FOODS ANIMAL PRODUCTION. 



71 



was fed also, the amount being- increased until on the sixth day the 

 animal received 250 gni. On the fifth day the animal was in nitrogen 

 e(]uilil)rium. On the sixth and seventh days 4.G5 gm. of nitrogen was 

 excreted in the urine and 0.8G gm. in the feces, about three times as 

 much as in hunger. Undigested rice could be identified in the feces. 

 The nitrogen required was only sixth-seventlis of that excreted during 

 hunger. 



The author conchides that when a large amount of carbohydrates 

 and little protein and fat are fed the protein consumption sinks far 

 under the typical hunger mininmm. 



The formation of fat from protein in the animal body, M. Kuma- 

 GAWA and G. Kaneda {Mitt. med. Few. d. I: Jap. Univ., ToMo, 3 {1895), 

 No.l,2).li; Centbl. Fhi/.siol, 9 {1896), pp. 731-723; ahs. in Chem. Centbl, 

 1896, I, No. 13, p. 719). — Two dogs of the same litter were made to fast 

 for 24 days. The nitrogen in the urine was determined daily. One 

 dog was then killed and the fat in all the organs determined. This 

 dog weighed 11.55 kg. at the beginning of the fasting period and had 

 lost 82.88 gm. in weight. The total nitrogen in the flesh of the animal 

 was 519 gm, and the total ether extract 115.5, 



The second dog weighed 9.04 kg. at the beginning of the fasting 

 period and at the end 6.08 kg. It was calculated that the fat content 

 of this dog was 120 gm. The dog was fed meat for 50 days, the ether 

 extract, glycogen, nitrogen, and water in the meat being determined, 

 and the nitrogen in the urine and feces. The dog was killed and the 

 flesh analyzed. It was found that he had gained 1,087.7 gm. of fat and 

 had consumed practically the same quantity, 1,084.4 gm. (The glyco- 

 gen of the meat consumed was reduced to fat in the computation.) 



From this experiment the authors conclude that the animal organism 

 can not build fat from protein. The nitrogen consumed was consider- 

 ably greater than the amount excreted in the urine and feces. Adding 

 to this latter quantity the amount which was gained in the form of 

 muscular tissue there still remained an excess of nitrogen which the 

 authors can not account for, 



A practical experiment in the study of dietaries, M, Talbot 

 {Review of Reviews, 13 {1896), No. 3, pp. 300-302). — A brief account is 

 given of a dietary investigation made at the Women's Halls of the 

 University of Chicago. The composition of the food was calculated 

 from standard tables. 



The food purchased, the cost of food, and the nutrients consumed per 

 person per day in 1894 and 1895 are shown in the following table: 



Total amonnt pur<-liased and cost, with imtrients and nutritive value of food eoiiHumed per 



person per day. 



