DATRY FARMTNfi DATRYTNG. 677 



an emulsion in the form of whole millv was superior to nonemulsified fats, 

 which iiecords with his exjierieuee as i)reviously noted (E. S. R., 19, p. 470). 



The university dairy herd, 1908-9, (i. C. Humphrey and F. W. Woll (Wis- 

 eonsin »S7«. Bui. 187, pii. 3-i2, figs. 3). — This bulletin presents data relating to 

 the feed consumed and milk produced by the station herd during the year end- 

 ing May 11, loot). 



The results obtained with the individual cows are discussed with reference 

 to the value of the rations fed for milk production. Twenty-five cows averaged 

 during the year 8,4.39.0 lbs. of milk and HO.3.62 lbs. of butter fat. If an 

 average of the actual prices received for butter fat and the prices paid for 

 feed be taken, the average value of their product would l>e ,$111.70. the cost 

 of feed eaten .%n(».34, and the average net profit .$01.42. The winter grain 

 ration used consisted of wheat bran, corn meal, and distillers' grains in the 

 proi)ortion of .3 : 4 : .3. Small amounts of oats, oil me:il. and brewers' grains 

 were fed occasionally when tlie cows needed variety. 



The feeding shows that cows which are higli producers can consume large 

 amounts of dry matter containing as high as 2J lbs. of digestible protein 

 daily and use their feed economically, while cows that are advanced in lacta- 

 tion and are low producers must feed less grain and cheaper feeds if they are 

 to yield any profit. Tlie 7 cows in the herd which pi'oduced more than li lbs, 

 of butter fat iier day during the winter period consumed on the average 17 

 lbs. of dry matter and 1.02 lbs. of digestil)le protein for each i)ound of butter 

 fat i)roduced. The cows which made less than f lb. of butter fat per day 

 consumed on the average 80.9 lbs. of dry matter and 2.33 lbs. of digestible 

 protein per pound of butter fat produced. 



The average production and net profit of the herd during the last 6 years, 

 as estimated on the basis of 27 cows which pi-oduce an average of 7,454 lbs. 

 of milk containing 315.7 lbs. of butter fat, was $85.49 as a value of total 

 products less .$37.70 total cost of feed, leaving a net profit of $47.79 per cow 

 per year. The net prf)fit returned last year was the highest since the herd 

 was established 11 years ago. 



The chemical composition of milk, .7. dk Bb6vans {Hyg. Viande et Lait, 

 3 (1909), No. 12, pp. 593-61H). — A summary and discussion of variability in the 

 chemical composition of milk. Tables of analyses' are given to show the varia- 

 tions due to individuality, breed, period of lactation, and other factors. 



On the formation of milk sugar, C. Porcher (Biochem. Ztschr., 23 (1910), 

 No. 5, pp. 310--'iOU figs. 12). — The removal of the mammary glands of goats 

 and cows, either before or after parturition, induced glucosuria and was accom- 

 panied by hyperglucohemia. Injections of phlorizin in lactating animals pro- 

 duced glucosuria. From these experiments it is thought that lactose is formed 

 from glucose in the blood as it cii'culates through the mammary gland, and that 

 on the removal of the gland this glucose is excreted in the urine. 



Further investigations on the influence of stimulating substances on milk 

 secretion, G. Fingerling (Landw. Vers. Stat.,71 (1909), No. 4-5, pp. 373-41/t).— 

 A continuation of work previously reported (E. S. R., 19, p. 778). Fennel, 

 malt sprouts, coconut cake, and palm-nut cake, which are rich in stimulating 

 substances, were contrasted with starch, peanut oil, and other feeds which 

 have no stimulating effect. The basal ration was hay, from which the aromatic 

 and stimulating material had been removed by steeping. Two new milch goats 

 were used and the feeding periods lasted 15 days each. 



The author concluded that of the feeds tested malt sprouts, palm-nut cake, 

 and coconut cake contain substances which exercise a stimulating eftect on the 

 mammary glands independent of the form of digestible nutrients contained in 

 the feeding stuff. In the case of one goat the average daily yield of milk on 



