10 1-24 4 0-94 = o-oo 7 13 255 - 12'5 9 4- 1*26 0-42 = -40 9 8 119 - 23-3 12 0-99 4- -28 = O-02 1320 17 208 - 97 13 + 1-52 - 0-37 =- 0-58 1172 13 48 - 14-9 II 0-38 4 '38 =4 0-17 2 18 199 - 14-1 8 4- i'io 0-23 = 4- o-io 3 H 35 - 8-8 12 0-53 4 '49 = o"o6 3 18 189 + 13-5 ii + i'35 0-56 = 2-00 7 >9 332 - 137 '3 0-54 4- '46 =4- 0-30 4 19 1 80 + 7'S 12 4- i '50 0-57 = 0-64 1 1 80 '7 i I2'0 8 4-0-30 + -17 =4-0-04 133 24 122 - 87 12 + 1-53 0-52 = + 0-17 i 19 33i + 17-8 10 0-04 + -55 = o-oo 6 28 6 9 I I'Z ii 4- 1-44 - 0-36 =- 0-75 4 2 5 253 - I2'3 8 0-67 4 '92 =4 0-40 1342 Apr. 4 333 9-0 12 + 1-48 0-68 = 0-15 7 27 226 10-9 ii -0-35 + -42 =4-0-75 3 i '9 10-3 8 28 217 10-5 13 -0-25 4 -54 =-0-56 7 8 285 - n-6 13 4- 1-18 1-05 =4- 0-30 1 191 ,, 2 9 209 + 9-4 8 4 0-38 4 -09 = 4- 0-23 i?5 9 268 - 17-1 '3 + 1-24 - 0-97 =- i- 4 o 7 Dec. 1 1 47 - 13-2 12 4 0-36 + '60 = 0-94 i 9 267 - 12-9 13 4- 1-26 0-94 = 0-18 8 12 34 - 97 13 40-19 + -55 =40-44 2 9 259 -13-8 8 -|- 1-17 0-19 = 1-40 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. TABLK VI. continued. No. of Group. Date on Central Mfridiau. Mean Longi- tude. Mean .Latitude. No. of Days. Equation. No. of Group. Date on Mean Central Longi- Meridian. tude. Mean Latitude. No. of Days. Equation. 1884. o o o 1884. c o o 1355 AI>!-. II 241 - 17-9 9 4- i -303; - 0-56^ = - 0-24 '532 Nov. 10 2 99 - 8-2 ... 6 9 261 20-5 9 +o - 66 i'i 5 =+ 1-04 1541 21 '59 + 77 10 o-6oa; 4- -42^ = 4- '24 8 15 183 + 8-9 2 22 142 - 7'3 II o-io 4- -48 = 0-15 1360 '9 129 - 9'i ii 4-1-32 070 = 0-60 6 Dec. 4 35o + 37 12 0-20 4- -66 =4- 0-90 3 z 118 - 9'5 12 4- i-oo 1-32 = 0-60 7 2 13 + 13-5 10 4- 0-42 4- -43 = - 0-73 8 24 66 - 20-5 8 4-1-15 0-28 = 0-30 9 'I 259 + 4'8 I I 0-15 4- -47 = i-oo 9 25 57 14-0 '3 4- 0-93 -30 = o-oo '553 '4 2l8 I 2' I 9 0-09 4- '46 = 0-64 1371 27 25 10-6 12 + 1-14 -14 = 4- 0-40 6 '9 H5 7-o 12 4- 0-41 4- -56 = - 1-15 3 May i 334 - 15-2 12 4-075 - -47 = + 0-85 7 18 171 - 19-1 8 + 0-56 + -06 0-50 6 9 233 + 97 9 + 0-19 -36 =4-0-33 8 23 102 13-2 1 1 4- 0-17 4- -46 = 0-70 1380 ,, 12 185 + 7- 10 + 0-87 -24 =+ 3-14 9 ,l 22 III +8- 5 IO 4-0-59 + -41 =-0-90 1 '5 '53 -. 7'5 13 +0-45 - -49 =4-0-34 1 561 26 57 + 87 12 4- 0-69 4- '44 = - ' 6 4 8 21 75 - 2-4 13 + 0-28 - -57 =-. + IM2 3 3' 356 4- r6 12 4-0-57 + -51 =-0-23 9 22 62 - I3-9 12 4- 0-46 -54 = - 1-47 393 24 2 9 - 9'3 13 ,4-0-38 -53 = 1-08 1885. o O o 4 28 337 4- 18-1 II +0-55 - -35 =-0-23 1566 Jan. 5 287 ~ 13-0 9 4- 0-773; 4- i-24// = - 0-47 5 28 334 - '5'3 '3 ,+ ''5 '54 =0-46 7 6 275 4- 12-2 IO 4- 0-68 4-1-39 = 0-80 6 2 9 33 - n'3 12 4- 0-24 -60 = i-i 3 1572 21 80 21-0 II 4- 1-16 4- 0-94 = 1-27 1400 2 9 329 + '5'3 10 -0-13 - -54 =-0-17 3 IS 109 - 5'4 3 June 5 238 + 8-1 8 4-0-33 - -n =-0-53 5 2 5 22 - 8-8 IO 4- 1-02 4- 1-15 = 0^83 4 5 232 -5-8 12 0-18 -60 = 1-57 8 2 9 325 + 117 9 + 0-78 4- i'9 = 0-40 5 6 223 - 16-2 12 4" O'O6 '64 = I '32 1580 3' 302 -13-6 '3 4- -31 4- 0-91 = 0-40 9 " '52 - 6-6 II 0-16 -49 = 1-05 6 Feb. 4 2 47 + 1-6 12 4- -48 4-071 = 1-30 1410 16 80 2-3 IO 4-0-02 - -54 =4-0-77 7 6 218 - 17-' 4 20 3' - 8-2 12 0-22 -60 = 4- Q-66 9 5 2 4 2 - 4'4 9 4- -36 0-12 = 0-74 6 22 4 + I2'0 1592 '4 116 - 6-0 13 4- -45 4- 0-60 = + 0-56 9 July 2 238 I2'7 3 16 92 + 37 13 4- -51 4- 0-50 = o-i2 1420 2 240 + 9'3 IO - 0-27 - 1-45 =4- 1-53 4 '7 88 - 21-5 12 + '57 + 0-44 = 4- 0-27 i 3 222 + '3-5 12 0-92 i -3 1 = 0-92 6 '7 78 + -5 12 4- -62 4-0-31 =4- 0-20 5 8 '5i - 7'3 10 - 0-51 - i"39 =~ '5 1 60 1 18 72 lO'O 8 4- -16 0-25 = 0-90 7 '3 87 + II-5 12 - 1-14 - 1-25 = - 0-77 1612 Mar. 4 246 - 3'5 12 4- -64 4-0-13 =-0-38 1436 ,, 23 .322 - 6-8 9 1-07 0-82 = 4- 0-36 4 5 232 - i7'9 12 4- -63 4- o-io = 0-28 7 24 296 - 8-8 8 - 0-39 - 1-13 = - 0-56 8 1 160 - I5-3 13 4- -58 0-07 = 1-12 8 23 312 - 3-8 8 0-89 076 = 4- 0-36 l6 22 ,6 86 + 5'2 13 4- -55 -0-40 =4-0-40 1441 3' 2'5 +. 3'5 1 1 1-31 079 = 4- 0-90 4 '7 73 + 9'3 9 4- -32 4-0-29 =4-0-47 6 Aug. 4 '57 + 8-4 1631 Apr. i 237 - '9'9 '3 4- -48 0-47 = 0-18 8 9 92 + 13-1 2 ' 237 - 16-1 12 + "53 -0-71 =4-0-03 1452 9 90 + 6-5 9 - -37 + 0-02 = 0-63 6 7 '59 - 137 II 4- -31 -0-58 =4-0-33 3 H 28 - 5'9 13 -49 0-50 = o'io 8 ' 122 + I2'3 II 4- -28 - 0-75 =- 1-13 5 19 323 - 3'2 I 2 - - 5' -o'54 '58 9 '2 84 + 7'5 12 4- -27 - 1-09 =+ 0-84 8 22 277 + 4-' 8 154- 0-06 = 1-44 1643 21 322 - 4'5 12 4- -10 i - 2i = 0-07 9 23 260 2O'2 8 -09 0-28 = 0-17 5 25 272 16-0 '3 4- -07 1-17 = 4- 0-50 1463 26 225 - 8'0 8 0-74 0-83 = 4- 070 7 27 243 1 6-4 >3 4- -08 1-15 = owo 9 3' '55 - 10-8 9 -23 0-58 = 4- 0-03 '653 May 3 '7' lO'I '3 4-0-80 1-37 =4-0-30 1480 Sept. 1 1 '5 + 14' 12 - -62 4-0-35 =4-0-73 8 6 '33 + 11-8 12 4- 0-85 1-38 = 1-08 i '0 24 - 23-4 9 -28 4-0-31 =4- o-io 1661 7 119 4- 14-6 12 4- 0-83 1-37 = 1-80 2 '4 337 + 5'5 '3 - -58 4- 0-28 = 4- 1-18 2 9 9' + 4'3 12 4- 0-84 1-38 = o-io 4 18 287 + 4-6 12 - -61 4- 0-27 =+ 177 3 io 75 + '4"6 13 4- o'68 1-40 = 0-08 5 20 259 + '3'3 I I -45 4- 0-46 =4- 1-62 4 " 60 8-1 I I 4-0-69 1-34 = 1-68 6 22 225 +157 12 -59 4- 0-12 =4- 0-22 1670 20 301 4- 13-' II 4-0-15 - 1-55 =4- 1-30 9 21 238 + 7'' i 24 255 - 12-5 '3 4- o-2i 1-54 = o'6o 1491 24 201 - 7'3 10 -23 4- 0-89 =4- 0-67 2 24 254 + '3'9 '3 4- 0-24 1-54 = 0-06 5 2 9 '34 -13-5 '3 -49 4- 0-50 = 4- 1-82 3 I, 24 255 - 6 '9 10 4- 075 1-30 = r66 7 3 126 - 13-6 9 124- 0-87 = 0-26 5 23 257 - 15-8 9 4- 0-15 - 1-34 = - 0-90 8 Oct. 2 98 - '3'7 1 1 -39 4- 0-66 = 1-12 7 25 236 4- 97 12 4- o'i6 1-59 = 1-12 1501 8 '5 + '4'2 I 2 - -33 4-0-89 =4-0-50 8 26 227 - 17-1 '3 4- o'2i 1-55 0-84 8 20 216 - 8-9 8 - ''3 +0'33 =4-0-44 1682 29 185 - 7-6 10 4-072 - 1-29 =- 1-57 9 il 21 208 - 97 ... 6 June 3 125 4- 14-4 IO 0-29 i-ji = o-oo 1516 li 22 200 - 8-6 9 - 0-26 + 1-34 = + 0-30 7 3 117 1 2 '6 1 1 - 0-25 - 1-48 =4- 177 8 27 '33 - HI 8 1-08 +0-38 =+0-44 1690 i) 7 62 io'6 '3 4-0-07 - 1-57 =- 0-78 1520 28 120 - '4'4 12 1-06 +1-22 = 0-88 4 '2 357 ' - I4-5 12 0-27 1-60 = 4- 0-30 2 28 no - 6-2 9 0-64 4-1*13 = i-oo 9 18 288 - 7-5 10 4- 0-02 1-52 = 1-43 6 Nov. 2 5' + 107 1 1 079 4-1-27 = 1-60 1702 9 261 4- 8-7 12 - '39 - ''57 =- 0-72 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. M eau Latitude, of Days. Equation. of Group. Central Meridian. Longi- tude. Mean o( - Latitude. Days Equation. 1885. o 1886. Q O 1705 June 19 263 15-0 " 1869 Apr. 20 202 + 4-3 12 4 i -050; -27/7 = 4- 0-30 6 21 241 + 10-5 13 o'42a: i'53y = + 0-80 1872 25 139 - ''4 13 4- 0-97 -26 = 0-12 1710 27 162 - '3 - 4 ... 4 26 118 -18-3 14 + 1-03 -32 0-20 i 28 144 16-0 10 0*26 -50 = 0-96 6 May 3 32 - 6-5 13 4- 0-8 1 -35 = 0-28 4 July 5 56 10-8 13 : ~75 - - ?6 = 4- 1-94 8 Apr 30 69 '- 11-5 8 + 0-03 -14 =4-0-10 5 5 53 - 18-9 ii 0-94 -12 0^63 1880 May 8 331 4- 8-6 12 4- 0-8 1 -4.4 = 0-12 6 ' 354 - 15-1 12 0-82 '38 = 0-26 4 27 74 10-6 13 4- 0-24 -57 - 0-16 8 '4 292 - 8-5 12 - I'Os - -27 = 4- 1-83 6 30 35 - 5'9 8 4- i'ij + 0-21 = 0-53 1720 18 247 + 9'i 13 -I'll - I-I3 =+ 072 1891 June 6 303 - H7 10 - 0-56 1-45 = 0-40 2 20 215 - 6-2 12 - 0^0 - I- 3I =- 2'33 6 ,, 22 98 - 15-0 ii 0-23 -45 =4- 0-58 4 2 213 -. 13-2 8 o'6i - 0-99 = 4 o'io 7 2 3 74 1 1-7 12 o'i8 -fjo = 4- 0-47 8 23 175 - 11-4 13 - !-> 1-13 = + 1-38 1901 July 3 302 - '5-3 13 64 -43 0'22 1732 2 9 99 - 12-6 1 1 - '23 - 0-95 -=- 1-03 3 >. 4 289 20 o 1 I O'6o -29 = 0-95 3 Aug. 2 49 -zi'5 12 - -25 -0-97 =-0-30 6 21 73 - 9 '4 12 I'io '22 = 0-48 7 1 298 I I'2 12 -50 0-58 = -t- 0-28 8 26 357 - 3'' I I - i'o> - 'o6 =+ 0-47 8 II 288 - II'4 13 -46 0-66 = o'j8 1910 3 301 - '3'3 12 1-27 'oo = 4- 0-13 1742 14 2 5 2 + 127 12 - -48 - 071 = 4- 0-43 2 3' 300 + 16-8 ii 1-27 0-78 = + 0-23 5 '5 228 + 6-6 I I '35 '7 = 0-12 3 Aug. 6 215 - 5'3 ii - 1-45 - 0-44 =- 0-30 8 20 '73 - I3-9 12 - '52 O'50 = O'22 5 ,6 79 - 9'3 10 1-26 0-81 =4-0-93 1754 28 57 10' I 12 '60 O'24 = 4" O'2O 1920 Sept. 4 189 4- 12-4 12 1-68 + o'o6 = 0-98 6 3' '8 - 4-8 I I -56 4" O'I2 = O'2O 3 '5 44 4- 12-8 '3 - 1-55 4- 0-14 = - 0-24 7 Sept. 3 341 + 10-5 13 56 0-16 = + 0-38 6 16 35 - 5' 8 - 1-13 + 0-33 =4- 1-47 9 7 293 - 12-4 12 -60 o'l i + 0-65 1930 Oct. 5 '47 - '5'5 1 1 -1-31 4- 0-74 = 0-22 1763 H 203 -13-6 12 '60 -f- o - i 5 = 4- o'So 1941 Dec. 15 290 4- 18-5 1 1 + 0-33 4- '45 = + 1-07 7 27 28 - 2-6 '3 "44 + 0-57 = + 0-14 3 ,, 28 126 - 1 1 -6 8 0-08 4-1-07 =4- 1-70 8 27 23 + 7'5 '3 -48 4- 0-44 = 0-44 4 28 1 1 1 - 8-3 12 4- 0-66 4-1-49 = 0-23 1770 3 345 4- I2 - O 1 1 - -39 +0-52 = 4-0-42 3 Oct. 6 261 - 16-8 12 -39 + 078 = 0-04 1887. o o o 4 6 265 I '2 9 0-79 + i'5 = 4- 0-86 1946 Jan. 3 38 -,6-5 I 2 + o'55 + W = - '35 5 ii 20 1 ~ I3-9 10 - -43 + 0-26 = + 1-40 9 30 43 - 3'4 12 4-1-24 + -05 = + 0-48 9 23 43 + 7'2 12 - -31 + -04 =+075 1958 Feb. 24 7' + II'2 12 + 1-63 4- o'i i = + 1-13 1783 26 4 - 3'9 13 -08 + -20 =+0-38 1970 Apr. 2 2 45 + '3-1 10 4-0-77 - -27 =+073 4 27 356 - I5-4 1 1 0-87 4- -17 = 040 3 May 8 191 4- 12-7 '3 4- 0-67 -44 = -f 0-06 6 3i 304 - 9-2 1 1 i -02 4- -05 = 4- 1-08 8 16 80 - 9' 2 8 o'oi -18 = o-io 8 Nov. 3 261 - '5'i 13 0-83 + -29 = 0-38 1987 June 1 1 95 - 8-5 i 13 - '43 - '5 =- i'5 2 '793 16 9 4- I3-9 12 -072 4- -48 =4-0-45 1990 24 292 - 57 8 4- 0-26 '05 = 4- 0-40 5 '9 54 + H- 8 12 - 0-52 + -52 =4- i -02 i July 2 179 - 11-6 12 o'86 -40 = + 0-40 7 22 6 - 3'6 8 074 +0-91 =+0-13 2 8 97 - 7'3 13 -074 - -39 -0-12 1806 Dec. 1 6 53 + 15-2 12 +0-08 + -59 = 4- o'8o 4 12 54 + 7'3 12 0-90 -36 = 4- 0-47 1813 26 288 + 17-1 12 +0-53 + -54 =-0-63 7 Au 8- 4 1 06 - 107 9 0-93 0-96 = 040 5 29 246 - 16-4 8 0-15 + -15 = + 0-07 8 5 98 - 7'5 1 1 - -13 -0-92 =-0-45 9 29 244 4- 7'2 9 + 0-58 + 1-25 = + O'lO 9 5 89 - 4'9 II -27 0-82 = 0-03 2001 18 276 - 9-8 9 -12 0-82 = 4- o"6o 1886. o o 2 ,, 19 262 4- 9-8 10 -07 ' i -02 = 0-80 1820 Jan. 6 141 + 9-3 8 + o'oiz 4- 1-14^ =- 0-47 8 Sept. 1 8 233 4- 4'9 10 -40 4- 0-55 = 4- 0-17 i 8 105 - 13-9 H 4 0-99 4-i'37 = 4- ' 66 2012 Oct. 22 136 - 0-4 10 "ii + ' Io =~ '7 6 '4 33 - 37 10 + 0-53 + 1-44 =- 0-47 4 2 5 108 - 2-5 10 -06 4- '08 = 0-70 8 14 2 9 IO'I 10 + 1-45 4- 0-42 = o-oo 7 Nov. 1 1 237 - 8-0 12 0-94 4- '3 1 = 4- o 18 9 18 335 + 9'2 IO 4- 0-85 + 1-31 =- 0-53 9 ,, 17 162 - I7-9 10 0-95 + ''9 = 0-06 i833 Feb. 4 1 08 - >4'9 13 4- '47 4- 0-59 = - 0-34 202 1 Dec. 9 224 - 7-6 13 0-09 + -56 =4- 0-34 5 10 35 - 9'5 13 4- -43 4- 0-62 = 0-24 4 >. 20 81 - 8-0 13 + 0-30 4- -55 = + o-66 1844 Mar. i 140 - 9'4 8 4- -16 4-0-30 =4-0-27 7 6 83 - 17-2 12 4- -65 4- o'O2 = + 0-12 8 6 78 - 5'8 8 4- 0-93 + 0-67 = 4- 0-30 1888. O O o 1851 9 4i - 27 12 4- '64 4- o-oi = 0-43 2026 Jan. 5 228 - 8-0 1 1 + 0-58^ + I-33// =+ 1-12 2 9 36 - 87 13 + '5 8 -0-03 =+0-54 9 l6 85 - 87 12 4-079 4-1-41 =4-0-60 3 10 23 - 5'i 3 ,+ '57 0-07 = o-oS 2035 Feb. 24 297 - 47 12 + i-59 +0-44 + 0-43 6 24 200 + 5-4 13 4- -51 -0-45 =-0-30 7 Mar. 1 4 40 + 2-6 12 4-1-62 0-29 = 0-78 9 29 136 - ''3 13 + '44 ' 6 7 = + 0-24 2052 May 17 274 - 7'8 13 4- 0-60 1-46 0-58 1860 30 116 - i6'8 1 1 4- -28 0-84 = 4- 0-50 3 June 12 302 - 4-6 8 0*46 i 'i 5 = + 0-07 i Apr. 4 56 - irS 12 -J- -48 0-64 = 4- 0-07 2066 Sept. 3 277 - 6-1 '3 1-57 0-08 =4- 1-38 3 5 38 - 11-3 8 + 1-13 - o-i i = o oo 2070 12 164 - 14-9 ii i -49 0-06 = + 0-28 4 . 6 27 - 5'4 13 4- 1-38 0-81 = + 0-58 i Z 4 3 - 47 9 IMI 4- 0-76 = 1-14 *- * FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. Y .w 17 . ' THE PACIFIC TABLE VI. continued. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1888. o 1891. o o 2074 Nov. io 96 4- IO'2 1 1 0-442; 4- i"39*/ = 4- Q'93 "54 July 1 1 219 + 20-4 ... 5 16 16 - 4' 12 - 0-56 4 1-54 =+ 1-53 5 '4 1 80 + '57 13 0-982; i"$oy = 4- 0-48 6 Dec. 2 163 - 11-8 I I 4 0-06 + 1-53 =4- 2-18 6 '4 '73 4- 24-8 I I 1-09 i'o6 = 0-63 8 16 346 6-4 8 4 0-87 + 0-85 = - 0-37 8 18 130 4- 20-0 13 1-12 1-12 = + 0-68 9 '9 H3 4- 21-3 '3 1-06 i-i2 = 4- 1-34 1889. o O O 2265 24 45 4- 16-3 . . . 2082 Feb. 26 I 12 - 7' 2 9 4- 1-312; 4 o-29!/ = 4- 0-40 2271 Aug. 3 275 - 1 8-4 9 1-34 0-08 =4- 1-27 3 Mar. io 3'7 - 7'4 1 1 4- 1-54 0-07 = + i-68 2 7 223 + 1 8-2 8 0-52 i-oi = 0-37 6 Apr. 7 3'5 + 5'3 ii + '-31 - 0-58 =- 0-33 5 9 191 - 17-9 '3 1-35 0-79 = 0-58 2090 June 22 3' - 5'5 '3 0-62 1-48 = 0-74 7 io 182 '3 1-40 0-67 = 0-62 2 July 1 8 36 - 7'9 13 0-91 1-26 =4 1-44 8 n I0 '77 + 24-3 '3 1-33 0-79 = 0-62 7 Aug. 5 161 - 20-7 10 -49 0-36 - 0-83 2289 ii 2 8 307 + 157 9 i -08 073 = 0-80 8 n 80 - 7'2 9 -39 0-06 = 1-17 2293 Sept. 3 221 4-21-8 '3 1-55 4-0-21 = 0-92 9 '4 37 - 8-1 12 -48 0-66 = 0-15 4 6 '77 + 25-5 '3 1-58 4 0*13 = 0-06 2100 Sept. I 1 60 - 194 12 - '57 -0-13 =4-0-67 5 5 I 99 10 - i '44 4- 0-48 = 4 0-03 3 2 9 '53 20 9 I I - '4' +0'47 = -'35 7 9 148 + 28-6 H 1-65 0-06 = o-io 21 IO Dec. 25 IOO -26-5 '3 + 0-38 4 149 =4- 0-18 8 9 '47 + 12-7 12 1-64 0-09 = 1-25 9 16 5 2 4- H' 6 '3 1-55 + 0*19 = + 0-18 1890. o o 2301 H 73 4- 23-3 21 I I Jan. 2 344 9'3 12 + 0-512; 4- i- 55 // =+ 074 2 20 6 - 23-2 10 1-37 4- 0-64 = 4- o 33 7 Mar. 9 190 4- 32-9 I I -t- 1-42 + 0-02 = 0-75 6 3 227 4 23-2 ... 2126 May 22 294 + 20-8 2310 Oct. 4 '74 - 254 13 1-42 + 0-64 = o'88 2132 July 1 1 4 - 2 3'9 8 4- 0-15 1-06 = 0-60 i 4 171 4-267 '3 - 1-43 + 0-56 =- 0-54 3 9 23 2I'l 8 0-98 0-69 - o'io 3 6 144 + '9'4 12 1-40 + o'8i = 0-27 5 28 129 - 6-4 1 1 - 0-82 - I-2I = - 1-05 5 8 126 - 14-9 12 - 1-46 4- 0-73 = 0-28 6 Aug. 3 4- i 8-0 10 - o'88 1-25 = + I'oo 8 13 54 + H' 2 '3 1-35 + 0-83 = 0-74 2141 j 3 4 1 4- 21-1 '3 -;S - 0-19 =4- 0-32 2325 )* * 334 4- 16-4 IO 0-82 4- 1-33 = + 2-83 2 Sept. 3 6 - '9'3 9 -12 + 0-62 = 4- 0-27 8 2 8 218 + 1 8-0 12 1-20 4- 1-09 = 0-27 5 260 + 2 4'5 9 - -27 - 0-17 =- 1-47 9 27 228 + 25-9 8 0-89 +0-71 = 0-47 2151 ,. 2 8 37 + 22-2 8 -io + 0-36 = + 0-06 Nov. 4 123 4- 22-8 .. 6 Oct. 26 28 - 23-3 '4 -13 4- ri8 =4- 0-36 9 6 1 06 + 18-9 9 0-61 4-1-23 = 4- 0-13 8 Nov. 1 3 148 - 24-7 8 0-96 4- 0-62 = + 0-36 2341 9 60 4- 1 0-4 10 0-93 + 1-29 = + 0-50 9 28 312 + 19-9 '3 - 0-13 4- 1-56 = 0-02 5 *) / 316 4- 18-1 10 0-96 + -io =4- 1-30 2162 Dec. 1 5 87 - 27-5 8 4- 0-62 + i'oo = - 0-50 8 19 285 19-0 8 0-03 4- -14 = 0-30 9 21 261 - '9'3 '3 -0-49 + '5' =+2-54 1891. O o j 235 24 229 + i9'3 12 0-44 4- -60 =4- 1-96 2169 Jan. 2 1 310 26-9 '4 4- 1-23.1- 4- n6y = + 1-82 2 2' 265 in 8 4- 0-45 + ''6 -- 1-17 2175 30 196 + '7'9 .2360 Dec. 8 34 - 17-8 8 4-0-34 4- '12 -0-43 9 Feb. 1 2 35 + '57 8 4 '2i - 0-18 = 4- 0-70 4 18 268 - '9'9 '3 40-31 4- -55 =-0-14 2183 21 277 + '9'z 10 4- -52 4 0-25 = 1-84 5 ! ,,. '7 284 - 19-1 1 1 + 0-70 4- '3 = '4 2 6 ,, 26 209 + 2 4'4 1 1 + "3 +0-34 =4-0-83 9 24 195 4- 28-6 1 1 4 0-63 + -35 = 1-40 2190 Mar. i o 39 + I5-9 9 4 '3' +0-32 =4-0-14 2370 27 '53 -24-8 8 0-20 4- ' Iz = 0-93 3 '9 285 4 19-6 13 + '53 '36 = 4- 0-66 5 Apr. 4 74 4- 19-6 '3 + '35 -75 =-0-08 1892. o O 2204 )) / 136 -19-8 12 4- -03 1-26 =40-17 2376 Jan. 4 39 + 2I-I 13 4 0-642; 4- '39y = + '8 22IO May 1 1 3H 4 22-4 9 + 0-92 0-96 = 4 o--6 2380 3 42I-9 9 4-0-51 4- -24 = 0-20 I '0 3'5 - 2 4 7 '3 4-0-75 -41 = i -80 3 ., 5 2 9 + 22'8 10 + o'53 + '33 =- 2-57 6 '8 218 + '6-3 1 1 + 0-63 - -32 - 0-45 4 6 23 - 16-4 '3 + 0-93 4- '24 = 0-72 7 18 209 20-7 12 -i- 0-74 - -41 = 0-07 2 39 .. '3 275 - 25'5 10 4- 0-58 4- -33 =4- 1-23 9 22 | I 59 4- 16-2 12 + 0-21 - -63 =4- 0-28 5 19 209 - I 8'2 1 1 4-0-83 + -26 =-0-73 2220 24 136 - 194 12 + 0-47 - -56 = 4- 0-70 7 20 189 - "'3 '3 4- 1-06 + -20 = 0-08 I 2 5 > 2 S 4- 2O-2 1 I 4- 0-55 - -46 = + 0-23 9 2J 184 4- 28-0 i3 + i'2o 4- -02 =4- 0-46 4 30 55 - 16-8 12 40-34 - -59 =+073 2400 21 181 * >3'9 i3 4- ri6 + "io - 006 2231 June 7 310 + 23-0 II 4 0-24 -52 = o-io 5 23 149 4- 1 8-6 12 + 1-23 + -03 = + 0-25 5 '5 200 4- 26-1 8 1) 84 - '5'3 13 4-1-20 4- -oi = 4- 1-24 6 18 1 68 4 14-2 I I -0-46 - -40 =4-0-53 2412 Feb. 3 4 19-8 9 4 0-92 + -07 =+ 1-17 7 20 139 + 18-2 '3 -0-47 - -51 =4-0-36 6 5 338 + 22- 7 ii 4-1-22 4- 079 = + i -i 2 2242 26 62 (- 14*2 12 -0-50 - -55 =-0-35 7 6 326 - 2I- 9 8 4-0-72 40-91 = 0-13 3 26 54 + I5'4 9 - 0-08 - -34 = 0-04 2421 ; 12 256 -28-3 12 + 1-48 + 0-63 =4- o'38 4 j .. 2 7 43 4- i '6-1 '3 - 0-56 - -47 =4 no 5 . '3 239 - i9'5 10 4- 1-52 0*09 = 4- i'oo 7 28 35 20-9 10 0-83 -25 =+ o-io 7 '7 183 + 9'5 IO 4-1-50 4- 0-29 = 4- 0-60 2251 July 4 31 + 28-0 ... 8 '8 173 + H'2 I I 4-1-47 4- 0-37 =- ri5 2 7 277 + '9'o 12 - 0-78 - 1-44 = - 0-35 9 '9 158 4- 16-1 '3 4- i'53 + '3 6 - o'H POSITION OP SUN'S Axis. 18 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. 1892. o o 1892. C o 2431 Feb. 20 145 + 19-4 12 + -59 +0-17 = + 0-55 262'! Aug. 1 1 15 + 25-0 8 -182: 4- o-i5?/ = 0-37 4 2 5 77 + 25-1 10 + '25 + 0-79 = o-io 2 16 314 -t- io-o 13 - -52 -0-47 =+0-38 2440 Mar. i o 250 28-4 H + -66 0-28 = + 0-50 3 17 303 - 7-0 12 -50 0-58 = 0-50 7 18 144 + 24-0 9 + 0-99 0-75 *+ i -80 6 18 282 : 18-3 12 -56 '39 = + '63 8 21 1 06 + 9'5 12 4- -49 0-58 = 0-28 7 20 26l 4- 22'2 12 - -53 - 0-61 --0-55 2451 23 85 - 15-9 13 4- -46 o'57 = o'O2 8 19 269 - 24'9 9 -27 0-46 = 4- 0-40 4 27 32 + 277 13 + -39 0-60 = - 1-14 2636 26 1/4 4- 12-8 13 -50 0-43 = + 0-96 9 3 354 - 25-4 8 4- 'iz +0-10 = 0-16 8 24 21 I 4-21-8 9 - - 39 + 'i5 =+ i'47 2466 Apr. 6 264 I2'2 12 4- -38 0-87 =4- 1-20 9 28 146 + 9'o IO - '53 + 0-13 =+ 1-30 H77 1 198 + 12-9 9 4- -29 0-36 = 1-50 2643 iSept. i 93 4- 10-4 14 -67 0-15 = + 1-44 8 12 178 + I7-I 9 + -22 0-55 = 0-03 4 2 82 - 22-8 13 -51 0-25 = 4- I'I2 9 13 164 2O'3 9 + 0-81 1-07 = + 0-27 8 6 40 19-6 II -45 + 0-13 = 0-68 2481 i? 107 4- n'4 13 + 1-23 - 0-99 = 4 0-14 2653 12 308 4 H'9 12 -68 + 0-17 = 4- 0-83 4 18 9i - 28-4 2661 15 2/0 - 25-3 ... 5 '9 81 - 13-8 9 + 0-47 - -32 - 1-40 2 17 247 2I-I 10 - '45 - '3i = + 0-13 6 23 28 + 10-5 12 + 1-02 - -33 = 4 0-57 2671 22 177 + 5'6 8 - -i i 0-23 = 4- 0-37 2490 24 H - 22-5 9 4-0-40 - -27 = 0-13 2 23 ,6 7 - H'9 13 - '53 + 0-38 =4- 1-42 i 25 10 + 167 8 4- 0-25 -15 = o - i6 3 24 154 + 13-1 12 -66 4- 0-24 = + 1-53 2 29 3H - 18-1 '3 + 0-87 -28 = 0-32 5 2 9 9 2 + 10-6 13 -45 4- o'6o = + 0-50 4 26 352 + 16-5 9 4- 0-56 -29 = 4- 1-20 9 3 7 6 - 234 I I -19 + 0-86 = 4- 0-62 6 May 4 253 - 24-5 H 4- 0-85 -41 = 4 0-40 2680 Oct. 2 46 - 21-4 12 - '55 -r '37 =-+i'43 7 4 249 + 207 10 + o'54 - '37 = + 0-50 i 3 4 1 + iz'4 13 - -37 4- 076 =+ 1-14 8 6 215 - I2'5 12 + 077 - '46 = - 0-38 5 6 5 + i4'9 10 -13 4- i -06 =4- 0-90 2507 1 167 + 18-9 12 + 0-50 -52 =4-0-07 2694 H 255 - 12-3 12 -46 4- 0-49 = 4- 0-24 2515 16 84 14*0 13 + 0-60 -45 = 4- o - 2O 2703 21 167 + 8-1 13 -23 4- 0-97 = 0-22 9 '9 49 + lO'O 12 4.0-24 ~ -60 = + o-i6 5 20 174 - 21-9 10 - -oi + 1-17 = + 0-93 2524 24 342 + 15-6 13 40-31 -55 = i-io 6 22 152 - 22-9 9 - i i 4- 0-79 = no 8 26 313 - i7'i 9 + 0-85 -oi = + 0-23 7 22 142 - 26-6 9 -17 + 0-56 = 0-24 2530 23 2 + 10-5 8 0-30 -io =4-0-47 2715 Nov. i '4 + i4' 6 9 -23 4- 0-58 = 4 0-40 4 3 267 - 19-2 12 4- 0'22 "60 = 0-15 6 I 19 - 27-7 1 1 - 0-81 4- 1-29 = o'2o 9 29 275 + I3' 2 9 -0-17 - -37 =-0-40 7 Oct. 3 1 29 21-0 10 - 0-39 + 1-47 = 4 0-27 2541 30 26 4 + 5"i 9 -' 2 3 - '34 =+0-43 2725 Nov. 4 335 - 8-6 2 June 2 218 -187 9 4- 0-78 -06 = + 2-03 6 8 288 4- 8-2 12 0-84 + 1-44 = + 0-72 3 4 200 + 97 13 0-07 - 6o = 4- 0-64 2730 7 295 4- 20-0 8 + o-io 4- 1-19 . 4- 0-47 5 7 I6 3 + 18-4 8 4- 0-50 -oo = o - 6o 6 .6 174 4- 8-6 10 - 0-42 4 1-51 = 4- 0-84 8 ii I0 3 + 21-4 10 + 0-40 -42 = 1-44 7 19 142 - 24-4 1 1 0-65 + 1-29 = + 1-43 2550 12 86 + 8-7 12 - 0-26 -63 =4- i -oo 2745 27 33 2O'6 1 1 - 0-27 + 1-49 = + 1-70 4 15 56 + 10-5 9 + 0-33 -28 =o-66 7 28 21 - i3'i 1 1 0-19 +1-51 = 0-50 9 16 35 + 25-1 12 -0-76 - -39 =-0-53 9 29 7 -15-6 12 o'oo 4- 1-64 = 4- 0-30 2560 '5 47 - 31-0 9 - 075 - rii = 4- 1-37 2752 30 352 - 6-9 8 0-58 + i'8 = 4 0-44 i 18 5 - 22-5 ii 0-13 1-42 =4- 1-05 5 Dec. i 344 - 8-6 2 19 355 4- n-i 13 - 0-27 - -55 =+ 1-86 7 3 309 + I7-5 1 1 O'22 4- 1-46 = 0-15 4 21 337 + 207 1 1 0-50 -38 = 0-52 9 5 293 + 19-6 10 - 0-43 4- i '43 - '3 5 3 298 + H-8 12 0-46 -59 = 0-25 2760 5 291 + 6-6 12 0-09 +1-62 =4 no 7 25 285 + ii-S II -0-27 - -44 =-0-43 2 6 278 + 147 I I - 0-27 4- 1-51 - 4- 1-48 2578 July 5 149 + H'4 II c-8i -32 = 0-52 8 7 266 + 12-8 10 o r o2 4- i'5 2 = + 0-43 2580 9 98 - 22-9 12 -0-79 - -38 =-0-97 2770 8 253 - 22-2 I I - 0-17 + 1-45 =4- 0-65 i 1 83 + i ro 13 -0-93 - -28 =4-0-14 3 H 7 260 | ii'5 10 + 0-21 4 1-56 = + 0-40 3 H 33 - 31-3 13 - 73 - '3 Z = - 0-64 7 9 229 - 15-4 12 4- 0-14 4 1-63 = 0-40 4 H 26 + 28-0 13 0-91 -24 = 2-16 8 11 207 + I9'3 I I + o'i2 4 1-46 =4-0-95 6 20 302 - 9 '4 12 - -10 -19 = 0-23 2782 15 152 + 13> 10 0-43 4- i -44 = 0-40 2598 30 175 + I3-3 12 -40 0-85 = 4- 1-07 5 23 58 + 9'9 8 4 0-87 4- 0-85 = 4 i-oo 7 3' 172 -23-8 8 - -16 - 0-14 =+ 1-37 7 26 6 ~ I7-4 12 4- o'6o + 1-48 = 4 1-55 9 3i 161 + 15-2 13 -25 0-97 = 0-92 2792 30 320 -23-6 13 4 0-69 + 1-43 = 4- 1-26 2600 Aug. i 158 - i5'9 12 - -35 -0-89 =4-0-70 i i 153 4- iro I I '04 1-04 = 0-25 2 l, 2 H3 + 11-3 13 -2i 1-04 = 4- 0-26 1893- O o o 8 July 31 1 60 + 24-0 8 0-99 0-60 = 4- 0-97 2794 Jan. 3 272 - 127 8 0-062 + I'idy = + 0-46 261 1 Aug. 5 94 + 9'8 13 -31 0-89 = i'68 5 ,, 3 271 - 26-1 2 5 9 1 22"0 12 -39 0-80 = 4- 0-04 6 4 254 - 30-9 8 o'ii 4- i -08 =+0-90 s ii i7 - 30-4 12 -30 0-85 =4-0-15 9 ,, 2 280 + 10-6 7 12 12 - 8'5 I I - -27 - 0-76 = - 0-45 2806 7 210 4- 22-3 8 4- 0-14 +1-14 = o-io 2620 ,, 12 I I + 13-8 10 -46 0-28 = 1-36 8 : 9 194 + 187 9 0-03 + 1-32 = + 0-06 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 19 TABLE VI. continued. No. of Group. Date on Central Meridian. Mean ,, T . Mean L-f Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1893. 1893. o o 2813 Jan. 1 6 99 - 8-5 9 + 0-392; 4- I-25?/ = 4- 0-27 2992 June 2 91 20-8 H + o-iiz i'6jy = 4- i -20 5 '6 92 + 9'i 13 4- 0-99 + 1-23 = 4- 0-56 3 3 77 21'0 13 0-09 1-58 = 0-38 9 22 i5 - i3'i 12 4-1-05 4- 1-26 = 0-02 4 3 77 + I0'5 IO 4- 0-48 - 1-44 = 0-63 2822 2 3 357 - 9' 2 IO 4- 0-87 4- 1-24 = 4- o-io 5 3 69 18-0 10 - 0-39 - 1-44 = 4- 070 3 25 34 2 + H'4 i 9 4- -19 4- 077 =4- 1-57 6 5 42 + 177 12 0-09 i '62 = 4- 0-43 5 2 7 316 - 17-3 9 -h -31 4- 0-39 =4-0-20 9 ., 4 56 + in 8 0-62 0-97 = + o-io 6 3 270 21-8 13 4- -31 4-0-89 =4-0-54 3002 8 9 - I5-9 IO - 0-38 - 1-51 =+ 1-33 9 2 9 282 4- i7'2 10 4- '45 4- 0-40 = 4- 0-63 4 ii 326 + 13-2 13 - 0-14 - 1-55 =+ 0-14 2830 Feb. i 250 4-13-9 12 4- -38 4-0-89 =4-078 5 ii 322 - I2'5 13 0-04 1-58 = + 0-36 i i 245 + 24-9 II 4- -26 4-0-73 =4-0-23 7 12 3" - '3'3 10 + 0-05 i -5 1 = 4- 0-64 5 3 212 - 23-0 | 9 4- -27 4-0-18 =4- 173 3010 13 306 - 177 8 0-43 ro8 = + 0-87 8 ii 108 II'O 13 4- -42 + 070 =+ i 64 i 13 298 + H7 9 0-76 i -07 = 0-06 2842 13 9' io- 1 10 4- -54 4- 0-24 = 4- 0-87 5 H 287 19-6 8 079 o - 8i =4-0-67 3 H 7 2 - 17-9 12 + '59 +0-36 =4-0-85 8 16 262 + 13-6 8 0-80 075 = 0-54 6 17 28 - H'5 12 4- - 6i 4- 0-40 = 0-93 3020 '9 224 + 17' 9 0-91 0-92 = 0-97 7 18 2 5 - 10-4 12 + -62 4- 0-46 = 0-54 3031 2 5 140 - 30-5 9 0-94 0-91 = 0^64 2851 2 3 3 2 3 - 1 6-8 ... 2 26 34 10-8 9 0-85 roi =4- 0-80 3 2 4 300 + I5-3 II 4- '53 + 0-22 - 1-52 5 July i 64 -23-6 6 25 290 4-9-4 'i 4- -50 0-22 = o - 8o 6 3 40 + 18-9 9 0-40 i '27 = 0-37 7 2 7 266 - 17-2 13 4- -59 4- o - o2 =4- i -06 3042 5 7 - 18-1 13 0-70 - 1-39 = 4- 0-28 2861 Mar. 2 217 20-7 12 4- '62 0-03 = 4- 0-44 6 9 321 - 1 6-2 12 0-79 1-38 = 0-58 7 5 188 + .2-4 II 4- i '54 0-20 = 1-27 7 8 322 I2'O 12 - 0-83 - 1-37 =- 0-43 9 5 178 4- 6-6 ... 8 9 320 - 6-5 IO 0-40 i '49 = 0-84 2872 7 164 - 7'i ... 3050 io 308 9-2 8 0-06 1-13 =4- 0-23 3 9 127 - J9'3 8 4- no 4- 0-37 = 0-13 4 ii 284 20'0 : 12 0-92 1-29 = O'I2 9 i5 49 - H'3 ii 4- i - 45 4- o-i i = 0-02 9 9 316 4- ii -6 9 1-15 0-65 = 1-67 2880 16 4i - 13-1 . .. 