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L'exeniplaire filmd fut reproduit grdce 6 la g6n6rosit6 de I'dtablissement prdteur suivant : La bibliothdque des Archives publiques du Canada Les cartes ou les planches trop grandes pour dtre reproduites en un seul cliche sont film6es d partir de Tangle sup6rieure gauche, de gauche 6 droite et de haut en bas, en prenant le nombre d'images n^cessaire. Le diagramme suivant illustre la mdthode : 1 2 3 1 2 3 4 5 6 AUCMlVfS HftWOMBb OTfAWA. OHi. A 1 ^^ ESSAY ON MR.W.H.LYNCirS PAMPHLET ^ENTITLED^ ki SCIENTIFIC VATlllK MAKING" ^.IW^S^fflF. H BY S. M. BARR6. .>^- ?»v^> MONTREAL" 1884. ^ i-:? / Entererl according to Act of Pa.liament of Canada, in the year 1884, by S. M. Barre, in the office of the Minister of Agri- culture. The riglit of transhilion is reserved. <^365/ / lie year f Agri- i:SSAV ON MK W. H. LVNCIIS l'AMl'lll,i:T KMiTi.Rn: SCIENTIFIC BUTTER MAKING. Mr. W. H. Lynch, of Danville, has written a hook on "SCIENTIFIC" hutte- making. Wehave examined it carefully. There are many things in this hook, of which we do not approve. * For the presen, we shall content ourselves with reviewing his theories on the skimming of milk. Success in butter-making depends to a great extent on the method of skimming milk,, for both quality and quantity, are influenced considerably thereby. MR. LVNCH'S THF:0RIES. Almost all that Mr. Lynch has written on the skim- ming of milk, is reproduced in Mr. Lynch's own words, at the end of this pamphlet. For convenience of re- ference, we have numbered it by paragraphs. As far as any ordinary reader can find out, a sum- mary of Mr. Lynch's theories on the skimming of milk, may be given as follows : "Avoid low cooling. It is injurious to the keeping quality and delicacy of flavor of butter. Milk ought to be heated to from 110^' to 1^0^' Fahrt., and cooled quickly to 70^ than cooled slowly to 55^' Fahrt. in order to get the largest quantity of butter without injuring the quality." ^^^ 4 — DKFKCTS OF MK. LYNCH'S THEOKiKS. We must take into consideration the fact that Mr. Lyiich's book has been written specially for the definite puq^ose of butter making on the farm. Since the book is written for a definite purpose, it should contain definite rules, and not " VAGUE THEORIES." Any attempt to criticise Mr. Eynch's book is attended with difficulties almost insurmontable, for the reason that he does not take a decided stand on any question. For instance, in i)aragraphs Nos. i and 2, he says : " Milk may be heated or not heated before setting — heating is not absolutely necessary." In i)aragraphs No. 2, 3, 4 and 15, we find that milk can be heated to 90*^, 100'', 120^, 130^, 140'*, and even short of " scakliny point " without any marked injury to the butter. In ])aragraphs Nos. 2, 4 and 11, we see that milk may be " allowed to cool " down to 50*"^, 55**, 60^, 65° and even 70^ Fahit, without any inconvenience. WTiether the milk set in air or cold water, heated or not, cooled artificially or not, at so many different degrees of temperature, is to remain, in " deep " or " slialloiv " vessels, Mr. Lynch does not say. Not a word is said in regard to the relative value of the different methods at the " di/l'crenl stages of the milking period." This question of " deep and shallow " setting in rela- tion to temperature, and the question of the relative value of the different methods, at the " different stages \\u th< rcl io\ orl acj ti( — 5 — of the inilhum pcrtod,'' are of ;Mtal importance to any farmer who desires to manufacture ^ood butter, obtain the largest possible cjuantity, and thus receive a fair return for his investment. Nevertheless, Mr. Lynch totally ignores this. Evidently, Mr. Lynch is afraid to express an opinion, or rather Mr. Lynch has no opinion of his own. This accounts for the book being filled with useless cjuot.i- tions. Mr. Lynch says, that after having conscienciously studied the treatises of the best authors on dairying, he has taken from each what he found good and useful, and applied it according to the best of his ability, (i) We cannot commend Mr. Lynch for his discrimina- tion, we are much afraid that in many cases he left the good and took the bad. Mr. Lynch claims that his book is a manual of* scten- tl/lc and practical" butter making, by the aid of which any farmer can manufacture butter just as well as a scientific expert. Still