DAIRY FARMING DAIRYING. 1159 



DAIRY FARMING -DAIRYING. 



Investigations on the influence of proteids upon milk production and on 

 the relation between starch value and milk yield, A. Mougkn, C. Beger, 

 and F. Westhaussek {LuikIic. IC/.s-. ,stiit.. (id {1901), No. 1-2, pp. 63-165). — lu 

 experiments with 10 sheep and 1 goat the authors studied the effects of increas- 

 hiK the daily allowance of digestil)le protein from li kg. to 9 kg. iu rations con- 

 taining different amounts of fat. 



The results showed that an increase in the amount of protein was followed 

 in most instances by an increase in the yield of milk and milk constituents. 

 The i»ercentages of fat and total solids in the milk, however, were decreased. 

 The increase in the yield of milk due to the feeding of more protein was most 

 marked when the fat content of the ration was 1 kg. per 1,000 kg. live weight. 

 The decrease in the fat content of the milk was more marked when the fat in 

 the ration was low than when it was normal or high. A large amount of fat in 

 the ration increased apparently the yield and fat content of the milk. 



Rations having the same starch value exerted the same influence upon milk 

 liroduction only when the amounts of protein and fat necessary for a maximum 

 production were present. 



The effect of feeding cows rations rich and poor in proteids, A. Schmeck 

 (///M.S'. Luiiihr. /J<i., 27 (t!)(l7). No. Jfl, pp. SlS-Slo). — In ex[ieriments with 2 

 cows a comparison was made of rations containing 2.25, 1.58, 1.21, 0.8;', and 

 0.50 kg. of digestible protein per 1,000 kg. live weight. The corresponding 

 nutritive ratios w.ere 1 : U, 1 : 9, 1 : 12, 1 : 18, and 1 : 30. When less than 1.21 kg. 

 of digestible protein was fed daily there was a decided loss in live weight. The 

 ration richest in protein was the most favorable for milk production. 



Influence of feeding beet leaves and tops upon the composition of butter fat, 

 'SI. Siegfelo {Ztsclir. I'utcrsuch. Nahr. ii. GcnussmtL, 13 {1001), No. 9, pp. 513- 

 52-'i). — During the feeding of beet leaves and tops to about 40 cows for over 2 

 months the Reichert-Meissl, Folenske, and saponification numbers were high 

 and the iodin number and the average molecular weight of the nonvolatile fatty 

 acids Mere low. 



Influence of feeding on the composition of butter fat, C. Ambergeu {Ztschr. 

 IJ liters ticlt. Nuhr. n. Geiiussnitl., 13 (1901), No. 10, pp. 61Jf-621). — In experiments 

 with 2 cows, feeding a ration rich in sugar was without influence on the proper- 

 ties of the butter fat. A ration richer in protein than that ordinarily fed, how- 

 ever, decreased the Reichert-Meissl number from 25.48 to 16.70, the Poleuske 

 number from 1.8 to 1.6, and the saponification number from 225.5 to 219.5, and 

 increased the iodin number from 32.1 to 39.2. 



The dairy cow, J. S. Mooke {Mississippi Htu. Bill. 95, pp. 23, figs. 5). — This 

 bulletin deals in a popular manner with the principal dairy breeds, the selection 

 of cows, the keeping of dairy records, testing milk, dairy feeds, feeding standards, 

 calculating rations, pastures, soiling crops, care of cows, raising calves, and 

 other topics. The difference in individual cows is illustrated by the average 

 records of 2 cows for 3 years. One produced 5,003 lbs. of milk and 294 lbs. of 

 Initter at a cost for feed of $34.20 a year, and the other produced 5,725 lbs. of 

 milk and 428 lbs. of butter at a yearly cost for feed of $30.44. A table is given 

 showing the di-y matter and digestible nutrients in feeding stuffs. Ten suitable 

 rations for dairy cows are included. 



Records of dairy cows: Their value and importance in economic milk 

 production, C. B. Lane {U. S. Dept. Agr., Bur. Anim. Indus. Rpt. 1905, pp. 

 111-1J,6, pis. 1, figs. 6; Circ. 103, pp. 38, figs. iO).— Largely an abstract of Bulle- 

 tin 75 of the Bureau previously noted (E. S. R., 17, p. 093). 



6871— No. 12—07 5 