3065 H 2 57 - 22 '5 8 0-15 1-05 =0-70 i , 16 4 2 - 8-2 12 4- i '62 0-29 = 4- 0-25 6 H 250 1 8-0 ii -0-59 - i'33 =-0-15 9 23 34 4- 13-8 II 4- i '45 o-u = 4- 0-30 7 H 251 + 1 6-0 12 1-14 1*13 = 0-80 2892 2 4 292 + 97 13 4- i '47 0-56 = 0-24 8 i5 234 + 4'5 13 0-93 1-30 = 4- 0*96 3 2 5 2 75 + 237 13 4- 1*50 0-48 = 0-38 3070 H 245 -15-8 9 0-75 1-19 = 0-20 9 3 214 2O'O 12 4- 1-34 0-92 = 0-15 i i7 216 4- 17-2 12 1-03 1-25 = 0-05 2900 3i 196 4- 17-1 8 4- IMI 4- 0-23 = 0-66 8 2 5 109 - 21-5 13 i'22 0-97 =4- 0-06 i 2 9 228 4- 25-1 8 4 0-98 0-67 = 0-37 3083 2 6 87 1 1-4 9 - 0-38 - 1-25 =4- 0-37 6 Apr. i 182 - 14-4 12 4- 1*40 o - 86 =0-54 4 27 74 + 2 3'8 8 0'20 IM5 = 4- 0-50 8 5 131 + 9'9 8 4- 1-17 4- o-io = - 0-33 3097 Aug. 5 322 - I7-9 12 -30 0-94 = 0-07 2913 9 82 20-6 IO 4- i'43 0-42 = 4- 0-27 8 5 322 + 10-3 13 -40 0-75 = 4- 0-02 4 i 2 45 - 8-5 14 4- i "36 0-99 = 0-44 3103 5 3'3 - I5-3 12 -39 0-81 = 0-15 9 ii 56 - 28-1 9 4- o'8o -ii = 0-06 5 6 37 -.3-6 9 -16 0-65 = 4- 070 2923 i7 33 2 - H7 12 4- i'o8 -2i = 1-37 6 7 2 93 -17-6 12 -49 0-58 =4- no 5 18 3H + I4-9 12 4- 1-17 - -13 =- 7o 7 7 295 + i5' 6 I I -36 0-67 = 4- '4 2930 22 269 4- 24-9 9 6 301 - 4' 2 10 - -50 -0-35 =4-0-17 i 2 3 259 4-21-0 I I 4- 0-87 - -18 = - 0-58 3112 ,, ii 246 + 16-9 12 -22 I-04 =4- 0-17 8 2 7 205 4- 8-6 II 4-0-89 - -25 =4-0-35 3 ii 2 4i - 9-6 12 -40 0-82 = 0-36 9 28 190 - H'4 12 4- i'o8 -14 =4- 0-15 6 12 228 + 16-8 II - -41 -0-59 =-073 2940 27 199 4- 16-8 9 4-0-58 - -15 =4-0-70 8 13 212 16-4 13 -42 0-65 = o-oo i 30 159 + 227 3130 17 168 + 9'9 9 -37 4- 0-04 = 0-64 6 May i 151 + 3'4 8 4- 0-73 0-92 = 4- 0-07 i 20 121 I2'I 12 -50 0-65 =4-2-08 7 2 '37 18-9 IO 4- 0-91 -19 = 0-13 3 21 I0 5 10-9 13 - '49 -0-51=4- 0-36 8 2 137 - 12-3 12 4- 0-69 -50 =4- 0-48 5 21 102 18-9 I I - -40 -0-55 =-0-25 2951 5 94 - 19-4 !3 4- 0-86 -34 = 0-56 7 22 9 - 9-8 12 - -57 -0-36 =- 178 3 6 77 21-7 10 4- 0-99 'io =4-1-03 9 2 I 109 - 28-1 9 '30 0'O2 =4-O-I4 6 8 52 - 27-1 12 4- 0-67 - -49 = - 0-33 3Ho 2 4 67 + 10-4 9 0-98 0-92 =4-1-30 8 8 51 14-6 I I -i- 079 - -25 = - 0-47 2 ,, 22 88 19-6 8 -12 0-29 = 4- 073 ,9 9 46 - 7'5 8 4- i'oo o'6i = 0-17 3 2 S 5 2 + 9'5 13 -54 0-39 = 0-62 2962 12 357 - '3'3 12 4- 0-61 -51 = 0-62 7 2 6 40 + 17-1 9 -18 0-61 = 4- 0-93 4 H 33i - 12-9 IO 4- 0-83 -24 = 0-50 9 28 15 + 26-4 12 '60 O-OJ =4-O-I5 7 16 311 - 12-9 I I 4- o'io -50 =4- 0-57 3i54 Sept. 3 302 10-4 12 ! '63 o'li = 4-0-18 9 "9 269 -)- 21-2 9 4- 0-92 0-89 = 4- 0-20 5 3 302 + H' 2 13 -56 4- 0-08 = 0-36 2977 25 187 4- 12-5 12 4- 0-24 -63 =4- o-io 6 3 292 - i9'5 13 -54 0-19 =4-0-26 2980 24 209 + '47 9 - 0-46 -27 = 0-87 3162 6 268 - 13-5 9 -19 0-61 = 0-83 i 27 1 66 - i3'5 8 4- 0-55 -oi = 0-30 8 9 221 - 7'7 ii - '53 4-0-19 =-0-58 2 28 156 4- 237 1 1 4-0-45 - -38 =4-0-07 3173 13 169 - 8-7 13 - -54 +0-32 =- 1-04 20 POSITION OF THE SUN'S Axis, TABLE VI. continued. ,No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1893. o 1894. o o o 3'77 Sept. 17 I 12 22'2 1 1 1-413: - 07// = 0-60 3363 Jan. 20 260 5-9 12 4- i '222: 4- i'9y = + i'3 3186 21 61 + 8-4 12 i'6i 4- 0-27 = 0-23 4 21 255 4- 1-6 12 + i-i i 4-1-20 =4-0-83 7 22 49 - 8-1 I I 1-42 + 0-51 = 0-30 7 22 234 : - 3'i 12 4-1-29 4-1-03 =4- 0-22 3191 22 5 + 12-4 9 0-89 4- i -00 = + 0-50 3372 27 173 - 6-9 13 4- 1-29 4- 0-95 = 4- 0-96 3202 2 9 306' - ii'3 12 1-48 4- 0-62 = 4- 0-43 7 28 1 52 4- 16-0 3 3 301 + I2'8 13 1-43 4-0-66 =4-0-92 3380 28 159 - 8-4 io + 1-47 4- 0-38 = 4- 0-27 6 28 322 + 7'6 8 0-69 + '9 2 = 0-03 5 Feb. 3 74 - 18-3 12 4-1-59 4- 0-44 = - 077 7 Oct. 5 233 + 3' 12 1-53 +0-56 = + 0-90 9 7 2 I + 15-3 9 4- 0-91 4- 0-96 = 0-26 32'3 6 223 - 21-4 8 0-82 + 0-65 = 4- 073 339' 8 8 + H' 2 9 4- 1-33 + Q'4 1 =+ '33 6 9 176 - 8-1 12 1-33 +0-91 =4-0-42 2 ii 333 - 10-3 12 4- 1-41 4- 0-84 = 0-04 3220 ii i55 - 12-9 8 ri2 4- 0-26 = 0-44 4 12 322 -.5-6 8 4- 0-65 4- o'94 = - 0-14 i >, 12 '45 i6 - o ii - 1-34 4- 0-59 =4- 0-28 6 13 39 4- in 13 + 1-49 4- 0-54 = 4- 0-44 4 13 129 - 117 ii 1-37 4- 0-56 = 0-32 34 01 16 268 14-6 13 4- 1-52 4- 0-47 =4- 0-48 7 16 86 + 23-6 13 1-29 4-0-90 =4-2-18 2 ! 16 265 4- 16-9 12 4-1-58 4-0-35 =-0-82 3232 19 53 + n-8 13 1-35 4- 0-82 =0-50 7 18 236 4-11-9 9 4- 1-32 4-0-51 =4- 0-04 7 20 39 + 15-1 8 1-13 4- 0-19 = 0-28 8 ,, 21 201 -26-5 12 4- 1-48 4- 0-59 = - 2-05 8 20 37 - 13-8 3 1-14 + 1-08 = 4- 0-82 3412 22 I8 7 - 32-0 14 4- 1-62 4- o 21 = 0-94 3243 24 34 2O"4 10 1-22 4- 0'88 =4- I'20 3 2 5 152 - 25-9 H 4-1-62 4- 0-34 = 4- 0-02 4 2 4 339 - 6-8 13 1-18 4- -06 = 0-18 6 25 IS' + 3-8 10 4- 1-33 4- 0-69 =- 0-37 6 25 33 + 7-8 12 - 1-24 4- -07 = - 0-85 7 26 H3 - I5-9 13 4- 1-52 4- 0-40 = 1-16 3250 27 299 -t- 13-8 13 I-I I 4- '10 = 0-22 3420 23 174 - 157 10 4- 1-47 - 0-25 =- 0-67 4 28 289 - 7-6 I I 0-94 4- -io =4- 0-45 4 Mar. i 97 10-4 8 4- i-n 4- 0-55 = - 0-17 3261 Nov. 5 185 - 7'3 II 1-05 4- -oi = 0-15 3432 10 4- 7-0 9 4- 1-37 0-23 = 4- 0-86 4 7 1 60 - I3-5 9 -o'37 + '33 =+ - 97 7 ,, I0 337 -17-6 8 4- i"i8 4-0-04 =4-0-10 8 13 75 + II-2 8 0-69 4- 0-96 = 4- 0-84 8 12 39 + i5-3 13 4- 1-57 - o-n =4- 0-30 9 H 63 - 6-5 12 - 0-54 4- -55 = + 0-70 9 I! 328 - 4'4 8 4- i 'oo o'6o = 4- 0-17 3270 16 43 + 2I-I 10 - 0-94 4- -12 =4- 1-83 3442 15 271 - 4'5 12 4-1-56 0-44 = 4- 0-70 2 15 59 + 10-6 IO -0-24 + '54 =+ 1-13 3 16 264 4- 16-8 I I 4-1-45 0-06 = 0-25 6 18 15 + i9'3 13 -0-47 4- -51 =4-2-34 345 26 129 4- 6-8 12 4- 1-56 - o'44 =4- 1-94 3280 21 34 - 5-6 9 0-86 4- -05 = o-oo 3460 Apr. i 53 4- 9-8 12 4- rz6 1-04 = 4- 0-90 i 22 322 - 5'i 13 -0-38 4- -55 =4-0-86 4 ,, 2 33 4- 21-5 I I 4- i -20 0-67 = 0-30 3 21 333 20- 1 9 - '4i + '3 = + 0'24 5 3 22 4- 14-6 13 4- 1-38 0-76 = 0-56 7 21 332 + i9'4 10 4- 0-13 4- -58 = 4- 1-50 347i 7 ' 336 - i5' 2 13 4- i'i9 i 'oo = 4- 0-84 3290 ,, ' 3 220 + 18-2 1 1 -0-05 4- -51 =4-0-95 3 4 I - 27-4 5 Dec. 5 I 5 + 19-4 12 4-0-16 4- -64 =4-0-37 5 ,, io 295 4- 18-4 1 1 4-1-31 0-69 = + 0-25 7 6 I 39 + 21-6 I I -0-33 + '47 --077 8 i 288 4- 16-7 1 1 4- roo -- -13 = 0-85 8 6 130 + 19-2 12 o-oi 4- -63 = o-io 3485 18 183 - 14-9 13 + 1-08 - -co = 078 3302 13 46 - 157 10 4 0-76 4- -36 =4-0-17 6 20 152 - I3-3 13 4-1-20 -02 = 4- 0-46 4 '8 335 4- 18-8 10 o-oo 4- -52 = o 86 8 25 86 - 17-2 13 4-1-09 -ii = 0-26 5 19 33 - 0-8 12 4- 0-29 4- -63 = 1-03 9 2 5 88 - 29-2 12 4- 0-96 -32 = 0-40 6 19 333 - 8-6 9 4-0-12 4- -38 =4-0-97 349 2 28 55 + n'9 13 4-0-88 -30 =4-0-62 7 19 326 + 10-9 12 + 0-55 + -58 =4- 1-27 3 28 49 4- 22-8 I I 4- 1-16 0-85 = 0-48 9 20 3H - 5' 13 4- 0-41 4- -56 =4- 0-28 5 May i 20 + I5-5 9 4- 1-03 - 0-74 = 4- 0-33 3311 2 35 - 8-4 6 3 352 26-9 13 4- 0-97 i 24 =4- o-io 3 25 253 + ii'4 12 4- 0-51 4- 1-58 = 0-18 8 5 3i9 - 3-8 5 26 232 19-6 10 4- 0-29 4- -50 = + 0-36 354 7 ' 293 + 17-3 12 4- 0-94 .- 1-37 =4- 0-37 6 26 231 -27-8 I I 4- 0-08 4- -41 =4- 1-93 8 9 i 266 + 197 8 4- roo - 0-54 = 4- 0-17 8 27 221 - 3'5 9 4- 0-18 4- -41 = 1-36 3516 H i9 8 4- 6-3 8 4- 0-81 o'8i = o-oo 3321 2 5 2 4 2 + 18-6 8 4-0-41 4- -08 =4-0-54 8 16 181 14-6 12 4-0-17 -58 = -f 1-80 3 29 I 9 I I2'I 13 + '55 + '47 + 1-64 3520 18 148 - 127 13 4- 0-47 - -52 =4- i-oo 5 31 l6g - 7'5 13 4-071 4- -44 =4-0-36 I ,, 15 l8 3 4- 1 8-8 8 4- 0-05 -ii =4-0-16 4 20 126 - 15-0 1 1 4-0-26 - -47 =4-0-77 l8 94 . o 5 23 85 - I7-5 9 4- 0-76 -06 =4 0-90 33*8 Jan. i 154 -1- 17-6 8 0-18x4- -i52/=4-i'40 8 24 68 - 3'9 12 4- 0-50 -58 . 0-88 9 i I 5 6 - 7'9 13 4- 0-73 4- -43 =4- 0-04 9 25 57 - 15-3 8 4- 0-83 - 0-87 = + 0-33 3343 6 87 + 21-6 10 4- 0-95 4- -26 =4- 0-86 3>3o 25 53 - 19-9 13 4- 0-33 -56 =4- 1-20 5 9 51 - 14-2 13 + '94 + '3 = + " 6 4 2 28 '7 - 3'4 1 1 + 0-50 - -43 =4-0-40 335 ii 18 + 25-5 8 0-07 4- -14 =4- 0-03 3 2 9 357 4- 12-6 12 4-O'12 '60 =0-78 2 15 336 2'0 12 4- -02 4- -27 =4- 0-50 5 30 348 4-11-9 9 + 0-73 - -13 = O-gO 4 16 322 - i3'i 13 4- '14 4- "06 =4- o-io 7 June 2 3'5 4- 15-0 13 4- 0-30 -51 = 0-46 6 i7 310 + 117 13 4- -17 4- -04 =4- 0-26 354 1 3 299 - 3-8 8 4- 0-38 -06 = 0-37 8 18 284 + 3-8 12 4- -09 4- -17 =4-0-04 9 5 269 + 15-8 10 -0-16 - -54 -077 3360 20 267 - I4'9 13 4- -i 8 4- -07 = 4-0-12 3553 5 2/5 - 6-3 8 -0-55 - -io =4-2-04 i FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 21 TABLE VI. continued. No. Date on Mean M, No - No. Date on Mean Mean No. of Group. Centnil Meridian. Longi- tude. jyiean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Latitude. of Days. Equation. 1894. 1894. o o o 3554 June 9 218 I2'I 12 - o'36sc i - 57y = -f 2-20 3734 Oct. 9 41 + 18-1 13 - i-39x 4- o-75j/ = 4- i'54 5 9 210 19-2 8 4- 0-49 i -08 = O'i4 8 ii 20 + 9' 8 I i 1-22 4- 0-86 =4- 0-15 8 10 201 4- 6-0 12 0-28 r6o = 4- 0-05 3754 24 212 + 97 10 - i'33 + 077 =4-074 9 ii 187 - >7'o 13 0-09 1-56 = + 0-72 6 2 4 2OI - H'4 12 - 1-07 4- 1-23 =- 1-54 3562 13 162 - 15-0 9 4- 0-16 1-30 = 4- 076 9 24 203 + 47 9 0-75 4- i"i6 = 0-30 4 '4 148 + 6-; 9 + 0-17 - 1-31 = - 0-43 376i ,, 26 I 7 6 - 97 8 1-06 4-0-47 =4- i -06 5 6 128 + 9'i '3 - o'39 - i'53 -- 076 377 Nov. 3 77 + i3'9 13 079 4- 1-37 = 0-08 357 "4 158 - 47 6 5 54 + 12-0 1 1 1-18- 4- o'88 = 4- 0-55 3 18 103 4- IO'I 12 0-32 i~6o = 4- o'jo 7 5 5i + 7'4 12 - 0-94 4- 1-33 =+ i'i8 5 20 75 - H'4 12 0-3; 1-58 = I'20 3783 6 43 + n-8 o o'3 i 4- ri2 = 1-27 358i 25 360 + I2'8 13 - 0-40 i - 53 = 0-32 6 9 350 - 5'0 12 1-04 4- 1-24 = 4- 0-18 3 26 348 I'2 10 0*28 - i '49 = 077 3795 H 291 + 1 1 -6 9 - 0-48 4- 1-33 =4- 0-57 5 29 316 + l6'3 12 - 0-59 - 1-50 = -f 0-23 7 17 242 + 9 - o 10 - 0-87 4- 1-27 =4- 0-53 6 2 9 306 + 9' 2 8 4- 0-32 i -08 = 0-63 9 19 220 + 27 10 0-71 4- 1-36 = 1-64 3592 July 2 275 - 1I'9 8 0-71 0-93 = 4- 0-64 3801 20 211 - 137 9 + o-oi + 1-41 1-20 3 4 249 + i-3 9 0-43 1-28 = + 0-23 4 26 ! 34 + 8-6 12 o'4o 4- i -59 = 0-62 7 " )' 5 233 + 18-9 7 22 187 - I9'9 8 6 218 + 7'2 10 0-61 1-41 = n 3 3815 2 9 90 -r 23-9 9 4- 0-44 4- 1-26 = 4- o'io. 9 8 186 4- I2'2 13 0-69 i '41 = 0-42 2 30 77 + I I'O 3604 10 170 19-0 '4 0-84 i - 39 = o - 24 6 Dec. 5 1 1 - 18-4 13 0-09 4- 1-56 = 4- o'6o 5 10 168 -24-8 8 o-oo 1-13 = + 0-20 7 4 32 - I3-9 11 1+ 0^46 +1-42 =0-37 6 7 204 - >5'2 9 ri6 0-73 = 0-90 8 6 355 - i9'5 12 4- 0-05 4- i'6i = 0-30 3610 12 137 + 9-1 '3 0-86 1-33 = 4-0-62 3820 5 ii + 8-8 8 4- 0-35 4- no =4-0-13 3 '3 124 + 9'9 12 075 1-41 = 0-56 2 9 320 - 4'4 8 o - 6i + 0*90 = O'oo 3622 12 138 - 10-3 i'i i 0-40 = 4- 0-63 3 ii 300 + 1-6 ii o-io -f- 1-50 = + 0-28 4 17 77 I 2 "4 12 0-97 1-28 = -)- o-io 9 21 1 68 14-6 12 +0-40 + 1-63 =+0-37 8 17 66 I2'0 IO 0-62 - 1-31 = 0-44 3830 22 144 - 17-6 1 1 0-08 4- 1-45 = 4- 2 - io 9 18 56 + 7'5 '3 0-9; 1-27 = 4- 0-80 27 83 + 8-5 10 4- o-oi 4-1-51 = 0-27 3630 18 53 10-8 '3 - 0-86 1-32 = 4- 1-04 6 31 32 - 15-0 9 0-06 + 1-31 = i- 0-34 7 23 35 + 127 '3 I'2O I'OI = 4- O"O8 8 24 345 + H' 1 '4 1-17 i'2i = 4- 078 3640 25 328 - 87 10 1-28 - 0-89 = 1-07 IS 95 . o O o 2 27 301 + 18-4 13 1-2 1 i-oi = o'44 3842 Jan. 4 345 + 17-1 12 4- 0-462; 4- 1-55^ = 4- o'i6 5 ,, 29 281 - 21-8 12 I '27 I -01 = + O-02 6 6 3H + H'3 3652 Aug. 5 185 4- 10-3 '3 - ''35 ~ 73 = + 0-30 7 6 308 - I7J 13 4-0-71 4-1-40 = 4- 0-12 6 S 140 - ij'4 8 - 0-45 - 0-97 = + 073 3856 I 2 231 - H' 2 10 4- ro6 4- i'ii =4-0-30 7 8 H5 + i7'9 12 1-39 o"86 = 4- 0-60 3865 22 IOO + II'O 9 4- 074 t- i-i i = o"8o 3662 12 82 - i' - 4 12 - 1-47 - 0-67 = + 0-14 7 23 81 + 12-3 12 4- 1-24 4- 1-06 = 4- 0-80 3 '3 7i - H7 '3 - 1-37 - 074 =+ 1-18 3872 26 49 - 10-5 12 4-1-44 4- 0-8 1 = 0-25 8 17 26 + 6-4 12 i '50 0-65 = 070 4 28 '9 - 12-4 II + I '20 + 0-95 = -r 0-03 3672 20 347 - '9'5 8 073 0-84 = 0-17 5 3 SS 2 -17-6 12 4- 1-41 4- 0-85 =- 0-95 4 21 336 - 5'8 10 1-28 079 = 4- 070 3880 Feb. i 333 - 18-3 8 + 0-74 4- 0-87 = 4- 0-04 9 ,, *4 298 + >7'9 ; 9 0-84 0-99 = 0-06 3 3 301 - 1 8-6 9 4-0-66 + i'i3 = 0-30 3687 3 2ld 6'2 9 - 1-34 - 0-07 = 4- 1-23 4 3 303 -!- H'4 13 -f- -41 4-078 = 1-02 9 Sept. i ISO + 9 '6 10 1-27 077 = 1-07 3892 8 236 4- I3'8 12 4- -55 4- 0-53 = - 1-12 3 6 9 2 ,. z 175 14-1 1 1 i '44 o'O2 = o~68 4 8 233 + 18-9 10 + -39 4-0-55 =4-0-70 7 7 I0 5 - '57 10 1*48 + 0-19 = 4- n6 8 '5 H5 - 9-9 13 4- -51 4-0-49 -(-0-70 9 9 85 + 3'2 8 i'ii 0-23 = 4- 0-26 3901 15 137 - 18-5 9 + -24 4-0-59 =4-0-54 3700 ii 57 - 8-0 10 - 1-50 - 0-33 = + 0-63 3 20 74 IO - 1 1 1 4- -43 4-0-50 =4- 1-32 i 12 40 - 151 '3 - 1-56 + 0-15 = + 072 4 19 87 + 5'9 9 4- -40 4- 0-14 = 0-63 2 I2 42 4- 16-1 13 1-56 4- 0'20 = 0-42 e 22 49 - i3'i 1 1 4- -48 4- 0-03 = 4- 0-20 3 12 37 + 5'6 8 0-98 0-62 = o-oo 6 >. 24 28 - 4'2 12 4- -60 4- 0-39 = 0-08 4 ,, 12 35 + 9'2 9 1-19 0-63 = 4- 073 3910 26 356 + 9'4 8 4- -oo 4- 0-65 - 0-24 7 I' 53 + 20'I 8 ric -f- o - 2o = 2'33 i 28 334 + 12-9 12 4- -62 o-ii =4- i'20 37'6 17 328 - 10-7 8 - I'I2 - 0'33 .+ I'I3 6 Mar. 2 309 -f 13' 12 4- -62 4-0-21 =4- 1-03 7 '9 303 + 0-8 '3 1-58 + 0-19 = 0-26 39 2 3 3 286 - 6-0 12 4- -64 4- 0-06 = 0-37 37*0 18 313 - 7'9 9 1-15 H- 0-72 = 0-86 8 7 241 + i9'4 8 4- 0-96 4- 0-59 = - 0-47 i 25 234 + '9'4 1 1 -1-48 4- 0-22 = 4- roo 3932 ii 187 + i9'9 9 4- -20 4- 0-49 = 0-90 5 Oct. 3 119 + 10-3 '3 - 1-44 + 0-58 =+ 0-14 3 ii 183 + 139 12 4- '60 0-24 = 4- 0-48 8 5 96 - I3-9 9 1-25 0-03 0-40 4 12 174 + 12-1 13 4- -57 - 0-17 = - 0-92 3730 5 f 1 - 8-9 8 l'I2 4- O'OI = I'2O 3940 6 117 + 4'4 13 4- -57 - 0-22 = 4- 0-46 i 8 60 - 12-4 12 - 1-47 -f 075 = 4- 0-28 6 20 59 IO'I 12 4- -48 -0-71 =4-0-35 2 8 56 + I3-3 '3 - '"38 +079 = + 1-52 9 24 24 - 5' 1 I I 4- -35 -0-71 =-073 22 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. I8 95 . o o O I8 95 . o o o 3957 Mar. 30 291 + 18-2 II |+ I'zjx o'Siy = 0*50 4185 Sept. 30 24 - i5'4 1 1 - -i 7* + Q'Sjy =+ i' 2 5 8 3 1 283 - 6-5 7 Oct. 3 346 + 16-3 II -32 + 0-65 = 4- 2-05 9 Apr. 3 245 + 9'' 9 4- 1-23 0-32 = 0-60 9 6 305 + 21-3 13 '38 4- 076 = + 0-30 3960 7 199 18-9 10 + 1-48 0-15 - 0-63 4'97 i7 '57 + 13-6 I I -19 4- 0-85 = 4 0-72 4 8 184 + I2'2 10 + I '42 0-48 = + O'2O 4201 2 4 7i + 10-9 1 1 -oo 4- i'io = 4 0-53 8 ii 134 - I 4 -I 13 4- 1-33 0-87 = + 0-06 5 2 7 2 4 - 16-8 12 0-99 4 1-26 = 4 073 3975 16 66 - 9'7 13 4- 1-28 0-91 = 4- 0-46 6 27 2 5 + 14-0 10 i -i 8 + 0-94 = + 0-37 9 17 65 + I I'D 12 4- i-2i ro6 = 0-20 7 2 7 27 + 9' 2 12 0-98 + 1-36 = + 1-95 3988 24 322 + 17' 12 4- i-oi 1-29 = + 1-38 8 29 357 + 177 12 i-oi 4- i' 2 9 = o-io 9 26 302 + 2 3'9 13 + 0-94 1-27 = + 0-08 4210 Nov. i 324 + 9'4 II - 0-54 4- 1-39 = + 077 3995 3 244 - 25-0 IO + I'22 077 = 0-07 i 4 291 4- 1 1 '4 12 0-89 +1-40 =4- 0-75 6 26 295 - 13-1 8 4- 0-16 1-14 = 0-43 8 18 9 2 - 5'6 12 - 0-53 4 1-52 =+ 0-24 9 May 2 225 + i3'3 10 4- 1-18 0-97 = 4- 0-50 4221 2 7 2 - 27 13 : 0'45 4-I-5I = 4- 0'2O 4005 8 140 - 137 13 + 75 i '40 = 1-40 6 2 4 21 -15-6 13 0-32 4- 1-52 = 0-20 4019 18 13 - 18-7 8 + 0-87 074 = 4- i '26 9 2 6 360 + 18-9 IO 0-66 4-1-33 = o'io 4O22 "9 356 + 14-6 12 4- 0-64 1-52 = OMO 4230 28 331 4- 8-6 8 - 0-77 + 0-87 - + 0-97 3 20 345 4- 9-6 9 - 0-34 1-34 = 0-80 i 3 297 + ii'7 ii - 0-29 + 1-47 .+ 0-55 4 2 3 298 + 22-3 13 4-Q-ii i -54 =+0-40 6 Dec. 9 I8 3 - 6-3 IO + 0-26 +1-58 = 070 5 23 298 - 13-I 10 + 0-64 - 1-35 = + 0-37 9 12 H3 - 12-4 13 + 0-13 4- 1-56 =+ 1-92 7 2 5 280 + 2-5 12 + 0-42 - 1-59 =+ 070 4240. 12 137 - 197 9 0-58 4- 1-14 - 1-54 8 2 5 275 24-0 12 + 0-16 1-62 = 0-45 i H 124 4- 18-9 13 4- 0-04 + 1-59 . + 0-54 435 Z 9 230 + 4'5 9 + 0-64 1-18 = 0-24 2 H 123 - 22-6 IO o'2i +1-48 = + o-io 7 28 2 34 + 15-3 9 4- 0-24 - 1-32 = 4- 0-37 3 15 I 08 - 21-4 1 1 0-04 4~ i '47 = i' 2 4042 June i 187 - 6-9 8 + 0-42 1-03 = 1-24 7 H 118 + 4-3 8 + 0-59 40-99 =-0-23 6 6 121 + i5'9 10 + 0-44 - 1-42 =- 1-13 4250 22 16 + 16-1 12 + '35 + i'5 8 =+ 0-55 9 9 82 - I7-9 13 0-20 1-55 = 4- 0-78 i 21 3i -.3-6 IO 4- i-oo + 1-15 =+ 1-70 4052 ii 48 - !5'5 13 0-08 1-59 = 4- 1-06 2 ,, 2 2 15 - 8-5 IO 4- 0-64 4- 1-33 = + 2-87 3 12 39 - '3'5 ii + 0-18 1-47 = roo 4 23 359 + io'3 9 + 0-71 4- 1-23 =4- ro6 5 16 348 + 10-4 13 - '33 - i'53 = + 0-16 5 26 321 - 10-3 13 + 0-59 4- i -47 =4 0-62 7 19 39 + 21-4 13 0-45 1-50 = 0-06 6 27 33 - 12-8 12 + o 68 + 1-48 = 4- 0-78 4060 16 348 + 157 8 - 0-87 - 078 =+ 1-53 i 22 273 -23-8 10 0-07 1-48 = 1-23 1896. o O o 3 2 3 249 + 16-7 12 - 0-56 - 1-53 =- 0-32 4262 Jan. 2 228 + 11-9 12 4- 0-562 + i'52y = + o'6o 4072 2 9 176 + ii-3 8 4- O'20 I 'I 5 = O'OO 5 6 i So + 177 9 + 1-04 + 0-87 =+ 177 3 30 165 10-4 9 o-oo 1-35 = 0-80 4 2 77 22 3 2 4 10-6 13 + 1-17 4-1-06 =+ 0-82 5 28 184 - 8-6 8 076 0-88 = 0-84 8 2 3 34 - 14-0 12 + 1-22 + I-OS = + 0-57 6 July 2 133 - 9'9 8 0-36 i-io = 0-37 9 3' 208 - I9'3 H 4- 1-35 + i' =+ 0-74 7 6 77 - 18-4 12 -0-51 - 1-52 =-0-45 4281 28 241 + 77 8 4- 1-13 + 0-36 =4 0-24 9 8 S 2 4- 12-8 8 + O'I2 1'IZ = O'OO 4 Feb. 5 132 + H7 9 + 0-85 4- 0-99 = 0-03 4080 9 49 - 17-0 8 + 0-I7 - 1-09 = + 070 7 1 65 - u-8 8 4- 0-76 4 0-96 = 0-53 4 12 i - 6-2 12 1-09 i - 22 = ri8 4291 15 5 + 8-7 12 4- r6o 4- 0-35 = + i'io 5 ,, i 2 355 + 12-9 8 - 0-15 - 1-14 = + 0-54 5 2 3 256 4- 16-0 12 4-1-63 4- 0-26 = 4- 146 4095 17 297 - 15-2 ii - 1-23 - 0-84 = - 2-30 6 25 231 - H'3 '3 4-1-54 + 0-34 = 0-62 4104 3 127 - 12-7 1 1 0-97 i -08 = + 2-25 4300 28 192 - 2!'3 13 + rs 6 + '20 = + 0'5 6 6 Aug. 4 62 - 7'5 12 - i'33 - '9 2 =+ '37 2 Mar. 4 129 19-6 13 + 1-59 + 0-05 = 4 0-20 7 3 75 - 9'i 10 - i'4 2 - '55 =+ -27 3 7 95 - 117 13 + 1-55 - 0-19 = 4- 0-46 41 10 6 22 + 10-5 13 1-46 072 = 4- 0-24 43i6 22 255 - '7'3 8 4- i'O2 o'55 = 4 0-20 i 5 49 - 57 9 - 1-38 - 0-31 =- -63 43 2 i ,, 31 131 + 16-7 13 4- 1-46 0-65 = + 2'12 2 8 3 - 7-0 13 1-36 - 079 = + -42 5 Apr. 4 84 + 9' 8 4- 0-65 - 0-96 = 4- o-io 4 10 339 -f 16-0 13 1-41 070 = 4- -86 6 5 66 - 11-9 12 4- 1-49 0-70 = 0-50 4122 19 218 + 8-9 1 1 i '40 0-49 = 0-60 7 5 64 - I7-9 >3 + 1-38 0-78 = -f o-io 3 2 i 198 + 19-0 12 - i'55 -0-51 =- Q'97 4333 7 34 + I5-9 1 1 + 1-17 i -02 = 0-73 4'33 3 79 8-4 12 1-61 0-26 = 078 4342 26 148 + 1 1 -8 IO 4- i -08 i "08 = 0-30 8 3 1 55 10-4 I I 1-52 4 0-03 = 4- rzo 4359 May 26 107 - 9-6 9 4 0-69 i -20 = + 0-70 9 Sept. 2 28 + 10-8 H 1-68 0-14 = 4- 0-28 436i 2 9 72 IO'O 10 0-35 1-46 =4 0-83 4152 7 321 + 11-6 8 - i -oi - 0-54 = 4- 0-27 4 June 6 327 21'0 13 0-O3 1-58 = 0'12 4 5 357 + 17-8 8 0-95 + 0-69 - 4- 0-80 5 8 300 IO'I 12 + o'i3 i -6 1 = 4- 0-60 8 12 258 + 107 13 1-56 +0-01 = + 0-26 8 12 250 16-4 10 0-75 1-37 0-60 4171 22 130 - 14-9 12 1-60 4- 0-22 = 0-47 9 14 218 - i5'4 12 - '35 - i' 6 5 =- '"32 4180 3 26 + n-S 13 i '43 + 0-64 = 4- 0-96 4375 24 87 4- 197 I I 0-41 1-36 = 0-47 2 28 f~\ A. 54 + i5'4 10 1-07 4-1-09 = 0-14 9 July i 352 14-2 8 4.0-02 I-2I =4-0-63 3 Oct. 2 2 + 14-8 13 - 1-37 4- 0-69 = + 1-50 4380 i 358 - 9'5 8 0-86 0-78 = 0-24 4 ,, I 10 - 17-4 9 1-34 0-14 =4-0-63 6 ii 216 14-6 9 - 0-32 - 1-33 =- 0-13 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 23 TABLE VI. continued. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1896. o o o 1897. o o 4387 July 1 2 2 >3 - 6-7 8 0-05^ 'ijy = 4- 0-14 4580 June 3 238 - 16-8 9 + 0-762 -o8y = 4- 0-50 439 16 1 60 - i5'4 12 - 0-95 - '37 = - 0-30 8 2 7 271 - 87 13 -0-57 - -47 =4-0-08 5 '8 124 20-6 12 i '07 -2i = + 0-03 459 July 4 I 79 - 37 13 0-77 -40 =4- 0-66 9 '9 1 1 1 22-O 12 1-09 -i 8 = 0-94 2 9 116 I I-O 12 - o-77 - '42 = -1- '47 44.00 20 99 + 197 9 -0'55 - "22 =4-0-53 4 13 67 - 57 I I 0-71 -28 = 4- 0-05 3 2 4 58 - I0'5 10 1-38 076 = 070 4600 ^6 248 + 14-0 13 -17 1-06 = 4- 0-28 5 Aug. i 305 - 8-3 II 1-19 0-89 = 072 i 26 2 55 - 87 I I - -25 - 0-87 =4- 1-63 7 '5 121 20'I 13 1-43 o~6o = 4- 1-36 5 Aug. 8 68 - 5'6 13 -46 0-62 = o-io 4416 2 9 294 io'6 10 1-50 + 0-30 = + 0-43 6 1 42 - i5' 2 8 -0-67 -0-94 =-(-0-37 7 Sept. 5 21 I - 17-8 1 1 - i '45 ~ -2 5 =- 0-23 461 1 21 259 - 7'3 12 -55 0-42 = 0-62 44" 11 127 - i5' 2 8 1-17 o-oi = 4- 0-40 5 Sept. 5 7i - 5-6 13 -55 0-07 = + 0-80 6 5 7 + 10-9 10 1-43 0-38 0-27 7 6 5i + 14-9 13 -60 o-io = 0-14 8 16 56 + i3'i 12 i-66 +0-42 =+2-15 9 8 36 - 10-5 12 '67 4- o 08 = 0-47 4435 2 5 298 I2'I 12 i -60 +0-31 = 0-44 4621 9 22 - 7-0 9 -40 4- 0-26 = 4- 0-24 444 1 Oct. 1 2 73 4- 1C' I 8 1-13 0-09 = + 0-57 6 21 218 + 10-4 9 -32 0-27 = 4- o-io 5 2 1 320 - 6-5 10 0-91 + i' 2 5 = o - 6o 4630 2 3 I8 7 - 8-2 IO - -2i 4-0-88 =4-0-26 7 22 302 - 7'4 ii 1-09 4-i-oi =+0-83 i 2 6 144 4- I2'2 9 - -36 - o-oi =4- 1-37 8 2 3 289 - 7'3 8 1-14 4- 0-19 = 4- 0-97 2 26 H4 + 5'4 1 1 - -4; 4- 0-36 =+ i'43 9 2 3 286 + 5-3 10 1-29 4- 0-87 =4- 1-53 4 Oct. 2 73 - 6-2 12 -52 4- 0-60 =4-0-30 445' 3 203 - 14-7 IO i - 2i 4- 0-88 = 4- i-oo 5 ,, 2 62 + 9-8 12 - -49 4-071 =4-0-92 6 Nov. 8 76 - I5'4 12 - 0-66 4- 1-45 =4- 1-17 4649 Nov. 8 305 - n-6 8 -0-97 4-0-53 =4-0-87 7 9 65 - I5H 10 1-14 4- 0-96 = 4- 0-34 4656 Dec. 2 345 + 7'3 12 0-04 4- -66 =4- i '60 8 1 56 - H'7 10 1-03 4-1-04 = 170 9 7 276 - I5-4 10 4-0-09 4- -58 =4-1-20 4460 ii 40 - 6-6 9 4-0-10 4-1-38 =4-0-07 4663 i 2 211 + 9' 8 13 4- 0-06 4- '59 = 4- 0-40 I 13 '7 - 11-9 9 roo 4- 0-90 = 4- 0-06 5 '3 201 4- 1 1 -6 13 4- 0-18 4- -59 =4- 1-38 6 2 274 - 12-9 9 - 0-56 4- 1-15 =4- 0-97 4670 2 i 101 4- 2-9 IO - 0-03 4- -51 =4- 1-17 4470 , 2 6 198 + 6-0 10 0-57 4-1-41 =4- 0-06 2 Dec. 5 9 1 + 9'i 12 0-04 4- r6i = o-oo 1898. O o 3 5 78 -167 II -'53 + i'37 4-0-45 467 1 Jan. i 312 4- 13-8 13 4- 0-69x4- -42^=4- i -20 4 6 68 4- 2O'I 1 1 + 0-24 4- 1-46 = 4- 0-17 3 4 269 4- 6-6 12 4-0-89 4- -36 = + 0-97 8 8 40 - I 5 -0 8 4- 0-60 4- 0-95 = 4- 0-96 4 ,. 9 209 + 9'9 13 4- 0-93 4- -26 =+ 1-32 4480 '6 294 - 9'5 9 4- 0-69 4-1-08 =4- 0-13 6 17 101 - 14-8 9 4- 0-90 4- -03 =4- 1-07 8 2 5 186 + 5'6 1 1 + 0-62 + i '41 = + i'zo 7 20 65 - 8-4 12 4- no 4- -26 =o-2o 9 2 7 164 - 14-5 8 4- 0-98 4- 0-76 = o - 6o 8 22 35 + 10-3 ii 4- 079 4- -25 =4- 1-18 4681 2 5 358 + 4'4 13 4-1-26 4-0-99 =4-i'o8 1897. o o 4 Feb. 8 '75 - 8-4 10 4- 1-53 4- 0-37 =4- 0-37 449 > Jan. 4 49 - 1 3' 13 4- 078* 4- '37y = - 0-14 5 10 144 - I2-I 8 + 0-57 + 0-99 = - 0-03 3 6 22 - 6-9 8 0-06 4- -18 = 0-93 7 13 101 - 7'I 13 14-1-44 4- o'68 =4-0-14 7 9 343 - 6-9 12 + ro6 4- -23 = 1-22 8 H 89 - 8-4 12 4- 1-60 + 0-43 + 0-36 9 19 211 19-0 12 + 0-96 4- -28 = 0-43 4692 2, 3 + 5' 2 12 + 1-58 +0-42 =0-25 4500 19 206 - 8-4 II 4- 0-92 4- -14 =4- 0-67 5 ! zi 4 - 07 10 4- 1-53 4- o-oi = 4- o-io 4510 3i .58 + 57 I I 4- '07 4- -oo = 0-15 7 : 2 8 264 - 9'9 ii + 1-42 4- 0-18 = 4- 1-38 7 Feb. 2 2 3 - 2-3 12 4- -48 4- 0-83 = 1-80 8 . Mar. 6 190 - 8-2 13 4- 1-57 0-07 =4- 0-02 8 5 347 - S'4 13 + '37 + 077 = + 1-16 4702 ii I2O - i3' 2 12 4- 1-64 - 0-27 =4-0-53 4526 '5 212 + 6-5 12 + '59 + '44 = + '9 2 3 I2 116 + n-3 II 4-1-46 4- 0-03 = 4- 0-60 453' 28 4 6 + I2'l 13 + -56 4- 0-09 = 4- 0-04 4 13 104 - 7'9 12 4- 1-59 0-26 =+ o - 6o 2 Mar. i 35 - 0-8 10 4- '41 +0-55 =4-0-86 4713 Apr. 7 128 - 11-4 H + 1-46 0-80 = 4- 0-86 3 I 2 5 4-6 9 4- -29 4- 0-59 = 1-50 4726 May 12 20 - 6-1 13 4- 0-70 1-43 = 0-48 5 4 348 - 7'9 '3 4- -55 4- 0-13 =4- 1-12 473 2 ,, 22 2 4 5 - 13-6 12 + 1-55 - 0-48 =- 0-13 6 4 35 2 + 2'2 12 + '63 0-18 =4- 1-52 4749 : June 24 170 io'4 I I o'68 1-38 = 0-12 454' '4 217 + 47 ... 4764 Aug. 2 18 14-0 9 i -22 0-49 = 1-46 9 2 7 4' 2'I I I + '43 +o'37 =-0-25 5 5 334 + i'9 12 - 1-43 - 079 = + 1-65 4553 Apr. i 34' - I3-0 I I + -43 -0-32 =4-0-40 9 8 304 - 1 1-8 II I'2I 0-92 = 1-38 4 3 3i8 + 4'i 13 + -36 0-82 = 4- 0-48 477 i 2 245 + 10-3 8 I 'I 2 4- O"22 = 4- O-O7 5 5 289 - n-6 II + '33 078 = o-oo 8 Sept. i 34' + ii'3 12 1-64 4- '5 = '4o 6 7 262 - 3'3 13 4- '34 0-85 = + 0-26 4781 9 2 39 I2'I 13 1-54 4- 0-19 = 0-08 9 9 2 33 + 5'5 I I + -28 078 =- 1-37 6 .. 