he gives no definite rules, the operator is left perfectly free to choose amongst the many different methods irrespective of temperature depth and seasons, and told to rely upon his oa:n " experience " and '' circumstances" Where then is the science ? { I ) Aprhs avoir etudi^ consciencieiisenient les traites des meilleui s auteurs en ces matieies, j'ai pris a chacun tout ce que j'ai trouve bon et utile, et je I'ai applique de mon mieux. I^ fabrication domestique du beurre, par Mr. Lynch, dans le deuxieme rapport de la Soci^te d'Industrie Kaitiere de la Province de Quebec, 1883. m 1 KFFKCT OK 1-()\V ('OOI.INO ON THK KKFP- IN(; QUAM'l'Y OK KUTrKR. In i)aragra])hs Nos. 2, 3, 4, 12, 14 and 16, Mr. Lynch tries to show the disadvantages attending the practice of" loir coolinq or cooliinj brlow 55^ Falirl.'' He con- demns the practice of '* lo\r cnoliiKj " in saying in No. 4, " avoid low cooling. It will be found that keeping quality and delicacy of flavor suffer from low cooling." In this case Tvfr. Lynch has the courage of his con- victions. Is Mr. Lynch's knowledge nich as to make his opinion of any value on this subject? Is he a scientist ? No! Is he a butter exporter? No ! Is he an ex})ert in butter making? No ! Is his assertion based ui)on personal and practical experience? Certainly not ! What evidence does he bring in support of his asser- tion that '' low coolhif/ " injures the " Icepinf/ (/nnlitics'' of butter ? Quotations containing theories of doubtful value, not based on scientific and practical data. We reproduce Mr. Lynch's quotations of Arnold and Sheldon on this subject, in order to give the public the benefit of same : EFKECT OK CHANdK OF TEMFERATUKE ON MILK AND KUTTER. 'It is hrlU'Vcd that it maij be safely laid down as a rale that a)ide and sudden chnnr/es in the temperature of batter globules^ a: he t her after or b>-fore they have been separated from the milk, tend to their destruction. The position here assumnl is supported by the nature — 7- ofbuiln'ilsrlf, „s writ as bij nhsrrfH'd facts, ft isl(nown that the butter f/tolnite is an orf/anized sfrnctare; smatl as it may f)c, each (jlnbale is comj.nse,/ of several atoms off Iff!/ matters, diljerino from each other in their com. posUion, and bound tof/riher in one organized body or ijfobilr. It is notorious that repeated shrinhacje and swrUimj by chanye of temperature disintegrates the afonns of these ylobutes, and causes the destruction of the mass ofbulter which an ayyfomeration of these yto- bules constitutes. Since a number of clianyes produce a specific result, it must be evident that each sinijle chniiye has contributed something toward the end ac- complished. 'Hut such changes have less ejfect while the globules are fresh and new than afterwards. A single chamje made at the most favourable period in Hie age of the butler globule need not be expected to produce a very sironyly marked result. ''There may fje other considerations which nun/ >nake it desiraUe to heat or cool milk, and suddenly make wide chancj... in its temperature; but the e/fect of every such change u/wn the resulting butter, considered sin- gly^and without reference to other effects, must be to impair its keeping.'' If a sample of new milk is talien at 65^\ and a part of it cooled suddenly to the freezing-point, or near it. and then raised again to 65^, and both parts continued at the same degree, the part which has remained all the time at 65^ will keep sweet the longer of the two, showing that dropping the tem/)erature and restoring it has injured its keepim/. - 8 (i ^Nearly all the chaaycs in milk and butler^ by which they are spoiled^ are caused by living agencies^ none of which are destroyed by cold^ although it may fall below freezing. By chilling milk or butter down betow the temperature at which organic change advances, we at levH only suspend advance., to have it start with re- newed vigour whenever the temperature rises to a de- gree that will allow of its going on again. '-^What injures the keeping quality of milk might well be expected to injure the keeping of Hitler made from it. This conclusion is corroborated by recent observa- tions upon butler made by a refrigerating process^ and exposed with other butter during a week of warm wea- ther at a fair. It is also in accordance with observations previously made^ and with observations reported by others r — Arnold Mr. Arnold