DAIRY FARMING 



-DAIRYING. 



907 



Othor cauwcs <>f iiiiuor iiuportuuce, .sucli as foml, teui])eruture, unequal intervals 

 between niilkings, etc., were nientioneil. Jn tlic present paper data are also given 

 sht)wing variations occurring during the j)eriod of heat. In the winter the decrease 

 in yield per month was about 5 per cent; in the summer it was nearly 10 per cent. 

 In general the fat content of the milk increased as the yield decreased. In July 

 there was a decrease in the solids-not-fat in the milk of every cow. While the fat 

 and solids-not-fat were frequently below the standard in the case of individual cows, 

 this was not true of the mixed milk of the 5 cows in any instance. 



The mineral constituents of co'ws' milk and their variations during the 

 period of lactation, A. Trunz {Ztacltr. Physiol. CJwin., 40 {1903), No. 3-4, pp- 

 J63-3I0). — The author reviews the literature concerning the mineral constituents of 

 milk, and reports determinations of the total ash and the different ash constituents in 

 the milk of 2 cows at frequent intervals during the entire lactation period. Deter- 

 minations were also made of the specific gravity, fat, total proteids, casein, albumin 

 and globulin, and milk sugar. 



Cow No. t)55 was 31 years of age at the beginning of the lactation period, which 

 lasted from Decend)er 25, 1901, to Novendjer 8, 1002. Cow No. 074 was 7h years old 

 at the beginning of the i)eriod, which lasted from January 14 to Decendjer 0, 1902. 

 The course of lactation in both instances was considered normal. The accompany- 

 ing table shows the total ash and the different constituents by months for each cow. 

 In the percentages for pure ash as given in the tal)le, deductions were made for the 

 sulphuric acid and the i:)hosphoric acid derived from the phosphorus of the casein. 



A.sJt analyses of the inillc of tiro cows. 



Cow No. 655: 



Colostrum i)L'riod 



Jamiary 



February 



March 



April 



May 



July 



August 



September 



October 



Cow No. 671: 



Colostrum jieriod 



.Tanuary 



February 



March 



April 



May 



July 



August 



September , 



October 



November 



December 



Per ct. 

 11.67 

 11.89 

 12. 82 

 13.02 

 12. 52 

 10. 62 

 13.13 

 16.97 

 14.31 

 13.01 



14.70 

 14.10 

 14. .59 

 15. 77 

 16.37 

 17.75 

 17. 75 

 20. 82 

 20. 21 

 20. 08 

 21.32 

 27. 15 



Per ct. 

 25. 66 

 24. 56 

 24. 26 

 24. 82 

 24. 18 

 26. 05 

 25.23 

 22. 03 

 23. 10 

 22. 85 



24.60 

 24.24 

 24.88 

 25. 18 

 2.5.21 

 24.01 

 23. 30 

 22. 63 

 22. 48 

 22. 08 

 20. 44 

 17.13 



The influence of feeding' stuffs on milk secretion and. on the composition of 

 milk, O. Lemmek.mann and G. Linkh {Landw. Jahrb., 32 [1903), No. 4,PP- 559-6 J5). — 

 In a review of the literature of this subject the authors found very little of a positive 

 nature as to the existence of a feeding stuff having a specific influence on milk secre- 

 tion. All the experiments which have indicated such an influence cannot be looked 

 upon as conclusive, according to the authors, on account of the manner in which the 

 experiments were made. 



Exj)eriments with 4 cows were conducted for the jjurpose of determining if such 

 an influence could be ascribe<l to palm-nut cake, cocoanut cake, l)rewers' grains, and 

 a mixture f)f ecpial parts of anise, fennel, juniper, and caraway. The basal ration 

 consisted of feeding stuffs not believed to have any specific influence on the yield 

 and composition of milk. In all cases the rations contained the same amount of 

 digestible matter. 