19 1 06 - 5'5 9 ; 1-23 4- 0-65 = 0-47 4560 10 224 + 3'3 8 4- 0-30 1-13 =4- o-io 8 Oct. i 3i3 4- 117 9 1-13 4-0-67 = 4- o-io 3 i 2 199 - 6-6 8 4- 076 0-85 = 0-97 9 4 265 - 5'5 12 1-52 +O'47 = O-70 4572 May 5 260 - 12-3 13 4- 0-94 1-25 - i-86 479 5 259 - 7' 2 8 1-13 0-08 = o-oo 3 7 233 + 37 12 4- 077 - 1-42 - 0-87 i 6 240 I2'I 13 - 1-38 4- 0-74 =4- 0-22 6 2 4 2 4- 17 8 4- 0-37 - i-io = - 0-33 4 i 2 154 - I3-4 8 T2O 4-'i2 =4-0-23 9 3' 270 - 9'i 13 + 0-09 1-58 = 0-40 4801 28 305 + H^ 13 ro8 4- 1-12 = + o - 68 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. Date on Mean ,. No. No. Date on Mean M No. of Group. Central Meridian. Longi- tude. Mean of Latitude. < Days _ Equation. of Group. Central Meridian. Longi- of Equation, tude. Latitude. DayS] 1898. o O o 1903. O o 4802 Oct. 30 279 + 6-6 10 ri8j: + o-gSv/ = 4- o - 8o 53 Jan. 28 34 - i 8-2 8 + 'oSa; O'ogy = 4- o'lo 5 Nov. 3 235 10-8 5 Feb. 1 5 I 12 + 23-9 1 1 4- -24 4- 071 = 0-82 7 5 206 + 6-7 IO - 0-60 + '42 = + 1-37 8 Mar. i 285 + 18-9 1 1 + -36 + 0-48 = + 1-05 8 7 170 - 107 12 -0-85 4- -42 = + 0-45 5013 27 37 + 21-3 '3 + -42 0-66 = 0-06 9 8 167 + 5'3 8 0-41 4- -15 = -\- o'zo 5 Apr. 2 229 -,6-4 1 1 + -48 - o-io = 0-98 4813 21 357 - I3-5 9 + '4 + '33 = -'57 7 8 I 4 I 19-8 13 + '37 76 = Q'i8 7 Dec. 3 202 - 7'7 12 0-13 4- -61 = 0-13 5023 28 237 - '4'i 10 4- '33 - '67 - i'23 9 8 I 3 2 + 12-4 12 o - io 4- -61 = 4- 0-18 4 29 228 + 20'0 12 H- o'8o 1-42 = + 0-17 6 May 2 I 9 2 + l6'5 8 + 1-04 0-47 = + O'o6 547 June 2 i 243 + I9' 8 12 - 0-48 - 1-54 = + 0-35 1899. O 5051 23 22 5 + 21-7 9 0-77 n i = + 0-23 4826 Jan. 6 103 - 8-6 10 4- 0-500- + i'39y = + 0-24 3 July 7 40 - 5 9'5 8 + 0-27 ro6 = 4- 0-30 7 5 116 - 5-2 9 + 0-88 4- 1-04 = 0-17 4 9 5 19-0 8 0-90 0-77 = 0-30 9 " 38 - i4'5 I 1 + 0-80 + 1-23 = + o'8o 5 ii 345 + 17-6 8 roi 0-63 = + 1-20 4836 3 156 - 11-3 8 + 0-42 + 0-94 = - 0-67 8 '9 234 + 137 9 n6 0-84 = 0-34 8 Feb. 6 57 10-8 ii + '28 4- 075 = 0-20 5068 Aug. 10 308 - 22-5 10 - 1-45 - 0-43 = + 0-77 4845 Mar. 2 1 217 - 9-0 13 4- -50 o'57 = o-oo 9 12 277 - 22-5 8 0-52 roo = 0-57 6 25 154 - 4-6 9 + -33 +0-04 = + 0-50 5070 I I 290 -23-8 9 1-32 - 0-31 = 1-63 8 Apr. I 61 - I2- 9 12 + -45 074 = + 0-02 2 15 234 + 21-2 1 1 - - 5 - '34 =+ i'37 4850 '5 244 - 7'2 II + -27 070 = 1-13 5083 Sept. 1 5 192 - I7-5 9 -25 0-43 = 0-66 4 26 101 + I I'O 8 + -09 - 0-37 = - 0-77 5091 Oct. 8 243 + '3'4 13 -41 + 072 = + 0-28 5 2 9 61 - 127 12 4~ 'O2 1-25 = 0-42 2 10 215 - 21-5 IO - -47 + 0-14 =+ 1-23 7 May 26 61 - 12-8 13 + 0-23 1-55 = - 076 3 ii 203 - 21-3 3 -36 4- 0-76 = 4- 0-48 4861 June i 7 131 - '37 8 + 0-13 no = + 0-13 5 20 92 + H' 6 '3 -io 4- -12 = 0-28 3 Z 9 33i + 57 12 0-50 1-59 = 4- 0-22 8 31 298 - 18-8 13 -04 4- -19 = - 1-48 5 July 10 180 IO'2 '3 0-75 1-41 = + 0-26 9 Nov. 4 249 + '5'5 8 - -05 4-0-39 =4-0-17 6 9 200 IO'I 10 - 0-99 - 1-15 = + 0-37 5100 5 233 + i7'i >3 0-94 4- -27 =4- 0-68 4887 Oct. 28 169 lO'O 1 1 ro i 4- no = 0-32 2 8 199 23-0 1 1 - 0-97 4- -05 =4- 1-88 4890 Nov. 17 267 - 57 1 1 - 0-84 + 1-17 =+ 0-43 3 9 190 22'O 1 1 0-87 4- -13 = no 6 Dec. 17 2 3 8 + 7-6 IO 4- 0'2O 4- I^I =070 4 ii ,64 24-6 13 0-86 4- -27 =4- 0-86 4* 1 169 - 21-6 1 1 -0-37 4- '43 =4-0-02 1900. " o 5111 21 21 - 16-3 9 0-81 4- -12 = n6 4901 Jan. 16 192 + 9'5 8 + 0-552; + rosy = 0-54 5 3 272 - 18-8 9 o'68 4- -12 =4- o - io 5 Feb. l 346 + 4'4 10 4-1-35 + 071 = 0'20 6 Dec. 3 230 + 16-4 12 0-32 4- -56 = + 0-82 7 i 235 i + I'I 9 + 0-91 + 0-98 = o-oo 7 7 u i I 7 8 2O'4 IO 0-46 4- -43 =4- 0-70 8 1 226 + I2 - 7 9 + 076 + I'll - 0'54 9 9 153 - 20-3 9 o-2i 4- -31 =4- 0-03 49'7 Apr. I 292 in '3 + -38 0'75 0-62 5120 9 '55 -27-8 10 0-66 4- -28 =4- 1-40 9 '3 134 + 8-5 8 + -05 0-37 = 0-66 6 i3 99 + i3'9 13 4- 0-22 4- -56 - 0-20 4920 25 332 + 3'9 8 + -13 -0-29 = + 0-23 9 '4 87 + I9' 6 '3 4- 0-28 4- -54 = + i '02 4 May 2 2 3 8 - 6-2 10 + '07 i '07 -- 0-26 5i3i <6 55 - 23-9 10 - 0-39 4- -44 =4- 1-44 5 3 229 - 8-6 10 + -24 0-89 = 073 4 21 349 + 22-4 '3 + 0-30 4- -52 - 0-62 i- / 2 245 - 7' 10 4- 0-27 -50 = 4- roo 9 27 272 + 4-> 12 + 0-42 - -58 =-0-37 1904. o O o 493 29 Z 45 - 8-2 8 0-38 '22 = 0-46 5142 Jan. 4 172 - I4-4 12 4- 0-682: 4- rifby = 4- 0-58 i June 19 327 + 3-6 10 0-51 '41 = 0'13 4 6 140 - 187 9 + 0-28 4- 1-24 - 0-54 2 24 257 - 7'2 8 + 0-14 -14 = o-io 6 10 84 + 18-1 13 4- o - 8i 4- 1-36 = 4- o-io 5. July 21 268 - 6-2 1 1 0-86 -20 =1-13 S'5 1 '9 329 + 20-4 12 + 0-94 -f- r26 O-22 4943 Oct. 22 1 1 7 - 5'0 12 1-27 + -oi = 4- o - io 2 20 3'3 + 22-2 IO 4- -07 4- 0-98 - 1-14 4 23 109 - 6-2 12 - 1-17 + -18 =+ 1-40 4 22 294 14-0 9 4- -30 -f- 0-26 = 0-30 5164 Feb. 10 37 + I2'8 13 4- -39 4- 0-69 = - 0-50 1901. o O o 5170 22 233 + '9' 1 1 4- -40 4- 0-53 = 070 4953 May 2 5 162 + 87 13 + O-ZO.B i 55^ = o-oo 24 207 - 12-9 13 4- -61 4- o-io = 0-54 5 June 2 1 169 4- lo-o I I 0'54 1-38 = 0-87 6 Mar. 9 23 - i9'4 9 4- -29 4- 0-44 !=+ 1-50 4962 Nov. 1 9 329 - 20-5 13 0-46 4- 1-51 = 0-96 5182 '5 3'3 - 16-6 '3 + '54 - '32 =-0-36 3 21 237 + 9'3 12 + -56 - 0-41 =- 1-92 igoz. o o 6 25 184 + in 8 4- -16 4- 0-25 = 0-36 49 6 3 Jan. 10 1 1 - 7-8 I I + 0-97* + I -I If/ = 0-58 7 27 151 4- 18-9 9 + -33 -0-14 =4-0-40 8 Mar. 8 333 + 24-6 12 + r6i 0-31 = 4- i',8 5'95 3' 105 + IS' 2 12 4- -45 -0-69 =-0-52 4972 May 29 325 + 25-8 12 4- 0-09 i '60 = + 0-58 8 Apr. 3 61 + I7-3 8 4- -17 - 0-16 =4- 1-27 4982 Sept. 27 161 20'9 I I 1-41 + 0-29 = 0-13 9 4 52 + 12-8 8 + -144- o-oi = 4- 0-27 3 Oct. 10 357 + 97 12 i '3 1 + i '04 = 4- 0-20 5200 6 18 + 17'9 1 1 4- -10 i -06 = 0-13 6 24 168 2O'6 9 - 0-49 + 1-33 =- 0-70 2 '4 276 - '5 - 9 13 4- "16 ro6 = 0-08 4990 Nov. 20 182 + '47 12 - 0-56 + 1-53 = + 0-42 4 16 245 + 6-6 IO + -43 - 0-46 - 0-03 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 25 TABLE VI. continued. No. of Group. Date on Central Meridian. Mean No. Longi- T Mean . of tude. Latitude. Days Equation. No. of Group. Date on Central Meridian. Mean Longi- T M . ea1 ' tude. Latitude. No. of Days. Equation. 1904. O o 7 274 + 197 9 -|- 0-17 '40 =+ r8o 545 2 14 2OI 4- 20-8 12 + 1-52 + 0-55 = - 0-50 9 9 250 + 137 8 ; 0-42 'O6 = O'OO 6 '5 I 79 + 11-5 j 8 + 0-59 4- 0-89 = o-io 5252 19 I2O - 16-2 13 0-32 - -52 = 2-40 T 16 I 7 6 14-0 9 4- i'oo 4-0-79 =4- i -oo 3 19 I 2O + 12-5 '3 0-31 -53 =4- 0-68 5466 21 109 22-6 10 + 1-42 + 0-33 = + 0-76 6 24 49 4- 19-6 1 1 0-28 -43 = 0-43 9 2 3 79 14-8 II + 1-36 4- 0-57 = 0-27 9 July 2 312 - 191 10 o-2i '51 =4- i'io 5470 26 37 4- 6-4 12 4- 1-60 4- 0-41 = 0-34 5262 6 261 4- 16-0 12 0-74 -46 = 0-40 i Mar. 3 329 - 16-8 13 4- 1-55 4-0-13 = 0-18 4 H '45 + 13-' 13 0-84 -33 =4- 0-82 3 8 271 4- 10-5 12 4- i'59 0-02 = 0-27 9 21 58 - 19-1 1 1 i '04 -09 = 1-50 5481 20 I 10 22-7 : 12 4- i'55 - o'3 2 =- 0-73 52/3 27 337 4- 20-6 8 0-25 -08 = 0-30 2 9 118 II'3 9 4-1-28 0-31 = 0-07 5 . 2 8 326 + 23-4 1 1 - 0-87 - -2i =4- 1-53 5 25 39 - I7-2 1 1 4- i '46 o- 1 o = 4- i '7 5281 30 295 - i7'4 8 1-12 0-43 = 4 o-io 9 3i 325 - '5'5 12 4-1-52 0-56 = ro7 2 Aug. 2 258 + ii'3 8 1-13 o'O2 = 4- 0-97 5491 April 2 299 + 17-9 ... 3 8 181 + 26-2 12 1-30 o'go = 4- o-io 4 9 212 + .18-4 9 + 0-98 0-93 = 4- 0-60 5 10 156 + i3'i 12 1-38 0-84 = 0-68 5500 14 138 + 5'9 6 13 109 - 13-1 10 0-97 i 14 = 0-70 i 15 "7 - 20-3 10 4- 0-81 1-17 =4- 1-07 5291 17 59 - 18-3 9 0-84 roi = 4- 0-56 2 16 109 ... 6 28 282 - 17-6 12 - '63 - 0-33 - 1-05 5 ' ' 8 88 13-1 8 29 256 - 14-1 I I -40 0-39 = o'6o 5512 26 345 + 13-6 10 4- 0-98 i'22 = + 1-07 9 ,, 28 275 4- 19-0 9 - -23 + 0-08 = + 0-34 9 May 6 206 + 22-2 II + 0-36 - 1-43 =+ 0-98 5300 Sept. i 229 - 18-5 9 -18 0-64 = 0-50 55 2 4 9 1 60 + '3'i 9 + 0-13 1-35 = + 0-70 53'3 19 342 21 'O 8 0-86 4-0-83 =4-0-80 8 '6 76 + 16-0 10 + 0-63 - 1-33 =4- 0-57 6 27 242 4- 3'' 2 13 -48 + 0-48 = 4 0-16 9 64 15'! 12 + 0-67 - 1-52 =+ 0-45 S3 22 Oct. 1 1 53 - 17-2 12 '33 + i'O2 = i -oo 554 27 294 + 5'5 5 13 23 4- 13-0 13 -18 4- i -05 = 0-52 2 June 5 167 4 10-7 8 + o'i6 1-03 = 0-77 9 18 321 - 23-0 9 -17 4- 048 =4- n6 3 161 + 14-1 8 + 0-29 1-05 = 1-17 533' 20 298 - 22-5 10 0-68 +1-44 = 0-33 6 1 105 - 8-0 ..'. 2 23 262 + 15-0 8 n6 4- 0-29 = 4- 0-17 555 13 70 - '5'9 12 0-13 1-63 = 4- 0-03 6 2 7 205 + 9'5 9 0-85 + 0-98 =0-07 2 14 56 12 0-16 1-59 =4- i'io 8 25 231 + 13-2 8 0-15 4- -ii =4- 0-60 3 4 - i5'4 12 0-05 1-65 = 0-30 9 26 217 + 11-4 9 0-34 4- -23 = no 9 20 33i - 22-8 5343 Nov. 2 127 - 16-8 12 ro7 4- -26 = 4 0-27 55 6 4 25 2 59 4- 6-2 12 - 0-52 - 1-56 =4-0-27 535' 7 60 1 6-0 12 0-96 + -26 = 0-40 5577 July 7 too I2'O 11 0-93 1-15 = 0-38 6 16 300 - 22-5 12 - 078 + -39 =+ 1-38 9 8 88 - 37 9 0-31 1-29 = 0-80 8 18 270 21-6 8 - 077 + 077 =- 1-27 5586 II 52 12 - 077 - 1-45 =- 1-08 5360 22 219 + 10-6 12 -073 + -44 =4-0-53 9 16 34 2 + I3'I 12 - 077 - 1-43 =4- 0-57 4 25 83 4- 2O'o 13 o'34 4- -54 = 1-52 5593 '8 3'7 I I '2 10 0-45 1-41 = 0-26 537 2 30 120 - i7-3 8 + 0-05 4- -14 =4-0-33 4 20 297 - H7 10 0-63 1-33 = O'o6 538i Dec. i o 352 4- 20-8 12 + o'o6 4- -59 = 0-28 5 22 265 + 7-8 8 O'I2 I'll =+ O'6o 3 u 334 + i7'Q 12 0-04 4- -61 =4- 0-34 7 18 319 + 13-9 ... 7 10 352 + 8-9 8 4-0-33 4- -15 =4-0-80 5607 Aug. 5 77 4 1 6-0 8 13 303 + H-5 8 0-36 4- -13 = 0-94 8 6 67 - 12-4 9 '4 290 + 12-5 12 0-08 4- -65 = 0-38 5610 6 67 4- 18-1 . . . 539 16 268 + 167 13 4- 0-26 4- -53 =4- 0-18 i ,, 7 61 - 16-3 i 16 264 + 23-2 8 0-28 4- -08 = 0-16 4 8 43 - 6-3 6 i 240 4- 28-5 9 - 0-39 + '25 =4- i'33 5620 12 347 4- 12-2 13 -40 0-77 = 1-48 54'3 30 75 - 15-1 8 + '-05 + 0-45 =4- 0-36 2 14 3 2 3 + 147 1 1 - '35 -o'59 = o'oo 6 20 251 4- 6-0 10 - -45 -0-48 =4-0-17 1905 O o o 7 23 204 + 97 IO -20 0-88 = 4- 0-43 5416 Jan. 8 323 - 17-9 10 4- i'23K 4- o'Sg?/ = 1-23 5630 25 177 4- 20-5 8 - 073 - 0-87 = - 0-44 7 i >, I! 277 j + 12-4 10 + 0-61 4-1-40 =4- 0-47 8 30 114 + 15-8 1 1 - '38 -0-53 =- 1-07 5420 12 263 4- 17-4 9 + 0-37 4- 1-29 = o-io 9 Sept. 3 61 - 18-6 9 -34 + 0-30 = + 0-63 i 13 2 55 4- 21-0 3 4- 0-89 4-1-29 = 0-36 5641 2 73 + 13*4 9 '28 4- 0-61 = 4- 2'o6 4 15 225 + 9'4 12 4-1-07 + i '23 =4- 0-37 3 4 44 + 7-8 1 1 - -49 4- 0-26 =4- 1-35 6 '7 194 4- i3'3 10 4- 1-17 4- 0-90 = 1-17 5653 10 326 4- 12-6 8 - -05 -0-34 = + 0.43 POSITION OF SUN'S Axis. 26 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. Date on Mean No. No. Date on Mean No. of Central Group. Meridian. Longi- Mean tude. Latitude. of Days. Equation. of Group. Central Meridian. Longi- Mf" tude. Latitude. of Equation. Days. 1905. o o 1906. o o S 6 5S Sept. 13 286 + 2-4 12 -632; o'o$y = 4- r68 5818 Mar. ii 88 - 6-1 10 + -443; o-62y =4-0-33 8 H 2 7 - 14-4 II '50 0-28 = 4- 076 5821 zi 313 + 16-6 12 + -52 0-46 = + 1-42 9 15 257 14-6 10 '51 -f 0-06 = 170 2 22 295 - 8-0 1 1 4- '46 o-i 6 = 0-35 5660 '5 ; 259 + i5'4 12 -60 4- 0-36 = + 0-43 6 24 ( 275 + H'o 13 + '5o - 0-45 =- 1-44 2 18 220 - 13-1 9 - -33 -o-io =-0-47 5 2' ! 3'3 - '7-4 9 4- -07 0-90 = i-io 5672 Oct. 4 16 + 21-6 9 -29 4- 0-09 = 0-66 9 22 297 - 13-0 9 + "25 - '55 =- i'3 6 3 2 40 + 6-0 8 25 262 + 15-2 9 4- '26 4- 0-26 = 0-43 4 5 35' - 17-0 ... 5830 27 244 8-5 12 + '49 '5 8 = + '94 5 8 321 - 8-1 . .. 4 29 214 - 16-6 8 + -12 - 0-37 = - 0-13 6 9 307 + 8-8 : 10 1-12 + 0-96 = o - 6o 7 Apr. i 172 - 137 12 + '3 8 - 0-93 =- 1-70 5680 '4 236 + I2'0 10 O'Sg +I-27 = + 0'20 5843 6 106 + 19'' 13 + -34 0^85 = o-io 2 20 162 + I3-9 12 1-26 + roo = 4- o'45 9 11 43 + 24-0 13 4- -16 0-99 = 0-48 5 28 58 + 6-6 H I'I2 +I - 24 = + O-24 5852 12 20 19-2 12 + -25 0-97 = + 0-04 7 29 44 + 7'i 5 20 274 + I5-9 13 + '21 POO = + O-O6 5691 Nov. 4 327 + 12-5 10 i-iz + I'oo = 0-07 9 28 174 + I2'0 10 + 0-43 - -45 =+ 1-50 8 8 265 + 20'I 8 0-93 + 0-64 = + 0-20 5865 May I o 16 + 7'2 13 + 0-69 - -44 =+ 176 5702 i 248 + 8'2 10 0-36 4- 1-45 =+ 0-27 6 II 6 2IM H + o'8i -48 = + o-io 3 ' 239 + I3-4 1 - 0-57 + 1-35 =- 0-63 7 '2 355 + 12-6 i3 4- 0-49 -50 = + 0-82 5 ,. 12 213 + 10-4 10 i -i 6 4- 0-97 = 4- 1-67 9 15 34 + 14-3 9 0^05 '32 =4- 0-20 6 13 203 + 6-4 9 1-08 + 079 = o-oo 5870 25 182 + 9-5 13 4-0-21 -60 = -f- 0-06 7 II 229 24-6 i 28 131 + 1 1-9 13 + 0-04 -57 = 0-92 8 '4 194 + 6-4 ... 2 27 155 + 7-8 io -0-39 - -41 =4-0-50 5710 ii 230 + 9'2 - 6 31 104 u-2 8 4-0-13 -io = 1-84 i '2 213 + 5'8 ... 8 June 5 3 + IS'' 1 1 4-0-06 -56 =4-0-25 2 16 168 + 12-3 ii 078 +1-23 = + 0-15 5881 7 - 25-1 9 4-0-44 - -26 =4-0-73 3 i7 '57 - '7'4 4-0-18 4-1-16 =+0-50 2 7 7 - 17-6 8 4-0-10 - -17 =-0-54 6 16 1 60 + H'l 8 + 0-24 + 1-15 = 4- 0-83 5 ii 305 + 14-2 13 4- o'O2 -54 = 0-38 7 21 IOO + 13-5 .- 9 H 135 +11-6 12 0-56 -51 = 0-80 5720 24 59 + S'4 9 0-25 + 1-29 = 4- 0-90 5892 26 112 + 4'0 io 0-32 -54 =0-40 i 25 46 + 67 ... 3 3 66 i + 6-1 12 0-65 '52 = + 074 5 28 8 - I5-4 6 2 9 76 + 21-8 12 0-90 '34 = 1-03 6 2 5 43 -15-6 ... 4 July i 45 + I2'2 12 O'8l '40 = 4- 2"IO 9 29 347 - '5-4 5 i 4' - 9 '6 12 073 '45 = O'20 5730 3 335 + 13-2 10 + 0-27 + 1-50 =- 1-33 7 2 3' + 16-8 8 0-05 -12 = O'OO 3 Dec. i 320 - i'3'7 o o - i i 4-1-49 = i - 2O 8 ., 4 6 4-21-0 H 0-90 -40 = 4- O'2O 7 8 232 + 97 5901 4 9 + I0'2 ii 0-72 -30 = 0-40 9 1 214 - 25-4 ... 4 5 355 + II'I 9 0-88 0-95 = 1-77 574 10 210 + 5'2 5 5 355 + 177 9 -1-05 - 0-73 =4- 0-43 4 13 '74 - 9-6 3 6 342 + 21-3 10 1-15 0-92 = 0-14 7 18 98 + 8-1 ... 8 io 290 4- 18-6 ii o'8o ri6 = 0-55 575 '9 84 + 9'6 5912 16 201 4- I7'9 12 0-98 1-28 =4- 0-33 6 '9 84 1 5-1 7 17 193 + '9'9 8 1-13 0-27 = 0-13 5765 3 308 - 137 ... 5 8 187 4- 8-0 3 18 178 + 8-7 13 0-94 1-28 =4- 0-72 1906. o 8 18 179 - n-i 10 1-39 0-79 = i -06 5766 Jan. i 279 - 8-2 10 + 0-132+ -52y =+ 1-53 5922 22 134 + 8-8 10 0-76 1-30 = 0-83 5774 '3 H5 + 12-3 9 + 0-45 + -26 =+ 1-67 3 24 104 | + 4'2 13 1-17 i -08 = o"68 5 H 104 + 8-2 13 + 0-95 + -29 = 4- 0-44 4 24 97 + 3'4 13 1-03 1-20 = 0-44 7 15 93 + 12-2 8 + 0-12 + -14 =+ 1-17 6 26 74 + 57 ... 5783 25 326 + I2'3 IO 4- -16 + -io =+ 1-24 8 28 48 + 9'o 8 0-27 1-07 = 4- 0-13 5 24 332 - II'4 10 + '41 + 0-62 = 0-50 5930 26 75 - 9-2 8 -08 0-41 = 0-37 7 26 307 i ri 9 4- o - 8o +1-17 = + 0-80 i 3' i + 2Z-O H '33 1-02 = + 0-30 8 28 287 - 7'4 12 4- -26 + 1-06 = 073 3 30 24 - I5-3 9 '26 0-51 = P26 579 26 301 + 15-2 10 + -44 4- 072 = + 0-24 5 Aug. 1 3 200 + I8'S 13 - '44 - o'59 - - 0- 36 i Feb. i 233 + i7'3 12 :+ -29 +0-94 = + 0-40 8 13 195 - I7-2 IO - -46 -0-58 =4-0-53 8 10 107 + 8-6 12 + -32 +0-90 = + 0-26 5942 20 105 + n-5 8 -i 6 4-0-02 = 0-60 5802 20 339 I0'8, 13 + -53 +0-40 =+0-94 4 ,, 26 24 16-7 12 '61 0-19 = 4- 0-70 3 ,, 22 309 + 13-3 12 + '64 +0-26 =0-42 6 28 354 +227 H -64 0*27 = 0-26 6 23 298 + 16-3 II 4- '46 +O-29 =+O'30 595 26 23 - 4'9 9 - '37 +0-31 =4-0-10 7 22 307 - 13-8 8 + -15 O'IO = -f I'2O 2 27 16 - 9-3 8 - 0-98 4- 0-54 = - 0-43 5815 Mar. 7 138 - 14-6 9 + -24 + 0-39 = + 1-50 6 Sept. 4 274 + 5'3 1 1 - -51 -0-27 =+0-35 6 12 75 + 4'9 13 + -58 0-13 = 0-66 8 4 266 - 9-6 1 1 -50 o'io = o'oz 7 10 105 + 2O'O 9 + M2 075 = 4- P20 5960 8 217 4- 18-8 12 - -52 - 0-48 =- 2-37 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 27 TABLE VI. continued. No. Date on i Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- -*" tude. Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Q f Latitude. Days _ Equation. 1906. o o 1907. o O o 5961 Sept. 9 198 21-2 12 -622; + o-i5?/ = + 2-43 6150 Mar. 1 9 2O2 + 8-6 1 1 4- 1-37*- o-6oy =- 0-95 5 13 H 6 + 9-4 I I -48 4- 0-07 = 0-03 2 21 180 - 9' 2 8 + 1-09 4- 0-39 = 0-44 6 17 IOI + 4'6 9 '13 o - 6i = 4-0-50 6 Apr. 4 35 6 + 12-2 12 4-1-47 - 0-63 =- 0-85 8 i? 93 + 8-4 14 '64 + 0-37 = 0-62 9 6 324 + 1 1-6 13 + 1-40 070 = 0-82 9 2 52 - I9-4 9 - -36 - 0-19 = - 0-34 8 5 348 + '5'5 JO + i -i i i '04 = 0-90 5983 3 280 19-8 ii -24 4- 078 = + 0'20 6161 8 33 - 177 12 + 1-41 - 74 =+ i'37 6001 Nov. 4 183 + 15-8 12 -08 + i -2 1 = 0-86 4 ii 264 -15-8 I I 4- 1-31 0-59 =4- 0-25 4 13 61 10-6 12 0-62 + 1-48 = 0-40 5 ii 265 - 5-8 9 + 1-05 0^4 = o - 2o 6 '4 So - 12-5 10 I -08 4- 0-98 = 0-07 6170 23 98 + 12-6 8 + 1-07 - 0-38 =- 0-53 8 16 33 + 6-9 9 - 0-87 + 0-94 = 0-43 2 25 77 + 7'i 12 4- i '20 1-14 =4- 0-30 6015 23 292 - 23-9 10 0-65 4- -36 = 4- 0-30 5 27 56 - 6-3 8 4- 0-52 ro8 =4- 0-13 6021 2 9 210 + '0-5 13 0-40 + -53 = 1-26 6181 May 4 322 - 8-4 8 o'i7 i-i i = 0-97 4 3 196 + i7'i 12 0-17 4- -64 = + 0'20 4 9 246 - I2 '5 13 4- 0-82 1-33 = 4- 0-02 6 28 225 + 20-3 9 + 0-36 + -36 =+o-io 5 9 246 + 4'9 10 + 0-30 1-50 = 0-14 6030 Dec. i I8 7 + i5'4 9 -0'54 + -25 =-0-17 7 '5 177 I2'O 9 4- 0-36 - 1-30 =- 073 6027 2 I 80 + 17-8 072 -f 0-95 = o-io 9 ,l 22 82 + 77 9 4-0-82 ro6 =4-0-57 6034 H 63 - 12-5 -0-45 + -03 =+0-70 6197 June 4 271 - 15-9 12 4- o - 2o i - 6i = + 0^62 6042 '6 346 + I 2'0 12 + 0-30 4- -61 = 4- 2-03 6201 15 128 - 19-2 I I 4- 0-34 - 1-40 =4- 0-87 5 18 323 + 13-8 '4 + '44 + -6 3 = + 0-02 2 6 H5 + I 1-2 I I O'I2 I'JO = I-2O 6 18 321 i6 - o 14 + 0-41 -\- -6 1 = +0-42 4 16 117 2 I '2 8 O-24 I -08 =+ O'gO 8 18 331 + 13' 9 + 0-36 + -30 = O'2O 5 '9 66 - I4-4 13 0-24 i -57 =4- '3 9 19 3'I + 14-6 8 4- 0-84 + 0-84 = o'io 621 1 July 7 194 + 3'5 1 1 - 0-83 - 1-29 =4- '57 6051 ., 24 240 + i9'9 ii + 0-27 + -45 = + 0-93 5 I? 64 - 18-6 13 1-07 i '14 = 0-14 3 2 5 227 + 17-9 ii + 0-66 + -31 = 0-43 6 17 53 - 5'4 13 0-86 1-37 = 4- 0-26 6220 26 33 - 7'8 13 1-25 0-99 = 0-36 3 2 9 252 + 7-5 12 i '2 5 i - o6 = i-oo 5 Aug. 2 2OI + 9'5 IO 072 1-30 =+0-24 1907. o o 6 ,, 2 198 - 87 12 - i'35 - '97 =+ 1-36 6059 Jan. 3 107 + 7'3 12 + 0742; 4- i'48y = 'oo 7 4 184 I O'O IO o - 94 i'i2 =4- i'2O 8 2 132 - 6-; 9 + 0-94 + 0-97 = + 1-13 6231 7 H5 + 8-0 9 1-29 4- 0-03 = 0-97 6062 I 135 - 12-3 8 + 0-90 4- 0-64 = - 0-43 2 ii 89 - I3'8 8 0-55 0-98 = + 0-17 6 >i 7 62 + 8-8 10 + 0-27 + -47 = _ 0-36 3 13 37 - 19-2 13 1-36 078 = 0-38 6075 H 3*9 - i3'2 12 + 0-87 + -41 = - 078 4 16 27 + I5'5 13 - 1-52 - 0-47 =- 076 6 15 323 - i3'9 13 + 0-84 + -35 =-2-32 6 19 333 -23-6 12 - 1-53 -0-56 =- 0-93 7 5 319 2O'6 12 4- 0-92 + -30 = i - i6 8 21 310 - 7'9 12 - 1-41 - 079 =- 0-15 6081 i5 3H - 16-2 I I + -18 + 0-95 = 2-10 9 25 265 - 14-1 12 1-55 0-46 =4- 1-50 7 21 231 + 20-3 12 + -14 + MO = 0-80 6241 Sept. 2 153 + 7'6 13 1-54 0-24 = + no 8 21 231 - 15-7 12 4- - i8 + -14 =0-20 3 " 4 133 - 16-6 8 i 1 1 4- o'4 2 = i -44 6090 26 174 + 4-8 13 + -29 4- 0-95 = 0-38 5 7 9 1 + 6-5 12 1-64 + O'22 = O'30 3 27 158 + 8-8 12 + -17 + 1-15 = + 0-23 7 ii 37 - 7'8 I I 1-47 + 0-06 = 078 8 3 H3 + 7'9 12 + -30 + 0-94 = 4- roo 6252 12 28 - 7'i ... 9 Feb. 2 82 + 21-6 II + -27 +073 =+0-30 6249 ,, 'I 3 4- 1 6-2 8 - 1-13 -0-24 =- 0-93 6100 2 73 + I I'O I I + '35 +0'S7 = + 0-32 6253 13 5 4- 9' 6 9 1-36 O-O2 = I '07 i 4 54 + 11-3 I I 4- -05 + 0-99 = 4- 070 5 1 6 326 - 23-0 12 - I'55 4-0-27 =- 1-82 4 7 12 - 14-1 10 + ^1 +0-21 = + 0-50 6 18 309 + 7' 2 H i - 68 4- o - 2O = 076 3 10 337 - I3-4 13 4- -50 +0-59 =4-0-10 9 23 243 + 7' 2 12 1-57 + 0-40 =4- 0-90 7 ii 322 - 4'i 13 4- -48 + 0-60 = 0-34 6260 23 244 - i7'4 12 1-56 + 0-39 = - 0-32 8 12 306 - 16-6 12 4- '57 +0-44 = 2-00 3 24 230 - i4'4 I I -1-44 + 0-19 =4- 0-97 6113 19 221 + 14-4 I I + '34 + 0-59 =-0-55 7 Oct. i 135 - 17-0 13 1-42 + o - 6i = o - 88 7 23 164 + 3'6 13 + -54 + 0-28 =- 0-54 8 Sept. 27 191 + 6-5 o 0-59 + i'oi =+0-63 8 22 171 - 13- 9 + '35 ' 2 9 = 4- '2o 9 Oct. i "37 + 8-1 1 1 ri3 + 0*90 = 0-90 9 22 177 + 9'9 8 + -15 -0-18 =-0-33 6270 ,, i 138 - 9-0 o 1-13 4- o - 39 = i-io 0121 27 III - 8-0 10 + -36 + 074 =+ 1-17 i 6 72 - 12-8 IO 1-45 + o-2i = 4- o-io 3 Mar. i 77 + 23-3 1 1 + '46 4- 0-29 = 0-40 3 9 36 - 5'4 8 ro6 0-24 = + 0-44 9 3 60 - 15-8 8 + -21 0'17 = 4- O-I7 6 ,, 12 352 22'I ii 0-93 4- ro8 = 1-22 6131 5 25 + 8-9 10 + >6 +0-36 =-0'53 7 12 343 - 22-8 10 0-96 4- i'5 = o'o6 4 8 357 + 127 12 4- '63 0-06 = 4- 1-20 9 IS 3'5 - 6'2 12 -i'33 + '93 =4-0-40 5 9 345 16-0 I I 4- '47 + 0-06 = 4- 0-02 6280 15 3'i + 7'5 13 1-24 4- '96 = o'oo 6 2 339 - "37 13 + -54 0-15 = 0-16 6278 II i - "'5 8 0-44 + i' 2 = '44 8 6 H - 6-0 9 + -35 0-28 = 0-97 6281 IS 309 - 6-8 8 0-96 + 0-52 = 4- 1-80 9 1 317 -17-9 8 4- -04 + 0-44 = + 0-17 2 19 254 + 57 13 1-28 4-0-96 =+0-30 6140 I 39 - 16-6 13 + '55 o-io = 0-64 3 ,, 20 238 + 87 13 ro; 4-1-19 = 0-56 5 15 2 54 - 13-5 8 + -13 0-27 = 0-67 4 21 228 + 8-1 12 - 1-37 4- 0-85 =4- o-io 28 POSITION OF THE SUN'S Axis, TABLE VI. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- T M .f n , hide. Latitude. of Duys. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. 1907. o o 1908. o o o 6285 Oct. 22 221 + 10-3 12 I -283: + \'Q\y = 0-90 6447 June 5 IOI + 117 8 + 0-452: - -Q32/ =- 1-23 9 28 H3 - 1 6-2 12 i-i i + ri6 = 1-12 8 6 05 II-I ii +0-19 '46 = + o - 6o 6291 Nov. 2 77 + 9'2 6453 15 333 + 10-4 12 : O'I2 '62 = O'6o 3 8 353 2O'6 10 1-19 + 0:91 = 0-23 7 ,, 22 244 + 57 8 1+0-31 - -15 = + 0-27 6 9 339 14-6 12 o'68 4- 1-49 = + 0-32 6464 29 54 - 3' 12 0-63 -48 = + 0-28 7 ii 319 - 6-8 8 0-98 + 0-63 = 0-57 5 ,, 30 131 - 15-5 13 - 0-52 - -47 = + 0-68 8 9 338 + 9'2 9 o'o8 + 1-33 = + 0-50 6 July 4 87 + '4'4 9 - 0-09 - -25 = - 1-54 6300 i5 265 + 1 1'4 13 0-51 +1-49 = + 0-86 6472 10 355 + 10-5 10 : 0-47 -43 = - 1-16 i i5 259 + 7'i 12 0-86 +1-35 = 0-42 8 20 235 20-1 12 1-03 -27 = + 0-16 3 ,, 16 244 + 13-6 10 0-82 + 1-23 = 0-74 6481 : 20 225 - 207 1 I 0-88 -17 = r62 6312 H 26 113 - 4' 2 8 0-70 + 0-94 = 1-23 2 ! 19 249 - I'9 8 - -04 - 0-43 =- 1-30 6 Dec. 6 34i - '3'3 '3 0-14 +1-59 = + 0-60 6 19 245 + H-6 8 -08 0-25 = + 0-04 8 n 277 + i2'7 '3 + 0-06 + 1-55 = 0-06 9 M 27 127 -16-3 12 - -19 - i-u =- 1-53 9 i 2 265 + 9' 6 13 + 0-12 + 1-54 = 0-02 6490 Aug. 4 26 - 15-0 13 -25 0-92 = + 0-64 6321 13 253 + 7'9 10 + 0-02 +1-50 = 1-64 i 6 + n'9 14 -48 0-77 = 4 68 2 i 288 - 8-5 8 + 0-66 4- 0-95 = 073 2 ,. 4 24 + 77 10 -49 o-i i = + i -oo 3 16 216 - iS'5 9 + 0-86 + 1-02 = + o-io 4 7 347 - 6-8 10 - -47 - 0-32 = - 0-77 4 21 H3 - 5 >0 13 + 0-22 +1-54 = O-08 6500 ' 18 208 - 14-6 10 -39 0-62 = 0-14 6 25 IOI - 7'3 1 1 + 0-59 4- 1-36 = + 0-40 3 ,, 20 ,85 - i5'i 12 - '53 -0-50 =-0-53 9 3i '4 + J9' 6 8 0-29 4-1-13 = 4- o'8o 651 3 1 35 + 6-8 12 '59 '34 = ' 6 7 i 3 1 3' -13-8 13 , -54 0-25 = + 0-28 3 Sept. i 20 + 18-6 8 0-84 0-73 = o-io 1908. ' o o 7 3 355 - 6-4 '3 '57 - '4 = + ' 18 6333 Jan. 6 302 - 6-9 IO - 0-040-+ -\iy = + 1-17 8 2 i + 13-2 9 - -34 + 0-09 = + 0-40 5 8 276 + 13-6 9 + 0'22 4- -27 = 0-30 9 ' .. 9 280 - 5-5 14 '67 o-oi = 0-40 8 9 262 + 11-4 12 + 0-87 + -39 =4-0-10 6520 9 268 + 12-3 13 -60 + 0-24 = + 2-46 9 9 262 + 6-8 10 + 0-45 + -44 =+ 1-20 2 262 + 13-6 12 "62 + 0-30 = 4- 1-30 6344 'i 227 - 16-2 13 + 0-80 4- -38 = 0-08 4 12 232 - 127 II - '37 + 0'39 =- 1-85 9 '7 148 - 4'i 13 + 0-95 + -24 = 0-66 5 16 183 - 2-5 13 '55 + ' 2 7 = - 66 6356 Feb. 3 283 + 22-4 10 + "5 + '5 = + '94 6 ,, 20 129 + 9-0 12 -59 + o-ii = 1-4.7 6364 H 140 + 10-5 9 + -06 + 0-86 = 0-13 9 22 98 12-4 10 - -44 +0-39 =-0-34 6 '5 134 - 7'4 8 + '04 + 0-46 = + 0-63 6530 24 75 + i 6 ' 2 8 0-97 0-38 = o'io 6372 26 345 - H-S '3 + '55 + ' 2 4 = o-66 3 26 45 + 9'2 13 -60 + 0-39 = 070 7 Mar. i o '74 - 15-8 8 + -oi + 0-57 = + 1-63 4 26 55 + 7-8 10 -38 + 078 = + 0-66 9 13 133 - 4-0 9 + -27 +0-49 = + 0-87 5 3 357 - 6 7 IO -54 +0-02 = + 0-74 6382 15 IOI - 7'9 12 + -62 0-29 = + 0-32 Oct. 3 313 - 12-2 12 - '39 + '79 = + '4 3 19 49 + 9-5 10 + -46 0-05 = 0-87 9 6 279 - 5'3 13 -35 4- o - 8i = 0-82 5 21 35 - 37 II + -43 0-19 = + 072 6540 6 272 + I2'O '3 -42 + 0-63 - 1-18 6 21 24 - 8-5 II + -46 +0-07 =4-0-05 i 6 271 - 6-9 9 -31 + 0-19 = 0-67 6390 Apr. 6 181 9-3 II + -21 0-86 = 0'20 7 13. ; 185 + 67 9 - -34 +0-19 =-0-13 i 6 173 - 9'2 10 + -36 - 0-55 = - 1-37 6558 Nov. 3 272 + 12-8 I I - -07 + -02 = - 0'45 2 4 205 - 1 6-6 8 + 0-46 1-06 = + 0-96 9 8 208 13-9 ii 0-92 + '16 = 4- 0-63 3 7 161 - J 5'3 ii + -08 i-oo = no 6562 10 178 + 8-9 1 1 - 0-67 + -55 = + 070 4 9 131 14-8 8 + -13 4-0-15 =+ 1-24 i 9 I 9 6 + I3-8 9 -0-19 + -40 = + 0-44 6 153 - I5'4 9 + -04 0-73" = o-oo 4 ii 164 + 1 1-8 ii - 0-33 + '44 - 2-03 8 1 123 - 8-6 10 + -31 0-66 = 0-50 5 ii 158 + u-6 ii - 0-12 + -44 = - 1-03 6401 15 57 - 7'i 13 + '26 0-99 = 0-78 7 18 76 + 3-4 IZ 0-25 + -62 = 0-93 6 2 3 308 - 3'0 12 + -07 -24 = + 0-06 9 19 62 + 10-9 9 - 0-04 + -35 = 0-04 7 24 295 7'6 12 + -05 -23 = 0-68 6574 ! 29 296 16-9 10 + 0-17 + -44 =+1-07 6414 30 217 16-9 10 + '3 -075 = + 0-13 5 Dec. 6 194 12'6 10 0-62 + -39 = 0-30 6 May 3 184 8-9 12 + 0-99 -29 = - 0-23 7 8 168 + I 2 '' 13 O'OO + '60 = O'OO 8 2 192 + 14*' 'I + 0-56 -37 = 4- o'68 6583 18 32 10-8 ! 9 + 0-75 + '15 - '43 9 4 170 I 1-6 12 + '97 - '3i = + 0-42 4 '9 25 + 5'9 10 + 0-87 + -27 =+2-34 6420 5 162 - H'9 '3 + 0-62 -46 = + 0-56 8 25 307 - 16-2 1 1 + 0-85 + -25 = o-oo i 4 1 68 - 5-2 8 + 0-91 o"68 = 4- 0-74 6590 30 240 + '7'3 8 + 0-64 + -02 = + 0'47 4 i" 7i + 117 10 + 0-91 -22 =4- 1-07 643' '4 35 12-6 10 + 072 - '33 = + '57 6 19 331 +11-4 3 + 0-41 - -55 - 0-64 : 1909. o O 7 19 323 + 8-3 8 + 0-59 -05 = + i-io 6591 Jan. 3 187 + 9-0 13 4- 0772; + \-\\y = - 0-92 6440 June i 159 - i5-i 12 + 0-27 - '57 =- ' '67 2 5 167 + ii-o 12 + 0-80 + 1-43 = + 0-80 i ,, 2 144 - 3-0 12 + 0-27 -61 = 0-23 9 12 62 + I0'2 12 + 1-05 + 1-28 = + 070 5 5 108 + 107 10 + 0-06 - -5, =+ i-57 6601 '4 32 - i7'3 8 4- 0-20 + 1-16 = 0-50 6 5 106 107 10 +0-12 -52 = + 0-67 2 '9 3 2 7 - 3' 13 + 1-19 + 0-99 =- 0-38 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 29 TABLE VI. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Longi- Meridian. tude. Mean Latitude. of Days. Equation. 1909. o o o 1909. o o 6603 Jan. 20 Ji6 - 13-3 12 4- 0-87.7; + '34y = 0-65 6753 Oct. 31 170 + 1-6 '3 i-oix + i'2$y = 0-48 4 22 297 + 6-9 '3 + rij 4- -oi = 0-46 4 > 3 1 168 - 14-1 13 1-03 4- I -2 I = 0-40 6 2 9 209 + 9-3 12 4- i'26 + -01 = o'97 6 Nov. 6 93 - 6-0 13 0-82 4- 1-38 = 0-66 7 2 9 203 8-9 '3 + i -2 5 4- 0-98 = i 'oo 6760 8 66 4- i2'i 9 0-93 4- i'oo = 4- o"6o 8 3 192 + 89 12 4- i'22 + -09 = + 1-44 5 ., '7 3' 2 - 4-2 12 0-32 4- i'6i = 1-56 9 Feb. i 167 + 9-1 12 4- i "28 4- -oo = 4- 0-12 6 i7 305 - 7-5 9 0-82 4- 1-09 = 0-14 6610 2 152 i6'6 '3 4- i '35 + 0-8 1 = 0-60 9 ,, '7 309 + I2-I 8 4-0-33 4- no = 1-56 i Jan. 29 206 5-2 9 4- i '3 1 4- 0-49 0-67 6770 : 22 236 + 5'9 8 0-29 4-1-15 = 1-17 8 Feb. 1 5 332 - 3-0 10 + i'26 +0-80 =+0-17 I 26 183 - I 4 -I 12 0-30 4-1-62 = roo 6620 '6 329 ID'S 1 1 4- i '63. 4- o - 2o = 0-43 2 28 167 ~ I3H I 2 - '33 4- 1-59 =- 0-18 i 8 299 + 97 13 + 1-53 + 0-43 = 4- 0-08 4 , 27 168 + 137 5 26 192 21-3 13 4-i'si + 0-27 = 4- 1-42 8 Dec. 3 98 - 3'5 8 0-72 4- 0-94 = 0-33 7 ., 28 167 + lo-o '3 + I- 54 + 0-18 = + 0-62 6780 i 118 - 4'7 8 4- 0-26 4-1-19 = 1*14 8 Mar. i 151 - 16-8 11 + I- 33 4-0-56 =+0-28 1 ,, 4 74 - 12-3 12 + 0-25 4- 1-53 = + 0-03 9 ii ' '55 - 6-2 '3 4- i '59 4- 0-12 4- 0-94 3 19 250 4- 11-7 12 4-0-25 4-1-63 =4- 1-68 6630 2 146 7-8 13 4- 1-58 0-04 = 4- 1-68 4 ! 