docs not exactly say that '* low cooling " injures the " /c^epm^ quality" of butter, and the fact that some butter made by a refrigerating process and ex])Osed with other butter during a week cf warm weather at a fair, did not keep, is not sufficient to prove that butter generr.lly made by the " refrigerating " pro- cess {low cooling) does not keep. That may be Prof. Arnold's way of testing the value of a dairy process, but it will certainly not do for us. Nobody knows who made this butter, no cMie knows wiietlier all the other details of good butter making had been properly attended to. Before instituting com- paraisons of this kind " scientists " like Messrs Arnold and T.ynch, should obtain accurate scientific data, upon which to base their conclusions. Conclusions — !l — drawn from hearsay evidence are of no scientific f',^ "> h s tlieory, ,t ,s evident tliat he is far from followmg the strictly scientific method, and if we i Z from art,c es lately published in the American ."es^ the fuu" '''■ ^™"'^ °" '^"y ■— '» of vei; Xi ^^We quote fron. " American DairynKuV March x3th, ' " Mr. Arnold is the man of all men, who has brounhl ^J«' A.; m«fo.. a slaumenl about ihc clairu there h alx^ays a lustory attached to his soienti/lc eJn^aZJ-' 111 the same article the writer continues : I to/. A) Hold to rise and cx/)lain." ^^ Again in the same number of the " Dairyman " we statement ,n regard to low temperature fs an cho o^ ":nrLrsrss:" '" ^- -- - - --^ -■. This is more than sufficient to prove that it would not ^be safe to accept Mr. Arnold's theory, as bei^ ;^. 10 i . Now kt us see what Prof. Sheld(jn lias to say on the subject : "/; mw.s7, hoircvrr, br hornr In mind that huttcv made from cream llint has been raised in refrigerators will not heeo so well as if the cream had been raised at a temperature near to that in ndiicfi tlir butter unit be afterwards placed, ff^ /or instance, the cream is rai- sed at 4;*)'^^, and the batter is h''pi at 55^. decay null sooner set in than if the ct cam liad been raised at 50-' to 5o'\" — Sheldon. '-''In the ice-water systems \rhelher the cans be sub- merged or merely set in it to a depth equal to that of the milk.^ there can hardly be two opinions as to the cream being too thin — that /s, having too much of the sldm-milh with it.'' — '•^The cream in the ice- water system does not separate so perfectly from the milk as it does in ordinary shal- low-pan setting — probably.^ in part., on account of the diminished surface of the milk — bat it all rises into the upper portion or layer of milk ^ and remains there in- termixed with more or less of the milk : is softer., more liquid^ and thinner than cream that has risen in the ordinary way. This appears to be the usual result of deep setting., whether the milk be cooled in ice-water or not : and taere would seem to be little advantage in cooling milk in ice-water in the cold weather of "winter. The advantage of .such cooling lies in keeping the milk quite free from sourness in the hottest weather. The thinness of the cream in the deep-setting system is by some regarded as a disadvantage., and by others not : ~ II — these say Ihut it cfmnis Ike better for helwi lli'm, tliosc that it does not.'' —Sheldon Although a scientist of liigh rci)utc, Prof. Sheldon is a theorist, and certainly not a practical butter maker. His last sentence proves it. Why did not Mr. Sheldon ascertain the relative value of the two theories on tlie churning of thin and thick cream by actual experiments. If for any cause, Mr. Sheldon was unwilling to make the ex eriment himself, there was, and is, a very easy way of settling the difficulty. Mr. Sheldon could have appealed to the experience of some recognized authority in practical butter-making. For instance to the Danes, who are recognized even by him as the best practical butter-makers. What do we find the Danes doing in regard to this question ? They obtain the cream " very thill'' by the sivartz or low cooliny system. Even then it is not " thin enotujh" for them. They make it still thinner by adding from 25 to 30 "/q of sweet milk. This I have seen done, and practiced it myself, while studying butter-making in Denmark. Has the correctness of Mr. Lynch's theories in regard to "/oI'/rA- TION, mais il paruit pcu favorable a cclU* des l)euries lins (non sal^s) destines a la consomtiiation dc talde, nous allons essayer