880 EXPERIMENT STATION RECORD. 



beets per 1,000 kg. live weight. The grain feeds tested were rape cake, 

 linseed meal, peanut cake, cotton-seed meal, sunflower meal, poppy cake, 

 cocoanut cake, palmcake, dried brewers' grains, wheat meal, oatmeal, rye 

 meal, corn meal, barley meal, wheat bran, rye bran, molasses and palm 

 cake (1:1), and malt sprouts. With one lot the feeding commenced with 

 the various meals and ended with the oil cakes, etc., and with the other 

 the oil cakes were fed first. The periods were only 10 days each, except 

 in 2 cases, with no transition periods intervening. Only the last 5 days 

 were considered in studying the effect of the food. The rations usually 

 contained about 2 kg. of digestible. protein per 1,000 kg. live weight, 

 although in a number of periods the amount dropped to 1.5 kg. and 

 even lower. Consequently the nutritive ratios ranged from 1:0.5 to 

 1:12.4. The cows were weighed every other day and the yield and 

 composition of the milk determined daily. The detailed data are 

 tabulated. 



The cows at first refused to eat the rye meal, but on the fifth day of 

 the period commenced eating small amounts, the maximum consump- 

 tion being about 12 kg. daily per 1,000 kg. live weight. The case was 

 similar with rye bran, of which only 8.73 kg. was eaten. 



The author found no relation between the fat content of the milk 

 and the amount of fat contained in the rations, as has been suggested 

 by Soxhlet (E. S. E., 8, p. 101G). 



The author groups the feeding stuffs tested under three heads — those 

 advantageous, those disadvantageous, and those indifferent in their 

 effect on milk production. Among those advantageous to milk produc- 

 tion were the mixture of beet molasses and palm cake, barley meal, 

 malt sprouts, linseed meal, corn meal, wheat bran, and oatmeal in the 

 order named. The mixture of molasses and palm cake had the greatest 

 effect of any food on the solids and fat content. It was only disadvan- 

 tageous to the increase in live weight. It is thought this may be due 

 to the effect of the molasses on the kidneys, as suggested by Hagemann 

 (see above). Barley meal was found a desirable food in every respect. 

 On coru meal the yields of milk, solids, and fat were high, although 

 the percentage of solids and fat was not noticeably high. 



Among those disadvantageous to milk production were cocoanut cake, 

 poppy cake, sunflower meal, peanut meal, cotton-seed meal, and rye 

 bran. With cocoanut cake the results were unfavorable in almost 

 every respect, due possibly to the fact that the animals ate only about 

 half the amount which it was intended to give them. Poppy cake 

 ranked poorest of all in respect to the fat and solids, both the percent- 

 age and the total amount. Sunflower meal, while not especially unfa- 

 vorable, did not give satisfactory results. The peanut meal was 

 especially disadvantageous to the content of solids and fat, while the 

 yield of milk was only a little below the average. The same was true 

 with cotton-seed meal, and in case of 2 of the cows inflammation of the 

 udder was noticed. (About 3.0 kg. of cotton-seed meal per 1,000 kg. 