20 232 - 16-2 . .. i Feb. 28 "74 + 87 8 1+ 1-06 0-41 =+0-40 6 ,, 24 184 - 12-9 '3 4- 0-57 4- 1-44 =4- i' 22 2 Mar. 3 '25 + 3'4 12 +1-64 o-oi = 4-1-60 7 2 5 172 I2'I 12 4- 0-46 4- 1-53 = + 0-28 7 '5 336 - 8-9 13 4- i'6i 0-02 = 0-12 8 25 170 + 15' 12 4- 0-41 4- 1-54 = 0-08 6642 2 4 208 +11-4 12 4- i'52 0-58 = 4- i-io 6791 29 118 4- 9'4 '3 4- 0-68 4-1-40 = o'02 3 25 198 20-7 9 4- i'33 4- 0-19 = 4-047 3 3' 84 - '5'4 '3 4- 0-53 4- i -47 - 0-06 4 25 '93 + 8-2 >3 + ''55 '3 6 = 4- 078 6 25 203 - 97 1 1 4- 1-40 o - 6i = 4- 173 7 27 167 + 97 12 4- i '5 1 0-64 = o'oo 1910. o o 8 29 153 - 5'i 8 4- i'i2 4-0-12 =4- 0-40 6796 Jan. 2 57 + 4'3 12 4- 0-802: + i - 44j/ = 4- 0-04 6651 Apr. 3 76 IO"2 I 2 4-1-40 0-91 = 4- 0-83 6805 '5 246 - 4-0 12 4- -06 4- 1-22 = 1-32 2 ,, 4 7' + lO'I 12 4-1-47 - 0-78 = 4- 0-24 6 24 '35 - 7-6 13 4- -26 4- i - o2 = 0-98 5 2 218 + 9'o I I 4- i '23 0-85 = 0-70 8 i, 27 8' > - "'3 I I 4- -32 + 0-79 = - 0-42 6660 ,, 24 160 - 6-9 12 4- 1-19 1-07 = + 0-88 9 28 82 1 6-0 13 4- '29 4- 0-89 = 4- 0-90 ' ,, 23 170 + 9'i 8 4- 0-89 0-67 = 0-24 6811 2 9 66 + 6-5 12 4- -18 4- i-i2 - 0-90 3 3 87 - 9'4 9 4- 0-96 roo = o'8o 3 Feb. 1 6 1 86 - 3'9 12 4- -56 4-0-37 =4-0-10 6 May i 64 - 12 '9 8 + 0-07 - i-i- = 4- 0-40 5 '9 '55 - 14-8 9 4- -33 + 0-19 = 4- i -oo 7 1 302 + 97 1 1 4- 0-80 1-20 = 0-50 6 22 10? - 10-3 9 4- -18 4- 0-65 = 4- 0-70 8 '3 2/5 - '37 12 4- 0-69 1-45 = + 0-07 7 22 i5 - 6-5 1 1 + -52 4-0-03 =4-0-30 9 ,. '3 266 - 16-5 13 4- 0-68 1-42 = 1-98 8 23 97 - 7'o 1 1 4- '48 4- 0-24 =4- 1-30 6671 ., 23 140 - 17-5 6822 28 34 - iS-7 8 4- -15 -0-43 =-0-40 2 ,, 24 132 l6'2 9 4-0-10 1-28 = 4- 0-43 3 Mar. 2 359 4- 18-2 8 4- 'oo '54 = 0-67 4 ,, 28 68 16-9 12 4- 0-56 1-48 =4- 0-76 6 '5 188 I2'5 12 4- -61 0-28 = 4- 0-42 8 June 12 238 - 19-0 I I 4- 0-09 1-47 = + 0-37 7 21 "5 - 7 '4 I0 4- -47 4- 0-08 = 0-46 6683 22 97 - 11-9 8 - 0-87 0-84 = 4- 0-93 8 2 9 4 + 15-8 12 4- -58 -0-33 =4-0-12 6 J uly i 347 I'2 12 - 0-59 - 1-50 =4- 0-75 6832 Apr. 1 5 141 - 7'5 I 1 4- -38 0-60 = 0-70 6690 ,, 1 6 150 + 6-2 8 - 0-71 0-92 = 4- 0-77 6842 May 5 242 + 1-9 9 4- -14 -076 -0-33 3 ., 2I 74 + 5-9 13 I'OI 1-23 = C-22 5 '3 129 1 6'o 12 4-0-54 1-51 =- 0-30 5 , 2 4 39 + 6-2 '3 1-20 I-05 = O'62 7 18 64 - 10-7 I I 4- 0-81 i"2O = 0-63 7.,, 24 4' + 10-3 9 - 0-79 no = 4- 1-57 9 '9 50 10-9 12 4- 0-39 1-62 = 1-84 8 25 3' - 6-3 8 0-36 i-ii =4- 0-93 6855 3' 253 + 3'4 I I 4- 0-52 1-41 = rn 9 -, 28 339 + I51 13 i -i 2 ri2 =4- 0-04 6861 June 29 230 - 6-3 8 4- 0-26 i-io = + 0-23 6703 Aug. 5 236 - 15-6 8 - 1-05 - 0-57 =- 2-37 4 July 6 '39 4- 7'9 12 0-97 1-25 = o-i2 4 ,, 6 229 - 18-3 9 1-20 0-63 = 4- 0-66 5 6 '33 + 87 IO 0-07 1-46 = i -24 6 n 156 - 13-8 8 1-18 0-18 = 0-40 9 18 335 - 5'4 8 0-06 i 'i 3 =4- o'93 671 1 20 4 2 + 7'2 12 - 1-48 0-64 = 0-57 6871 3' 165 10-3 8 0-54 0-97 = + 0-07 6722 Sept. 8 '54 - 12-4 10 1-50 4- 0-29 = 4- 0-70 3 Aug. 2 146 - 7'i 1 1 -05 i -02 =4- 1-63 3 '57 - 2-3 10 - 1-38 4- 0-67 =- 1-44 4 i. 9 48 - 15-3 '3 - '37 - 073 o-oo 24 306 - 4-8 '4 - 1-63 4- 0-43 =- 1-42 9 3' "7 - 8-4 8 - -02 4-0-53 =4-0-03 9 >. 22 325 -167 9 0-99 4- 0-86 = o-io 6880 Sept. 5 47 - '5'9 12 -61 4- ' 2 = 0-50 6733 Oct. 4 168 - 12-6 i3 - 1-45 4- 0-70 =4- 1-44 5 22 186 10-4 10 - -40 4-0-55 =4-0-27 4 ' .. 4 167 - 0-9 '3 1-46 4- 0-67 = 0-24 6 26 128 - 6-6 12 - '5' 4-0-53 =4-0-75 6 7 129 - 12-6 ii - ''36 + 074 =4-0-25 6890 29 9 10-9 10 -48 4- 0-26 = 4- 0-30 8 ,. ii 80 - 9-5 12 - 1-41 + 0-83 =+ 1-12 3 Oct. 2 58 - 12-4 12 - '55 +0-59 -0-25 6741 '3 5' + 9'7 '3 1-27 4- 0-97 = 078 4 3 47 - '4'1 '3 - '37 4- 0-78 =- 2-70 5 20 318 - 37 8 1-14 4- o'i 5 o-oo 7 21 1 60 4- 6-3 12 - -12 4- 1-16 = 4- 1-82 6 20 3'* - 5'5 1 1 0-94 4- 1*1 6 = 0-40 9 2 4 '3' - 7'9 12 - -35 4-0-81 =-0-55 6751 28 207 + 5'9 10 1-14 4- 0-92 = 0-20 6901 27 88 - 9-7 IO - -30 4- 0-75 = - 0-84 30 POSITION OF THE SUN'S Axis, TABLE V I. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Longi- Meridian. tude. Mean Latitude. of Days. Equation. 1911. o o o 191 I. o 6921 Jan. 9 1 88 4-5 12 + o-64r + i - 47/ = + 0-20 6964 Sept, 6 2 55 + 6-3 10 i "473; o"}8y = + 0-90 5 Feb. 151 58 i 1 1-5 12 + 1-38 + 0-82' = + 0-27 6972 .Nov. 27 264 2*0 12 0'39 + 1-58 = 0'22 7 16 49 ; - 13-6 9 + 0-92 + 0-95 = +- O'20 8 Mar. 4 196 r6 10 + -35 +0-66 = + 0-94 I 6937 Apr. i 193 - 1-8 10 + -30 0-97 = + 0-64 1912. o 8 7 1 08 + 97 10 + '47 -0-22 =+0'37 6977 Mar. 1 3 295 - i*'5 12 + 1-633; 0-17^ = + 0-60 6940 9 87 - 8-4 '3 + -26 0-94 = + 0^26 6982 May 5 304 I P2 10 + roo rii = + 0-74 2 27 203 - 1-8 13 + -07 1-17 = 0-14 6992 i June 23 27 - 5'9 I 2 - 0-43 1-57 = 0-60 4 28 189 - 6-1 12 + '93 - i'33 =- '' 00 5 July 9 176 - 3' 9 0-81 1-02 = 0-37 5 28 188 - 10-5 I I + roi i -07 = + 0-03 8 Sept. 1 1 4' - 5' 8 -1M2 0-42 = + 0-40 6951 May 30 125 + 8-6 12 -1- 0-13 1-63 = + 0-95 9 '5 353 - 8'5 9 - 1-21 + 0-52 =+ 0-~3 6961 Aug. i o 259 12-0 10 1-25 0-86 = -f- 0-63 7005 Dec. 1 7 203 - r8 1 1 + 0-21 + 1-51 = + 0-58 II. Determination of the Position of the Sun's Axis by Comparison of the Latitude of a Group of Spots when near the Central Meridian with the Mean of the Latitudes of the same Group when near the East and West Limb. The method described on pp. 5 to 8 proceeds on the assumption that the difference of the apparent latitude of a spot-group near the East and West limbs may be treated as an accidental error except so far as it arises from an error in the position of the Sun's Axis. The proper motion of each group is treated as an accidental error, and contributes the largest part of the quantities on the right hand side in the equations on pp. 11 to 30. But if the proper motion of a group of spots is uniform during its motion across the disc, an equation obtained by comparing the apparent latitude of a group in the middle of its course with the mean of the apparent latitudes when it is nearer the limb, will be free from the error introduced by the proper motions. Thus in the example given on pp. 4 and 8, Group 6806, the equation derived from the mean of the first five days when the group is near the East limb is 0-933; + 0-14^ 8-i2=z ..... (a) Similarly the last five days when the group is near to the West limb lead to the equation -0-33* o-SBy 7-i4 = z . . . (j8) Similarly the three middle days of observation when the group was near the Central Meridian lead to the equation + o-6i.<: o-jjy 7-6o = g . (y) In the previous section, the equation 1-26* +i-Q2y = +o-98 (8) obtained by subtracting equation (/3) from equation (a) has been formed. Subtracting (7) from the mean of (a) and (/3), we find 0-312 +O'4oz/ = +o"O3 ... . () FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. The smallness of the coefficients of x and y in the equation (e) as compared with those of the equation (<5) would make it of small weight, if the right hand sides of the two equations arose entirely from errors of measurement and other errors of purely accidental character. But the equation (e) has two advantages over the equation (<5). The orientation error of the photograph is entirely eliminated. This is important as the same orientation error might persist for a series of spot groups which occurred at the same time of the year. More important than this, the proper motion of each spot, as far as it is linear, is eliminated. In consequence of this the right hand sides of the equations similar to (e) have a much smaller accidental error than those similar to equation (S). In the case, therefore, of all groups observed for eleven or more consecutive days, a second equation has been formed by subtracting the equation derived from the determinations of latitude made near the Central Meridian from the mean of the two equations given by those made near the two limbs respectively. Thus in a group observed for eleven consecutive days the first four days and last four days were used to form the two limb equations, the remaining three days, in the middle of the period of observation, to form the central equation. With groups observed for twelve days the four middle days were used for the central equation. So with groups of either thirteen or fourteen days duration, the first five days and last five days gave the limb equations, and the middle three or four days, as the case might be, afforded the central equation. The following catalogue gives the equations thus obtained from the comparison of the limb and central equations : 31 TABLE VII. SECOND CATALOGUE OF GROUPS OF SUN SPOTS USED FOE THE DETERMINATION OF THE ERROR IN THE ADOPTED POSITION OF THE SUN'S AXIS. Latitudes of Spots observed near the Central Meridian compared with the Mean of the Latitudes observed near the Limbs. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1874. o o o 1875. o o o 83 May 2 296 - 13-1 1 1 + 0-292: + o-iSy = + o'lg '47 Feb. 28 269 + 4-6 12 o-i 5-c + 0-423^ = + 0-33 5 6 247 - 4'9 1 1 + 0-35 +0-14 = + 0-56 150 Mar. 1 7 47 - 37 1 I + o'oi + 0-35 = o-oo 7 '2 '57 - 6-9 12 + 0-42 + o - i6 = + 0-25 i 23 321 + 18-2 13 + OMI +0'45 =+0-43 90 3 279 + U-2 I I + 0-37 o'03 = 0-04 4 Apr. 1 4 3' + 9-0 I 1 + 0-31 +0-23 = o - i8 4 June 20 '3 + lO-g I I + 0^36 O'I2 =+0'28 5 16 10 - 13-8 12 + 0-25 +0-35 = + 0-45 9 July 7 139 ~ 5'2 12 + 0-37 0'25 = 0-31 6* 3 182 - 6-3 I I + O - 26 -f- O'2I = O'O3 IOO 10 1 02 - 10-5 '3 + 0-39 0-27 = 0-18 7 May 2 '59 + 9'2 12 -f 0-32 + 0-29 = 0-39 3 20 33 + 18-4 I I + 0-29 0-17 =+0-05 1 60 June 5 61 IO'2 I I + 0-36 0-07 = 0-31 S 29 216 + 6-6 12 + 0-29 - 0-34 = 0-46 6 July 3 1 47 + 8-3 II + O'22 O - 32 = 0-55 7 Aug. 5 H3 + u-2 12 + 0-23 - 0-39 = o'02 8 Aug. 27 48 + 7'3 II + 0-13 -0-33 =+0-09 110 >4 358 + 2-0 '3 + O'2O 0-43 = 0-44 184 Nov. 24 309 - 7'2 I I 0-36 O'O2 = + O'28 i 16 333 - 18-1 12 + 0'2I O'38 =0'31 5 2 4 231 - 15-2 I I + 0-05 o'35 = + 0-02 127 Oct. 4 44 - 13-0 13 0-19 0-41 = + 0-38 "35 Nov. 1 7 184 + 7' 12 0-48 o'io = o - 47 1876. o 192 Jan. 23 240 I2'2 12 O-27Z + 0'32// = O'22 1875- O o o 6 Feb. 1 7 286 - '3' z 13 0'25 + 0-41 = O'O7 '45 Feb. 24 321 + 18-2 13 o - 05a; + o*44y = 0-14 204 Mar. 2 5 '54 + H^ II + 0-16 + 0-37 =0-37 6 2 4 321 - 11-4 I I + 0-04 + 0-33 = - 0-03 231 Dec. 23 '45 + I0'2 12 0-38 +0-19 = 0-18 32 POSITION OF THE SUN'S Axis, TABLE VII. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. 1877. o o 1881. o o o 232 Jan. 1 5 95 + 9'i 13 o'29.c + o"$6y = 0-08 515 July 9 203 + H' 8 12 + 0-390; 0-32); = + 0-85 3 '9 '47 4- u-i 1 1 0-24 + 0-27 = 4- 0*06 6 '4 142 19-6 1 I + O"26 0*23 = 4-O'2I 5 Feb. 1 2 '95 4- 9-1 II 0-15 + 0-34 = + 0-29 522 2 4 9 + i9'4 12 + O'33 O-26 = 0-25 261 Nov. i 335 8-1 13 0-39 0-24 = 0*24 5 28 3i9 + 2 4 -I 12 + 0-21 0-38 = 4-0-17 4 *8 335 - 10-3 12 0-42 OM3 = + O'O2 6 29 307 + 27-1 13 4- 0-24 0-36 = - 0-15 538 Aug. 7 180 + 12-9 13 + 0-22 0-40 = + 0-56 1878. o O o 549 26 2 93 + 28-4 13 + 0-09 - 0-43 < + 0-04 272 June i 64 + 8-5 I I + 0-383; o-oi?/ = 4- 0-51 55 2 28 266 + 14-8 12 o'oo 0-44 = 4- 0-80 7 Sept. 8 188 + 3'9 12 4- 0-03 0-46 = + 0*19 3 28 263 4- 20-4 12 + 0-01 0-43 = 0-15 8 Nov. 3 163 4- 10-4 12 0-37 0-22 = + 0-23 561 Sept. 4 179 - 25-2 12 + 0-03 0-44 = 4-0-16 S7i 18 35 2 + 17-6 "3 0-09 0-44 = 0-17 1879. o 2 18 347 + 22-9 12 o-io 0-39 = o'i8 286 Sept. i 142 4- 28-5 II o-26x o - 33j/ = 4- 0-14 5 2 5 2 57 + 20-8 13 O'lg 0-44 = 4-0-08 295 Nov. 1 2 267 22-2 12 0-41 0-14 = 0-39 6 Oct. i 170 + H' 6 13 o-i 6 0-43 = + 0-07 586 i 2 39 + H' 12 0-24 0-38 = + 0'02 1880. O o 9 20 289 + 1 6-0 13 0-33 -0-32 =-0-04 301 Jan. 8 241 + i9'4 12 0-373; + 0-2527 = 4- 0-29 59 22 262 + I4' 2 13 0-32 0-32 = + 0-25 8 Feb. 5 2 33 4- 20-2 13 0-2.0 4- 0-41 = -f- 0-03 i 22 262 + 21-0 ii 0-18 0-31 = 0-21 9 5 2 33 - iS'4 12 0-23 + 0-36 = o'oi 2 22 ! 260 - I9-5 12 0-30 0-28 = O'23 310 9 184 4- 27-4 ii 0-17 +0-27 = + 0-63 8 Nov. 8 41 + H'3 12 0-39 0-22 = 0-37 2 27 301 28-8 13 0-05 4- 0-44 = o'l i 603 16 289 4- 1 6-0 I I 0-35 0-15 = + 0'26 7 Apr. 4 174 4- 18-3 I I + 0-22 +0-31 = 0-37 6 20 2 33 + 17-4 I I 0-36 o'oo = 0-39 320 3 186 4- 20-9 1 1 4- 0-29 + 0-24 = 4- 0-72 7 2 ' 221 + 10-9 I 2 0-42 0-07 0-29 May 8 89 4- 26-0 ! 13 + 0-41 + 0-18 = + 0-19 614 Dec. 4 60 - 19-4 13 0-44 0-08 = -f- 0-14 6 3 158 4- 14-2 12 + 0-42 4- 0-05 = 4- 0-30 9 6 26 + 24-7 I I 0-46 -f- 0-09 = 0-46 332 June 23 200 - 21-8 12 + 0-41 0-14 =+1-50 627 17 247 + 27-5 13 0-44 4-0-13 - 0-48 3 July 3 69 -36-9 II + 0-28 0-18 = 0-29 8 '7 2 3 8 + 16-4 I I 0-37 4- 0-06 = 4- 0-09 342 Aug. 7 ; 323 4-II-9 12 + 0-18 0-42 = + 0-05 3 H : 235 4- 24-6 13 + 0-14 0-44 = o"o8 1882. o 4 14 : 226 1 6-6 12 + 0-17 0-41 = 0-43 650 Jan. 1 8 188 + 15-4 I I 0-243; 4- 0-28^ = 4- 0-28 5 15 2 '3 + 2i'5 13 + 0-21 0-40 = + 0-33 3 2 4 98 - 17-4 I I 0-24 4- ' 2 7 = Q 'OS 6 15 2I 4 ig-O 12 4- O-2I O'33 = O-O7 8 3 19 -p 16-1 12 0-23 4- 0-38 = 0-30 35" Sept. 3 327 4- I0'2 12 4- 0-04 0'44 = 0-22 664 Feb. 7 286 - 137 I I 0-18 4-0-40 = 0-12 5 9 2 39 - 17-8 II o-io 0-37 = 0-16 8 10 236 + 8-0 I I 0-16 4- Q'37 = 4- o-i i 9 13 190 4-22-1 12 4- 0-03 0-42 = 4- o-oi 670 '5 172 + 10-7 I I 0-13 4-0-39 = 0-08 368 2 9 34 1 - I7-9 12 0-25 0-37 = 0-32 2 17 137 - 18-8 '3 0-02 4- 0-47 = 4- o-oi 37& 3 324 4- 16-4 II 0-24 0-30 = 0-41 7 2 IO2 - 17-8 1 1 o-io 4- 0-32 = 0-44 380 Oct. 1 8 9 2 4- 23-9 12 0-25 0-33 = 0-36 8 2 I 97 2O'O ii 0-12 4- 0-32 = 0-82 I 20 63 4-21-2 12 0-27 0-34 = + 0-03 687 Mar. 5 294 - 12-9 13 o-oo -f 0-46 = 0-51 2A 2 5 359 21-0 II 0-19 0-31 = 4- 1-14 691 H 222 - '5 12 4- 0-02 4- 0-47 = 4- 0-22 39 2 Nov. 1 7 56 4-2I-9 II 0-36 0-03 = 0-36 702 22 75 22'I H 4-0-13 4-0-51 =4-0-24 7 2 9 254 4- 20-7 I I 0-36 0-04 = 4- 0-07 5 2 7 3 - IO- 3 12 4- o-i i 4-0-43 = 0-20 400 Dec. 8 '35 -i3'9 II 0-39 o-oi = + 0-13 718 Apr. 7 224 + I' 2 13 4- 0-30 4 0-33 = - 0-04 3 2 7 250 4- 20-6 12 0-41 +0-09 = 0-31 722 ii 161 + 20-8 12 4- 0-23 4- 0-36 - 0-22 6 3i 190 - 3>'i II 0-27 -f- O'22 = + 0'75 9 19 65 -28-5 !3 4- 0-33 4- 0-29 = + 0-24 734 22 2 3 + ii'3 12 4-0-31 4- 0-33 = - 0-03 5 23 7 - 107 12 4- 0-29 4- 0-33 = - 0-50 1881. o 744 May 7 177 + 23-1 13 4- 0-37 4- 0-25 = 0-12 407 Jan. 8 91 + 25-3 12 0-302 + Q-i6y = o-io 9 9 156 + 20-9 12 4-0-34 4-0-25 =-0-37 4'5 Feb. 6 72 4- 19-0 12 -0-25 +0-38 =-0-33 75* 1 Hi - 4'5 II 4- 0-37 4- 0-22 = 4- 0-02 9 ' 2 354 + i5'9 12 0-17 +0-39 = 4-0-18 4 i 2 no + 137 I I 4-0-35 4-0-20 ='4-o-02 423 20 245 4- 20-1 13 0-08 +0-44 = 0-17 9 17 5 2 - 29-2 H 4-0-46 4- '6 =4-o-ii 4 20 240 20-3 H o-i i 4- 0-52 = + 0-14 762 2 16 - I5-3 13 4-0-45 4-0-04 = 0-25 43' Mar. 1 4 312 21-0 12 4- O-Ol +0-48 = 4- O'2O 5 3i 230 + H'3 '3 4- 0-46 o-oo = 4- 0-30 6 17 267 -16-3 12 + 0-14 + 0-47 = 4- 0-07 7 June 4 168 4- 21-2 12 + 0-40 4- o"o8 = 0-13 45" Apr. 9 336 -f 22'2 I I + 0-17 4- 0-28 = 0-09 777 >4 38 - I2'5 12 4- 0-45 o-i i =4- 0-52 3 H 271 14-6 13 + 0-23 + O'39 = O'OI 780 19 33 2 + 22-2 II 4- 0-32 0-05 = 0-67 461 2 3 150 + 7'4 I I + 0-34 +0-23 =-0-37 5 2 9 197 + I0'3 I I 4- O'33 O'2O = 0-31 472 May 1 6 206 + i3'9 I I + 0-37 +0-12 =+0-24 797 July 19 293 + HH 12 4- 0-30 0-33 = 0-70 485 June 2 34i 9-7 n + 0-36 0-08 = 4- 0-64 808 Aug. i 123 - II'7 I I 4- 0-25 0-35 = 4- 0-22 7 5 288 4- 22-3 12 + 0-38 0-04 = 4- 1-30 812 15 297 + i5'3 12 4- 0-19 0-37 = 0-16 496 ,, 2 ' 84 - 26-8 n 4- 0-36 - O2 = 0-40 6 23 190 + IS' 2 12 4- 0-06 0-45 = 0-21 501 3 33i 4-267 13 + 0-44 -0-14 = + 0-23 821 28 129 i i't 12 4-Q-I2 0-42 =4-0-28 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 33 TABLE VII. continued. No. Date on Stean No. No. Date on Mean No. of Central Group. Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. 1882. o o o 1883. o 827 Sept. 6 3 + 20-5 12 + o-i ix 0-41^ = 4- '5 1144 Oct. 1 8 35 - 9-8 12 0-313: 0-30^ = + 0-40 833 7 353 + 7-6 I I + 0-03 0-38 - O"22 1154 29 254 - 6-4 12 o'35 0-28 - 0-46 8 '9 199 + 11-4 12 0-03 0-46 - 0-34 6 3' 224 - 9-8 12 - 0-30 0-33 = 4- 0-40 846 3 5 - 217 12 o'lg 0-35 = + o'o8 1 161 Nov. 3 '85 + 3 '2 I I 0-30 0-24 = o-i 8 7 Oct. i 4i + i9'4 I I 0-06 0-33 = 4- o-io 9 8 119 - 23-3 12 -0-33 -0-28 =-0-33 8 i 35 28-9 13 0-16 0-42 = o-io 1 172 13 48 - H'9 II -0-33 -0-07 =4-0-31 9 i 32 + 7'2 I I 0-22 0-28 - 075 3 H 35 - 8-8 12 -0-37 -0-18 =-0-35 856 I* 203 + 12-5 13 0-29 0-39 = o-i2 7 19 33 2 - 137 13 0-43 0-17 - 0-06 7 !9 164 + 18-6 12 0-28 0-40 - 0'29 1187 27 226 10-9 II 0-36 0-06 . = 4- o-oi 868 28 43 - 22'4 '3 c - 33 0-29 - 0-19 8 28 217 - 10-5 13 0-45 0-07 =4-0-31 870 Nov. 2 233 + 1 6-0 13 0-40 0-27 = 0*09 1197 Dec. 1 1 47 - i3 - 2 12 0-45 + o-io = + o-io 6 9 237 - i9'3 '3 -0-45 -o-ii -0-47 8 12 34 - 97 13 0-45 + 0-09 =4-0-01 7 II 217 - 23-4 12 0-42 O'I2 = O-04 1202 '4 i 4- 12-5 12 0-47 4-Q'io = 0-12 885 18 in + i9'2 12 0-43 O'l I = 4- O'22 5 17 33i 4- 2I-I '3 0-43 -|-o-ii =0-02 9 21 83 4- 10-8 12 0-44 o-io = + 0-31 1212 25 228 - 8-8 1 1 - 0-37 4- 0-05 = + 0-17 890 25 36 - 22-9 13 0-43 0-04 = o-io 7 27 200 4- i'9 13 0-44 +0-19 =4- o-ii 8 27 I 94 - 16-6 '3 0-46 4-0-13 =4- o-ii 1883. o o 920 Jan. i 270 - I4-3 3 0-41^ 4- O'22y =-+-0-15 1884. 7 5 214 - 17-9 13 0-40 4- O'22 O'47 1231 Jan. 7 47 - 13-0 12 - 0-393; 4-0-27^ = - 1-27 93 6 194 + 5'o 1 1 0-36 +0-I5 = 0'08 2 8 37 4- 10-9 '3 0-42 4- 0-24 - 0-26 3 >5 76 - 9'i 12 0'33 -j- 0-29 = + 0-24 7 I' 356 10-9 '3 0-38 + 0-28 = 4- 0-03 4 18 49 + I3-5 12 -0-33 +0-30 =+0-46 1251 19 256 - 18-0 13 - 0-32 + 0-36 = 0-17 941 28 275 - 27-2 '3 0-26 +0-34 = 0-18 5 23 208 - 8-5 12 0-31 4-0-34 =4-0-07 954 Feb. 6 156 + n-3 '3 o - i8 + 0-42 o-oo 6 23 203 + '-3 '3 0-32 4- '36 = 0-07 961 13 5 - 177 '4 0-41 4-0-50 = + 0-67 1260 27 H* 4- 6-3 II 0-16 4- 0-36 = + 0-06 4 16 16 + 7'5 12 o-io 4-0-42 =+0-23 4 Feb. 2 75 4- 10-7 12 -0-23 4- 0-37 =4-0-41 978 Mar 1 6 i? - 12-9 12 + 0-08 +0-43 = 4-0-11 6 4 43 + 8-5 '3 0-22 4-0-42 =4-O-25 981 22 297 - 8-0 12 + 0-10 + 0-44 - 0-39 7 5 27 - 24-5 13 0-24 + 0-39 = 0-04 5 3i 172 - 8-2 12 -f O 4 22 + O'37 = O-OJ 8 5 23 + 13-5 12 0-19 4- 0-39 - 0-31 7 Apr. 3 135 + i3'4 3 4- - 22 + O'43 - 0-20 1271 1 329 + 1 1 -8 12 o-jo 4- 0-42 = 4- 0-07 8 4 124 - 137 II + o-io 4- 0-36 = + 0-03 7 '5 255 + 7'4 I I o-|2 4-0-36 =4-0-25 992 6 90 - 17-0 12 4" O-26 + 0-40 = 4- 0-36 1284 9 208 - 97 13 0-09 + 0-45 = 0-13 9 i7 35 - 22'4 12 + 0-30 + 0-33 = 0-05 8 21 177 + I3-5 12 0-06 + 0-48 = + 0-14 1OOO 18 34 1 6-0 12 + 0-30 + 0-35 - 0-49 1301 Mar. 2 4i + 10-4 12 0-09 + 0-43 = 4- 0-14 I '9 282 - 16-1 12 -f 0-27 4- 0-39 = - 0-42 2 i) 55 - 8-7 I I 4- 0-06 4- 0-37 = 4- 0-27 8 28 173 + 77 12 + 0-33 4- 0-28 - 0-20 3 4 20 26-7 '3 o-oo 4- 0-46 =4-o'i2 1021 May i o 10 - 18-2 I I + 0'27 4- 0-25 - OM7 1310 12 268 - 167 13 4- 0-04 4- 0-49 = 4- 0-24 7 15 301 - 22-3 13 + 0-44 +OM4 - 0-29 4 15 233 + H'5 ii 0-02 4- 0-34 = 4- 0-16 8 16 292 + II'O 12 + 0-42 4- 0-16 = + 0-20 1320 17 208 - 97 13 4- 0-12 4- 0-45 = 4- 0-22 1039 June 5 16 4- 14-5 13 + o-45 + '5 = + '3 2 3 18 189 + I3-5 ii 4-0-13 4-0-33 -0-48 1046 12 294 - 23'2 12 + 0-43 O'Ol = O-22 4 19 1 80 + 7'5 12 4-0-16 4- 0-40 = 0-25 1054 23 144 - I 5 -8 12 + 0-43 0-06 = 4- 0-62 133 24 122 - 87 12 4-0-13 4-0-43 =4-0-34 8 28 75 - 97 1 I 4- 0-35 o-ii - 0-27 6 28 69 I l'2 I I 4-0-10 4-0-36 = 0-16 1062 July i 36 + io'5 13 + 0-45 0-17 - 0-45 1342 Apr. 4 333 - 9' 12 4- 0-22 4- 0-40 = 4- 0-28 6 9 290 - 22-6 I I + 0-33 -0-14 = 0-49 7 8 285 11-6 13 4-0-31 4- 0-35 - 0-12 7 15 212 26-0 13 + 0-37 0-26 0-04 135 9 268 - 17-1 13 4-0-31 4-0-35 =-'39 8 H 224 - 9'8 I I + 0-28 0-32 = + 0-24 i 9 267 - 12-9 '3 4-0-31 4-0-35 ^-0-15 1074 21 '33 - 15-2 13 4- 0-36 0-34 = 0-25 1360 '9 129 - 9 -I 1 1 4-0'l6 4-0-34 =0'02 1080 25 74 - 9'5 13 + 0-34 0-30 = 0-62 3 20 118 - 9'5 12 4- 0-37 4- 0-29 = 0-02 1094 Aug. 14 178 - 10-3 13 + 0-16 0-44 - o-i i 9 25 57 - 14-0 13 4- 0-40 4- 0-28 =4-0-15 8 21 89 16-4 12 + O'I3 0-42 = + 0'20 1371 2 7 25 io - 6 12 4-0-27 4-'35 =4-0-82 1 103 26 16 - 15-2 12 + 0-18 0-42 =+0-39 3 May i 334 - 15-2 12 4 0-43 4- 0-19 - 0-18 9 Sept. 4 254 19-0 12 O-QO 0-42 = 4- o'io 1381 15 '53 - 7'5 13 4- 0-44 4- 0-12 = 4- 0-20 I I 1C 7 219 + I I O 12 + 0-06 0-45 = 0-17 8 21 75 2'4 '3 4- 0-48 4- 0-08 = 0-12 4 13 133 - 21-8 '3 o'i i 0-43 = 4- 0-05 9 22 62 - '3 - 9 12 h 0-42 + o-i i =4- 0-36 9 18 75 + 10-8 12 0-06 o'43 = 4- 0-02 '393 24 29 - 9'3 '3 h 0-46 4- 0-09 =4- o-io 1 126 Oct. 2 249 - 187 13 O'2O 0-40 = 4- O'O3 4 28 337 4- 18-1 1 1 h 0-31 4- 0-16 =4-0-21 1130 8 177 - 6-7 13 0-25 0-40 = + 0-17 5 28 334 - '5'3 13 h 0-45 4-0-10 =4-0-53 2 1 H5 - 57 I I o-zi 0-31 = o-oi 6 29 330 - 11-3 12 h 0-43 4- 0-05 - 0-23 3 ii 129 - 22-4 13 0-33 0-40 = o-oi 1404 June 5 232 - 15-8 12 h O'43 O'O6 = 0-22 4 12 i'4 + 10-9 12 O'2O 0-46 = -f- 0-09 5 6 223 - 16-2 12 h 0-46 4- 0-02 - 0-42 6 12 124 - 1 6-2 I I 0-23 0-32 = o-oi 9 ii 152 - 6-6 I I - o"37 0-06 = 0-19 POSITION OE SUN'S Axis. 34 POSITION OF THE SUN'S Axis, TABLE VII. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. 1884. o o o 1885. o o 1 o 1414 June 20 31 - 8-2 12 4- 0-433; o - o8?/ = 0-23 1718 July 14 292 8-5 12 4- 0-343; - 0-32^ = 0-31 1421 July 3 222 + I3-5 12 + 0-33 - 0-27 = + 0-44 1720 '8 247 4- 9 -I ! 3 + 0-33 0-34 = 4- 0-40 7 '3 87 + ii'S 12 4- 0-38 o - 34 = 4- O'oi 2 2 215 6'2 12 4-0-34 0-25 =4-0-24 1441 3' 215 + 3'5 1 1 4- 0-23 0-32 = + 0-40 8 23 175 - II- 4 13 4- 0-34 0-31 = 4- 0-50 H53 Aug. 14 28 - 5'9 13 4-0-15 0-44 = o - 2i 1732 2 9 99 : 12-6 ii 4- 0-25 - 0-34 i - 0-39 5 '9 323 - 3'2 12 + 0-13 -0-41 =-0-37 3 Aug. 2 49 21-5 12 4- 0-27 0-30 = 4- 0-55 1480 Sept. 1 1 15 4- H'o 12 0-04 O'47 = 4- O'2O / 10 298 I I'2 12 4- 0-15 0-41 =4- ro6 2 H 337 + 5'5 13 0-08 0-49 0-51 8 n 288 -11*4 13 4- 0-19 0-45 = 0-09 4 18 287 + 4-6 12 0-09 0-45 = 0*04 1742 H 252 4-127 12 4- 0-16 0-43 = 0-61 5 20 259 + i3'3 I I 0-09 0-38 = 0-91 5 15 228 4-6-6 ii 4- 0-17 0-34 = 0-09 6 22 225 + 157 12 0-03 0-42 = 4- 0-23 8 20 i73 - i3'9 I2 4- 0-14 0^40 = 4- 0-07 >495 2 9 134 - I3-5 13 o'i6 0-44 = o-oo 1754 28 57 IO'I 12 4- 0-02 0-44 = 4- 0-80 8 Oct. 2 9 8 - 137 I I 0-19 0-36 = 0-36 6 3' 18 4-8 i II 0^04 0^42 = 4- o'23 1501 8 '5 + H' 2 12 0-26 0-34 = + 0-O2 7 Sept. 3 341 4- 10-5 13 4- 0-03 0-47 = 0-08 1520 28 I2O - H'4 12 0-34 0-29 = 4- 0-66 9 7 293 I2'4 12 4- O'O2 0-42 = O"O2 6 Nov. 2 5' + 10-7 II 0-29 0-23 = 4- 0-30 1763 H 203 13-6 12 0-02 0-44 = 0-52 1542 22 142 - 7'3 I I - 0-37 - 0-05 = - 0-33 7 27 28 ' 2-6 13 0-17 0-41 = 0-57 6 Dec. 4 35 + 37 12 0-48 0-03 = 4- o'47 8 27 23 + 7'5 '3 -0-13 -0-43 =-0-25 9 n 259 + 4' 8 I I 0-35 0-06 = + o - i2 1770 3 345 4- 12-0 1 1 o-i i o'35 = 0-13 1556 '9 145 - 7' 12 0-43 4- 0-13 = 0-08 3 Oct. 6 261 - 16-8 12 o'2O 0-38 = o - i8 8 23 102 - i3'z II 0-35 +0-23 = 0-17 9 23 43 + 7'2 12 0-27 0-40 = 0-26 1561 2 6 57 + 87 12 -0-40 4- 0-16 4-0-32 1783 26 4 - 3'9 J 3 - '39 - 3 J = + '7 3 3' 356 + 1-6 12 0-42 4- 0-16 = + o'o8 4 27 356 - 15-4 I I 0-32 0-16 = 4- 0-43 6 3i 304 - 9-2 I I 0-24 0-26 = 0-06 1885. o o o 8 Nov. 3 261 - 15-1 '3 0-36 0-24 = 0-49 1572 Jan. 2 1 80 2I'O I I 0-263; + o'2-jy = + 0-28 1793 16 9 + 13-9 12 - 0-44 o'i6 = 0-30 1580 3i 302 -13-6 13 0-28 4- 0-40 = 4- 0-37 5 '9 54 4- 14-8 12 0-41 0-15 =4- 0-29 6 Feb. 4 H7 + 1-6 12 0-20 + 0-41 = O'o8 1806 Dec. 1 6 53 + 15-2 12 0-42 4- 0-05 = O'2O 1592 '4 116 - 6-0 13 o'i8 4- 0-42 = 4- 0-36 1813 26 288 4- 17-1 12 0-43 4-0-15 =0-19 3 16 92 + 3'7 13 4- 0-16 + 0-46 = + 0-26 4 !? 88 - 21-5 12 0-12 4-0-44 = + 0-34 1886. o o o 6 '7 78 + 8-5 12 0-09 + 0-47 = 0-27 1821 Jan. 8 105 - 13-9 H 0-463; 4- o-zgy =4-0-33 1612 Mar. 4 246 - 3'5 12 o'oi +0-46 =+0-19 1833 Feb. 4 108 - 14-9 '3 0-14 -j- 0-47 = 4- 0-25 4 5 232 - i7'9 12 O-02 4- 0-45 = I'll 5 i 35 - 9'S '3 0-19 + 0-42 = 0-09 8 10 1 60 - I5'3 13 -4- 0-04 + 0-48 = 0-07 1847 Mar. 6 83 - 17-2 12 o-oi 4- 0-46 = 4- 0-29 1622 '6 86 + 5'2 13 + o'i2 4- o - 47 = 0-27 1851 9 4 1 - 27 12 4- O-QI 4- 0-46 = + 0-06 1631 Apr. i 237 - 19-9 13 + 0-15 +0-43 =+0-09 2 9 36 - 8-7 13 4- 0-03 + 0-46 = 0-38 2 1 237 - 16-1 12 + o'2i 4- 0-45 = 0-28 3 10 23 - 5 -I 3 4- 0-03 4- 0-46 = 4- 0-29 6 7 159 - 137 II + 0-14 4- 0-30 = + 0-34 6 24 200 + 5'4 13 4- 0-16 4- 0-45 - 0-05 8 i 122 + 12-3 1 I + 0-13 +0-36 = o'li 9 29 136 - i'3 13 4- 0-19 4- 0-43 - 0-26 9 '2 84 + 7-5 12 4- 0-32 4- 0-36 = + O'2O 1860 3 116 - 16-8 I I + 0-22 + 0-33 = 4- 0-24 1643 21 322 - 4'5 12 + 0-34 + 0-30 = + 0-08 i Apr. 4 56 - 1 1-8 12 4-0-17 4-0-41 = o'io 5 2 5 272 1 6-0 13 + 0-33 +0-33 = + 0-04 4 6 27 - 5'4 13 4-0-23 4-0-44 =4-o-ii 7 27 243 16-4 13 + 0-35 +0-33 =-0-03 9 20 202 + 4'3 12 4- 0-36 4- 0-29 = 4- 0-07 1653 May 3 171 IO'I 13 4- 0-43 + o-2i = 4- 0-58 1872 25 139 - i '4 '3 4- 0-40 4- 0-26 = 4- 0-45 8 6 133 + 1 1 -8 12 4- 0-38 4- 0-24 = 4- 0-26 4 26 118 - 18-3 H 4-0-43 4-0-32 =4-0-34 1661 7 II 9 + I4- 6 12 + 0*36 4- 0-23 = 4- 0-30 6 May 3 32 - 6-5 13 4-0-40 4-0-2; =4-0-12 2 9 9i + 4'3 12 + 0-37 +0-23 = 4-0-37 1880 8 331 4- 8-6 12 4-0-40 4-0-26 =4-0-14 3 i 75 + 14-6 13 + 0-41 4- 0-20 = + 0-23 4 27 74 io"6 '3 4- 0-47 4- o'o6 = 4- 0-08 4 ii 60 - 8-1 I I + 0-34 +0-17 = 0-24 1896 June 22 98 15-0 1 1 + 0-35 - 0-05 = 0-32 1670 20 301 + I3' 1 I I + 0*42 o'oi = o'44 7 23 74 - H7 12 4- 0-44 0-05 = 0-28 i 2 4 255 - iz'5 13 + 0-45 -(- 0-08 = + 0-14 1901 July 3 302 - 15-3 13 4- 0-42 0-17 =4- 0-64 2 2 4 254 + i3'9 13 4- 0-45 + O'o8 = 4- 0-05 3 4 289 2O'0 I I 4- 0-30 0-14 = 4- 0-60 7 25 236 + 97 12 + 0-42 4- 0-05 = 0-38 6 21 73 - 9'4 12 4- 0-34 0-31 = 0-28 8 26 227 - 17-1 '3 4-0-45 4-0-09 = 4-0-19 8 26 357 - 3'i I I 4-0-27 0-25 =4-0-28 1687 June 3 117 - 12-6 1 1 4- 0-37 o p o6 = 0-09 1910 | 30 301 - I3-3 12 4- 0-25 0-36 o'oo 1690 7 62 io - 6 13 4-0-46 4- 0-06 = 4-0-16 2 31 300 4- 1 6-8 I 1 4.0-17 -0-33 =4-0-29 4 12 357 - H'5 12 4- 0-43 0-09 - 0-25 3 Aug. 6 215 - 5'3 1 4- 0-08 0-38 = 0-08 1702 19 261 4- 87 12 4-0-43 -0-13 =4-0-46 1920 Sept. 4 189 i 4- 12-4 2 o'oo 0-49 = 0-26 6 21 241 + 10-5 13 4- 0-46 o-i i = 0-59 3 15 44 4- 12-8 3 0*04 0-46 = 4- 0-03 1714 July 5 56 - 10-8 13 4- 0-40 o'2i - 0-28 1930 Oct. 5 '47 - I5-5 i 0-24 0-30 = 4- '28 5 5 53 18-9 I I 4- 0-26 0-24 = 0-42 1941 Dec. 1 5 290 4- 18-5 i 0-36 + 0-04 = 0-67 6 ,, Jo 354 - IS' 1 12 4- 0-37 0-22 =4- 0-17 4 28 i ii - 8-3 2 0-42 4- -I 6 = o - i6 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 35 TABLE VII. continued. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1887. o o 1891. o o o 1946 Jan. 3 J8 -i6-s 12 - 0-402: 4- o'ljy = + '7 2252 July 7 277 + 19' 12 + 0-41* 0-19^ = 0-07 9 3 43 - 3'4 12 - 0-31 4- 0-32 = 4-0-14 5 H 1 80 + 15-7 >3 + 0-39 - 0-34 = - 0-32 I 95 8 Feb. 24 7' + I I'2 12 0^04 -J- 0-46 = 0-96 6 '4 173 + 24-8 1 1 4- 0-28 0-27 = 4- 073 1973 May 8 191 + 127 13 + 0-43 + 0-20 = 0-36 8 18 130 + 20'0 13 -f 0-33 - 0-34 - 0-35 1987 June ii 95 - 8-5 13 + 0-44 0-14 = o'i4 9 "9 113 + 21-3 13 + 0-35 0-27 = 0-66 1991 July 2 179 1 1 "6 12 + 0-39 0-24 = + 0-07 2275 Aug. 9 191 ~ 17-9 13 -f. 0*25 0-40 = 0-62 ^ 8 97 ~ 7'3 '3 + 0-43 0'20 = O'lO 7 1 182 + i7' 13 -4- 0-20 0-40 = 0-82 4 '2 54 + 7'3 12 + 0-37 0-26 - 0-30 8 10 177 + 24-3 13 + 0-23 0-38 = 0-50 8 Aug. $ 98 - 7'5 I I + 0-23 O"26 = O'I2 2293 Sept. 3 221 + 21-8 13 0-07 0-45 = 0-31 9 5 89 - 4'9 I I + 0'22 0'32 - O'O6 4 6 177 + 25-5 13 - 0-07 - 0-47 = - 0-43 2017 Nov. ii 237 - 8-0 12 0-36 0-25 = 4- o-oi 7 9 I 4 8 + 28-6 14 + 0-02 0-51 = 0-35 202 1 Dec. 9 224 - T6 13 0-46 0-05 = 0-56 8 9 H7 + 127 12 + 0-02 0-46 =0-I3 4 zo ll - 8-0 '3 - 0-47 + 0-05 = + 0-03 9 16 52 + 14-6 13 0-03 0-46 = 0-46 2310 Oct. 4 174 - 25-4 13 o"2o 0-31 = 0-16 1888. o o i >! 4 171 + 26-7 13 0-16 0-41 = 0-45 2026 Jan. 5 228 - 8-0 1 1 0-323: + 0-I3J/ = - 0-21 3 6 144 + ] 9'4 12 O'22 0-38 = 4- 0-23 9 16 85 - 87 12 0-39 + 0'20 = 4- 0'54 5 8 126 - i4'9 12 0-22 0-39 = 4- o - i6 2035 Feb. 24 297 - 47 12 0-14 -f- 044 =002 8 13 54 + H' 2 13 0-26 0-41 = 0-08 7 Mar. 14 40 + 2-6 12 + 0-09 4- 0-45 = o-i i 2328 28 218 + 1 8-0 12 0-29 0-34 = I'll 2052 May 17 274 - 7'8 '3 + 0-42 4- 0-22 = + 0-32 2349 Nov. 21 261 - i9'3 13 0-44 0*17 + '4 2 2066 Sept. 3 277 6-1 '3 + 0-05 0-47 = 0-28 235 24 229 + i9'3 12 0-46 o"i i = + 0-62 2070 12 164 - J 4'9 II + 0-03 -0-37 = + 0-33 2364 Dec 1 8 268 - 19-9 13 0-46 4- O'I2 =-)-0-I2 4 Nov. i o 96 -4- I0'2 I I - 0-33 o-ii - 0-15 5 17 284 - 19-1 II - 0-32 + 0-19 = + 0-49 5 16 16 - 4-0 12 0-44 0-15 = 4-0-16 9 ,. 24 9S + 28-6 II - 0-33 4- 0-14 =- 0-17 6 Dec. 2 163 - 1 1-8 I I 0-40 + 0-05 = + 0-34 1889. o 1892. o o 2083 Mar. i o 317 - 7'4 I I + 0-04? 4- o-^oy = 0-41 2376 Jan. 4 39 + 2I-I '3 0-403- 4- o-2Oy = 0-13 6 Apr. 7 3'5 + 5'3 I I + 0-17 4- 0-29 = o-ii 2384 6 23 l6'4 13 0-38 -1-0-25 =4-0-41 2090 June 22 3' - 5'5 13 + 0-45 - 0'20 = 4- 0-34 2395 .. '9 209 - 18-2 1 1 0-34 4- 0-18 =4-0-87 2 July 1 8 36 - 7'9 '3 + 0-38 0-26 = 4 0-17 7 20 189 - H'3 13 0-36 4- 0-32 = 4- 0-36 9 Aug. 14 37 - 8-1 I 2 + 0-17 - 0-42 = + 0-36 9 21 184 + 28-0 '3 0-28 4-0-38 =4-0-15 2100 Sept. i 1 60 - '9'4 12 4- 0-03 0-42 = + o-io 2400 21 181 + 13-9 i 13 0-30 4- 0-38 = 0-04 3 29 153 2O'9 I I OMO - 0-35 = + 0-31 5 23 149 + 18-6 12 0-25 + 0-36 = 4- 0-07 21 IO Dec. 25 100 -26-5 '3 0-44 + 0-04 = 4- 0-03 8 28 84 - i5'3 13 0-31 + 0-34 = + 0-07 2416 Feb. 5 338 + 227 ; ii 0-19 + 0-30 =0-83 1890. o o 2421 12 256 28-3 12 0-16 + 0-41 =4-0-01 21 I I Jan. 2 344 - 9'3 12 0-422 + o-ijy = + 0-05 8 18 173 + 14-2 ii 0-08 + 0-38 = o-oi 7 Mar. 9 190 + 32'9 I I o-oi + 0-33 = 4- 0-25 9 '9 158 + 16-1 13 0-12 4- '45 =0-46 2135 July 28 129 - 6-4 I I + 0-29 0-19 = 4- 0-07 2431 20 H5 + I9'4 12 0-04 + '4 Z = '8 2141 Aug. 3 1 4i + ZI'I '3 + 0-10 - 0-47 - 0-43 2440 Mar. i o 250 -28-4 '4 h 0-09 + 0-54 = + 0-24 2156 Oct. 26 28 - 23-3 H -0-36 -0-34 =+0-54 s >, 21 106 + 9'5 12 1-0-15 + 0-40 =0-39 9 NOT. 28 3'2 + i9'9 '3 0-46 0-06 = 0-60 2451 23 85 - 15-9 13 h 0-13 4- 0-45 = 0-06 4 27 32 + 277 13 |- 0-17 + 0-39 = 0-18 2466 Apr. 6 264 I2'Z 12 |- 0-24 4- '38 = o - o2 1891. o o o 2481 '7 107 + II'4 13 h 0-28 + 0-38 = 4- o-oi 2169 Jan. 21 310 26-9 H 0-383: -4- '4y = 0-02 6 .. 23 28 + lO'S 12 h 0-37 + 0-32 = - 0-19 2186 Feb. 26 209 + 24-4 1 1 0-06 4- 0-28 = 0-05 2492 2 9 3i4 - 18-1 13 |- 0-36 + 0-26 = 4- o'i i 2193 Mar. 1 9 285 + 19-6 '3 4- 0-09 4- 0-46 = + 0-18 6 May 4 253 -24-5 H + 0-44 + 0-26 = + 0-56 5 Apr. 4 74 + 19-6 '3 + 0-21 + 0-40 = 0-47 8 6 215 I2'5 12 4 0-42 + 0-2 1 =4- 0-17 2204. 27 136 - ig'S 12 + 0-34 +0-30 = + 0-38 2507 ' 167 + I8'9 12 4-0-40 +''3 =0-23 221 I May i o 3i5 - 247 13 + 0-40 4- 0-26 = 4- 0-53 2515 16 84 - 14-0 13 4- 0-41 + 0-20 = 4- 0-33 6 18 218 + 16-3 II + 0-32 +0-17 = + 0-13 9 '9 49 4- I0'0 12 4- 0-43 + 0-07 = o - 6o 7 18 209 - 207 12 + 0-37 +0-19 =+0-04 2524 24 342 + i5'6 13 4-0-46 4-0-09 = 0-31 9 ,, 22 159 4- l6'2 12 + 0-45 + 0-06 = 078 2534 3<> 267 - i9' 2 12 4- 0-43 + 0-06 = - 0-32 2220 24 136 - '9'4 12 +0-42 +0-12 =+0-38 2543 June 4 200 + 97 13 4- 0-48 - 0-03 = 4- 0-02 I 2 5 125 + 20-2 II 4- 0-42 + 0-09 = + 0-36 2550 '2 86 + 87 12 4- 0-46 0-09 = 4- 0-40 4 3 55 - 16-8 12 + 0-45 + 0'08 = 0-20 9 16 35 + 25-1 12 4- 0-35 - 0-22 - 0-08 2231 June 7 3 ^o + 23-0 11 + '39 +0-13 = - 0-52 2561 18 5 - "-5 I I 4 0-33 0-09 = 0-71 6 18 168 + 14-2 ii + 0-34 o'i2 = 0-15 2 "9 355 + in 13 + 0-46 o-ii =4- 0-31 7 20 139 + 1 8-2 '3 -f-0-46 0-13 =-0-35 4 21 337 + 20-7 I I 4- 0-34 0-14 - 0-23 2242 26 62 + H' 2 12 + 0-42 0-15 = 4- o-io 5 2 3 298 4- 1 1 -8 12 4- 0-44 0-16 = 4- 0-07 4 27 43 + 16-1 13 + 0-43 0-18 = -f 0-29 7 25 285 + n-s II 4- 0-35 - 0-05 - o-oi 36 POSITION OF THE SUN'S Axis, TABLE VII. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Equation. Days. 1892. o o 1893. o o D 2578 July 5 149 + '4 - 4 II 4- 0-322: o-2dy = 0-03 2881 Mar. 1 6 4 2 - 8-2 12 4- o'ojx 4- '45.'/ := + ' 10 2580 9 98 - 22-9 12 4- 0'35 - 0'2 I = 0'2I 9 23 304 + 13-8 I I 4- 0-05 4- 0-36 = 4- 0-28 I 10 83 -t- ii-o 13 4- 0-38 0-29 = 4- o'o i 2892 24 292 + 97 13 4-0-12 4- 0-45 4- 0-94 3 H 33 - 3i'3 13 + 0-39 0-18 = 4- o-oi 3 ,, 2 5 275 + 237 13 4- 0-13 4- 0-4; = - 0-40 4 '4 26 + 28-0 13 4- 0-29 0-33 = 4- 0-26 9 M 3 214 2O-O 12 4- 0-28 4- 0-34 ---= 0-40 6 20 302 - 9'4 12 4- 0-30 0-32 = + 0'02 2906 Apr. i 182 - H'4 12 4- 0-23 4- 0-40 : 0-25 2598 3 175 + I3-3 12 4-0-26 0-37 = o'i2 2914 12 45 - 8-5 H 4-0-30 4-0-45 =4-0-27 9 3' 161 + IS' 2 13 + 0-31 -0-35 = -o-n 2923 17 332 - H'7 12 + 0-32 4-0-31 =-0-54 2600 Aug. i 158 - i?'9 12 4- 0-28 0-34 = 4- 0-23 S 18 3H + I4-9 12 4-0-31 4-0-33 =-0-67 i I 'S3 + i i-o I I 4- 0-28 0-22 = o'33 2931 23 259 4- 2 I'O I I 4- 0-29 4- o'z' = i'i i 2 2 H3 + 11-3 13 4- 0-36 0-33 = 0-16 8 27 205 4- 8-6 II 4- 0-34 -f- O'2O = 4- O'I2 26ll 5 94 + 9' 8 13 4- 0-27 0-39 = 4- o'30 9 - 28 190 - H'4 12 4- 0-33 4- 0-25 - 0-30 2 5 9i 22'O 12 4- O'2I 0-38 = 4- O'I2 2948 May 2 137 - 12-3 I 2 + 0-41 4- 0-20 = -i- 0-41 5 ii 17 - 30-4 12 + 0-23 0-32 = 4-0-13 2951 ,, 5 94 - I9'4 13 f- 0-42 4- 0-24 = 4- 0-27 7 12 12 - 8-5 I I 4- 0-20 o'3o = 0-09 6 H 5 2 - 27-1 12 4- 0-43 4- 0-17 = 0-83 2622 16 3H 4- i o-o 13 4- 0-16 - 0-45 o-oo 8 8 5i 14-6 II 4-0-32 + 0*19 - 0-15 3 17 33 - 7-0 12 4- 0-18 0-40 = o-ii 2962 12 357 - 13-3 12 4-0-42 4-0-15 =4-0-43 6 18 282 -18-3 12 4- o-ii 0-41 = 0-04 7 16 3U - 12-9 I I 4- 0-38 0-05 =4-0-71 7 20 26l + 22-2 12 + 0-15 0-44 = 0-28 2977 25 187 + 12-5 12 4-0-45 4-0-04 =4-0-33 2636 26 174 + I2'8 13 0-06 0-48 = 0-59 2982 28 156 4- 23-7 I I 4-0-35 -fO'o6 =4-0'I2 2643 Sept. i 93 + I0'4 H 4- o'O4 0-54 = 4- 0-08 2992 June 2 9i 20-8 H 4- 0-54 4- 0-05 = + 0-34 4 ,, 2 82 - 22-8 13 4- 0-06 - 0-43 = 0-03 3 3 77 2 I-O 13 4- 0-48 4- 0-07 > 4- 0-40 8 6 40 19-6 I I o-oi 0-36 = 0-26 6 5 42 4- 177 12 4- 0-44 0-04 = o-oi 2 6 53 12 308 + II'9 12 0-06 0-50 = 0-24 3004 ii 326 4-13-2 13 4- 0-45 0-07 = 0-17 2672 23 167 - H^ 13 o-io 0-46 = 0-35 5 ii 322 - 12-5 13 + 0-47 0-04 - 0-18 3 24 154 + I3-I 12 o'oi 0-49 = 0-57 3042 July 5 7 - 18-1 13 4- 0-42 0-17 = 0-17 5 2 9 92 4- 10-6 13 0-20 0-41 = 074 6 9 321 16-2 12 4- 0-35 0-22 =4-0-11 9 3 76 - 23-4 I I O'2O 0-30 = O'H 7 8 322 I2'0 12 4- 0-35 0-24 = 0-04 2680 Oct. 2 46 - 21-4 12 o'oS 0-42 = 4- 'i i 3054 ii 284 2O'O 12 4- 0-34 0-24 0-36 i 3 4i + 12-4 13 0-20 0-42 = 4- 'o8 3066 H 250 18-0 II 4- 0-33 o-ii = 4- 0-28 2694 H 255 - 12-3 12 o-io 0-38 = 4- 0-08 7 H 251 4- 16-0 12 4- 0-32 0-29 = 4- 0-35 2703 21 167 + 8-1 13 o'2O 0-43 = 0-58 8 IS 2 34 + 4'5 13 4- 0-41 0-26 = 0-25 2716 Nov. i '9 - 277 1 I 0-32 0'22 = 4- 0-42 3 7i 17 216 -f- 17 -.2 12 4-0-35 0-28 = 0-36 2726 8 288 + 8-2 12 0-40 0-27 = 4-0-16 8 25 109 - 21-5 13 4- 0-26 0-36 0-13 2737 19 142 - 2 4'4 1 0-32 o'i6 = 4-'ii 397 Aug. 5 322 - I7-9 12 4- 0-24 0-36 = 0-53 2745 27 33 2O'6 I I 0-38 O'o8 = o'53 8 5 322 H- 10-3 13 4- 0-20 0-44 = 4- 0-17 7 28 21 - i3'i I I 0-39 0-04 = 0-05 3103 5 313 - I5-3 12 4- 0-22 0-37 = - 0-07 9 29 7 -15-6 12 0-46 o'oo = 4- o'2g 6 7 293 - 17-6 12 4-0-17 0-39 =4-0-23 2757 Dec. 3 39 + I7-5 11 O'36 O'O2 = O'OO 7 ,, 7 295 + 15-6 I I 4- 0-19 0-33 = 0-23 2760 5 291 + 6-6 12 o - 44 0*04 = 4- 0-30 3112 j ,, ii 246 + 16-9 12 + 0-30 0-32 4- 0-06 2 6 278 + 147 1 1 0-39 o'o6 = o - i6 3 ii 241 - 9-6 12 4- 0-24 0-37 -t- 0-28 2770 8 253 22-2 v 1 1 0-35 0-04 =4-0-15 6 12 228 + 16-8 I I 4-0-I4 0'37 = 0-21 7 9 229 - '5'4 12 0-45 4- 0-04 = o-oo 8 13 212 16-4 13 4-0-18 0-41 = + 0-19 8 H 207 + I9'3 1 1 0-36 0-03 = 4- 0-49 3131 20 121 I2'I 12 4- 0-20 0-42 = o'i6 2787 26 6 - 17'4 12 '' 0-39 4- 0-17 = 4-0-28 3 21 I0 5 IO'9 13 4-0-14 -0-45 -0-49 2792 3 320 23-6 13 -0-43 +0-20 = + 0-54 5 21 102 - 18-9 II 4-0-15 0-35 = -4- 0-04 7 22 9 - 9-8 12 4- 0-06 0-44 = 4- 0-56 1893. o o 3H3 25 S 2 + 9'5 13 4- 0-04 0-49 = 0-24 2815 Jan. 1 6 92 + 9'i 13 0-373- 4- '292/ = 4- o-oi 9 28 15 4- 26-4 12 4- 0-03 0-42 = 0-80 9 22 15 - 3'i 12 0-38 4- ' 2 7 = o'94 3i54 Sept. 3 3O2 10-4 12 4- 0-02 0-46 = 4- 0-09 2826 3 270 - 21-8 13 0-26 4- '4o = 4- 0-36 5 3 3 02 4- 14-2 13 0-07 0-46 = o-i i 2830 Feb. i 250 + 13-9 12 0-27 4- 0-38 = 0-26 6 3 292 - 19-5 13 4- 0-07 0-45 = 4- 0-07 i i 245 + 24-9 I I -0-19 4- 0-30 =4-0-23 3168 9 221 - 77 I I 0-06 0-39 = 4- 0-61 8 ii 108 I I'O 13 0-20 4- '44 = + 0-46 3173 13 169 - 87 13 O-I2 0-46 = O"2I 2843 H 72 - 7'9 12 o-ii 4- 0-43 =4-0-02 7 i7 I 12 22'2 I I 4- O-QI 0-32 = 0-13 6 17 28 - H'5 12 -o-ii 4-0-46 =4-0-37 3186 21 61 + 8-4 12 0-07 0-45 = 0-29 7 18 2 5 10-4 12 O'l8 +0-46 =+0'07 7 22 49 - 8-1 I I o-i i 0-37 = 0-16 2853 24 300 + I5-3 I I O-OQ 4- 0-40 = 4- 0-04 3202 2 9 306 - n'3 12 0-14 0-41 = 4- 0-06 6 25 290 + 9 "4 I I 4- 0-08 4- 0-38 = 4- 0-28 3 3 3i 4- 12-8 3 o'i8 0-42 < 0-03 7 27 266 - 17-2 13 0-02 4- '48 = o'i i 7 Oct. 5 233 -f 3-0 12 O'I5 0-42 = 4- O'I2 2861 Mar. 2 217 207 12 o'oi 4-0-44 =4-0-32 3216 9 176 - 8-1 12 O"22 O'37 = 4- O"2I 7 5 188 4- 2-4 1 1 4- o'o5 4- '4! = '7 3221 12 H5 16-0 I I 0-14 0-32 = O'22 2879 15 49 14-3 I I 0-04 + 0-36 : OM2 4 13 129 - 11-7 I 1 0-13 0-34 =4-0-11 FROM PHOTOGRAPHS OK THE SUN, 1874 TO 1912. 37 TABLE VII. continued. No. Date 011 Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean of Latitude. Days _ Equation. of Central Longi- r M . oan . Group. , - Meridian. tude. Latitude. of Days! Equation. 1893- O o 1894. o o 3227 Oct. 1 6 86 4- 23-6 13 0-26.7: o'^Sy = 4- 0-06 35 2 May 1 8 148 - 12-7 '3 4- 0-470; -4- o'i ly = 0^29 323 2 '9 53 4- irS '3 0-24 0-41 = +- 0-20 4 2 o 126 - 15-0 u + 0-36 +o'" = + 0-71 8 20 37 - '3-8 13 0-33 0-34 o'oi 8 24 68 - 3'9 12 + 0-44 4-0-16 = 0-29 3*44 2 4 339 - 6-8 '3 - 0-33 - 0-34 = 4- o 09 3530 25 53 - 19-9 13 + 0-4.8 4- 0-08 = + 0-08 6 2 5 33 i + 7'8 12 0-28 0-36 = 4- 0-68 2 28 17 - 3'4 1 I + 0-37 +0-11 = + 0-04 3250 27 299 + 13-8 '3 0-32 0-34 = 0-52 3 29 357 + 12-6 12 4- 0-43 + o-oi = 0-43 4 28 289 - 7'6 I I 0-26 0-23 =4-0-15 7 June 2 3'5 + 15-0 '3 4- 0-43 + 0-09 = 4- o-io 3261 jSTov. 5 185 - 7'3 I I 0-22 0-26 = 0-26 3554 9 218 I2'I 12 + 0-42 0'12 = + 0-02 9 '4 63 - 6-5 12 0-44 0-15 = o-io 8 '0 201 + 6-0 12 4- 0-44 O-O7 = 0-27 3276 18 '5 + '9'3 13 0-45 0-15 =4-0-40 9 " I8 7 17-0 13 + 0-46 0-02 = 4- 0-54 3281 22 322 - 5 -I '3 - 0-47 - o-ii =4- 0-39 3565 '6 128 + 9'- '3 + 0-44 0-15 =4-0-32 3290 3 220 + 18-2 1 1 0-38 0-08 = 0-33 3573 18 103 4- IO'I 12 4- 0-45 0-08 = 0-28 5 Dec. 5 150 + i9'4 12 0-46 4-0-06 =4-0-11 5 20 75 - '4'4 12 + 0-44 o - o8 = 4- 0-32 7 6 13,9 4-21-6 I I 0-38 0-08 = 0-91 358i 25 360 4- 12-8 '3 + 0*46 0-14 = 0^29 8 6 130 + '9'2 12 0-44 o'oo =4-0-15 5 2 9 3'6 + '6-3 12 + 042 0-15 = o-oi 335 19 330 ! - 0-8 12 0-47 4- 0-07 = 0-06 3599 July 8 186 + I2'2 '3 + 0-42 0-21 = 0-14 7 19 326 + 10-9 12 0-45 4- 0-16 = 0-07. 3604 '0 170 ig-O '4 + 0-44 - 0-24 = + 0-40 9 20 3'4 - 5"o '3 0-49 4-0-13 =4- 0-15 3610 12 '37 + 9'I '3 + 0-40 0-25 = 4- 0-40 33i3 2 5 2 53 + 11-4 12 0-45 + o'i6 =0-39 3 '3 124 + 9'9 12 + 0-38 0-18 = 4- 0-48 6 26 231 27-8 I I '33 4- 0-02 = 0-03 3624 '7 77 - I 2 '4 12 4-0-35 0-25 = O-O2 33*3 2 9 igi 12'I '3 -0-44 +0-15 =-0-31 9 18 56 + 7'5 '3 + 0-36 0-32 =+0-51 5 3' 169 - 7-5 '3 - 0-43 4- 0-23 = + 0-31 3630 '8 53 10-8 13 +O'36 0'30 =+0'O4 7 23 358 + 127 13 +0-3I -0'34 = 4-0-21 1894. o o 8 24 345 + '4' 1 14 4 0-41 0-35 = o-oi 3329 Jan. i ,56 7'9 '3 0-42.1: 4- 0-253/ =4-0-51 3642 27 301 + '8-4 13 '+ 0-31 0-35 = 0-02 3345 9 5' - '4' 2 '3 0-41 + 0-26 = + 0-38 5 2 9 281 21-8 12 +0-29 0-34 = O'24 33J2 '5 336 2'0 12 - 0-34 4- 0-29 - 0-12 3652 Aug. 5 185 + 10-3 '3 + O'2I 0-38 = O'6o 4 '6 3*2 - IS'' 13 -0-33 +0-31 =4-0-52 7 8 '45 + '7'9 12 4- 0-26 0-38 = 0-40 6 '7 310 + "7 '3 -0-33 4-0-32 = 0-25 3662 12 82 - 11-4 12 + 0-17 0-40 = 0-17 8 18 284 + 3-8 12 0-30 4- 0-30 = 4 0-08 3 13 7'' - '4'7 '3 4- o'zo 0-41 = 0-54 3360 2 267 - '4'9 3 0-32 4- 0-37 = - o-io 8 '7 26 + 6-4 12 4-0-19 0-42 =4- o-oi 3 2O 260 - 5 - 9 12 0-30 4- 0-34 = 4 0-34 3692 Sept. 2 '75 + 14-' II 4-0-01 0-34 = o-oi 4 21 255 + 1-6 12 0-32 + 0-31 = 0'2I 3701 '2 40 - '5-1 '3 0-08 0-45 =4-0-25 7 22 234 - 3"' 12 -0-33 +0-35 =4-0-41 2 12 42 + 16-1 <3 O'lO 0-46 = O'O2 3372 2 7 '73 - 6-9 '3 0-25 + 0-41 o-oo 37'7 9 303 + 0-8 '3 0-07 0-47 = 0-04 3385 Feb. 3 74 - 18-3 12 o-io 4- 0-45 = + 0-04 3721 2 5 234 + '9'4 1 1 -0-07 -0-37 =4-0-53 3392 'i 333 - 10-3 12 0-23 4- 0-40 = 4- 0-05 5 Oct. 3 119 + 10-3 13 0-15 0-43 = 0-27 6 13 309 4- n-i '3 o-ii 4-0-46 =0-48 373' 8 60 - 12-4 12 O'l8 0-44 = O'OI 3401 '6 268 - ,4-6 '3 0-18 4- 0-44 - o-i i 2 8 56 + '3'3 13 0-20 0-43 =-4-0-14 2 '6 265 4- 16-9 12 0-12 4- 0-43 =4-0-21 4 9 4' + 18-1 13 o'2i 0-43 = 0-59 8 2 1 2OI -26-5 12 - 0-12 4- 0-41 = 0-17 8 ii 20 + 9'8 I 1 0-24 0-28 = 0-13 3412 22 I8 7 32-0 '4 0-03 4- 0-50 = 0-05 3756 24 2O1 - 14-4 12 0-35 0-29 = + 0-37 3 25 I 5 2 - 25-9 '4 0-13 4-0-51 = 0-26 3770 Nov. 3 77 + 13-9 '3 0-42 0'21 = 0-38 7 26 '43 - '5'9 '3 - 0-14 4- 0-44 - 0-06 6 5 54 4-12-0 1 1 0-23 o'zS = 0-44 3438 Mar. 1 2 309 + '5-3 '3 4- 0-07 + 0-47 =4-0-18 7 5 5' + 7'4 12 0-38 0-24 =4-0'27 344 2 15 271 - 4'5 12 -f 0-12 4- 0-43 = 0-18 3786 9 350 - 5' 12 0-34 0-29 = O'OI 3 >6 264 4- 16-8 I I o-oo 4- 0-35 - 0-45 3804 26 '34 4- 8-6 12 0-43 0-15 =0-31 345 26 129 + 6-8 12 4-0-14 4-0-42 = 0-33 3816 Dec. 5 1 1 - 18-4 13 0-46 0-05 = 0-03 3460 Apr. i 53 4 9' 8 12 4-0-29 4-0-35 =4-0-41 7 4 3 2 - 13-9 II 0-36 +0-09 =0-13 4 * 33 4- 21-5 I i + 0-12 4-0-33 =4-0-17 8 6 355 - 19-5 12 0-44 o'oo = 4- 0-37 5 3 22 4- I4'6 '3 4- 0-22 4- 0-41 = 4- 0-26 38 2 3 ii 300 + 1-6 1 1 0-38 0-03 = 0-06 347' M 7 33 6 - '5'2 '3 + 0-28 4- 0-35 - 0-21 9 21 168 14-6 I 2 -0-47 4-0-1 1 =4-0-44 5 '0 295 4- 18-4 1 1 4-0-17 4-0-33 -0-24 3830 22 '44 -17-6 II 0-35 o'oo =4- 0-42 8 1 288 + 167 1 1 + 0-29 4- 0-24 = 0-08 i 34 8 ^ .. l8 '83 - H'9 '3 4- 0-26 4- 0-29 = 4; 0-30 1895. O o o 6 20 152 - I3-3 '3 4-0-31 4-0-35 = 0-16 3 8 4 2 Jan. 4 345 + 17-' 12 - 0-442: 4- o-o8// = 0-15 8 25 86 - 17-2 '3 4-0-31 4-0-34 =4-0-02 7 6 308 - '7'5 13 0-42 4- 0'2I = O'll 9 . 25 88 - 29-2 12 4- 0-36 + 0-27 = 4-0-15 3867 23 81 + 12-3 12 0-29 4- 0-35 = 0-25 349 2 i -. z8 55 4- 11-9 '3 + 0-41 4- 0-22 - 0-I3 38~ 2 26 49 - 10-5 12 0-24 4- 0-40 = 4- 0-02 3 28 49 4- 22-8 1 1 4- 0'20 + 0-27 = -1- 0-67 4 28 '9 - 12-4 1 1 0-24 4- 0-32 = 0-09 6 May 3 352 26-9 '3 4- 0-33 4 0-33 = - 0-12 5 30 35 2 - 17-6 1 2 0-21 4- 0-42 = 0-62 354 ,, 7 293 + I7-3 12 + 0-39 4- 0-27 = 4- 0-06 3884 Feb. 3 303 + 4'4 13 0-29 4- 0-40 = o-io 3518 ., 16 181 -.4-6 12 4- 0-42 o-oo = 4- 0-30 3892 8 23$ + '3-8 12 -0-15 4-0-43 =-0-49 38 POSITION OF THE SUN'S Axis, TABLE VII. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. I8 95 . o o o 1895. o o o 3898 Feb. 1 5 145 - 9'9 13 - 0-162; + '452/ = + ' Z 4 4250 Dec. 22 16 4- 16-1 12 0-43* 4- O'lty = o'6o 393 z 74 lO'I I I o-ii +0-37 = + 0-14 5 26 321 - 10-3 13 0-45 4- o - i8 =4-0-12 5 22 49 - '3'i 1 1 4- 0-02 + 0-36 = 0-17 6 27 303 12-8 12 0-42 4- 'i8 =4- 0-21 6 24 28 4-2 12 0-12 +0-45 =+0'22 3911 28 334 + 12-9 12 4- 0-03 4- o'44 = o'oz 1896. O O 6 Mar. 2 39 + 13' 12 - 0-03 4- 0-46 = + 0-29 4262 Jan. 2 228 4-11-9 12 0-419; 4- o-i6(/ = 0-13 39 2 3 ,, 3 z86 - 6-0 12 4-0-02 +0-46 =0-52 4277 22 324 io'6 '3 - 0-34 4- 0-33 =4- 0-15 3933 i ,, I' 183 + '3'9 12 4- 0-09 4- 0-43 = 4- 0-02 8 23 304 - 14-0 12 0-29 4- 0-33 = 4- o'o8 4 '2 '74 + 12-1 13 4 0-07 4- 0-47 = 4- 0-53 9 3' 208 - I9'3 H -0-33 4-0-44 =4-0-13 394 16 117 + 4'4 '3 4- 0-04 4- 0-48 = 0-26 4291 Feb. 1 5 5 + 87 12 -0-13 4-0-43 =-0-55 6 20 59 10- 1 12 4- 0-26 4- 0-38 = 4- 0-94 5 23 256 4- 1 6-0 12 - 0-03 4- 0-47 =4-0-53 9 24 24 - 5'i I I 4-0-15 4-0-36 =-0-35 6 25 231 - '4'3 '3 0-09 4- 0-46 = 4 o'6o 3957 3 291 + I 8-2 II 4-0-23 4-'3i =0-32 4300 28 192 - 21-3 >3 0"I2 4- 0-45 =4- 0'2I 3968 Apr. 1 1 '34 - 14-1 '3 4-0-26 +0-40 =4-0-33 2 Mar. 4 129 19-6 '3 4- 9-03 4- 0-48 =-0-19 3975 16 66 - 97 13 4- 0-28 4- 0-37 = 0-69 3 n 7 95 - 11-7 '3 4- 0-04 4- 0-46 = - 0-45 9 ! i7 65 4- I I'O 12 4- 0-31 4-0-31 = 0-15 4321 3' 131 4- 167 '3 4-0-20 4-0-43 = 0-61 39 88 .- 2 4 322 + 17-0 12 4- 0-38 4- 0-24 =4-0-11 6 Apr. 5 66 - 11-9 12 4- o-n 4- 0-45 = 4- 0-07 9 26 302 + 23'9 13 4- 0-38 4- 0-28 = 0-15 7 5 64 - i7'9 '3 4- 0-17 4- 0-45 = + 0-08 4005 May 8 140 - 137 13 4-0-43 4-0-22 =4-0-55 4333 7 34 + ij'9 I I + 0-29 4- 0-28 = 0-24 4022 19 356 + 14-6 12 4- 0-43 4- 0'2I = O-2O 43H June 6 327 2 I'O '3 4-0-46 0-04 =4-0-32 4 23 29 8 + 22'3 13 4-0-44 4- o-oi =4-o-2i 5 8 300 lO'l 12 4- 0-44 4- o'O2 = o'oo 7 25 280 + 2- S 12 4-0-45 4- 0-12 =4-0-25 9 '4 218 - 15-4 12 + 0-48 0-12 = 4- 0-09 8 25 275 24'O 12 4- 0-45 4- 0-03 = + 0-34 4375 24 87 + 197 I I 4-0-30 0-15 = 0-08 4049 June 9 82 - I7-9 13 4- 0-46 o-oi = 0-20 439 July 1 6 1 60 - 15-4 12 4- 0-39 0-27 = - 0-89 4052 ii 48 - I5-5 13 4- 0-48 o-oo =4- o'i8 5 18 124 20-6 12 4-0-31 0-31 =4-0-26 3 '2 39 - IS'} II 4-0-36 4-0-05 = 0-73 9 '9 1 1 1 22"O 12 4- 0-32 - 0-30 =4-0-13 5 16 348 + I0'4 '3 4-0-46 O'I2 =0-23 4405 Aug. i 35 - 8-3 I I 4- 0-23 0-32 = - 0-13 7 ; ,, 19 39 + 21'4 "3 4-0-45 O'll =0'20 7 15 121 20-1 '3 4- 0-16 0-42 = 4- 0-05 4063 23 249 + 167 12 4- 0-43 0-14 - 0-24 44'7 Sept. 5 211 -l 7 -8 II 4- 0-05 0-35 = 0-06 4077 July 6 77 -18-4 12 4- 0-41 0-14 = + o'io 4428 '6 56 + IS'' 12 0-09 0-51 = 0-14 4084 12 i - 6-2 12 4- 0-33 - 0-31 =- 0-39 4435 25 298 I2'I 12 0-02 0-45 = 4- 0-62 4095 17 297 - 15-2 I I 4- O-22 0-30 = 4- 'I2 4447 Oct. 22 302 - 7'4 I I 0-27 0-26 = 4- 0-34 4104 3 127 - 12-7 I I 4-0-28 o'22 =+0-55 4456 Nov. 8 7 6 - I5-4 12 0-39 0-17 = o-i i 6 Aug. 4 62 - 7'5 12 4- 0-26 - 0-35 = 0-08 4472 Dec. 5 91 + 9-1 12 0'43 O'OO = -f 0'22 4110 6 22 + 10-5 13 4- 0-17 0-48 = 0-20 3 5 78 16-7 I I 0-32 0*16 = o'oo 2 8 3 - 7'o 13 4- 0-23 0-41 =4-0-18 4 6 68 4- 20-1 I I - 0-35 4- o-io = - 0-15 4 i 339 -t- 1 6-0 13 4- 0-20 0-43 = 0-96 4488 25 186 + 5-6 I I 0-39 4-0-11 = o-io 4122 19 218 + 8-9 I I 4- 0-12 0-35 =4-0-20 3 21 198 + 19' 12 4-0-13 - 0-44 = 0-56 1897. o O o 4'33 30 79 8-4 12 + 0-08 0-44 = 4- o-oi 449 1 Jan. 4 49 - 13-0 13 0-433; 4- 0-19^ = - 0-07 8 3i 55 10-4 I I 0-03 0-40 = o-io 7 9 343 - 6-9 12 - 0-35 4- 0-27 = - 0-21 9 bept. 2 28 + 10-8 H 4- 0-03 - 0-55 =4-0-11 9 '9 211 19-0 12 -0-35 4- 0-24 - 0-04 4158 '2 258 + 107 13 0-07 0-46 = 0-60 45 co 20 2O6 - 8-4 I I 0-29 4- 0-21 = 4- o-oi 4171 22 130 - H'9 12 o-c6 0-43 =4-0-12 45' 3 1 58 + 57 I I 0-27 + 0-24 = 0-49 4180 3 26 + 11-5 '3 0-20 0-41 = 4- o-io 7 Feb. 2 23 - 2-3 12 0-23 4- 0-45 = 0-20 3 Oct. 2 2 + 14-8 13 0-25 0-37 =0-64 8 5 347 - 5'4 13 0-24 4- 0-40 = 0-35 5 Sept. 30 24 - 15-4 I I 0-21 0-28 =0-05 4526 '5 212 + 6-5 12 0-14 -f 0-44 = 0-21 7 Oct. 3 346 + 16-3 I I 0-19 0-31 =4- 0-48 453' ,, 28 4 6 4- 12-1 13 0-03 4- 0-46 = -f 0-15 9 6 30 5 + 21-3 '3 0-19 0-43 = 4- 0-20 5 Mar. 4 348 - 7'9 13 0*04 4- 0-46 = 4- 0-03 4i97 '7 '57 + 13-6 1 1 0-26 0-26 = 4- 0-02 6 4 352 4- 2-2 12 4- o-c6 4- 0-45 = 4- 0-09 4201 24 7i + 10-9 1 1 0-30 O'2I = 0-44 4549 2 7 41 2-1 I I + 0-14 4- 0-33 - 0-35 5 27 Z 4 - 1 6-8 12 0-32 0-28 = o-io 4553 Apr. i 34' I3-0 I I 4- 0-03 4- 0-36 = 0-56 7 27 27 + 9' 2 12 0-38 0-30 = 4- 0-48 4 3 3>8 + 4-1 13 4- 0-38 4- 0-41 = o-ii 8 29 357 + 177 12 0-36 0*27 = 0-33 r 3 5 289 - 11-6 I I + 0-20 4- 0-34 . 4- 0-24 4210 Nov. i 324 + 9'4 I I 0-34 O-I4 = 0'2I 6 7 262 - 3'3 13 4- 0-24 4- 0-42 = 4- 0-07 i 4 291 + 11-4 12 0-38 0-28 = 4- 0-04 9 9 233 + 5'5 II 4- 0-20 4- 0-33 - 0-15 8 18 92 - 5-6 12 0-42 o-ii = 0-15 4572 May 5 260 - I2'3 '3 4- 0-36 4- 0-28 = 4- o-io 4221 20 72 - 27 3 0-46 0-14 = 4- 0-27 3 7 233 + 37 12 4-0-37 4-0-23 =4-0-08 6 24 21 -15-6 13 0-43 0-12 - 0-13 9 3i 270 - 9 -I 13 4- 0-48 4- 0-03 = 0-09 4231 3 2 97 + "7 II 0-36 o'o8 = 0-23 4588 June 27 271 - 87 13 4-0-44 O-I7 =4-0'2I 9 Dec. 1 2 43 12-4 13 0-45 4- 0-08 = 4- 0-32 459 July 4 179 - 37 13 4-0-43 0-21 =4-0-29 4241 '4 124 + 18-9 13 0-48 0-02 = o-io 2 9 116 I I'd 12 4- 0-38 O'22 = 0-14 3 15 108 - 21-4 I I 0-36 o-oi =4- 1-26 4 '3 67 - 57 I I 4- 0-33 0-16 = - 0-13 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 39 TABLE VII. continued. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Mean Latitude. No. of Days. Equation. 1897. o o o 1901. o o o 4600 July 26 248 + H' 13 + 0-29* - o'372/ = + 0-23 4953 May 2 5 162 + 87 13 4- 0-462; 4- o-ogy = 0-13 I '6 255 - 87 1 1 + 0-21 0-33 = 0-13 5 June 21 169 4- io-o 1 1 4- 0-36 OMO = 0-25 5 Aug. 8 68 - 5'6 '3 0-14 0-45 0-40 4962 Nov. 19 329 - 20-5 13 0-44 0-16 = 0-06 461 1 21 259 - 7'3 12 -4-0' 1 1 0-42 =0-19 5 Sept. 5 7i 5-6 13 o'O2 0-46 = o - 6o 1902. o o o 7 6 5' 4- 14-9 13 -j- 0*03 o'49 = o-oo 49 6 3 Jan. i o 1 1 - 7-8 II 0-400: 4- 'o"jy = 0-29 9 8 36 - 10-5 12 O-OI 0-48 = + 0-20 8 Mar. 8 333 4-24-6 12 4- 0-04 4- 0-45 = o 6 1 4 6 3 2 , 26 144 + 5'4 II 0-13 0-35 = 0-17 4972 May 2 9 3 2 5 4- 25-8 12 4- 0-42 4- 0-03 = 0-29 4- Oct. 2 73 - 6-2 12 -0-15 -0-43 -0-13 4982 Sept. 27 161 20-9 II - O'lO 0-34 = 0'2<5 5 2 62 + 9-8 12 0-18 0-44 = 4-o-2i 3 Oct. 10 357 + 97 12 - 0-32 - 0-37 = 4- 0-14 4656 Dec. 2 345 + 7-3 12 0-47 4- o-oi = + 072 499 Nov. 20 182 4- H7 12 - 0-43 0-14 =4-0-29 4663 12 21 I + 9-8 13 0-48 4- 0-03 = + '49 5 13 201 + 11-6 13 0-48 + 0-07 = 0-62 1903. O O o 5005 Feb. 1 5 I 12 + 23-9 II 0-042: 4- '35,'/ = o'66 1898. O P o 8 Mar. i 285 4-18-9 ii 0-15 4-0-31 = 4- 0-06 4671 Jan. i 3 I2 + 13-8 13 0-422; 4- o'ziy = 4- 0-49 5013 Mar. 27 37 4- 21-3 13 4- 0-19 4- 0-42 = 4- o'20 3 4 269 + 6-6 12 0-37 4- 0-24 = 4- 0-26 5 Apr. 2 229 16-4 I I o-oo 0-37 = 4- 0-58 4 9 2Og + 9'9 13 0-36 + 0-28 = 4- o'o7 7 8 141 - 19-8 13 4-0-21 4-0-41 =4-0-37 7 2 65 ~ 8-4 12 - 0-37 + 0-32 = - 0-37 5024 29 228 4- 20-0 12 4- 0-40 4- o'2i = 0-61 8 22 35 + 10-3 I I 0-30 4- O-22 = 0-53 547 June 21 243 4- 19-8 12 4-0-42 o'i2 =4-0-08 4681 2 5 358 + 4'4 13 -0-3I +0-39 =+0-27 5072 Aug. 15 2 34 4-21-2 II 4-o'i2 0-38 0-38 7 Feb. 1 3 101 - 7'i 13 0-21 -f- 0-44 =O'34 5091 Oct. 8 243 + 13-4 13 O'2O 0-43 = 0-04 8 H 89 - 8-4 12 0-13 4- 0-45 = 0-42 3 ii 203 - 21-3 13 -0-23 -0-39 =-0-34 4692 21 3 + 5'2 12 0-15 4- 0-43 = + 0-08 5 20 9 2 4- 14-6 13 0-34 0-32 = 0-27 7 28 264 - 9-9 I I 0-08 -4- 0-33 = + o - 6i 8 31 298 18-8 13 - '33 '33 = + i' 2 9 8 Mar. 6 190 - 8-2 13 + 0-04 4- 0-46 = 0-24 5100 Nov. $ 2 33 4- 17-1 13 O'JI 0-05 = 4- O'I2 4702 i' I2O - 13-2 12 + 0-09 + 0-47 0-36 2 8 199 2 3' I I O-25 O-2I =0'02 3 12 116 + II-J I I o'oi 4- 0-36 = 0-25 3 9 190 22-0 I I 0-26 0-19 =0-38 4 '3 104 - 7-9 12 + 0-04 4- 0-43 = 0-20 4 ii 164 24-6 13 0-35 0*27 = o-oi 4713 Apr. 7 128 - n'4 H -t- O'26 -j- 0-46 = -- O'O8 4* i 169 - 21-6 I I o'34 0-13 = 0-26 4726 May 1 2 20 - 6-1 13 + 0-44 + 0-19 - 0-07 5116 Dec. 3 230 + l6'4 12 0-42 0-05 = o-ii 473 2 i, 22 2 45 13-6 12 4-0-I5 +0-41 = + 0-14 5126 13 99 + i3 - 9 '3 0-47 4- 0-06 = 4- 0-03 4749 June 24 I/O 10-4 1 I + 0-34 0-21 = 4- O'll 9 H 8? 