a le demontrer.'' '* La Initerie " de Pnuriau, paj^c 156, edition de 1881. •* ActuellLMnent, Ic grand dehouchedes lK,'urres dan(»is et siiedois, reside di.ns •' rexportation," et 11 n'est pas doutciix me ces beurres sal^s soient Ires estinies siir les j»rands marches des deux mondes, parce qu'il e.t reconnu que les beurres prepares par cetle nouvelle nietliode sont susceptibles d'une plus i^rande conservation. '• La laiteri** " de I'auriau, pnge 156. *' Mais de la grande extension que le commerce d'exportation des beurres a prise en Suede, surtout au Danemark, faut-il con- dure, a la superiorite de ces memes l)eurres sur ceux fabriques en France et destines a la grande consommation ? Nous n'h(Jsitons pas a repondre negativement, et voici pourcjuoi : '" 1. II n'y a pas de comparaison possible a etablir entre les nieil- leurs beurres du Danemark et nos bons beurres fran^ais, parce que les premiers, au sortir de la baratte, sont immediatement sales a une dose de sel qui varie entre 4 et 6 pour 100, suivant la saison, tandis que les notres arrivent non sales sur les marches. '• La Laiterie " de Pauriau, page 156. 2. La consommation de beurre frais, sans sel, parait etre une chose a peu pres inconnu^ dans les pays du nord, tels que le Dane- mark, la Suede, la Norv^ge, et une partie de I'Allemagne ; tandis qu'en France, en Angleterre, en Belgique et en Autriche, etc., on fait grand cas des beurres frais non sales." *♦ 11 resulte de cette difference qu'en France, nos ]iroducteurs s'appliquent a obtenir dans leurs fermes un beurre destine h la con- sommation de la table, ou aux usages culinaires, et dont les con- sommateurs apprecient la valeuren raison de sonarome, sa saveur, sa consistence, etc , etc. Dans le nord de TEurope, au contraire, on fabrique des beurres sal^s, destines suitout in I'exportation et dans lesquels, les qualites 17 - qui font le me rite de nos bons beunes fran^ais sont detruites on masquecs et reniplacecs par unc seule, el niitic quality, LA KE- SISTANCK AU KANCISSEMKNI'." "La Laiterie " (le rauriau, pajjje 157. " Quant h ces dorniers (hcmres sales), ce sont ceux du Daneniark et de la Suede qui atteij^nent les plus hauts piix moyens, viennenl ensuite ceux de la I'Vance, d'Allemngne, de la llollande, et enfin, avec une inTeriorlte de prix notable, ceux du Canada et des Ktats-Unis. La plus-value etablie sur les marches d'An'jlete re par les beurres danois et suedois deniontre une fois de plus que ces beurres prii'pares si)dciaiement en vue de Texportation (par Ir Systeme swart/) sont tre> apprecies dans ces pays, el surlout en raison de leur resistance au rancissement." *• La laiterie " de I'aunau, pa^^e 227. Depuis 15 Ji 18 ans, 11 s'est forme, en Suede et en Danemark, de puissantes compagnies d'exportation de beurre sale, non seulemenl en Angleterrc, mais aussi dans rAmeri(iue du Sud, et jusque dans I'extreme Orient. Parmi les grandes conq)agnies fondees pour I'exportation des beurres sal^s, nous citerons plus specialement celle de Husk, fds ^S-^ Cie , dont les ateliers et la machinerie j^ermettaient en 1877 (^e meltre journellenient en boite 20,000 lbs de beurre destine p0 — That M Lynch should have made a serious mistake on this question o\' ^* arnuia " is not surprising, b •cause scientists of good rei>ute liave fallen into the same error. DKNMARK'S SUCCKSS IN lirirKKM AK INC;. In speaking of the best butter nuiktis, Mr. Lynch says, at page 34 of his i)amphlet : " First are the Danes who are perhaps more success- ful than others," says Prof. Sheldon. " They study the principles of their art, which are propounded to them by scientific teachers, and they follow out the most api)roved systems, and adopt the most modern utensils." 'J'he real imi)roven)ent and })rogress of the butte- industry of Danemark dales from the time of the intro- duction of the "Swart/ or low cooling" syntem of skimming milk in that country. It was first introduced a little* before 1869. In 1872, Prof. Segelcke is found reco mending it as the best sy tem for the i)roduction of the finest and best keeping butter. In 1875, the agricultural commission of Jutland, Denmark, offered a number of prizes to the best kef>t ** ice or cold water ' dairies, and als6 some pecuniary encouragements for the best essay on the subject of skimming milk by the '' low cooling " system. In 1877, at the International Exhibition of dairy pro- ducts in