lODO EXPERIMENT STATION RECORD. 



most (lavH Ih'Iow .'5 \>vv (viit. Jl is uoIimI tlial similai' rcsiills liavc Ih-cm ()l)taiii(Ml with 

 other he-nls in (liffcront i)arts of the f(tuiitry. 



Data are j;iveii on the effects of sexnal excitement on the yield and (jnaHty of milk, 

 anil (ihservations upon the intluence of weather conditions on milk ])roduction are 

 also rc]i(Mlcd and discussed. It is stated that a chanj.^^ from an equahle to either a 

 deci(U'<lly low or a decidedly hij,di temperature tends in the majority of cases to 

 decrease the fat content of the milk. 



Milk records, J. Spkik (Trims. lli(/hluii.(l (md Agr. Sue. iScotl(ind,5. ser., IG {1904), 

 pp. 170-'J'J9, Ji(/ii. 3). — T\w lli<j;hland and Agricultural Society, in cooperation with 

 local associations, conducted tests of 11 herds in Ayrshire, 11 in Dumfriesshire, and 

 VI in Wigtownshire. The i)rincii)al ohject of the work was to compare the productive 

 capacity of the individual cows in each herd rather tlian to compare one lierd with 

 another. In all, 1,342 cows helonging, with one or two exceptions, to the vVyrshire 

 ])reed. were tested. The records, which cover a ])eriod of (j months, are re]»ortcd in 

 detail in tahular form. 



During the 6 months the best cow jiroduced 731 gal. of milk containing 4.02 per 

 cent of fat. The 90 most profitable cows produced on an average 545 gal. of milk 

 containing 3.84 per cent of fat, and the 90 least profitable cows, 318 gal. of milk con- 

 taining 3.5 per cent of fat. The cows were classified as small, medium, and large. 

 The small cows averaged 420 gal. of milk containing 3.62 percent of fat, the medium 

 cows 441 gal. containing 3.69 per cent of tat, and the large cows 464 gal. containing 

 3.53 per cent of fat. 



The average production of 903 cows grouped according to age was as follows: 

 Thirty cows 2 years of age, 362 gal. of milk containing 3.83 per cent of fat; 147 cows 

 3 years of age, 377 gal. of milk containing 3.87 per cent of fat; 164 cows 4 years of 

 age, 403 gal. of milk containing 3.76 per cent of fat; 137 cows 5 years of age, 421 gal. 

 of milk containing 3.66 per cent of fat; 110 cows 6 years of age, 438 gal. of milk con- 

 taining 3.63 per cent of fat; 88 cows 7 years of age, 465 gal. of milk containing 3.63 

 per cent of fat; 80 cows 8 years of age, 468 gal. of milk containing 3.69 per cent of 

 fat; 50 cows 9 years of age, 461 gal. of milk containing 3.63 per cent of fat; 36 cows 

 10 years of age, 457 gal. of milk containing 3.64 per cent of fat; 28 cows 11 years of 

 age, 464 gal. of milk containing 3.60 per cent of fat; 16 cows 12 years of age, 493 gal. 

 of milk containing 3.48 per cent of fat; 10 cows 13 years of age, 428 gal. of milk con- 

 taining 3.42 per cent of fat; 3 cows 14 years of age, 375 gal. of milk containing 3.56 

 per cent of fat; 3 cows 15 years of age, 406 gal. of milk containing 3.39 per cent of fat; 

 and 1 cow 18 years of age, 471 gal. of milk containing 3.74 per cent of fat. 



In a large number of cases where the intervals between milkings Avere equal, the 

 at content of the evening's milk averaged slightly higher than that of the morning's 

 milk, though the difference was small and considered almost within the limit of 

 ex])erimental error. 



Official tests of dairy cows, 1902-3, F. W. "Woll ( WUcons'm Sta. Bid. 107, pp. 

 43, fgfi. 21). — This bulletin contains a brief account of the testing of dairy cows by 

 the station since 1886, a descrii:)tion of the method of making official dairy tests 

 which have been conducted since 1894, a comparison of different systems of testing 

 cows, rules regarding the conduct of official tests, and detailed data for tests of over 

 200 cows representing Holstein, Guernsey, Jersey, and Red Polled breeds. Illustra- 

 tions are given of many of the best cows tested during the year. 



The average production of the Holstein cows in 7 days was as follows: Cows 5 

 years old and over (65 tests with 55 cows), 420.4 lbs. of milk and 14.507 lbs. of fat; 

 cows 4 years old (23 tests with 20 cows), 400 IIjs. of milk and 13.941 lbs. of fat; cows 

 3 years old (32 tests with 29 cows), 369.7 lbs. of milk and 12.621 lbs. of fat; cows 2 

 years old (39 tests with 36 cows), 279.8 lbs. of milk and 9.697 lbs. of fat; and cows 

 below 2 years of age (12 tests with 11 cows), 252.5 lbs. of milk and 8.403 11)S. of fat. 



During the year comparisons were made of the results obtained by the system of j 