4- 19-6 13 0-45 4- 0-09 = 4- 0-24 4765 Aug. 5 334 + 10-9 12 + 0-24 0'39 = 4- 0-90 5134 21 349 + 22 - 4 13 0-44 4- 0-09 = 4- 0-02 9 8 34 - 11-8 II + O-lg 0-26 = + 0-36 4778 Sept. i 34> + n-3 12 0*03 0-46 = o'i8 1904. O o 4781 9 239 I2'I 13 0-04 0-46 = 0-48 5142 Jan. 4 172 - 14-4 12 0-382: 4- O-2I7/ = -f 0-09 9 Oct. 4 265 - 5'5 12 0-13 0-40 = o-oi; 6 i 84 4- 18-1 13 0-43 4- 0-20 = 0-03 479' 6 240 I2'I 13 0-20 o - 4i = + o'o8 5i5i 19 329 4- 20-4 12 0-36 4- 0-20 = 0-06 4801 28 305 + H'9 13 - 0-32 - 0-32 = + 0-44 5164 Feb. 10 37 -t- 12-8 13 0-17 4-0-41 =4-0-59 8 Nov. 7 170 - 107 I 2 0-42 o'23 = 0-52 5170 i, 2Z 233 + I9' II -0-15 4-0-35 =-0-34 4817 Dec. 3 202 - 77 12 - 0-44 O'02 = 4- O'22 i 24 207 - 12-9 i.3 o-oo 4- o - 5O = 0-39 9 8 I3 2 + 12-4 12 o'43 0-02 = 4-0-11 5182 Mar. 1 5 3i3 - 1 6-6 13 4- o'io 4- 0-46 = 4- 0-05 3 21 237 + 9'3 12 -h 0-06 4- 0-44 = 4- 0-14 1899. O o 5195 31 105 4- i5' 2 12 4- 0-17 4- 0-40 = 4- 0-22 4829 Jan. 1 1 38 - 14-5 I I 0-302 4- o-igy = o'3o 5200 Apr. 6 18 + 17-9 I I 4-0-31 4- 0-22 = H- 0-25 4838 Feb. 6 57 10-8 11 0-17 4- 0-34 = o-oo 2 H 276 - i5'9 13 4- 0-30 4- 0-35 = 4- 0-08 4845 Mar. 2 1 217 - 9-0 13 + 0-15 4- 0-47 = -i- o'i2 6 20 197 4- 18-1 >3 4-0-32 4-0-31 =-0-39 8 Apr. i 61 - 12-9 12 4-0-20 +0-40 = + 0'5I 9 27 105 - 12-8 13 + 0-39 4-0-28 =4-0-35 4850 15 244 - 7-2 I I + 0-14 + 0-33 = + 0-14 5210 27 107 4- 12-8 I I 4-0-31 4-o'2i =0-43 5 2 9 61 - 12-7 12 4-0-33 4-0-27 =4-0-26 7 May 8 319 4- I9'o I I 4- 0-28 4- 0-14 = 0-24 7 May 26 61 - 12-8 '3 4- 0-44 4- o-i i - o'oi 5240 June i 6 2I'I 12 4- 0-42 t- 0-02 = 4- '35 4863 June 29 33 1 + 57 12 + 0-46 0-13 = + 0-29 5252 '9 120 - 1 6-2 13 4- 0-44 OMO =4- 0-06 5 July 10 180 10-2 13 4- 0-42 0-23 = 0-03 3 19 120 4- 12-5 13 4-0-44 0-09 = + 0-15 4887 Oct. 28 169 - IO'O I I 0-26 0-28 = 4- 0-39 6 24 49 + I9 6 I I 4- 0-34 0-09 = 4- 0-09 4890 Nov. 17 267 57 ii -0-28 0-19 =4-0-07 5262 July 6 261 4- 1 6-0 12 4- 0-42 0-19 = 0-08 4 4 145 4- 13-1 3 4-0-41 0-23 o-oo 1900. O o o 9 21 58 - '9' 1 1 I 4- 0-26 0-28 - 4- 0-17 49'7 Apr. i 292 I I 'I '3 4- 0-222: 4- 0-40/7 = 4- o'ai 5 2 75 28 326 + 23-4 I I 4- 0-27 - 0-25 = + 0-49 4929 May 27 272 + 4'I 12 4- o"44 4- o'io = 4 o'O2 5283 Aug. 8 181 4- 26-2 12 + 0-24 - 0-34 = 4- 0-17 4935 July 21 268 - 6-2 I 1 4- 0-30 o-zi = - 0-29 5 i 156 f 13-1 12 4- 0-24 0-37 - 0-26 4943 Oct. 22 117 - 5-0 12 0-28 0-35 = 0-45 5296 28 282 - 17-6 12 4- 0-09 0-46 = 4- o'i6 4 2 3 109 - 6-2 12 - 0-35 - 0-33 = - 0-08 8 2 9 256 - 14-1 I I 4- o'i i 0-34 o-i i 40 POSITION OF THE SUN'S Axis, TABLE VII. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Meridian. Lon S i- T M . ea " tude. Latitude. of Days. Equation. of Group. Central Meridian. Longi- Mean t.uli. Latitude. of Days. Equation. 1904. o c 1906. O O 5316 Sept. 27 242 + 3i'2 13 0-233; 0-40^ = 4- OM 2 5837 Apr. i 172 - 137 12 -\- o-24-e 4- o - 42)/ = 0*03 5322 Oct. 1 1 53 - 17-2 12 0'3I O'38 = O'OZ >843 6 106 + 19-1 13 4-o-zl 4-0-44 =4-0-40 5 13 23 + i3' 13 0'34 0-33 - 0-29 9 ii 43 4- 24-0 13 4-0-27 4-0-33 = o-oi 5343 Nov. 2 127 - 16-8 12 0-35 0-31 = + 0-06 5852 '2 20 - i9' 2 12 4-0-28 4-0-30 =4-0-38 535' 7 60 16-0 12 - 0-34 - 0-25 = - 0-32 5 22 274 + 15-9 13 + '3 ! + o'35 - '25 6 1 6 300 - 22-5 12 0-38 O'2O = O-2I 5865 May 10 ifj + 7'2 13 4- 0-43 4-0-24 =4-0-53 5360 22 219 4- 10-6 12 0-41 0-17 = 4- 0-17 6 ii 6 2I'I 14 4- 0-48 4- 0-27 - 0-23 4 2 5 I3 -f 20'O 13 0-46 o-i i = 0-65 7 12 355 4- 12-6 13 +0-45 4-0-16 =0-48 5381 Dec. 10 352 4- 20-8 12 0-42 o-oo = 4- o - i i 5870 25 182 + 9'5 i3 +0-49 +0-05 -0-51 3 ii 334 4- I7-0 12 0-43 o-oo = o'oo i 28 131 4-II-9 13 +0-46 0-02 =+0-23 9 '4 290 + iz-S 12 0-46 O'02 = 0-34 8 June 5 30 4-I5-I : 11 4-O-42 4- 0-05 =0-41 539 16 268 4- 16-7 13 0-44 4- o-io = 0*03 5885 ii 305 4- 14-2 ; 13 4- 0-44 4- 0-02 = + 0-50 9 24 35 4- 1 1 -6 12 4-0-40 0-18 =+0-26 1905. o o " 5 8 93 3 66 + 6-1 ! 12 4-0-45 0-18 = 0-23 5421 Jan. 13 255 4- 2I-O '3 0-363; + o-292/ = + 0-30 6 29 76 4-21-8 12 4-0-37 -0-23 =-0-56 4 15 225 + 9'4 12 0-34 + 0-30 = + 0-04 4 July I 45 4- i2-z 12 4-0-38 0-21 =4-0-05 7 20 171 - I2'3 12 0-32 + 0-30 = + 0-65 5 ;> I 4i - 9-6 12 4-0-41 0-17 = 0-40 5434 26 78 l6'4 12 0-28 4- 0-37 = 079 8 4 6 4-21-0 H 4- 0-43 0-30 = 0-16 544' Feb. 4 328 - I5-3 13 0-21 + 0-41 = -f- o'o8 5901 4 9 -|- I0'2 I I 4- 0-36 0-09 = -(- 0-22 2 8 279 4- 12-5 13 0-17 + 0-43 = o-oi 8 10 290 4- 18-6 I I 4-0-29 0-15 = 0-23 4 9 258 - 28-8 13 0-17 4- o - 42 = 4. 0-18 5912 16 ZOI + 17-9 12 4- 0-32 0-30 = 4- 0-24 545* H 2OI 4- 20-8 12 0-20 4- 0-39 = 0-20 3 18 178 + 87 13 4- 0-38 0-30 = 0-23 5469 3 79 - 14-8 II 0-16 +0-31 = 0-69 5923 24 104 4- 4-2 13 4-0-29 -0-38 =4-0-13 547 26 37 4- 6-4 12 0-15 4- 0-44 = + 0-13 4 24 97 + 3'4 13 + 0-34 - 0-34 = - 0-43 i Mar. 3 329 - 1 6-8 13 o'oo + 0-46 = + 0-27 593i 3i i 4- 22-0 H 4- 0-31 0-44 =4-0-13 3 8 271 4- 10-5 12 O'OI 4- O'42 = 4- 0'20 5 Aug. 1 3 200 + I8'5 13 4- Q-22 0-41 = 4- 0-05 5481 20 I 10 - 22-7 12 + O-O2 4- O'4I = 0-50 5944 26 2 4 -167 12 4- o'o6 0-43 =4-0-19 5 5 39 - 17-2 II + 0-01 4-0-36 =4-0-25 6 28 354 + 22'7 H 4-0-05 -0-51 =--0-37 9 3i 325 - I5-5 12 + 0-19 4-0-40 =0-04 595 6 Sept. 4 274 + 5'3 I I 4- o'n 0-38 =4-0-25 5519 May 6 206 4- 22'2 I I 4-0-34 4-0-12 =4-0-27 8 4 266 - 9-6 I I 4- 0-03 - 0-38 = 4- 0-21 55*9 17 64 - I5-I 12 + 0-45 4-0-18 = 0-17 5960 8 217 4- 1 8-8 12 4-Q-I2 0-41 =4- 0-21 555 June i 3 70 - '5'9 12 4- 0-46 0-03 = 0-06 i 9 198 2P2 12 0-04 0-44 = 0-46 2 14 56 + i9-5 12 + 0-43 O'O2 = 0-03 5 13 146 + 9'4 I I o'oi 0-36 o'i8 3 14 S 2 - i5'4 12 4- 0-46 o-oo = 0-33 8 i7 93 4- 8-4 14 0-13 0-54 - 0-09 55 6 4 2 5 259 + 6-2 12 4- 0-42 0-19 = 0-13 59 8 3 3 280 19-8 1 I 0-18 0-31 =4- 0-27 5577 July 7 IOO I2'O I I H- 0-29 0-23 =4-0-21 6001 Nov. 4 '83 4- 15-8 12 0-32 0-31 = 0-25 5586 ii 52 - I5-I 12 + 0-41 o-2i = 4- 0-24 4 13 61 io-6 12 - 0-41 - 0-14 = 0'22 9 16 342 + I3-' 12 4- 0-38 0-24 = 0-09 6021 ,, 29 210 4- 10-5 13 0-46 0-14 =4-0-3I 5620 Aug. 1 2 347 4- 12-2 13 + 0-23 0-42 =4-0-01 4 3 196 + i7'i 12 0-46 0-06 = 4- 0-05 2 14 323 + H7 I I -f OM7 - 0-33 = 0-22 6042 Dec. 1 6 346 4-12-0 12 0-45 4- o'o6 = 0-24 5638 3 114 + 15-8 I I 4-0-15 0-33 =4-0-21 5 '8 323 + IS' 8 14 0-53 4- 0-13 = + 0-75 5 6 43 Sept. 4 44 + 7'8 I I 0-08 0-37 = 4- 0-65 6 18 3 2I i6'o 14 0-52 4-0-10 = 4 1-09 5 6 55 13 286 + 2-4 12 4- 0-03 0-46 = 4- o-oi 6051 24 240 4- 19-9 1 I 0-37 -i- 0-05 = 4- 0-59 8 H 270 - H'4 I I 4- o'io 0-38 =+0-30 3 25 227 + i7'9 1 I - 0-33 4- 0-14 . 4- 0-03 5660 IS 259 4- 15-4 12 0-14 0-45 = 0-19 5682 20 162 + I3-9 12 0-28 0-33 = 4- 0-20 5 28 58 + 6-6 H O'39 0-36 =; 4- O-IO 1907. O O O 5712" Nov. 1 6 1 68 4- 12-3 II 0-31 o-i 6 = 0-08 6059 Jan. 3 107 + 7'3 12 0-413; 4- o-232/ = 4- 0-35 6075 > H 329 - 13-2 12 0-41 4- 0-23 = 0-19 6 15 323 - 13-9 13 - 0-43 4- 0-23 = - 0-13 1906. o o o 7 15 319 20'6 12 0-36 4- O-2Z = 4- 0-22 5775 Jan. 1 4 104 + 8-2 13 -- 0-372 4- o-3iy = 4- 0-24 6081 15 314 16-2 II 0-24 4-0-31 =4.0-70 5788 28 287 7-4 12 '0-28 + 0'37 =+0-22 7 21 231 4- 20-3 12 0-29 4- 0-30 = 0-15 579' Feb. i 233 + 17-3 IZ 0-24 4- 0-35 =0-15 8 21 231 - 157 12 - 0-32 4- 0-33 = 4- 0-40 8 10 107 4- 8-6 12 0-25 + 0-35 = - 0-13 6090 ,, 26 174 + 4' 8 13 0-30 4- 0-38 = 0-05 5802 20 339 10-8 13 o-io + 0-47 = 0-06 3 27 158 4- 8-8 12 - 0-35 4- 0-29 - 0-59 3 22 309 + 13-3 12 0-04 4- 0-47 = 0-19 8 ,, 3 113 + 7'9 12 0-19 4- 0-39 = o - io 6 23 298 + 16-3 I I 0-09 4- 0-36 = 0-22 9 Feb. 2 82 4- 21-6 I I 0-18 4- 0-30 - 0-45 5816 Mar. 1 2 75 + 4'9 13 4- 0-04 4- 0-48 =4-0-12 6100 ., 2 73 4-11-0 I I O-lg 4-O-3O = 0'2I 5821 ,. 21 313 4- 16-6 12 4-0-18 4- 0-38 = 4- 1-06 i 4 54 + ii'3 I I 0-26 4- 0-23 = 4- 0-40 2 22 2 95 - 8-0 I 1 4-o-ii 4-0-34 = 0-28 3 10 337 - I3H 13 0-15 4-0-46 = 0-18 2 4 275 4- 14-0 13 i-f 0-12 + 0-44 = 4- 0-03 7 ii 322 - 4'i 13 0-15 4-0-46 =4-0-49 5830 27 244 - 8-5 12 ,-f- O-I I +0-41 = -|- 0-03 8 12 306 - 1 6-6 12 0-12 + 0-44 = 4- 0-43 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 41 TABLE VII. continued. No. Date on Mean No. No. Date on Mean No. of Group. Central Longi- Meridiaii. tude. Mean Latitude. of Days. Equation. of Group. Central Meridian. Longi- tude. Mean Latitude. of Days. Equation. 1907. o o 1908. c. o o 6l 13 Feb. 19 221 + 14-4 ii 0-172; 4- 0'3iy = 0-27 6385 Mar. 21 35 - 37 1 1 + 0-050; + o'33y = o-ii 7 2 3 164 + 3-6 13 O'll 4- 0'45 =009 6\ 21 2 4 8-5 II 0-02 +0-36 =+0-51 6123 Mar. i 77 + 23-3 1 1 0-06 4- 0-36 = o-oo 6390 Apr. 6 181 - 9'3 1 1 + 0-24 + 0-28 = + 0'02 6134 8 357 + 12-7 12 o'oo 4- 0-45 = o'io 3 7 161 - i5'3 1 1 + 0-29 + 0-22 = + 0-35 5, 9 345 i6'o I I 0-05 4- 0-36 = 4- 0-03 6401 15 57 - 7'i 13 + 0-31 +0-39 =-0-36 6 9 339 - 137 13 + 0'02 4- 0-46 = 4- 0-27 6 23 308 - 3'o 12 + 0-34 -r-0'31 =-0-17 614.0 ii 309 - 16-6 13 +0-05 -t-0'45 = 0-27 7 24 295 - 7-6 12 + 0-34 +0-27 = O'll 6150 '9 202 + 8-6 1 1 4- 0-21 +0-31 =4- 0-37 6416 May 3 184 - 8-9 12 + 0-37 + 0-26 = - 0-34 6 Apr. 4 356 4- 12-2 12 4- o'i6 4-0-39 =+0-54 8 2 192 + H'i I I + 0-33 +0-15 = 0-06 9 6 324 4- 1 1 -6 13 +0-26 +0-39 = + 0-25 9 4 170 - 1 1-6 12 + 0-34 +0-29 =+0-16 6161 8 303 - 177 12 +0-I9 +0'37 =0'54 6420 5 . 162 - H'9 13 + '33 + '3^ =+0-18 4 ii 264 -15-8 ii 4- 0-12 +0-32 = 0-55 6436 19 33i + 11-4 13 + 0-49 +0-05 = 0-42 6172 25 77 + 7'i 12 + 0-29 4- 0-37 = 4- 0-52 6440 June i 159 - i5-i 12 +"0-41 + ox>6 = o-oo 6184 May 9 246 - I2'5 13 4- 0-40 4- o'23 = + 076 i 2 144 - 3'0 12 + o'45 + O'o6 = 0-09 6197 June 4 271 - I5-9 12 4- o'44 4- o'o6 = 0*07 8 6 95 ->i'i ii +0-34 +0-10 = + 0-42 6201 15 128 - 19-2 1 1 4- o'34 4- o'o6 = + 071 6453 15 333 + 10-4 12 + 0-44 o-oi =+0-17 2 6 US + II-2 1 1 + 0-38 +0-07 =-0-13 6464 29 '54 - 3' 12 +0-41 0-15 = O'OI 5 19 66 - H'4 13 4- 0-46 o'ii = 0-42 5 3 131 - i5'5 13 +0-43 -0-17 =-0-37 621 1 July 7 194 + 3'5 1 1 + 35 '2Q 4- 0-16 6478 July 20 235 - 20M 12 + 0-34 0-29 = + 0-2; 5 17 64 - 18-6 '3 + 0-31 -0-34 = + 0-39 6481 20 22 5 - 207 I I + O'29 O'2O = O'Sl 6 17 53 - 5'4 13 4- 0-42 0-28 = 4- 0-32 9 27 I2 7 16-3 12 + 0-26 0-36 = + o'3o 6220 26 33 - 7'8 13 + 0-29 0-40 = + 0-15 6490 Aug. 4 26 - 15-0 13 + 0-28 o'35 = + 0-76 3 29 252 + 7'5 12 4- 0-26 o'39 o'oo i 6 O + 1 1 "9 H + 0-08 0-54 = + 0-08 6 Aug. 2 198 - 87 12 -f- O'29 O'37 = O'22 6503 20 I8 5 - 15-1 12 + 0-17 0-40 = + 0-43 6233 13 37 - 19-2 13 + 0-24 0-39 0-04 6510 31 35 + 6-8 12 + 0-09 0-44 = + 0*23 4 16 27 + 15-5 13 + 0-31 0-37 = 4- o'oi i 31 3i -13-8 13 + 0-06 0-45 = o - i i 6 19 333 -23-6 12 4- O'i4 o'43 = 0-16 7 Sept. 3 355 ~ 6 '4 '3 + 0'05 0-46 = 0'O2 8 21 310 - 7'9 12 4- 0-20 0-39 = 0-28 9 9 280 - 5-5 H o'oi 0-54 = + 0-05 9 25 265 - 14-1 12 4- 0-17 0-41 - 0-91 6520 9 268 + 12-3 13 o-io 0-50 =+i'i6 6241 Sept. z 153 + 7-6 13 4- 0-09 0-45 = 0-36 2 1 262 +13-6 12 0-09 0-46 = + o'i7 5 7 9i + 6-5 12 0-04 0-47 = 0-41 4 ,, 12 232 - 127 I I 0-09 o'32 = + 0-08 7 ii 37 - 7-8 I I 0-05 0-36 = 0-57 5 ,. i 6 183 - 2-5 13 O'o6 0-46 =+o'i8 6255 16 326 - 23-0 12 o'o; 0-41 = 0*29 6 20 129 + 9-0 12 O'o6 0-42 = o'io 6 ' 8 39 + 7'2 H 0-07 0-54 = + o - io 6533 26 45 + 9'2 13 0-07 0-52 = 0-26 9 23 243 + 7'2 12 - 0-03 - 0-45 - 0-33 7 Oct. 3 313 12'2 12 o'2i 0-38 = o - o8 6260 23 244 - i7'4 12 - 0-07 0-42 = 4- 0-44 9 6 279 - 5'3 13 0-20 0-43 = + 0-18 3 24 230 - 14-4 ii o'oo 0-36 = 0-33 6540 6 272 + I2'O 3 0-15 0-43 = 0-04 7 Oct. i 135 - i7'o 13 0-18 0-40 = + 0-42 6558 Nov. 3 2 7 2 + 12-8 O'26 O'26 = O'l I 9 i 137 + 8-1 ii 4- o'29 0-47 = 4- 0-03 9 8 208 13-9 o'28 0-24 =+0-31 6276 12 SS 2 22-1 II 0'27 0'2I = 4-0'OI 6562 i 178 + 8-9 0-35 0-15 - 0-25 9 15 315 6'2 12 0'24 0'38 : O'44 4 ii I6 4 + n-8 o'36 0*04 = + o'og 6280 15 3n + 7'5 13 0-26 0-38 = O'OI 5 ii 158 + 1 1 -6 - 0-35 o'oo = + o'i2 2 '9 254 + 57 13 0-29 0-39 = 4- 0-09 7 18 7 6 + 3'4 12 0-45 0-07 = 0-20 3 20 238 + 87 13 - 0-40 0-26 = + 0-41 6577 Dec. 8 l68 + I2M 13 0-48 + 0-02 - o'i6 4 21 228 + 8-1 12 -0-27 -0-35 = + 0-17 6588 25 307 - 16-2 I I o'32 -4- o'2O =+0-25 5 22 221 4- 10-3 12 o'32 o'32 = 4- o'o8 9 ,, 28 '43 - 16-2 12 0-31 0-30 = 4- 0-89 6296 Nov. 9 339 14-6 12 o - 43 0-16 = o'22 1909. O O o 6300 15 265 + 11-4 13 o'44 0*19 = o'ji 6591 Jan. 3 1 87 + 9 - o 13 0-462; 4- o-2oy = + 0-23 i 15 259 + 7'i 12 o'35 0-26 = 0-31 2 5 i fi 7 + H'o 12 0'4I + O'2I =4-O'I7 6316 Dec. 6 34i - I3-3 13 o'49 o'O2 = 0-26 9 ., 12 62 + IO'2 12 0-36 + 0-31 =4- o'5i 8 ii 277 + 127 "3 0-45 4-0-04 0-13 6602 19 3*7 - 3'0 13 - 0-28 4- 0-34 = + 0-53 9 ,, 12 265 4- 9'6 13 0-45 + 0-05 - 0-22 3 20 316 | - 13-3 12 - 0-34 + 0-24 = 4- 0-50 6 3 H 21 H3 - 5' 13 - 0-44 4-0-11 - 0-14 4 22 2 9 7 + 6-9 13 o'32 4- 0-29 =4- o-ii 6 25 101 - 7'3 I I -0-35 +0-13 = + 0-19 6 29 209 + 9'3 12 0-26 4- o - 36 = 4- 0-26 7 29 203 - 8-9 13 0-30 +0-39 =4-0-53 8 3 >9 2 + 89 12 0-30 + 0-34 = + 0-05 1908. O o 9 Feb. i 167 + 9'i 12 0-26 4- 0-36 =4-0-21 6338 Jan. 9 262 4-11-4 12 - - 422; + 0'22J/ = O'OI 6610 2 152 - 1 6-6 13 0-25 4- o'4o = 4 0*52 6344 ii 227 - 16-2 13 0-39 4- 0-28 = o 57 6620 16 329 10-8 II -0-15 4-0-46 =4-0-37 9 17 148 - 4'i 13 - 0-38 + 0-24 = 4- O'OI i . i g ; 2 99 + 97 13 0-15 4-0-46 = 4- O'o8 6372 Feb. 26 345 - H'S 13 - o-ii + 0-45 =+ 0-34 5 26 192 - 21-3 '3 -0-07 4-0-43 =4-0-25 6382 Mar. 1 5 101 - 7'9 12 + 0-13 +0-44 =+0-16 7 28 i6 7 + 10-0 13 OMO 4- 0-44 = 0-02 POSITION OF SUN'S Axis. 42 POSITION OF THE SUN'S Axis, TABLE VII. continued. No. of Group. Date on Central Meridian. Mean : Longi- T Mean , tude. Latitude. No. of Days. Equation. No. of Group. Date on Central Meridian. Mean Longi- tude. Meau Latitude. No. of Days. Equation. 1909. o o 1910. o o 6628 Mar. i 151 - 1 6-8 I I o-i7a; + o"$oy = -f- 0-23 6796 Jan. 2 57 + 4'3 12 0'43A- 4- 0-20J/ = + 0-32 . 9 i 155 - 6-2 13 0-07 + 0-48 = 4- 0-23 6805 '5 246 4-0 12 0-35 4-0-28 =4-0-29 6630 2 146 - 7'8 13 0-03 4- 0-48 = o-io 6 2 4 135 - 7'6 13 0-31 + 0-40 = 0-03 2 ' ,, . 3 125 + 3'4 12 4- o-oi 4- 0-46 = -|- o - i5 8 27 85 -11-3 1 I 0-20 -4- 0-34 = 0-69 7 ,, ' 15 336 - 8-9 '3 + o'oi 4- 0-49 = 4- 0-07 9 28 82 16-0 '3 0-23 4- 0-40 = 4- 0-38 6642 ,- 2 4 208 + n'4 12 4- 0-18 4-0-41 = 4-0-20 6811 29 66 4- 6-5 12 0-30 4- 0-34 = 0-05 4 25 193 + 8-2 13 4- 0-14 4- 0-46 = 4- 0-02 3 Feb. 1 6 186 13-9 12 0-06 4- 0-43 = 0-05 6 2 5 203 - 97 II 4- 0-18 4- 0-35 = 4- 0-42 7 22 105 6-5 ii o-oi 4-0-40 =4-0-32 7 27 167 + 97 12 4- o - 2i 4- '4i + 0-50 8 2 3 97 - 7'0 II 0'06 4-0-37 =0-30 6651 Apr. 3 76 - 10-3 12 4- 0-27 4- 0-40 = 0-04 6826 Mar. 1 5 188 12-5 12 4-0-15 4- 0-43 = 0-39 2 4 71 4- IO'I 12 4-0-24 4-0-42 =4-0-18 8 ' 29 4 + I5-8 12 4- o-i i 4-0-42 =4- o-i 6 5 20 218. + 9' II 4- 0-23 4- 0-30 0-29 6832 ! Apr. 15 141 - 7'5 ii 4- 0-12 4- 0-36 = + 0-25 6660 24 I 6O - 6-9 12 4-0-28 4-0-32 =4-0-21 6845 May 13 129 | 16-0 12 4-0-4! 4-0-12 =4-0-07 7 May 10 302 + 97 I I 4-0-29 4- 0-18 = 0-40 7 ,, 18 64 107 II 4-O-28 +0-22 = O-OI 8 13 275 - 137 12 4- 0-38 4- 0-21 - o-io 9 19 50 | - 10-9 12 4-0-48 4-0-10 =0-38 9 13 266 -16-5 3 4- 0-40 4- 0-26 = 0-06 6855 3i 253 + 3'4 1 1 4- 0-36 4-0-15 =4- 0-39 6674 ,, 28 68 1 6-9 12 4- 0-39 + 0-14 = o'o2 6864 July 6 139 4- 7 -9 12 +0-34 0-22 =4-0-o6 8 June 12 238 19-0 II 4- 0-35 4- 0-06 = 4- 0-27 6873 Aug. 2 146 7-1 ii 4- o -2 5 0-25 =4-0-51 6686 July i 347 I'2 12 + 0-42 0-16 = 0-34 4 9 48 -15-3 '3 +0-23 -0-40 =-0-20 6693 21 74 + 5'9 "3 + '37 0-31 0-04 6880 Sept. 5 47 15-9 12 o-oo -0-43 = 0-30 5 24 39 + 6-2 13 4-0-34 -0-33 = 4-0-44 6 26 128 6-6 12 0-16 0-40 =4-0-16 9 28 339 + 15-3 13 4-0-34 -0-33 =4-0-05 6893 Oct. 2 58 I2'4 12 0-I5 0'44 ' 0-I7 671 1 Aug. 20 4 2 + 7'2 12 4- o'i8 0-40 =4-0-21 4 3 47 - H-' 1 3 0-24 0-40 = + 0-40 6728 Sept. 24 306 - 4-8 H 0-16 0-53 0-29 7 2 J 160 4- 6-3 12 0-30 0*31 = 0-67 6733 Oct. 4 168 - 12-6 13 0-19 o"45 = 4- o"43 9 24 >3 ~ 7'9 12 0'2O 0-35 = 4- 0-76 4 4 167 - 0-9 13 0-19 0-46 = 4- 0*09 6 ., 7 129 - 12-6 I I -0-24 -0-34 -0-13 8 ii 80 - 9'5 12 O'22 O"39 = 4- O-22 6741 13 5i + 97 13 0-29 0-40 = O-JJ 1911. o o 6 20 312 - 5'5 1 I 0-29 0-24 = 0-I5 6921 Jan. 9 188 - 4 - 5 12 ; o - 4oa; 4- 'I3J/ = 0-20 6753 31 170 + 1-6 '3 0-36 0-33 0-08 5 Feb. 1 5 58 - n'5 12 0-22 4- '37 = 0-02 4 31 168 - 14-1 13 -0-33 -0-35 -0-45 6940 Apr. 9 87 8-4 13 4- 0-27 4- 0-38 = - 0-34 6 Nov. 6 93 - 6-0 13 0-44 0-23 0-16 2 27 203 - 1-8 '3 4-0-36 4-0-30 =4-0-08 6765 17 312 - 4' 2 12 0-46 0-03 = O'22 4 28 189 6-1 12 4- 0-39 4- 0-22 = 0-37 6771 26 183 - 14-1 12 0-45 o'io = 4- 0-40 5 28 188 10-5 I I 4-0-27 4-' 2 3 = 'S5 2 28 167 - i3'4 12 0-44 - o'i i =4- o-i i 6951 May 30 125 4- 8-6 12 4- 0-46 + 0-05 = 4- o-io 6781 Dec. 4 74 - 12-3 12 0-38 -4- 0-09 - 0-36 6972 Nov. 27 264 2-0 12 0-44 0-09 = 4- o"o7 3 19 250 + H7 12 0-45 4- 0-09 - 0-36 6 2 4 184 - 12-9 13 0-42 4-0-35 = 0-09 7, 25 172 I2'I 12 0-41 4-O- I 2 = O-I I 1912. o o 8 2 5 170 + 15*0 12 0-41 4- o'l i 0-32 6977 Mar. 1 3 295 - I2'5 12 4- 0-06 a- + 0-5 1 y = + 0-08 6791 29 118 + 9'4 13 0-42 4- 0-19 = 0-02 6992 June 23 2 7 - 5'9 12 4- 0-43 o'io - 0-07 3 3i 84 - iSH '3 0-44 4- o-i 6 =4- 0-30 7005 Dec. 17 203 - 1-8 I I 0-39 4- 0-09 = 4- ' 2 III. Recurrent Groups of Sun Spots. More than 10 per cent, of the groups of sun spots return to the visible hemisphere two or more times, and such Recurrent Groups, of which a catalogue was compiled in 1909 by Mrs Walter Maunder and published as an Appendix to the Photo-Heliographic Results for 1906, afford a means of adding to the material contained in the two preceding catalogues. For, just as the equations on p. 8 were formed from the determinations of latitude made near the East limb and West limb respectively, in the case of a group transiting across the visible hemisphere from limb to limb, so a similar pair of equations can be formed in the case of a group passing across the invisible FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 43 hemisphere, from the determinations of latitude made near the West limb before it passed out of sight, and near the East limb after it has returned within view. All' cases of Recurrent Groups, therefore, where the group was satisfactorily observed for three consecutive days before disappearance at the West limb, and again for three consecutive days after reappearance at the East limb, have been used to form equations for the determination of the error of position of the assumed axis. As the mean of three days' observation has been taken in each case, this corresponds to the position of the group on the second day from the limb, and allowing fifteen or sixteen days for the time during which the group cannot be observed at all, or can only be observed in part, the two positions involve an interval of eighteen or nineteen days, as compared with the interval of eight days given by the twelve- and thirteen-day groups of the first catalogue. The longer interval implies that the Recurrent Groups will be more strongly affected by systematic errors due to steady proper motion of the part of the spot-groups. Errors of orientation, on the other hand, will affect the equations derived from the Recurrent Groups to the same extent as those derived from groups observed in the course of a single apparitionj-but with tho OOMB sign'. The following is an example of a Recurrent Group : > * < 1 UJ j > 2 < 10 " TABLE VIII. No. of Group. Date. Longitude of Sun from Node. Longitude of Spot from Central Meridian. Latitude of Spot. 6944 April 23-386 -7i4 O -7-1 24'433 -57-2 -6-7 25-113 -48-2 -6-8 26-425 30-8 -6-3 27-611 -15-2 -6-0 28-528 - z-8 -5-8 29-396 -f 87 -5-8 30-539 + 24-1 -5-8 May 1-306 + 34'3 -57 2-525 I + 50-8) -5-8 * 3'37 > '47''5 + 61-4 V +62'4 -5*7> -573 4-306 1 + 75'') -57) 6950 May 20-086 ) -73'9) ~6 7 1 6-o 21-490 ,64-8 -54'9f -57 -6 22-305 ) -44-1 j -6-3) 23-338 ... 30-8 -7'5 Therefore for the mean of the days May 2 to May 4 the longitude of the spot from the node= 147'5 + 62'4, or = 209-9, and for the days May 20 to May 22 = 164 - 8 57'6, or = 107'2 ; a difference of 102'7 for an interval of eighteen days. This gives the equations 0-98 {x cos 2O9'9 y sin 2O9'9} 5'73 = +z 0-98 {x cos ioj'zy sin 107*- 2} 6'5o= +z giving by subtraction -0-562:+ 1-43 y=+o77. In this way the Recurrent Groups have yielded a series of equations for the determination of x and y similar to those given in the first and second catalogues. The coefficients of x and y are, on the average, about as large as in the first catalogue, but the longer interval increases the effect of the proper motion of the spots, which in these equations, as in those of Table VI., is treated as accidental error. 44 POSITION OF THE SUN'S Axis, TABLE IX. THIRD CATALOGUE OF GROUPS OF SUN SPOTS USED FOR THE DETERMINATION OF THE ERROR IN THE ADOPTED POSITION OF THE SUN'S AXIS. Latitudes of Recurrent Groups observed near the West Limb compared with those observed near the East Limb at the next Return of the Group. Date Nos. of in Groups. Opposition. Mean Longi- tude. Mean Latitude. Equation. N08. Of Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. 1874. o o 1880. o o o loo- 109 July 23 103 i ro + -11x4- o-6y = + 077 34 8 - 359 Aug. 3 1 189 + 22-3 4- '652: + Q'zoy = + o'2O 106- 117 Aug. 1 6 '53 + 10-4 + '45 + '55 =- i'5 359- 375 Sept. 27 187 + 22-3 4- -19 - 0-47 = + 0-30 1 1 0- 119 27 i + 1-8 4- '64 4- 0-26 = 0-54 349- 3 6 4 9 66 + 20-8 4- '40 0-25 = 4- 2-46 105- 116 U 218 + 6-4 4- -36 4- 0-66 = + 1-20 364- 381 Oct. 6 64 + 20'3 + -41 - 0-45 - 1-93 115- 122 Sept. 6 231 - 14-1 + -40 0-05 - 177 381- 392 Nov. 3 60 + 21-6 + 0-50 0-99 = 0-30 118- 124 12 156 - 8-0 + -17 - 0-59 =+ 1-47 367- 382A Oct. 12 357 2O'6 4- "38 0-90 = 4- o-io 121- 127 20 44 - I3-5 4- -51 -0-19 =-0-47 370- 3820; 14 326 + 16-2 4- -19 0-98 = 4- 0-20 I2 4 - 132 Oct. 9 1 6 1 - 8-2 4- O'8i 0-89 = 0-60 397- 43 Dec. 1 3 252 4- 207 o-oi 1-42 = 0-76 129- 134 *3 335 '16-0 |+ 0-38 0-97 = o-io 131- '35 Nov. 4 1 86 + 8-0 '+ 076 0-59 =+170 135- 140 Dec. i 185 + 6-8 0-03 1-58 = 4- 170 1881. O o o 408 - 419 ; Jan. 29 352 + 17-3 - 1-232; - o-gov/ = + 277 41011- 424 Feb. 7 238 - 19-4 I -44 o"8o = 4- i -60 1875. o O O 412 - 426 12 170 14-0 - 1-37 - 0-51 =+ 1-37 142*- 144* Feb. 2 78 + 57 1-352- o-B^y = + 0-30 416 - 427 16 116 + 21-9 i -44 0-44 = 0-40 145 - 151 Mar. i o 321 + 1 8-2 1-61 + 0-02 = 4- 0-53 418 - 428 22 36 + 20-6 - 0-96 0-33 = + '64 151*- 155 Apr. 2 9 14-0 1-39 4- 0-86 = o 44 433 - 45 1 Mar. 26 338 + 21-8 - 1-38 + 0-50 = - 0-53 157 - 159 May 1 5 161 + 87 - 0-37 +1-30 = + 0-83 436 - 453 3' 269 - 15-5 1-56 -f- 0-63 0-47 160 - 163 June 19 62 IO'I + 0-38 +1-49 = 4- 0-90 453 - +71 Apr. 27 270 14-8 0-98 4-1-19 = + 0-27 166 - 168 Aug. 1 3 47 + 7-8 + 1-36 + 0-78 =+ 1-53 439 - 45 6 4 222 + >3'9 1-28 4- 0-64 = 4- 0-64 177 - 180 Oct. 17 281 + 11-4 4- i -08 1-03 = + i -oo 461 - 474 May 6 59 + 6-8 - 0-76 4- -37 =4- 0-84 180 - 185 Nov. 1 3 285 + ii'3 + 0-88 1-09 = 0-63 477 - 49 June i '74 29-8 4- 0-12 + -46 = 1-37 481 - 496 7 87 - 27-2 0-07 4- -6 1 = 0-07 485 - 500 5 346 - 97 4- o'io 4- -26 =4- 1-14 1876. o o o 487 - 506 20 285 + 23-0 4- 0-29 4- '34 = + 07 Mar. 22 170 + ig' 2 - -38 + 0-56 = 4- 2-90 664 687 19 290 - 13-3 - '64 - '37 - '27 317- 320 Apr. 17 1 80 + 19-6 - -io + 0-94 = 1-83 672-- 699 Mar. 4 136 - 1 8-6 -71 + 0-02 = 0-90 321- 327 May 22 87 + 25-2 O-lg 4- I '60 = 4- 1-40 676 691 Feb. 2 5 218 + 07 -50 0-27 = 4- 2-50 34 2 - 35' Aug. 20 325 + n-i + -64 + 0-38 =+ 2-56 691- 718 Mar. 2 4 223 + 0"3 - '43 + '53 =-0-30 343- 354 27 233 + 24-8 + 71 +0-24 = + 0-13 693 7'3 21 268 + 24'4 - -35 4-0-28 =- 1-83 357- 374 Sept. 24 224 -16-3 -t- -28 0-49 1-36 697- 715 22 2 49 - JS'i - -43 4- 0-4.2 = 076 347- 353 Aug. 25 257 + 19-6 4- '6 1 + o'3O = + 2-03 702- 732 Apr. 4 74 - 21-9 0-97 4-1-02 =4- 0-67 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 45 TABLE IX.