Hamburg (Germany), the largest quantity ot finest and best butter was found in the Danish and Sweedish exhibits. It is a well known fact that the — il — c error. KINC. T.yncli lUCCCSS- iidy the :hcni l)y :>proved ; buttc- le intro- ;tem of n 1872, lie best ceeping utiand, St kcf)t iiniary )ject of ry pro- itity ot sh and lat llie Danes and llie Sweedes use mostly the *' Swartz or low cooling" system of skimming milk, (i) In 1879, at the International Exhibition of. London, England, in the butter class open to the world, a Dane, from Th'sted, Jutland, took the first prize. In i8eraturf weather I down r which slowly erature \in will ith the enable cooling I done Ik^ the 'ep the a par- y good t alto- perfect e milk bitter- sinter^ is of a careless or othcncise incompetent person for if carried too far the delicate /favor of the batter is liable tc hr dissipated, and if the after cooling is not careftifly finislu'd, the inilk is apt to turn sour.'' (i) Though no believer in this method for l)iitter-makini,^ on the farm, I liave given the method as it should he iorted. The market for export butter is very large and increas- ing from year to year. '2nd. In this country, butter is made during seven months of the year only. Therefore, the butter made for the home market must keep as long, and even longer than that for export. 3rd. By modifying to a slight exte t the process of making good kctplnr; butter, a very aromatic butter, suitable for special tastes, can be obtained. Therefore, the methods, which should be adopted, are those that are considered the best fitted for the pro- duction o( fjOod keeping butter. What is the best system of skimming milk for the production of good keeping butter on the small farms of Canada ? I St. The highest practical authorities, have proved that the Swartz or " low cooling " system of skimming mi^ ., is the best adapted to the production of the largest quantity of finest and longest keeping butler, (i) 2nd. The same authorities claim, and with reason, that this system gives a more uniform product be- (l) For large farms and factories, there is a method superior to alii others, as far as quantity is concerned, and equal to the best with respect to quality. 1 refer to the contrifugal. For ^rnall farms, the '* low cooling " is undoul^tedly the hest. -.33 -^ cause tlie milk iu kept at the same temperature, all through the year. 3rcl. rt will keep the skim milk, in a hrtter rondilion longer than any other system. 4th. In a coiiitry like this any amount of ice or snow IS produced, every winter by nature, and costs but the storage. Consequently the system best adapted for the pro- duction of butter in the small dairies of Canada, is the swartz or low cooling system of skimming milk. (Deep settmg at 32° Fahrl.) NoTA— As a continuation of this work I shall soon publish in an other pamphlet, Prof. Fjord's experi- ments on the conservation of ice and also a complete description of the Swartz system. QUO'l'ATlONS FROM MR. LVNCH'S PAMPHLET. Note.— The pages given at the end of the quotations are the pages of Mr Lynch's pamphlet. Sf//wi: i» Closed Milk- Vessels. No. I. The advanlatre of a closed vessel is that the impurities in the atmosphere are excluded from the milk. IJut before milk i,e closed against the atmosphere and ventilation, in such a way that Its own impurities cannot escape, it is necessarv that the milk be purified. This may be done by aeration-exposing the milk to pure air, or by heating it, to expel or kill the germs. The advantage would be m favour 0/ heating, smce heating would more effectually purify the milk, and increase the range of falling temperatitre. -34- AlMation wmiM lower the tempenluie of the milk, which in itself is not 9s ^3j- tme before cooling lower. That is, it will he Iwtter to heat above 90** or loo**, than to cool lower than to 55*^. Ten deques abo7'e 100^ will gi-,'e more aa'Tantage to the process than ten degrees below 55^. I/oio high to heat before cooling below 55** // is not easy to saw Tlu* experience of the ()j)erator and ciicunist^^ices 7uill best determine. J 'he rule will be to keep, as far as possible, toil h in safe limits both in heating and cooling, and yet obtain for the process ifery necessary advantage from cooling and heating. If iiiakiiij^ Imttt'i fur a far market, ijive its nu'ltinp: point, or keeping,' (iiiality, tlu* l»t'n»-lit of any dtuila ; wlurli nuans to cool or heat less rather tlian more. — Cooling the milk. No. 4. The first part of the cooling', when the diflerence hetween the lem|)eratu e of the milk and the cooling agency is greatest, will he the most rapid. This is well, l)ecause t'le milk, if kept long at a high lemi)erature, will (juickly sour. Hut when the milk is down to from 7$*^ t(f 65" it is better to cool slo7vly ; that is, it is belter that the temi^erature should change slow'iy and \)q constantly falling than that it should fall too quickly and then stand unchanging ^\. its lowest poin.