374 



EXPERIMElSrT STATION BBCOED. 



The fat content of milk at different stages of the milking, after incomplete 

 milking, and in the milk remaining in the udder after the calf has taken some, 

 H. Isaachsen, A. Lalim et al. (pp. 48-70). — Trials with several cows showed 

 that the fat content of the milk increases gradually and slowly at first during 

 the milking, while toward the end the increase is very rapid. The first drawn 

 milk generally contained less than 1 per cent fat and the last drav^n from 

 10 to 11 per cent. If a portion of the milk is left in the udder, the fat content 

 of the first drawn milk in the next milking is not higher than is ordinarily the 

 case, and there was no indication that the fat which is supposed to have been 

 held back in the udder until the end of the milking reappears in later milkings. 



There was no indication that the calf preferably gets the richest milk, as 

 the fat content of the milk obtained after the calf has taken about half of the 

 milk increases in the same profxjrtion as when the milking is wholly done by 

 hand. There was no appreciable change in the percentage and amounts of 

 solids-not-fat in different parts of the same milking. 



Maize distillery residues as a feed for milch cow^s: Influence on the 

 composition of the milk, I. Weiser (Koztelck [Budapest], 22 (1912), No. 83, 

 pp. 2S62, 2863; abs. in Intemat. Inst. Agr. [Rom-e], Mo. Bui. Agr. Intel, and 

 Plant Diseases, 4 (1913). No. 2, pp. 267-269). — From experiments carried on 

 in 1912 at the Royal Chemical Experiment Station at Budapest it is concluded 

 that "feeding large quantities of wet distillery residue does not affect the 

 composition of the milk enough to have any importance in practice." The 

 specific gravity and refractive index of the different periods of wet and dry 

 feeding showed very little change, and the fat content remained practically 

 the same. 



The utilization of Sudan durra (But. Imp. Inst. [So. Kensington], 11 

 (1913), No. 1, pp. 33-46). — Experiments in testing the nutritive value of 

 " Sudan meal " as a feed for dairy cows indicated that it compares favorably 

 with " maize meal," the yield of milk and percentage of milk fat being 

 practically identical. 



On the relation of the body weig'hts of dairy cows to their production, 

 F. W. WOLL (Proc. Soc. Prom. Agr. Sci., 33 (1912), pp. 23-28).— In a con- 

 tinuation of work previously noted (E. S. R., 28, p. 74) the author presents 

 data on the average yield and cost of production for 355 cows of body weights 

 ranging from imder 900 to over 1,400 lbs. The records were obtained from 

 over 50 different farms and dairies and included 145 Holsteins, 75 Jerseys, and 

 135 Guernseys. The relation between the body weight and the average yield 

 of milk fat is shown in the following table, in which the various data are 

 calculated as percentages of the. results found for cows weighing 900 lbs. and 

 under : 



Relation of the production of dairy cows of different body weights, calculated 



as percentages. 