- continued * Nos. of Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. Nos. ot Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. 1882. o o o 1883. o o 722- 749 Apr. 25 I 5 8 + 20-8 1-053; f i-2o?/ = + o'66 1197- 1231 Dec. 25 47 - 13-1 0-632: '49// =4 no 75- 735 10 5 - I0'5 1-36 4 0-70 = + 0-97 I I 8O- 1200 ' 3 1 1-1 4 0-20 -67 = 0-24 729- 759 May 3 58 - 28-8 - 073 + -43 = + 0-17 I igl- 1215 '2 210 4 8-8 0-09 -53 =4 0-90 744- 767 2' 173 + 22M - 0-52 + -55 =+ 1-33 1202- 1235 28 7 4 '37 - '53 - '55 =~ 3-0 734- 7 6 4 3=> + lO-g 0-94 4 -25 = 4 I -60 1204- 1243 2 9 34 6 4 12-9 -0-60 - -32 =-0-73 762- 779 June 2 i7 14-0 o-oo 4 -35 = - 1-93 781- 797 July 6 293 + '4'9 40-40 + -17 =4-1-00 797- 812 Aug. 2 295 + H'9 + - 32 + 0-99 = - 1-30 1884. o o 785- 806 July 1 3 '97 + 10-4 4 -oo 4 i'24 = 0-86 1235- 1268 Jan. 23 18 4 14-2 -052; o'ggy = 4 ' '20 808- 821 Aug. 14 126 - "'5 + -38 + 0-72 1-47 1255- 1284 Feb. 5 . 208 - 9'' '39 '72 = 4 i '90 811- 827 24 6 + 2O'2 + '68 4 0-45 0-70 1284- 1320 Mar. 3 208 - 97 -68 4 0-06 = 4 0-87 816- 838 Sept. 6 194 + I2'3 + '62 -4- o-io 4 1-77 I3ZO- 1357 3' 208 - 9'5 - -31 40-82 = + 0-03 838- 856 Oct. 2 2OI 4 1 1 '9 4 -46 0-51 = 1-40 1217- 1256 Jan. 9 202 4 1-6 - -oi - 1-32 =4 0-73 830- 845 Sept. 1 5 6 7 - + 2I-I 4 '64 -0-33 = + 0-34 1232- 1266 22 4 + 9'7 -20 1-13 =4 1-30 833- 850 21 351 + 7-i + -28 0-35 = + 1-70 1266- 1301 Feb. 1 8 4 2 4- 9-4 -62 0-51 = 2-73 837- 851 23 324 4 22-1 + -17 0-83 = 0-36 I 3 OI- 1339 Mar. 1 6 43 4 io-o -36 40-16 =40-77 846- 868 Oct. 14 47 22-0 4- -30 0-87 = 4 0-30 1236- 1259 Jan. 1 4 136 - 17-0 -13 1-19 = 0-40 868- 890 Nov. 1 1 40 22'6 + o - 6o 1-47 = 4 0-04 I26o- 1291 Feb. 9 '47 4 7-2 - -40 0-46 0-70 855- 870 Oct. 20 326 + l6'3 + 1-33 0-78 = + 0-67 1264- 1295 15 74 4 11-5 - '44 - 'S5 - '47 870- 895 Nov. 1 6 332 + 15-8 + 0-54 - -47 = + 0-60 1267- 1303 '9 2 3 -25-6 - '55 -0-42 =42-14 861- 878 Oct. 29 205 + '4'9 4 0-94 -36 = 0-30 1288- 1323 Mar. 5 183 4- 13-5 -42 4 0-36 = 4 076 864- 885 Nov. 5 122 + >9'S 4-0-75 -42 = + 0-26 1298- 1324 6 177 + 7'5 -47 40-15 =4 0-60 885- 908 Dec. 2 121 + 18-4 + 0-21 -58 = 4 0-23 1324- 1358 Apr. 2 182 4 8-2 -49 4 076 = 0-60 872- 891 Nov. 14 4 2O'2 + 0-46 - -47 = + 0-33 1358- 1380 29 184 + 7-9 - 0-84 4 1-32 = 4 1-36 875- 894 '5 347 ~ 9' 1 + 0-32 - -29 - 1-64 1308- 1342 Mar. 22 326 - 9'3 -29 4 o-oi = 4 o'i4 887- 904 28 178 + I8'7 + 0-14 - -54 = 4 0-64 1310- 1350 26 268 16-9 - '47 + 0-57 =4 1-46 903- 920 Dec. 1 8 266 - '4'4 0-38 -62 = + 0-03 1317- 1351 27 261 - I2 7 - -41 4 0-34 = 4 1-07 1351- 1374 Apr. 23 265 - "7 0-89 4 1-28 = 1-83 1330- 1360 6 126 - 8-9 - 1-47 4 0-73 = 4 0-80 * 1363- 1385 May 3 121 - 9'i 0-85 4 -46 =070 1883. O O o '343- '37' Apr. 1 4 22 10-4 i 07 4 -06 = o-io 925- 941 Jan. 14 279 - 27-8 -iox i'ijy = 0-20 '37i- 1393 May 1 1 27 IO'O 0-83 4 -31 = 0-33 927- 946 '9 212 - 187 - -12 ni =4- 0-66 1393- H'4 June 7 3 - 8-8 o - i7 4 -48 = 0-64 933- 9 6 29 78 - 8-6 - -19 0-94 0-87 1369- 1389 May 8 59 14-0 0-62 4 -57 =4 0-63 962- 972 Feb. 1 7 188 4 4-0 - -30 0-20 = 1-63 1370- 1381 ' 148 - 7'9 - 0-89 4 -17 = - 1-13 982- 1000 Apr. 4 298 - 17-2 - -23 + 0-46 = 1-63 1381- 1409 29 '53 - 7'' 4 0-02 4 -57 = 0-33 1000- 1026 May i 33 - '57 - '93 + '3 - '''4 1409- 1425 June 2 5 '5 2 - 6-9 4 0-45 4 -36 - 1-40 987- ion Apr. 16 138 + I3'2 i'i2 4 '17 =4- 0-70 1376- 1403 May 22 235 4 8-9 0-20 4 -36 = 4 2~io 999- 1027 May i 303 - 22-3 0-94 + -30 =4-0-56 1403- 1420 June i 8 239 + 87 0-15 4 0-94 = 2-10 1027- 1046 29 298 - 22-8 0-12 4- -59 = 4- 0-50 1388- 1410 ' 3 78 - 2-4 40-13 4 -64 = i-oo 1046- 1066 June 25 292 - 22'9 4 0-39 4 -54 - 1-34 1427- 1448 July 26 90 4- '2-3 4 1-34 4 -oo - 0-50 1030- 1043 May 27 324 -15-6 - 0-18 4-73 = + i'33 1438- 1455 Aug. 5 3i8 - 3'5 4 0-90 4 0-87 = 0-23 1040- 1058 June 1 5 73 - 8-7 + 0-30 4- -49 = 4 i -06 '445- '4 6 3 '3 221 - 67 4 '44 4 0-74 =4 1-67 1058- 1080 July 1 2 74 - 9-6 4- 0-62 + -41 = 0-77 1446- 1468 '7 I 5 8 4 8-0 4 -52 40-31 =-0-34 1080- iioo Aug. 8 74 IO'I + 1-29 -f 0-56 = + 0-20 '454- H76 28 25 - n'3 40-91 40-43 =-0-17 1052- 1067 July i 212 - 25-2 + 0-77 +1-48 =+ i -80 1458- 1484 Sept. 4 282 + 4'3 4 -42 4 o'2o = o'8o 1054- 1074 7 '39 - >5'5 4- 0-57 + 1-43 =- i-oo 1465- 1486 9 224 4 i5' 6 4 "08 4 0-45 = 0-64 1056- 1071 4 173 10-6 + 0-84 + 1-43 = + 1-24 1477- '495 16 I 3 - 13-8 4 -6 1 0-13 = 1-90 1071- 1094 3' 177 10-6 + 0-70 4 0-98 = + 0-66 H95- 'S 18 Oct. 1 3 133 - '3'9 4 '26 0-93 0-60 1062- 1086 '4 39 + 9'8 + -07 + 0-81 =+ i -80 1480- 1501 Sept. 25 '5 4 14-1 4 '45 0-66 = 0-67 1109- 1126 Sept. 1 8 252 - 18-8 + '56 0-28 0-37 1491- 1509 Oct. 8 204 8-5 4 -46 0-80 = 4 o'8o 1 105- 1 123 8 22 4 19-5 4 "64 - 0-18 - 4 1-74 1516- 1538 Nov. 4 204 - 8-4 4 0-65 - 1-51 =- 0-37 1114- 1133 27 I 3 I 22'I -f- -51 0-45 = + 0-07 1532- 1548 24 303 - 7'4 4 0*19 1-49 = 0-70 1133- 1169 Oct. 25 I2 4 - 22- 9 4 '17 -18 =4 0-80 1542- 1556 Dec. 6 144 - 7'i 0-07 1-54 =4 o-io 1 138 1 166 25 128 4 I 1-2 4 '22 -15 =4 0-60 1546- 1563 '7 353 4- 2-7 - 0-23 - 1-54 =4 r86 1142- 1165 25 13' IO'O 4 ''9 -20 =4 0-90 H44- "73 Nov. i 35 - 9'3 4 0-79 -29 = 0-90 1173- 1198 28 35 - 9'3 4-0-27 -53 =40-37 1885. O o o 1198- 1233 Dec. 26 33 10-7. 0-63 -47 = 4 0-70 1566- 1580 Jan. 1 8 294 - '3'3 0-772; I-25?/ = 4 070 1149- 1177 Nov. 6 328 - 12-6 40-88 - -38 =4 1-64 1572- 1594 Feb. 3 84 21-2 - 1-29 0-79 = 4 0-97 1156- 1187 '4 225 - 10-4 4 0-58 -26 =4 0-67 '573- '59 2 ) 113 - 57 1-27 0-99 = 4 0-20 1163- 1188 '5 212 10-9 4 0-64 -48 - o-io '574- '59 6 ., 4 75 4 8-0 1-13 0-75 = 0-90 1172- 1197 27 47 14-0 4 'I2 -42 = no 1632- 1647 Apr. 14 240 - 16-2 1-38 4 0-96 = 4 0-24 46 POSITION OF THE SUN'S Axis, TABLE IX. continued. Nos. ot Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. Nos. of Groups. Date Mean in Longi- Opposition. tude. Mean Latitude. Equation 1885. o o o 1889. o , o 1647- 1675 May ii 250 - 16-1 0-232! -|- I'22i/ = + 0-03 2085- 2086 Mar. 24 312 4- 5'8 1-423; 4- o-47?/ =4- 1-30 1675- 1705 June 6 260 - I5-4 4- 0-03 4- 1-I4 = I'20 2090- 2092 July 5 33 - 67 4- 0-90 4- 1-53 =4- 2-23 1597- 1618 Feb. 25 ,56 - I5-3 - i'55 - 0-38 = + 0-70 2092- 2099 Aug. i 37 - 8-0 4-1*26 + 0-91 = 0-80 1618- 1636 Mar. 24 '59 - H-S - 1-45 + 0-56 = - 1-30 2097- 2IOO '9 161 20'0 4- 1-50 4- 0-39 - 1-27 1638- 1658 Apr. 2 3 128 + I2'0 -1-09 + 0-94 =+ 1-36 1658- 1694 May 19 135 + n-6 6-47 + -46 = 4- 0-93 1650- 1672 " 251 + H'4 - 0-76 + -24 =+ 1-30 1890. 1690- 1714 June 2 1 59 - 107 + 0-38 + -55 = + 0-13 1677- 1706 8 239 + lO'I o-oo 4- '62 = o'57 1706- 1720 July 4 244 4- 9'8 4- o~8i + '44 = 0-20 1891. o " 1720- 1742 Aug. i 250 + 11-9 4- i'37 + '93 =- 3-23 2179- 2190 Feb. 25 37 + I5-8 - 1-543- - o-i42/ =- 0-50 1681- 1701 June 5 274 io - 4 + 0-20 + -44 = + 0-47 2183- 2193 Mar. 6 281 + '9'4 1-50 o'2i = o-oo 1683- 1700 4 276 2'I 0-26 + -39 = 1*17 2199- 22 1O Apr. 27 316 + 22-4 0-86 4- '32 = o'i6 1694- 1716 26 355 14-8 + 0-54 + '47 = 4- 0-36 22O4- 2220 May 10 136 19-6 - 073 4- -41 - 0-53 1710- 1728 July i o 169 - I2'4 + 072 4- -42 = i -60 2205- 22l6 4 217 4- 16-5 0-78 4- -31 =4- 0-40 1728- 1748 Aug. 6 174 - 12-6 + i'39 + 74 = + 2-13 2219- 2236 June 4 164 + 15-2 4- 0-26 4- -46 =4- 1-04 1715- >733 July 1 9 5i 2O-2 + 1-08 + -14 = 4- 2-80 2236- 2255 July i 174 + H'9 + '52 + '57 =- 1-83 1717- 1732 16 9i - 147 + 0-90 + -14 = 3-50 221O- 2231 May 24 312 4- 22-7 0-65 4- 0-90 = 0-66 1718- 1737 28 295 - 9-8 + 1-24 + 0-87 = + 0-83 2255- 2277 July 27 181 4- 16-3 4- i'34 4- i'oi = 0-77 1726- 1738 28 289 - n'5 4- 0-93 4- i -08 = 4- 0-07 2221- 2237 June 7 132 4- 19-2 0-18 4-1-43 =4-1-94 1738- 1759 Aug. 24 291 - 11-9 + 1-64 4- 0-28 = 4- i-oo 2237- 2258 July 4 135 4- 19-1 4- 0-86 4- 1-42 = 270 1756- 1767 Sept. 1 3 23 - 37 + i '62 0-25 = 1-67 2258- 2283 31 131 4- 19-8 4- i '32 4- '4 Z = 0-40 1757- 1770 17 343 + in + 1-48 o - 37 = 2-io 2252- 2270 20 282 + 17-3 4- i'02 4- 1-26 = 4- 3-26 1763- 1775 27 202 - 137 + 1*51 0-42 = 0-87 2256- 2278 28 175 + 24-5 4- i-2i 4- 1-13 =4- 1-47 1773- 1788 Oct. 20 261 16-0 4-1-17 roo = 1-13 2278- 2294 Aug. 24 177 + 24-9 4-1-51 4- 0-39 = 0-97 >783- '797 Nov. 9 5 - 37 4- 0-61 i -44 = 0-70 2294- 2311 Sept. 20 174 4- 26-1 4-1-66 0-45 = 0-70 1795- 1806 Dec. 2 54 4- 15-0 4- 0-20 1-53 = 1-26 2240- 2254 June 28 217 4- 21-3 4- 0*65 4- 1-39 = o-oo 1803- 1813 12 284 + I5'6 0-32 r6i = 2-37 2254- 2272 July 24 221 4- 19-3 4- 1-30 4- i - o6 =+ 073 1812- 1826 Jan. i 29 - 4' 2 0-44 1-40 = 070 2244- 2265 ii 44 4- i 6-2 4- 0-99 4- 1-17 = + 1-07 2247- 2266 ii 32 - 217 4- 0-85 4-1-19 =4- 1-26 2271- 2291 Aug. 1 6 277 - 17-0 4- -50 4- 0-30 = 2-60 1886. o o o 2284- 2297 26 15' 4- 27-2 4- -64 4- 0-49 = 2-84 1821- 1833 Jan. 22 1 06 - H'4 - -392; - o'952/ =4- 0-56 2293- 2306 Sept. 17 224 4-22-5 4- 73 - '39 =- i'4 1828- 1835 ,, 28 32 - 9-8 - -53 -0-87 =-0-37 2295- 2308 18 204 4- 15-1 4- -26 0-34 = 4- 0-80 1835- 1852 Feb. 24 36 - 9'i - -64 -0-34 =-073 2299- 2318 3 53 + H'4 + '57 - '5 8 =- 0-83 1852- 1863 Mar. 2 3 37 lO'O - -42 4- 0-54 =+ 2-23 2302- 2322 Oct. 3 6 - 23-0 4- -20 0-70 = 0-70 1840- 1853 25 24 - 5'4 '69 0^24 = 0-90 2313- 2336 20 '45 4- 20-3 4- 0-84 0-79 = 0-96 1853- 1864 24 25 - S' 2 -60 4-0-43 =4-0-13 2350- 2368 Dec. 7 228 + i9'3 0-08 1-42 = 0-83 1864- 1876 Apr. 20 3 - 6-0 -i 6 4-1-19 =4-1-00 2339- 2355 Nov. 19 105 + i9'3 4- 0-47 1-17 = roo 1876-- 1886 May 1 7 33 - 6-2 0-55 4-1-58 = 0-20 2349- 2364 Dec. 5 265 19-6 4- o'o6 i '66 = 0-56 1849- 1859 Mar. 1 6 131 - i'3 -40 4- 0-42 = 4- 0-20 1859- 1872 Apr. 1 1 138 - ' '3 '31 4- 1-03 = 0-40 1856- 1869 7 2OI + 4-8 -22 4- 0*92 = + i '7 1892. o o 1860- 1874 '3 I'7 - I7-5 - -40 + 0-94 =4- 1-13 2369- 2399 Jan. 6 189 + 28-3 0-823; i'33^ = 4- 0-90 1878- 1884 May 1 4 72 I I'O 0-64 4- -52 = 070 2373- 2397 7 188 - 11-4 o'8i 1-48 = 0-23 5884- 1897 June i o 74 I I '2 4- 0-08 4- -71 = 4- roo 2376- 241 I 18 4 2 4-21-6 -04 1-05 = - i-oo 1906- 1915 Aug. 3 76 - 9'4 4- 1-28 4- 0-80 = 0-67 2377- 2405 >. I0 H5 4- 18-3 -09 i-2o = 0-90 1888- 1896 June 8 94 - 13-8 4- 0-25 4- -61 = 4- 2-20 2405- 2431 Feb. 6 H7 + 19' -31 - 0-55 - ri6 1891- 1901 20 302 - I5-0 + 0-40 4- '65 -4-0-73 2390- 2421 Jan. 29 266 26-9 -26 0-89 =4- 1-86 1901- 1910 July 17 301 - H'3 4- i '04 4- -20 = i -60 2421- 2440 Feb. 26 253 -28-4 - '55 - '40 - 0-50 2403- 2426 3 '94 4- 17-7 0-98 0'77 = 4- 2"I2 1887. O o o 2408- 2433 ,, I" 85 14-8 - "SO - 077 =- 1-83 1978- 1987 May 30 88 8-9 0-2 ix + -40^ = 4- 0-43 2448- 2481 Apr. 4 1 06 + 10-5 - -52 4- 074 = - 1-90 1987- 1992 June 25 96 - 7'9 4- 0-63 4- -65 = 0-17 2481- 2512 May i 107 4- 10-8 - 0-82 4- -31 =4- 1-23 1992- 1998 July 22 97 - 7'4 4-1-13 4- -06 = 4- 0-54 2485- 2515 3 83 - I3-9 - 0-93 4- -41 =4- 0-44 1991- 1996 16 181 - 12-4 4-1-09 4- -10 =4-1-40 2486- 2519 6 38 + 10-3 -0-55 4- -45 =4-0-37 2O2I- 2O26 Dec. 23 226 - 7-8 0-46 -44 = 0-56 2519- 2554 June i 52 4- I0'2 o-oi 4- -63 = 0-34 2492- 2528 May 1 3 313 - 17-6 - 0-67 4- -55 =- 0-63 1888. O o 2507- 2545 24 165 + 18-6 -0-24 4- '54 =4-0-57 2024- 2O29 Jan. 3 83 - 8-3 - 0-673; - 1-542/ =- 0-36 2516- 2544 22 185 4- 22-1 0-08 4- -47 =4- 1-93 2033- 2035 Feb. i o 295 - 5'3 - 1-32 - 0-76 =- 1-53 2530- 2562 June 5 358 + 10-8 0-15 4- '62 = 2-23 2035- 2039 Mar. 8 302 - 4'5 1-48 4- 0-04 = 0-73 2581- 26l I July 2 3 89 4- 10-4 4- i -07 4- -04 =4-1 -97 2056- 2O6O July 7 '45 + 5-3 4- 076 4- 1*25 = 0-90 26ll- 2643 Aug. 19 94 4- io- 1 4- 1-56 4- 0-64 = 0-50 FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 47 TABLE IX. continued. Nos. of Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. Date Nos. of in Grou P s - Opposition. Mean Longi- tude. Mean Latitude. EC) nation. 1892. o o o 1893. o o o 2643- 2675 Sept. 1 5 92 + 10-5 + 1-56* 0-13^ = 0-90 3031- 3075 July 9 140 - 30-9 4- 0-94.8 4- I'ooy = 4- i -34 2559- 2584 June 30 3' + 26-6 4- 0-61 4- -49 - 1-27 3048- 3102 22 3 2I - 6-1 4- 0-60 + 0-85 = 0-03 2560- 2583 29 40 - 31-2 + 0-56 4 -56 = 4- 9-13 3059- 3098 23 319 : + I l-o 4- 1-18 4 1-14 = 4- i'94 2583- 2615 July 28 2 5 30-8 + '09 4- -03 = 0-60 3067- 3112 28 248 + 16-5 4-1-27 4- 1-17 = + 0-50 2598- 2636 Aug. 1 3 174 + 13-1 + -54 + 0-73 . =- 0-30 373- 3>8 26 276 - 14-2 + 0-70 + i -07 =4- 0-07 2578- 2599 J uly 1 8 55 + 14-8 + 0-97 + -30 = + 0-20 3i35- 3i8i Sept. 4 103 19-0 4- 1-32 + 0-17 =+ 0-13 2580- 2612 23 94 - 22-5 + -oi 4- -06 = 0-63 3106- 3156 Aug. 2 1 292 - 18-5 4- i - 6i 4-0-51 =4- i'3o 2612- 2644 Aug. 19 87 - 22-4 + -50 4- 0-63 = + 0-24 3107- 3'55 20 298 + H'9 + 1-46 4- 0-44 =+ 1-04 2644- 2679 Sept. 1 6 79 - 23-1 + "19 0-42 = 0-23 3155- 3203 Sept. 1 6 301 + i3'5 + 1-65 0-39 =4- i'io 2586- 2623 AUK. 3 303 - 8-2 + -26 + 0-87 = 1-87 3203- 3250 Oct. 14 300 + i3'3 4- 1*41 0-96 1-07 2587- 2614 July 28 27 + H' + '24 4- O'SZ = -f- 2MO 3124- 3165 Aug. 23 261 29-1 4- 1-26 o-oo = 4- 0-84 2596- 2626 Aug. 4 282 - '9'4 + -17 +074 =-2'33 3139- 3184 Sept. 4 107 -28-3 4- i-2i 0-06 = 4- 0-30 2628- 2661 Sept. 2 270 - 25-1 4- '04 4- 0-17 = + 0-60 3H3- 3'86 7 57 + 8-9 + 1-64 - 0-05 = 4- 1-47 2648- 2680 '9 43 - 20-5 + -60 0-17 = 4- 1-17 3154- 3202 16 304 10-9 + 1-50 0-27 = + 0-57 2685- 271 5 Oct. 19 9 + 14-7 4- -29 - -02 = + 0-57 3173- 3216 26 173 - 8-4 4-i'47 - 072 . - 0-53 2703- 2736 Nov. 3 171 + 8-4 + 0-55 -27 = 0-90 3216- 3261 Oct. 23 1 80 - 77 4- ri6 i -08 = 0-87 2717- 2745 '3 3i 20-8 + 0-44 - -50 =- 1-17 3191- 3232 5 52 + 12-1 4- 1-42 0-68 o-oo 2726- 2760 21 290 + 7-4 + 0-43 -49 = 4- 0-60 3232- 3272 Nov. i 56 4- 11-2 4- 0-48 1-09 =4- 1-40 2730- 2759 21 294 + 19-8 + 0-33 - '5 6 " + 0-23 3206- 3246 Oct. I 2 326 + 77 4- 1-38 0-87 = 0-14 2734- 2770 2 4 252 - 21-7 + 0-30 - -40 = 0-33 3227- 3266 3 83 4-23-2 + I-03 -02 = 0-52 2749- 2 787 Dec. 1 3 6 -16-5 -o'33 - '54 =+0-33 3244^ 3280 Nov. 7 339 - 6-2 4- 078 -36 = 1-07 2773- 2 794 2 266 I2-I 0-28 '48 = + i-io 3287- 3304 Dec. 5 334 4- 19-1 o-i i -60 = + 0-36 2781- 2795 20 272 27'0 -0-43 - -53 -0-43 3295- 33 2 8 18 152 4- 18-5 0-38 -63 =4- i-oo 3290^ 3317 13 225 4- 18-5 0-04 -6 1 = 0-47 3293- 3321 12 241 + 18-5 -0-27 -0-97 =-0-57 I8 93 . o o o 2811- 2831 Jan. 1 8 247 + 24'4 -I ox O'<)oy = i -06 2819- 2846 Feb. 4 22 -13-8 - -24 - 79 =+ ''34 I8 94 . O o O 2846- 2880 Mar. 2 35 - .3-8 "42 O'2O = O'57 3305- 3352 Jan. i 333 - ''4 - 0-642; - -39?/ =+ i'47 2847- 2881 3 34 - 9'3 '58 0'O6 = 2'20 3318- 3367 9 228 - 3'3 - 0-37 - -05 = - 0-07 2881- 2914 29 43 - 8-3 - -59 +0-50 = 4- 0'33 3322- 3356 3 308 + 1 1 '4 0-96 '34 = 0-80 2914- 2959 Apr. 25 45 - 8-0 -05 + 1-16 = 0-57 335 6 - 339 6 30 309 4- 11-4 - 1-44 - 0-86 = + 0-33 2820- 2843 Feb. i 67 - i7'3 - -07 - 0-75 = + 0-43 3323- 337 12 196 II'O -0-95 - -25 =-3-37 2825- 2851 9 3'9 - 17'' -43 o'79 = roo 3325- 3372 13 171 - 7'2 - -07 - -30 = - 1-17 2861- 2899 Mar. 1 6 216 - 20-4 '41 + 0-46 = 0-64 3354- 3394 2 9 322 - H'3 -43 0-89 = 4- 2-80 2899- 2935 Apr. 1 3 2 IO 19-8 -18 4- 0-88 = 0-83 3360- 3401 Feb. 2 267 - 14-8 -48 0-83 = 0-60 2853- 2889 Mar. 9 302 + 14-5 -56 4- o-oi = 4- 2-04 3371- 3402 3 264 + 16-2 -37 o'66 = 0-90 2856- 2892 10 2 9 I + 9'5 - '64 + 0*26 = 0-54 3402- 3443 Mar. 2 265 + 16-9 -57 O'O2 = 4" I' 2860- 2890 9 304 + 8-9 - '37 0-21 =4- o'66 3386- 3416 Feb. 1 2 '45 + 3'8 -66 0-47 = 0-50 2872- 2906 '9 173 - '57 -21 4- O'O7 = 2'10 3413 3449 Mar. 1 1 148 -25-8 '61 4- o"22 = 0-30 2906- 2939 Apr. 14 1 86 - H'4 - '22 4-1-08 = + 0-23 3414- 3442 2 266 - 4'4 -46 O'O2 = O-26 2893- 2930 8 272 + 24-3 - -II 4-0-94 -0-44 3445^ 347 24 332 - '5'5 - -40 + 0-43 - 0-77 2896- 2924 5 312 - 14-8 - -25 f 0-99 =4-0-47 3460 3492 Apr. 1 4 54 + 10-8 - -22 + -18 =-2-77 2919- 2956 25 54 27-6 0-97 4- -12 = 0-54 3465- 3495 17 21 + 15-1 - -05 + '14 -'53 2923- 2964 May i 33i -13-8 o - 8o 4- '34 = 0-80 3486- 3520 May 4 150 - 13-0 - 0-86 4- '34 =- J'44 2948- 2984 '5 140 - n'3 - 0-44 4- -57 - 2-06 3473- 349 6 Apr. 1 9 35 6 - 27-2 - -29 + 0-98 = - 0-53 2951- 2992 !9 92 2O'I 0-58 + -58 =4-0-93 3478- 3504 24 290 4- 17-0 - -15 + -25 =-0'53 2953- 2993 20 77 - 21-4 0-61 4- '03 = 1-27 3485- 35i8 May 2 182 - 14-8 - 0-59 + -21 = - 1-07 2993- 334 June i 6 77 - 20'3 4-0-58 4- -46 = i-oo 35'8- 3559 29 184 - 15-8 - 0-34 4- '57 =4-0-96 2965- 2994 May 2 1 72 + II-I - 0-40 4- '55 =4- i'6o 3488- 3525 9 86 17-4 0-66 4- '39 = + '7 2967- 3005 29 316 - 127 0-23 + -72 = 0-64 3522- 3555 27 207 - 19-3 - 0-24 + '53 - o-io 3005- 3047 .Tune 25 322 12-2 4- 0-52 4- -46 = 0-63 3533- 358i June i 2 358 4- 12-7 4- o-oi + -65 = + 0-24 2980- 3016 6 21 I + 15-6 4- o- 1 8 + -64 - 1-40 35 8 '- 3637 July 9 359 + 12 7 4 0-86 4- -31 =4- 0-23 2996- 3036 '9 41 + l8'3 + 0-53 4- -33 =- 1-20 3537" 35 8 5 June i 5 3i5 + 1 5' 4- 0-22 4- -50 = i-io 3002- 3042 21 8 - 17-0 + 0-32 4- -57 = + 1-27 3546- 3583 13 345 - 0-9 4- 0-26 + -48 =4- 1-20 3009- 3050 26 39 - 9'2 + 0-53 + '45 -0-33 35 6 5- 3613 29 126 + 9'5 + 0-71 + '54 -o-54 3010- 3046 25 3>3 - I7-0 4-0-30 + '37 =- i'44 3573- 3615 July I 1 06 4- io'o 4-0-57 4- '52 = o-io 3046- 3097 July 22 321 - iyi + i 'oo 4- -14 =4-2-00 3624-3662/3 3 77 - 127 4- 1-16 + '03 = + 0-48 3015- 3054 June 28 285 19-8 4- 0-69 4- 1-41 = 4 0-30 3669- 3694 Aug. 22 138 10-9 4-1-46 + 0-35 o-oo 3054- 3110 July 25 281 - *i'4 + 1-12 + 0-90 = + 2-54 3574- 3 6 4 June 26 172 19-0 + 0-59 4- '44 =-0-14 3018- 3064 June 30 261 + H' + 074 + 1-36 - 0-16 3604- 3654 July 24 167 - i9'3 4- i-2i + -17 = + 0-33 3020- 3071 July 3 220 4- 17-1 + 0-82 4-1-40 - -j- 0-40 3575- 3624 3 /6 - <3'4 + 0-67 4- -41 - 1*24 3071- 3116 30 222 + i7' 4- 1-23 4- 0-82 = 4- 0-56 3599- 3652 22 185 4- n-z 4- no 4- -09 = 4- 2-33 48 POSITION OF THE SUN'S Axis, TABLE IX. continued. Nos. of Groups. Date in Opposition. Mean Longi- tude. M ean Latitude. Equation. Nos. of Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. 1894. o c o 1896. o o 3652- 3689 Aug. 19 182 + 9'9 + -6ix + o'58i/ = -f- 0-97 4395- 4407 Aug. i 122 20-3 + 1-242 + o-99j/ = 1-23 3610- 3658 July 26 139 + 8-2 + -23 + no = + 1-50 4416- 4435 Sept. 1 2 296 - 11-4 4- 1-50 0*30 = 4- 1-30 3640- 3674 Aug. 7 332 - 7'3 + '27 + 0-79 = 2-33 443.5- 444 6 Oct. 8 301 - n-8 + n6 074 = 0-23 3642- 3679 1 299 + 18-1 + -51 + 0-84 = 4- roo 4443- 4457 26 65 -,5-6 + 1-13 0-83 = o~6o 3702- 3734 Sept. 26 42 + 17-1 + -62 - 0-53 =- 2-27 4456- 4473 NOV. 22 77 - 16-1 + 0-56 - 1-57 =+ 0-44 3732- 3776 Oct. 22 55 + 12-6 + "31 -13 = + 0-50 3759- 38oo Nov. 7 206 + 47 + 0-67 -14 = + 0-03 3668-3703/4 Aug. 30 3i + 7'3 -f- -59 -f 0-38 = 0-64 1897. O o o 3745- 378i Oct. 25 i3 - 15-8 4- 'OO '12 = I-07 4486- 4502 Jan. 7 191 - 10-5 0-602 1'iSy = o 96 3812- 3833 Dec. 14 80 + 9' 8 o'i8 '62 = + 0-33 4497- 45i8 23 345 - 6-1 '22 1-13 = 1-30 3817- 3836 17 32 - H'5 0-44 '64 = 4- i-io 45'8- 4535 Feb. 19 348 - 6-6 - -59 - 0-49 = + 0-90 3827- 3847 24 308 -18-4 0-48 -62 = 1-40 4505- 4526 2 206 4- 6-8 -23 0-80 = 0-27 4526- 4541 2 9 215 + 5-6 '63 0-19 = + 0-83 454 1 - 4559 Mar. 28 225 + 5'i '41 4- o'68 - 0-30 1895. o o o 45'7- 4532 Feb. 1 5 2 9 - 1-6 - -56 - 0-44 =- 1-36 3847- 3883 Jan. 20 305 - 18-1 'loa; I'ljy = + 1-26 4532- 4549 Mar. 1 4 38 - ''5 -15 0-15 = -f i -60 3946- 3975 Apr. 3 63 - 9'9 ~ '55 + '83 0-20 4523- 453' Feb. 1 5 42 + 127 - '55 - o'5 2 =+ i'33 3884- 3916 Feb. 1 6 306 + '37 -63 0-41 = + i -20 453'- 455' Mar. 14 45 + I2'2 '07 4- 0-60 = 0-23 3916- 3955 Mar. 1 5 308 + 12-8 '40 4- 0-28 = 4- 0-23 4542- 4554 21 3'3 + 4'5 - '55 + '4' = + 074 3894- 39 z8 Feb. 22 237 + 19' 2 -36 0-48 = 0-67 4560- 4573 Apr. 23 229 + 3'5 - o-95 + ''34 =- 7 3923- 3958 Mar. 1 7 285 - 6-2 '40 4" '42 = O'2O 4579- 4588 June 13 271 - 8-9 + 0-31 +I-66 = 0-17 3933- 39 6 4 25 184 + 3'< - -45 +0'55 =+ I'33 4588- 4599 July 1 1 272 - 9-0 + 0-90 +1-43 = + '67 3957- 3990 Apr. 13 290 + I7-9 -25 +0-98 =+0'57 4594- 4605 26 67 - 5'6 + 0-91 4- i -06 = 0-04 3961- 3995 17 246 26-0 -20 + 0-66 = 1-50 4605- 4615 Aug. 22 7 - 5'6 + 1*63 + o - 3o = 0-26 3968- 4005 25 137 - 3'9 '12 + -23 = 4- O'36 4615- 4634 Sept. 1 8 72 - 5'9 4- i '6 1 0-44 = 4- o-io 3979- 4012 3 63 + n-3 0-99 4- -23 = 0-66 4601- 4611 Aug. 8 257 - 8-0 -1-1-37 +071 =- 1-94 3989- 4024 May 10 300 + 23-1 - 0-53 + -50 = 4- 1-23 4663- 4674 Dec. 26 2IO + 9'8 - 0-52 - 1-50 =- 1-34 3996- 4025 i 296 - !3'' 0-62 + -41 = 0-07 4002- 4027 12 270 + 2-5 -0-52 4- -26 =-0-33 4023- 4055 June 2 34 6 + IO'O + o'oi 4- -68 = 0-43 1898. o O 4055- 4085 29 35' + 1 1 -6 + 074 + -44 - 2-97 4679- 4688 Feb. i 9 - 8-1 - -45* - 0-7 zy = + 0-24 4028- 4061 8 274 - 23'9 + -I 7 + '55 =+ i'7 4681- 4692 7 + 4'8 -53 0-63 = 0-96 4049- 4077 23 79 - 18-1 4- 0-49 + -65 = 4- 0-26 4684- 4698 21 183 - 8-3 - -55 -0-40 -0-43 4052- 4080 25 49 - 16-2 -t- 0-47 + -62 = -h 0-36 4687- 4704 27 102 - 7'5 '51 O'I2 = 0-07 4084- 41 12 July 26 2 - 6-6 + -24 + -14 = + 0-43 4702- 4713 Mar. 24 124 - 12-3 - '43 + '3S =-27 4107- 4133 Aug. 1 6 77 - 87 + '43 +0'5 8 =-0'77 4713- 4723 Apr. 20 I2 9 - 1 1 '3 - o - 88 + 1-22 = 073 4110- 4139 20 25 + 10-6 + '53 + ' 6 7 = 7 4722- 4732 May 9 241 - 127 0-59 + 1-52 = + I -80 4139- 4180 Sept. 1 6 27 -t- II-2 4- '65 0-41 = 1-40 4765- 4778 Aug. 19 338 + in + 1-46 + 0-35 = 0-56 4III- 4135 Aug. 1 8 54 - 5'6 + -50 + 0-64 = + 0'20 4781- 4791 Sept. 22 240 I2'I + i'6i 0-51 -- 0-14 4163- 4189 Sept. 23 33 4" 22'2 + '59 0-42 = + I'20 4807- 4816 Nov. 1 8 2O9 + 5'8 + 0-38 - 1-33 = + 0-80 4171- 4200 Oct. 5 125 - 15-I 4- -16 0-64 = 4- 0-57 4185- 4205 '4 24 16-1 + '19 -oo - + 0-30 4205- 4226 Nov. 10 23 16-2 ]+ 0-74 .- -38 = 1-46 1899. o O O 42OI- 4220 6 73 + n'4 + 0-84 - -25 =-0-63 4841- 4846 Mar. 1 2 IS' 47 - 1-500; + o-i52/ = - 0-70 4208- 4229 '2 358 + 18-3 4- 0-64 -39 = no 4845- 4852 Apr. 3 220 - 9'9 no +1-01 = + 1-50 421O- 4230 '4 328 + 9'o + 0-57 - -56 =-0-30 4848- 4855 '5 6l - 12-8 1-19 + 0-99 = + 0-16 4211- 4231 17 2 94 + M-S + 0-46 - -47 = - 0-63 4855- 4857 May 1 2 61 - 12-8 0-72 -f 1-39 = + 0-80 4*34- 425 6 Dec. 1 4 33 - '3'3 - ''5 - -4' =- i'3 4860- 4865 June 27 183 10-0 + 0-15 + 1-50 = + 0-13 1896. n O 1900. o 4256- 4278 Jan. 10 33 - I3-4 - 0-952 I-22J/ = + 0-34 4915- 4917 Mar. 1 8 290 - n-6 i'6iar + 0-43^ = 0-66 4 2 55- 4 2 77 8 323 - 10-5 - 0'97 - 1-38 - 0'43 4926- 4929 May 13 273 + 4'4 - 0-70 +1-40 =+ 1-03 4268- 4283 '9 182 2O-2 O'gO 0-90 = 073 4930- 4932 June i i 251 - 77 + 0-20 4- 1-49 0-67 4285- 4296 Feb. 1 2 228 14-8 -'150-11 - 0-80 4933- 4935 July 7 259 - 6-6 + 0-95 + 1-35 = 4- 0-06 4295- 4314 Mar. 8 259 + '47 -48 +0-21 =+ 1-64 4300- 4317 '3 196 20-4 '63 4- O'22 = 2-O7 4305- 4320 !5 158 - 16-1 - '59 + '35 =-'5 6 4310- 4326 23 62 - ir8 - -43 +0-19 = + 0-47 1901. O o 434 8 - 4359 May 1 3 101 IO'2 -0-49 4- 1-58 - 0-77 4953- 4955 J une 7 165 + 9'4 4- 0-352 4- r^6y = - 0-77 4368- 4384 June 25 251 -I 5 -6 + 077 +i'34 =- ' '4 4369- 4386 28 217 - I5-0 + I'17 + I '42 = + 0-o6 4376- 4399 July 6 114 21-2 +0-88 +1-33 = 4-1-44 1902. FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 49 TABLE IX. continued. Date Mean N s - of in Longi- Groups. Opposition. ! tude. Mean Latitude. Equation. Nos. of Groups. Date in Opposition. Mean Longi- tude. Mean Latitude. Equation. 1903. o c 1906. o o o 5013 -5020 Apr. 9 306 + 21-6 0-91.7; 4- -o6y = 0-67 5767- 5783 Jan. 1 2 323 + I3-5 0-583; 1-04^ = + 1-46 5024 -5035 i May 12 234 + 19-2 -0-51 + -51 =+1-03 5785- 5802 Feb. 7 336 I I-I - 1-44 - 0-79 = - 0-84 50930-5102 Oct. 25 203 - 22-3 + 1-08 -21 = 0-03 5790- 5803 9 305 + H-2 1-43 0-64 =+ 2-06 50936-5103 26 194 - 21-5 4- 0-98 -27 =+ 1-04 5809- 5822 Mnr. i o 289 - 7'3 1-58 4-0-09 =4-i'' 5057 -5069 July 29 280 22-2 + i'2o 4- -08 = 4- 0-90 5810- 5828 12 261 + 14-6 1-66 4- 0-17 = i-oo 5088 -5095 Oct. 6 9' + 13-4 + 1-40 0-95 = 2-17 5817- 5843 23 1 06 + 19-5 - '57 +0-53 = + 0-47 5091 -5099 22 246 + H'4 + 1-22 -II = 2-50 5820- 5849 28 47 + 23-4 - 1-37 4- 0-50 -- 1-43 5 100 -5 i 16 Nov. 19 231 + 167 + '53 '5 ''3 5842- 5858 Apr. 1 5 162 4- 1 1-9 1-27 4- roo = 4- 0-80 5104 -5120 24 '59 -26-3 + '53 - '53 =+2-14 5854- 5865 27 9 4- 9' z ri2 4- 0-87 = 4- 3-03 5io4*-sn9 24 161 2I'O + - IO -44 = I'2O 5859- 5870 May 1 1 178 4- 107 0-68 4- 1-52 = 4- 2-30 5129 -5146 Dec. 27 85 + 18-8 - 'S9 - '59 =+ l ' 5869- 5885 29 305 4- 14-2 0-36 4- 1-61 = 4- '23 5885- 5903* June 25 305 + 14-0 + 0-49 4- i'4 6 = + '36 5871- 5889 ,, 'I 133 4- n-8 + 0-36 4- i'6o =4- i '37 1904. o o o 5889- 5922 July , 8 135 4- 10-2 4- 0-82 + 1-31 =4- 37 6 5179-5197/8' Mar. 20 69 + '5-7 i-ijx 4- o'4-oy = + 0-27 5878- 5894 June 1 8 37 + '3'6 4- 0-30 4- 1-40 =+ 1-44 5202- 5221 Apr. 28 280 - 15-0 - 0-44 + -27 - 1-70 5894- 5928 July 14 46 + 10-6 + i-oi 4- i'32 =+ i-94 5218- 5240 May 1 8 3 20-8 - 0-37 + -60 = - 1-23 5886- 5898 June 20 4 + 20-8 + 0-39 4- 1-58 =- 0-40 5224- 5243 20 339 ~ 227 - 0-42 + -46 - 0-57 5898- 5931 July 1 8 4 +2i'5 4- 1-18 4- 1-33 =- 1-23 5249- 5262 June 23 256 + 14-8 + 0-36 4- -23 = 2-16 593'- 594 6 Aug. 1 5 358 4-22-3 4- 1-61 4-0-67 =0-50 5264- 5285 July 28 151 4- i3'i + 1-20 + -06 = 4-0-10 5946- 5971 Sept. 1 1 351 4- 21-6 4- 1-56 0-30 = 4- 2-07 5269- 5291 Aug. 3 58 - 18-7 + I'2O + 'DO = O'26 5893- 5926 July 1 3 70 4- 5'9 4- 0-90 4-1-40 =4- 0-97 5299- 5315 Sept. ii 271 4- 19-1 + 1-29 0-03 - 0-47 5895- 5929 5 43 - 9'4 4- roo 4- 1-15 = 0-37 5317- 5329 Oct. 4 323 - 23-6 + 1-25 0-69 = 176 5912- 5935 3 201 4- l8'2 4- 1-16 4- 0-98 = 0-30 5321- 5342 '9 137 + 15-9 4- 0-97 - -07 = 4- 1-07 5933- 5944 Aug. 1 2 24 16-0 + 1-30 4- 0-60 =4- 1-33 53"- 535' 24 57 - 16-6 + I'I2 '22 = 0-27 5936- 5960 .. 