- Where air is depended upon as a cooling agency and is variable in temi)crature, it is not easy to accomplish this. The general rule given may be kept in mind. Whert heating or aeration is em- ployed, it is not so difficult to do. Where milk is heated to 120^ and above, and more or less of the germs it contained are killed, it will keep a longer time at high temperature and so be allowed to cool more slowly. Where the air of the milk-ronni is the cooling agency and it is high, say up to 70^, the advantages of heating l)efore setting would be greater. Aeration will cool the milk a few degrees and it will thus loose some of the advantage of the falling temi^erature, but it will allow the milk to be more slowly cooled afterwards. Avoid too low cooling. It will be found that keeping quality and *^ delicacy of flavour ^^ suffer from loxa* cooling. For this reason sp ing water or running water are better than ice, and the mode- - at) - rate employment of heat is desirable whenever it saves the neces- sity of cooling too low. — (Page 4.) lVnimin^ Up ami Coolhig. No. 5. Where the te .iperature has been lowered too quickly and to a very low point, it may happen that the cream has almost ceased to rise, and there is yei some cream held in suspension near the top, on its way up. This case may t>e met, if the milk-vessel is suitable, by apply ng heat— water or steam — at the bottom, and raising the temperature th few degrees. This warms the milk, and the cooling which follows sends up more cream. In this way the effects of a fixlling temperature are availed of indefinitely. The heating must lie done gradually^ not too fast, and only a few degrees, — 1 Page 4. ) IIoxv long Milk may Set. No. 6. The length of time that will be required to rise the cream will depfend on the means used in setting for cooling. Where ad- vantage is taken of the help of artificial heating or cooling, cream will rise in twenty four, or even twelve hours. Setting milk in the most primitive way it will require thirty-six or forty-eight hours to rie. Cream may be raised in twelve hours, without loss in quality, and with great gain in saving of time and labour.— (Page 4.) Teinperaiure, No. 7. The rising of cream is dependent upon temperature. A high tempc-iature is favourable to the rising of cream ; in a low temperature cream mo7>es sluggishly. A changing temperature, if it be a falling one, is most favourable for the cream to rise. The rapidity of change affects the quantity of pure cream. If it he too rapid, the quantity will be deficient—the quality of the cream will be thin and mixed with milk. The artificial heating or cooling of cream may be employed to produce good results, or the contrary.— (Page 14.) — 37- Effect on Quality, No. 8. Extreme temperatures are injurious to milk and \,< pro- duct. Milk may l,e heated too high or too Icn,, uol only for .Ln- nty but cjualUy, both eating and keeping ,jnality, of butter - (Page 14.) ^ y - . Milk-Setting -Depth. No. 9. A considei-ation of the effects of temj^rature is necessary to a rule for bulk, body, or depth in milk-setting. To get much ]>enefit from tempemture, the milk must not 1^ cooled too fast to get the full benefit of a falling temp.mture. On the other hand, if milk is cooled too slowly, it will sometimes sour before the cream h.s risen. Hcatmg may be employed as a me ms to at onee give a ':vider range of falling temperature and to make the milk keep I<>n<^er sweet while slowly cooling. Again, water may 1^ employed asm. agency for cooling, and its advantages will allow deej^r setting than could be practised where air is the c. ling agency Tl^e effects of temperature and the utilization of water as a'coolinrr agency will l^ more fully treated of in other and sepamte connec tion.— (Page 15 and 16.) Heating and Cooling Milk. No. 10. llie object in cream-rising is : /,-./, to separate all the cream from the milk ; second, to leave the skim-n.ilk sweet or in a condmon to be of highest value for use, feeding or cheese-making • third, to manage with little cost, time and labour ' These objects require mainly that the n.ilk be kept as long as ,x>ssible sweet, and that a wide range of falling tempe.-ature be 'r" e 16 ^^^ "'""'^ favourable conditions for raising cream. - Obtaitiinga Falling Temperature. No. II. A falling temperatui^ may be obtained by pdlowin.. the milk to set m an atmosphere colder than itself. This fall of tem> - 38-- perature is limited by the ordinary conditions under which milV is set. There is usually a considerable fall, say to 85** before the milk is set. ScBietimes the atmosphere of the cairy, or milk-setting room is at an unduly high temperature, say 60^ to 70*". There may be o btained in ordinary setting, therefore, only 15*^ or 25^ of fall. Artificial means may he employed here to increase this range of falling temperattae. Water, applied to the vessel containing the milk, may be used to cool the milh, more speedily and to a lower ten jerature than can be attained by air. Water is a better con- ducior of heat, it is in summer colder than the air, and always of a more unifcim temperature. By the use of water, tl erefoie, w?'//- may be artificially cooled to the end of obtaining a longei range of falling temferottire. Again, the milk may be heated up to its original warmth or higher, and then allowed to cool, or be cooled, thus giving a greater fall of temperature. Thus to obtain a falling tem- perature, the artificial means may be employed of heating and cooling, one or both. — (Page 17.) the the Safe Limits of Temfeiature. No. 12. Alilk viay be cooled to so low a temperature that it will cease to thiow up cream , and where it will have an injurious effect upon the colour, taste ana keeping quality of the butter. On the other hana there is a high tefnperature to which milk may be heated, that will have a marked imfavourable effect on the quantity of cream and quality of butter. The range of temperature between these two opposite points, is sufficient to make it no object to approach too near these unsafe limits, — (Page 17.) Changing Temperature, No. 13. The object of heating or ct oling milk, and causing it to pass through a range of different degrees of temperatwe, is not to improve the intrinsic quality of the butter. So far as th"" needs of the butter grain go, if the milk could be allowed to cool d^wn gra- dually to tef?iperate, 60*^ and remain there, nothing better could be \. / — 39 — asked. Any change of temperature before or afterwards, if it lias any effect on the butter, will be in the direction of the disorgani- zation of the butter grain, and unfavourable. 7^he object t'.at is had in view in securing a ividc range of temperature^ is for the mere sake of procesSy the obtaining of the creatn^ and aftenoards the butter Therefore the aim will be to\niakeas little change as possible to secure to the process the advantage of change, and to make that change where \\. will least affect the grain itself. It will also be the aim of the operator never to cause a change of temperature for the sake of advantage in the process that will do any marked injury to the quality of the butter. — (l*age 17.1 Safe cooling Limit. !^ \ o If No. 14. It is difficult from what seems at present known, to fix the safe cooling limit. A great deal has been said and written oj the good and evil effects of cooling that has not taken into account the 7vhole tjuestion as here presented. It is evident that the limi t must at least be fixed on the warm side of freezing or 32*". There arj two facts that will give a rule of operation. While in heating the advantages to process are increasingly less, the unfavourable effects on quality of butter are increasingly greater as the cooling goes on. The rule would be to stop between freezing and the lowest of the high temperatures that may be said to be absolutely necessary, — to stop as near as possible to the latter {^^^), and as far as possible abo7>e the former (32^). — (Page 17 and 18.) Safe Heating Limit No. 15. L he outer limii in heating for safety against market injury is short of scalding. There is in scalding milk risk of lessening the quantity of cream that will rise, and of injuring the quality of