2 5 216 + 18-1 + 1-54 4- 0-63 - 0-37 533'- 535 6 Nov. 2 299 - 22-5 + O-gi - -46 - 0-17 6001- 6030 Nov. 1 8 185 4- 15-6 4-0-52 1-28 =4-0-60 5339- 5360 9 218 4- iro 4- 0-90 -40 = + 0-87 6004- 6034 2 7 62 1 1-6 + 0-24 1-47 = 4- 1-46 5366- 5396 Dec. 4 242 + 28-5 4-0-13 -59 - 0-40 6019- 6045 Dec. 5 319 + 14-1 4- 0-16 1-64 = 0-83 5370- 5399 5 234 - 15-9 0-19 -61 = 4- 0-96 6026- 6052 12 222 : 4- 20'O - 0-30 - 1-46 =4- 0-63 5390- 5420 30 266 : 4- 17-1 070 -42 = 1-13 1905. o O o 1907. o o o 54' 3 -5434 Jan. 13 77 - 15-8 -\(>X I'22J/ = + 0'20 6045- 6074 Jan. i 325 + H'2 - 0-85*- i'53y =- 0-30 5416 -5441 22 326 - 1 6-6 '22 I-Og = 1-87 6046- 6076 i 322 - 14-9 0-74 1-62 = 0-50 5441 -5471 Feb. 1 8 329 - 16-0 -63 0-46 = + 1-90 6053- 6087 8 229 + 19-1 0-83 1-24 = 1-76 5471 -5489 Mar. 1 7 327 - 16-1 '58 4- 0-26 - 0-53 6059- 6098 7 no + 7-6 i -02 1-14 = 0-86 5421 -5447 Jan. 27 254 4-21-4 '24 0-95 = o'6o 6067- 6093 13 156 + 77 - 1-05 - 1-30 =- 1-37 5426 -5453 3i 196 + 14-' -17 0-91 = 1-30 6072- 6097 '5 137 4- lo-o 076 0-93 = 0-04 54^7 -5457 Feb. 2 173 - '3-i - -26 074 =4- 1-60 6075- 6103 27 333 - I3-3 - i -i 2 rog =4- 0-40 5442 -5473 22 275 4- n-5 - '59 -0-17 =4-2-27 6103- 6136 Feb. 23 338 - 13-6 1-67 0-19 = 0-06 5466 -5481 Mar. 6 109 i 22'6 -32 0-18 = + 0-27 6108- 6140 26 308 16-6 1-63 0-20 = 4- 1-64 5501 -5525 Apr. 29 115 21'0 - -03 4- -i 8 = 4- 1-03 6140- 6161 Mar. 2 5 306 17-2 1-50 4-0-50 =4-0-86 5524 -5542' i May 23 164 + 1 1 -8 - 0-03 4- -25 = 4- 2-53 6088- 61 12 Feb. 4 232 167 - i'35 ~ '99 =+ 2-50 55 2 9-555 3 67 - I5-4 -0-23 4- -54 = + 0-57 6090- 6115 8 175 + S'3 1-56 0-62 = 0-17 555 -55 8 5 June 26 7' - 16-2 4- o'62 4. -2i =+ 0-70 6099- 6123 16 79 4- 22-4 - 1-36 - 0-53 - 177 5529C-5553 May 31 58 - >5 4 ' 0-41 + -38 =4- 0-60 61 17- 6154 Mar. 9 1 66 4- 2-0 1-46 4- 0-31 = + 3-26 5553 -5586 June 27 S 2 - 15'' + 0-42 + -49 =4- 0-30 6104- 6130 Feb. 20 18 - >3'2 1-56 0-29 = 1-97 5540 -5562 9 300 + 5'4 4- o-oi 4- -57 = + 0-97 6134- 6156 Mar. 2 1 356 + iz - 5 i'53 4 0-37 =4- 0-07 5564 -5595 J"ly 9 262 + 7-' + 75 + '44 - 2-36 6168- 6184 Apr. 26 244 - ii'3 - 1-18 4- 1-17 =+ I-8 3 5569 -5594 7 2 9 I 14-0 + '95 + '37 =+ 'i8 6172- 6189 May 8 79 + 7'4 0-76 + 1-30 = 0-97 5589 -5620 30 344 + 12-6 4- roi 4- -16 =4- -46 6205- 6215 July 3 65 - ,6-5 4- 072 4- i-39 = + 37 5597 -5622 Aug. i 321 4- 14-2 4- 1-09 + 0-83 - -30 6215- 6233 3' 60 18-9 + 1-34 4- i -08 = 4- 1-20 5622 -5653 28 325 + 13-6 4- i'33 + '2i =4- '74 6220- 6238 Aug. 8 3'7 - 7'8 + 1-52 4- 0-89 = 4- 0-60 5628 -5655 31 279 + 3-8 + 1-68 + 0-21 =4- -77 6231- 6241 20 '49 + 7'8 4-1-62 4-0-52 =4-0-24 5682 -5712 Nov. 2 I6 5 + 13-3 4- 0-94 - i 19 =+ 'S3 6241- 6266 Sept. 1 6 152 + 8-2 4- 1-12 - 0-49 = 4- 2-27 5673 -5685 Oct. 15 /* n 49 + 6-3 4- 1-38 0-56 = 0-20 6234- 6249 Aug. 29 28 + 159 4- 1-52 - 0-07 = + 0-33 5680 -5703 28 238 4- 13-1 4- 0-62 I'22 = 0-97 6236- 6255 Sept. 2 330 - 23-3 + 1-46 4- 0-09 =4- 0-77 5704 -5733 Nov. 1 8 322 - 13-8 4-0-21 1-37 - 0-40 6243- 6267 17 34 - 16-8 4- 1-52 0-18 =4- 1-27 5713 -5745 30 '57 - 174 + o-oi - 1-41 =4- 0-80 6267- 6289 Oct. 14 139 - 1 6-6 + 1-24 0-76 0-30 6247- 6273 Sept. 25 37 - 6-6 4- 1-55 0-17 = 2-60 1906. 6256- 6280 Oct. i 310 4- 7'3 4-1-51 0-72 = 4- 0-26 5775- 579 8 Jan. 28 105 + 8-4 i-zSx \'ojy ~ 0-60 6265- 6284 7 229 + 8-1 4- 1-38 0-85 = o-io 5766- 5788 14 283 - 8-0 0-89 1-24 = 2-44 6276- 6293 26 352 - 21-3 + 1-17 1-18 = 0-60 POSITION OF SON'S Axis. 50 POSITION OF THE SUN'S Axis, TABLE IX. continued. Date Mean i Date Mean Nos. of Groups. in Opposition. Longi- tude. Mean Latitude. Equation. Nos. of Groups. in Longi- Opposition. tude. Mean Latitude. Equation. 1907. o o o 1909. o o 6279- 6297 Oct. 28 317 - 6-5 + 1-023; -i6?/ = + 0-54 6603 -6620 Feb. 3 323 I2'I "043; o'66y = i - 6o 6282- 6301 Nov. 2 256 + 6-4 + 1-03 -29 = 1-16 6620 -6637 Mar. i 333 - 9 '9 - -65 - 0-35 = - 1-53 6306- 6321 29 254 + 8-5 -0-08 -54 =+2-04 6589 -6602 Jan. 6 324 - 2-9 0-96 1-31 = + o-io 6286- 6300 I 261 + 117 + '97 - '15 =-0-17 6602 -6618 Feb. 2 329 - 3' - -46 -0-71 =4-0-33 6300- 6319 28 265 + 10-5 + 0-19 - -67 =+ -37 6591 -6608 Jan. 1 6 189 + 8-9 - -17 - 1-24 = + 0-13 6292- 6311 13 112 - 19-2 + '53 - - 43 =+ 'to 6604 -6621 Feb. 5 298 + 7'3 -43 0-83 = 2-80 6296- 6316 23 340 - I3-9 + 0-52 -60 = -84 66lO -6628 16 152 -167 - -59 - 0-54 = + 0-67 6300- 6318 28 Z7I + I2M 4- 0-23 -69 = -80 6629 -6648 Mar. 1 5 '54 - 5-6 -56 4-0-40 = 1-86 6318- 6335 Dec. 2 5 277 + 13'' -0-53 - -44 =- -80 6642 -6655 Apr. 7 213 4- IO'Z - -39 + 0-82 =4-2-27 6319- 6338 26 2 6 4 + 10-5 - '57 - '47 = - '97 6651 -6663 16 81 - 9-8 0-94 4- n6 = 0-96 6323- 6344 29 221 -15-8 -0-38 - -57 = + -oo 6669 -6677 May 27 268 -15-8 0-22 4- 1*56 = 0-43 6676 -6686 June 17 344 2-0 4- 0-37 + i -60 = 1-40 1908. o o o 6687 -6693 July 8 69 + 6-3 + 0-56 + 1-50 =4- 0-73 6338- 6 357 6324- 6349 6344- 6360 6353- 6368 6359- 6 372 6374- 6386 6390- 6416 6393- 6420 6420- 6440 6405- 6430 6408- 6424 6392- 6414 6436- 6453 6441- 6464 6463- 6481 Jan. 22 4 25 Feb. 4 13 Mar. 8 Apr. 19 21 May 1 8 > Apr. 28 ., 17. June i !5 Ju4y 7 265 '45 223 93 34 24 183 162 1 60 29 66 211 332 149 226 + II-2 4'5 - 5'3 - 9-6 - 14-9 - 6-8 - 9'i - IS'' - 15-0 - 8-3 + in -167 + 10-9 - 3' 2O'I I 'I 22 I'o6j/ = + 0-40 0-63 1-50 = - 0-33 -14 0-70 = 2-46 - -27 - 0-81 =+ 1-43 - "64 - 0'57 = - 0-57 '67 + 0'O2 = 4-2-87 - '21 + 0-99 = 4-0-I3 -oi + 1-16 = 0-23 - 0-35 + 1-68 = + 0-97 - 0-79 + i -2 1 = 4- 1-40 o'86 +1-36 = 177 - 1-31 +0-95 = + 0-13 - 0-03 + 1-64 = 4- 1-94 + O'20 + 1-46 = O'20 + 0-87 4-1-30 =+ 2-13 6695 -671 i 6700 -6707 6722 -6733 6/33 -6754 6754 -6772 6772 -6787 6723 -6734 6734 -6753 6741 -6760 6738*^6756 6756 -6778 6744 -6763 6746 -6765 6771 -6786 6774 -6788 Aug. 6 3 Sept. 2 1 Oct. 1 7 Nov. 1 4 Dec. 1 1 Sept. 2 1 Oct. 18 26 24 Nov. 19 Oct. 27 Nov. 3 Dec. i o 'i 4' 83 161 168 167 170 162 168 59 89 96 47 3" 183 169 + 6-7 4- 2-9 - 12-5 - '3'4 -13-8 - 12-8 - 1-6 + 0-4 + i o'9 - 57 - 47 - 15-2 - 4'9 - '3'5 + H'3 + 1-51 4- 0-77 = - 0-20 + i'35 + 78 =- 0-03 4-1-58 O'21 = 0-96 4- 1-34 - -07 =+ 1-30 4- 0-61 -46 = 0-67 o-io -48 = 1-40 + 1*69 0-43 = 0-96 + 1-32 - -05 -- 1-97 + 0-86 - -34 - 2-33 + 0-96 -12 = 4- o'8o + 0-49 -58 =. 1-94 4-0-69 - -14 =4-0-54 4-0-71 -29 = o'io O-II -53 = I'2O 0-09 -50 = 0-93 6465- 6489 '4 I2 9 - I5-9 + 0-89 4-1-28 = 4- 1-90 6490- 6511 6492- 6510 6510- 6533 6494- 6517 6517- 6535 6499- 6519 6519- 6 539 6540- 6558 6558- 6572 6564- 6577 6577- 6592 6569- 6580 Aug. 1 8 18 Sept. 1 3 Aug. 20 Sept. 17 Aug. 26 Sept. 22 Oct. 20 Nov. 1 6 25 Dec. 22 ,, 2 28 30 40 351 356 275 279 272 Z 75 1 66 167 64 - 14-4 + 7'3 4- 8-0 - 6-6 - 6-6 - 5'5 - 5'4 + 12-4 + 13-6 + 12-0 + ii'S 4- in 4- '49 4- 0-67 = 1-16 + -66 + 0-49 =4- i -oo + "61 4- 0-13 = 1-56 + '53 + 0-47 = 0-20 4- '67 0-26 = 4- 0-03 4- -65 + 0-51 - o-jo + '59 - '54 = + 0-56 4- -20 1-03 =+ 0-17 + 0-70 i'i i = 1-37 4- 0-41 1-61 =+ roo 0-48 i -5 1 =4- 0-40 4- 0-18 1-48 = 0-53 6793- 6809 6796- 6811 6813- 6826 6817- 6827 6823- 6828 6842- 6855 6849- 6859 6862- 6869 6874- 6880 6880- 6894 6879- 6886 6886- 6899 ItylQ. Jan. 14 16 Mar, 2 7 '6 May 1 8 June i July 5 Aug. 23 Sept. 19 '3 Oct. i o *3 62 187 I 10 i 248 S 2 33 48 47 122 12 9 - 157 + 5'4 - i3'z - 7-0 + 17-0 + 2-6 10-8 - 5'0 -15-6 - 15-0 - 7'5 - 7-2 0-952 i-26y m 4- 0-04 i -02 1-29 = -56 - 1-58 - 0-09 = - -37 1-61 + o-io =4- -13 - 1-64 + 0-19 = + 2-47 - 0-65 + 1-47 =- -43 0-13 +I-66 = + '4 + 0-80 4- 1-50 = + 0-37 + 1-52 - 0-27 =+ I-o 4- 1-54 - 0-31 - 0-43 4- 1-57 0-26 = - 2-23 + 1-47 - 072 =4- 0-77 1909. o o o 1911 O O o 6592- 6609 Jan. i 8 167 4- i o-o 1-03*; rigj/ = 4- 1-40 6937- 6942 Apr. 1 4 198 - 1-8 1-360: + o'94j/ = - 0-20 6609- 6627 Feb. 14 167 + 9-6 1-39 0-64 = 1-13 6944- 6950 May 12 191 - 6-4 - 0-56 + i'43 =+ 77 6627- 6647 Mar. 1 4 167 + 9'9 1-56 + 0-27 = 0-30 6647- 6661 Apr. i o 169 + 9'4 - 0-94 + 0-97 = + 0-94 1912. o 6585- 6601 Jan. i 29 - 17-1 - 0-77 - 1-43 =+ no 6980- 6982 Apr. 22 305 II'l 1-032 + i'i8y = 0-20 6588- 6603 7 3 1 ' 14-8 0-87 1-48 = 2-83 6989- 6992 June 9 23 - 6 '7 4 0-20 +1^62 - 1-17 Note. In the three Catalogues, Tables VI., VII., aud IX., the quantities on the right-hand side of the equations appear with the opposite sign to that in the typical equation on p. 8, in which x and y denote Corrections to the assumed position of the Axis. The three Catalogues, therefore, give the Errors of that position. FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912 51 IV. Apparent Errors of the Adopted Position of the Axis. The numbers of the groups of spots of each order of duration available in each year are given in Table X. which follows. A space is introduced in the table at the end of each cycle of the Sun's activity. TABLE X. Numbers of Groups of Sim Spots employed. Groups observed consecutively for Total observed at Tntal Year. Recur- rent Groups. i (Hal number of Equations formed. * 8 days. 9 days. 10 days. ii days. iz days. 13 days. 14 days. Limb. Centre. 1874-1877 12 H 12 17 12 8 O 75 37 26 I 3 8 1878-1880 7 5 5 13 16 5 O 5 1 34 '9 104 1881 17 12 6 I I '7 13 I 77 42 3 149 2 1 1 12 12 15 20 13 2 85 5 38 '73 3 18 '3 20 12 27 22 I "3 62 37 212 4 "5 18 '4 16 3 21 O 114 . 67 47 228 5 4 7 8 13 3 24 o 86 67 34 l8 7 1886-1888 12 3 ii 4 20 9 2 81 55 27 I6 3 1889-1891 12 10 9 13 15 24 3 86 55 34 175 1892 12 20 18 '9 31 2 9 3 132 82 43 257 3 24 29 20 25 42 32 2 '74 101 62 337 4 28 21 '7 '4 35 38 4 '57 9' 47 295 5 17 '4 7 17 3 26 I 122 74 33 229 6 12 9 12 8 '4 10 I 66 33 17 116 7 6 5 4 9 12 '5 5' 36 '9 106 1898-1900 13 9 12 1 1 '9 '3 I 78 44 '9 141 1901-1903 7 8 6 IO 7 '3 o Si 30 12 93 1904 18 12 5 8 17 '4 74 39 16 129 5 ii 12 22 9 18 6 I 79 34 27 140 6 H '9 '3 1 1 21 '7 7 102 56 3* 190 7 22 IO 13 '7 28 25 i 116 7' 228 8 3 1 1 21 '4 18 16 2 95 5 28 '73 9 '5 9 5 8 24 25 I 58 34 '79 1910-1912 7 6 1 1 9 21 6 60 36 16 112 Total 327 288 293 3'3 524 434 33 2212 1304 738 4254 In Table XL are given the means of the quantities (irrespective of sign) on the right-hand sides of the equations of Tables VI., VII., and IX. As the quantities x and y to be determined from these equations of condition are very small, Table XI. practically gives the mean discordances, and indicates the weights with which the separate groups should be combined. The first column gives the length of time the 52 POSITION OF THE SUN'S Axis, groups were under observation, the second the total number of groups employed, and the third the mean discordances. TABLE XL Class of Spot -groups. No. of Groups. Mean Discordances. Class of Spot-groups. No. of Groups. Mean Discordances. AT THE LIMBS. TABLE VI. CENTRAL. TABLE VII. 8 days 9 10 ii 12 '3 H 327 288 *93 313 5*4 434 33 0^562 0-670 734 0704 0-645 0-623 0-596 1 1 days '2 v '3 '4 ,, 3'3 524 434 33 o278 0-262 0-246 0-264 Mean . . 0-262 KECDRRBNT GROUPS. TABLE IX. Mean . . 0-648 Recurrent 738 0-971 The different classes of spot-group in Table VI. are of approximately the same weight, and have therefore been combined together with equal weights for each spot- group ; and the same applies to the different classes in Table VII. The mean dis- cordances of the residuals given by the three different methods being , 0'648; 0'262; 0'971 ; the relative weights are 2'38 : 14'57 : T06 or approximately as 2:12: 1. These weights have been adopted in combining the equations resulting from the different methods in order to give the combined mean results in Table XIII. The results given by spot-groups of different durations under the first two methods are shown separately in Table XII. ; in forming Table XIII. the groups of different durations under each method have been combined together with equal weights. TABLE XII. Apparent Errors of the Adopted Position of the Sun's Axis, as determined from Spot-Groups of Different Durations. Method. Duration of Spot-group. No. of Spot-groups. X. y. At the Limbs . . . 8 days. 3*7 - 4'3 o-o , ..... 9 288 + 4'a + 17 ..... 10 293 - 2-6 + 3'6 , .... 1 1 313 2-2 + 7'6 , ..... 12 524 + 0-2 + 5'5 , -..'.. 13 434 3' 2 + 3'9 i 14 33 + 4'8 I'O .. All durations. 2212 P2 + 4'2 Central 1 1 days. 313 + o-i - 37 ,,...... ' ?) 524 + 0-2 + !2 '3 >, 434 + r 4 + 9'6 >, H ,, 33 -14-9 4- 12-4 All durations. >34 + 0'2 + 4M FROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 53 TABLE XIII. Apparent Errors of the Adopted Position of the Sun's Axis as determined from Spot-Groups in Different Periods. Poriod No. of Observations. X. y- Limb. Centre. Recur- rent. Limb. Centre. Recur- rent. Com- bined. Limb. Centre. Recur- rent. Com- bined. 1874-1877 75 37 26 4-IO'Q + i ; o + 167 + 8 : 4 -i 4 : 4 + i6 : 6 / o-o - 7-0 1878-1880 51 34 '9 + 0-8 + 20-9 + 11-5 4- 5'9 + 3'4 4- 77 + 7'2 + 7'6 1881 77 4 2 3 - ''3 + 31'8 -23'3 + o'g + 9' -'3'5 - I- 9 4- 37 1882 85 5 38 - 9-9 + I'3 - 5'3 - 7-6 + 8-3 + O-I - 2-5 + 5'2 1883 "3 62 37 + 0-6 12'0 + 28-8 + 0-2 + 5'3 + 1-6 + 5'2 + 4'4 1884 114 67 47 -11-5 + 17 -15-9 - 97 - 0-5 + 57 -127 - 0-6 1885 86 67 34 -14-1 4- 8-3 -21-5 - 9-8 4- 7'6 o-i + 12-6 + 7'3 1886-1888 81 55 2 7 + 37 + 5'6 - 4'i + 2'5 + 7'5 + 2-4 + 18-9 + 7'2 1889-1891 86 55 34 + 3'o - 7'9 22'O - 2'8 4- 4' +207 +217 + 9' 6 1892 132 82 43 - 5'9 - 7'4 4- 2-6 - 57 4- 87 + 9-5 - 2-9 4- 77 1893 174 IOI 62 - i'5 - ' P 9 + 17-7 + ro 4- 9 '9 + 4-2 + I'2 + 7'5 1894 '57 9 1 47 2-2 + 0-6 + 10-4 - 0-3 - 0-8 + 2-9 2'O o-o 1895 122 74 33 " " f :> 5 + 0-2 -1 1-8 - 5'o + 9'8 + 4-5 + 3-2 + 8-1 1896 66 33 17 + 3-8 I O'O + 9'5 + 2-8 + H7 - 5'8 - 8-7 + 6-9 1897 51 36 '9 10-2 + 5'4 - 97 - 6-9 + 127 - 3'9 + 11-9 4- 6-9 1898-1900 78 44 9 + 3-3 + 10'0 4- 97 + 5'' + 127 + 6-9 + 12-5 + H'2 1901-1903 51 30 12 - 5'3 - 7-1 -28-0 - 8-4 + 3-i -11-6 - 4-1 + 0-2 1904 74 39 16 1 -O + 167 IO'I + 2'4 - 3'3 + 27 2O'2 - 37 1905 79 34 ^7 2-4 - 8-4 2'O 2'O + 4'' - 9'5 + 177 + 3'6 1906 102 56 32 + 5'9 -H'S - 0-6 + I'O + 5'3 + 8-9 + 23-2 + 9'2 1907 116 7i 4i - '3 + 8-6 + 2-2 + n - 87 + 10-9 + 20-8 + 0-3 1908 95 50 28 + 8-5 + i'3 ~ 4'4 + 5'3 + 5'9 -11-3 4-16-3 + 3"' 1909 87 58 34 + 10'2 - i '4 + 2-0 + 6-4 - 9' 2 + 19-9 + 22-2 + 2-8 1910-1912 60 36 16 + 0'4 - 7'5 - 6-6 - 1-8 + 3'9 - 6-1 + 3'9 + 1-2 1878-1888 607 377 232 - 5'5 + 5'3 - 5'3 - 3'4 + 5'5 + I' 2 + 47 4- 4'6 1889-1900 866 516 2 74 2'I - 17 + 2-2 - 1-6 4- 7-6 + 5'6 + 3' + 67 1901-1912 664 374 206 + 2'8 - 1-9 - 0-5 4- -'4 o-o + 3'5 + 14-3 4- 2'5 1878-1912 2137 1267 712 - '-5 + 0-2 ro I '2 + 4'8 + 3-8 + 7'i + 4'8 1874-1912 2212 34 738 1'2 + 0-2 - 0-4 - 0- 9 + 4'2 + 4"' + 6-9 + 4'5 Minimum 482 291 '53 + 2'5 + 0-3 - '5 + 17 + 3'3 + 6-4 + 12-9 + S'o Increasing 621 348 216 - 37 + 2'3 4- 13 - ''9 + 7'i + 1-6 + 0-4 + 5'i Maximum 610 354 190 - 7 - 3-5 + 5'4 - 0-6 + 2-6 + 5'5 + 9'4 4- 4'2 Decreasing 499 3' '79 - 2 '3 4- i'3 - 77 - 2-3 + 3'3 + 3'2 + 7'4 4- 37 In Table XIV. the apparent errors of the adopted position of the Axis have been computed from the spot-groups of different zones. These, as the table shows, are in good accord throughout, but the Northern hemisphere gives a very slightly larger value for y (the apparent error of the inclination of the Sun's equator to the ecliptic) than does the Southern, and this is shown by all the three methods. This result is brought 54 POSITION OF THE SUN'S AKIS, out a little more strongly if the comparison is made not between the two hemispheres in their entirety but between the portions lying outside latitude 10 in each. The values for x are, as usual, less accordant than those for y. TABLE XIV. Apparent Errors of the Adopted Position of the Sun's Axis as determined from Spot-groups in Different Zones. No. of Spot-groups. X. y- Limb. Central. Recur- rent. Limb. Central. Recur- rent. Com- bined. Limb. Central. Recur- rent. Com- bined. Above + 1 8 232 H3 88 + 0'2 i I'l - 17 * -0-3 + 5'-8 / + 2'2 / +5-6 + 1 8 to +14 191 I 12 65 2'I + 4'9 -I3'3 -1-6 + 8-5 + 7-6 + 8-3 + 8-2 + 14 +10 285 '74 96 -4'5 + 3'3 - 4'o 3' + 3-9 + 8-6 +17-5 I +6-5 + 10 + 6 217 121 59 + 3'3 0-3 +13-6 + 3 '8 + 3'' + 7-6 + 6-3 +4-6 + 6 +o 9' 58 30 -8'8 + 1-8 -117 -7'3 + 7-6 + 37 + 4' + 6-1 - o - 6 130 7 6 39 + 47 - 0-9 + 3'' + 3-6 -67 + 9-1 + 0-8 -2-1 6 10 246 139 83 -0-9 - 77 -2-6 + 8-6 + 4'' + 6'3 10 14 281 I6 3 9 1 -3'' + 97 + 8-3 + 0-7 + 2-7 o-i + 6-0 + 2 '3 14 18 270 171 99 + 1-6 - 97 O'l ri + 3'9 -0-3 + 3'5 + 3-0 Below 1 8 269 '47 88 -37 o-i + 7'5 -1-6 + 2-4 + 5'3 + 2-2 + 3' Above + 1 o 708 429 249 -2-4 + 2 '4 - 57 -'7 + 5-8 + 6-5 + 12-5 + 67 + 10 to 10 684 394 211 + 0-4 1-9 - 0-3 O'l + 3-8 + 4'5 + 4' 2 Below 10 820 481 2 7 8 -'7 - 0-2 + 5'0 07 + i'3 + 3-6 +2-8 North. 1016 608 338 -1-8 + 1-8 , - 2-8 -i-i + 5'4 + 6-4 + 11-3 + 6-2 South. 1 196 696 40O -o-S - 1-2 + 1-9 ! -0-6 + 2-2 + 3'5 + 3'0 All Spots. 2212 '304 738 I '2 + o'2 o'4 o'9 + 4-2 + 4'' + 6-9 + 4'5 A group of spots observed in its entirety for eleven or more consecutive days is observed practically from one limb to the other; it is in existence for a complete transit. But this is not the case for groups of shorter duration, observed for only eight, nine, or ten consecutive days. These either form or dissipate while on the visible hemisphere ; or both phases occur there, and the observations made of them are symmetrical with respect to the Central Meridian only in the last case. If, therefore, determinations of latitude made close to the limb are affected by any cause that would give rise to a systematic difference, as compared with those made near the Central Meridian, it ought to appear from the comparison of groups in the three positions. Such an effect, if real, would not entirely disappear from the combinations of all the observa- tions, since the number of groups entering the visible hemisphere at the East limb is greater than the number passing out of it at the West limb. TABLE XV. Comparison between Spot-groups of Short Duration as Observed near the East and West Limbs and Central- Meridian respectively. Duration of No. of Spot-groups. X. y- Group. E. C. W. All. E. C. W. All. E. C. W. I .All. 8 dnys. '39 IOO 85 3H 1 -57 / -17 - 4-6 -4' 3 +0-4 + 6-3 1 -11-3 o'-8 9 ,. I 10 101 69 280 + 4'9 + 0-3 + 11-4 + 4-6 + I-I + 0-7 + 2'I +1-2 10 128 81 75 284 -47 -1-6 + 07 -2-4 + 9-0 -3-8 + 37 +3'9 8, 9. 'o 377 282 229 888 _z- 3 -0-8 + 1-8 -0-8 + 4'6 +o'3 ro +r8 KROM PHOTOGRAPHS OF THE SUN, 1874 TO 1912. 55 The figures given in Table XV. were obtained early in the investigation, before the measures for 1912 were available, and before those for 1905 had been finally revised. But as the Table shows, there is no sufficient indication of any systematic effect introduced by the want of symmetry in the distribution of these groups of short duration, and it is clear that the very small corrections, which would follow upon the introduction of the complete results for 1905 and 1912, could make no alteration in this respect. It did not seem worth while, therefore, to recompute the Table in order to bring it into complete correspondence with the rest of the discussion. V. Evidence as to a General Drift of Sun-Spots. In Carrington's determination of the position of the Sun's Axis, a slight tendency was noted for spots to diminish their north polar distance, so that on the whole, there appeared to be " an average tendency towards the North Pole of 90" in the time during which the Sun rotates through 30 degrees." (Observations of the Spots on the Sun, p. 242.) Carrington regarded this "as a fictitious and non-real result arising from the omission of some small correction whereby the angles of position come out too great in the first half of any Spot's passage over the disc, and too small in the second half." But, whatever the explanation of this small outstanding quantity, it seems desirable to ascertain whether the Greenwich photographs confirm its presence ; and in particular, whether some such tendency on the part of spots in general, to move towards the equator or away from it, characterises any particular zone of latitude, or any particular phase of the sun-spot cycle, since the distribution of sun-spots in latitude is well known to change with the progress of the cycle. For this purpose, the observed differences of latitude, i.e. the quantities on the right-hand side of the equations of condition in Tables VI. and IX., have been grouped in ten zones, as in Table XIV., according to the latitude of the spot-group concerned. The Central equations given in Table VII. have not been thus treated, for, from the way in which they have been formed, they have been cleared from the effect of a steady uniform drift in any one given direction. Table XVI. is derived from Table VI. and gives for the Limb equations, the number of spot-groups, and the mean discordances in latitude for the different zones, both for the three cycles of sun-spot activity over which. the observations extend, and for the four chief phases of the progress of the cycle. Table XVII. is similarly derived from Table IX. and gives the corresponding figures for the Recurrent Groups. As in the preceding tables, motion away from the North Pole is considered positive. It will be seen that the observations do not establish the reality of a common drift of the spot-groups whether this be an actual movement of the spots on the Sun, or be merely apparent, due to some small systematic error of the magnitude of that indicated by Carrington's figures. The average interval corresponding to a Limb equation is seven days, in which time the Sun rotates through 100 degrees, and the average interval corresponding to an equation from a Recurrent Group is over eighteen days, corresponding to about 260 of rotation, so that a movement in latitude of l' - 5 for 30 of rotation would show as 5' from the mean of the Limb equations and as 13' from those given by the Recurrent Groups. But though the individual figures in the two tables show a wide range, the final result is a very small positive movement for the Limb spots, and practically zero for the Recurrent Groups. In other words, though in limited areas of the Sun's surface, 56 POSITION OF THE SUN'S Axis, groups of spots are often observed to have a "set " in one direction or the other that may last for some time, these tend in the long run to balance one another. In Table XVL, the two columns "1874 to 1888" and " 1889 to 1900" are in somewhat striking contrast, and suggest that the photographs of both periods were TABLE XVL Mean Differences in North Polar Distance from Different Zones of Spot-Groups observed near the Limbs (Table VI.}. No. of Spot-Groups. Mean Differences in Nortli Polar Distance. Minimum. Increasing. Maximum. Decreasing. Minimum. Increasing. Maximum. Decreasi ng. Above +18 68 3 45 6 i - 5'5 - 3 : > - s'i + 8-4 + 18" to +14 33 74 60 24 0-3 + 3-8 + 8-1 + 14 +10 35 97 85 68 + 4'' + 10-8 + 6-6 + 3-5 + 10 + 6 44 4 2 71 60 ro + 4' 1 + 1-8 + 97 + 6 + o '9 10 31 3' + i-i + H'9 - ' - 4 + 127 - o - 6 43 10 28 49 - 07 - 9'5 - 4'5 - 8-0 - 6 ,, -10 74 2 9 64 79 + 17 - 9-1 + 6-7 - 5-6 -10 -14 68 53 79 Si + '7 + 4' 2 + 2-8 + i'i -14 -18 36 75 85 74 -13-6 - 1-6 + 5 '6 - 8-9 Below 1 8 62 US 62 2 7 + 4'9 + 12-8 - 8-3 + 2-2 Above + 10 136 284 190 98 + ro + 2 '4- + 2 '9 + 4'9 + i o to i o 180 91 194 219 + 0-4 - 0-4 + 2-0 + 0-6 Below 10 1 66 246 226 182 - 0-4 + 6-5 + 0-8 - 2-8 North . . . 199 336 292 189 + 0-5 + 3'0 + 2'2 + 77 South . . . 2 8 3 285 3i8 310 + o-i + 4'4 + i'6 - 4'3 All Spots . . 482 621 610 499 + 0-3 + 3-6 + 1-9 + 0'2 ,874 1889 1901 1874 1874 1889 1901 1874 to to to to to to to to 1888. 1900. 1912. 1912. 1888. 1900. 1912. 1912. Above +18 71 102 59 2 3 2 -19-7 + 3'' + 2 '9 - 3'9 + 18 to +14 53 86 52 191