butter. It is doubtful if the effects of scalding are practically so unfavourable as those of freezing. Butler made from whey that has been heated to 170*^, to cause the cream to rise quickly, is a l^etter article than l:>utter made from whey that has been cooled (juickly down to 60**. — 40 The practice has bem followed of scalding not only viilk^bitt cream. If ivhcy and cream stand so hi^h heating, milk will stand it better. It ivould appear that a safe limit 7vould be found any- 10 here shoit of scalding. To say that such a temperature would be a safe limit, does not mean that it would be an object in ordinary cases to heat to that degree. Ordinarily there would be no neces- sity for approaching that r iiperature, as a lower temperature •would usually serve all requirenients. If, however, there are any defects in the milk that cannot be cured at a lower temperature, it would be well to avail of the advantages of heatings and to approach scalding. For instance, flecks in butter are cured by heating ; the butter would be worse with the flecks than witb the high heating neces--ary to cure the defect. — (Page l8.) Heating vs. Cooling. No. l6. Heating milk before setting gives a voider range of fall- ijig ten;pcraiure ; it destroys germs in the milk^ and tvill alloxo it to stand at a higher temperature, for a longer timey before souring. Heating cures some defects that low cooling only imperfectly pro- vides against. Heating purifies the milk, and makes it of more value because of its purity, besides affecting the process. Cooling milk is necessary, whether heating is adopted or not; and slow cooling, by what may be called artificial means, or by the application of water, to get the best results, is desirable. But fast or lo7v cooling, ivhile not necessary, is of questionable value. The special advantage cooling has over heating is that if cooling, which is necessary in any case, can be employed to make previous or artificial heating unnecessary, the labour of artificial 1 eating is avoided. Tlie italics in all of Mr. Lynch's quotations are ours). — (Page IQ.) ^ ^ "* S. M. BARRfi. The End- .// -41 — BURMEINSTER & WAIN'S IMPROVED DANISH MILK SEPARATOR. This separator was awarded two gold medals (one in class A separators for two horses, and the other in class B or separators for one horse) at the Aalborg Centrifugal Milk Separators Exhibition, and also a silver medal at the last St. John, N. B., exhibition. In each case it had to compete with De Laval's Milk Separator. The lar-e size A machine requires lyi horse power to run it, and will skim 1,200 lbs. of milk per hour. The B size requires 0.88 horse power and will skim 700 lbs. per hour. A summing up of the result of the Aalborg and Vestervig competition may be described as follows : 1st. With the same completeness of skimminsc and the same quantity of milk per hour, De Laval's se^para- tor requires one-third more power. < — 42 — 2nd. With the same completeness of skimming and the same consumption of power, Burmeinster & Wain's small B separator skims, one-third more milk than De Laval's. 3rd. With the same quantity of milk, worked per hour, and the same consumption of power, De Laval leaves from 64 to 65 per eent. more fat in the skim milk. Table showing the relative maximum capacity of the Burmeinster & Wain and the De Laval se])arators, and the amount of motive power required to drive them : TAKEN FROM PROF. J. N. FYORD'S REPORT. • Capacity. Conij lete- ness of skimming. Speed. Motive power required. Lbs. per hour Fat left in the skim milk. Revolu- tions per minute. Horse power. T aval's Separator Burniein.stcr & Wain's (small size) hiunneinsler & Wain's (large size) . . 700 700 I,200 0.29 0.30 0.25 7,000 3,000 2,000 1.20 0.88 1.50 Particulars sent free by addressing H. C. PETERSEN & CO., P. O., box 1379, Montreal. For S. M. Barre's Essay on W. H. Lynch s work on butter-making, address iMessrs. H. C. PETERSEN & CO., ^- Om box 1379, Montreal. Price, 25 cents. TABLE OF CONTENTS. I f I 1. Mr. Lynch's theories 3 2. Defects of Mr. Lynch's theories 4 3. Effects of low cooling on the keeping quality of butter .*. 6 4. Effects of low cooling on the aroma (flavor) of butter 18 5. Denmark's success on butter-making 20 6. The heating of milk 22 7. The true doctrine on the subject of Skimming milk on the small farms of Canada in the small dairies, or dairies of from 5 to 20 cows. 31