ANIMAL PRODUCTION. 791 



The origin of fat in the animal body, (i. Rosenfeli> {Clion. Zfg., 26 {1903), 

 No. 9S, p. 1110). — In a paper jiresented before the Chemical Society of Berlin the 

 author reported metaboli.^m experiments which, in his opinion, showed that the 

 formation of fat from protein in the animal body is not demonstrated. He beheves 

 that fat in food passes into the body tissue without much change and that fat is 

 fonm'd from carbohydrates whicli apparently has a low content of oleif; acid. 



The role of salt in animal feeding, A. Dissard [Rev. Agr. lirnnion, S {1902), 

 Xo. 11, pp. 444-443). —In this article, which was quoted from AyricnJlure Nourelle, 

 tiie importance of salt is discussed, as well as the amounts which should be fed, and 

 related topics. 



The adipolytic ferment in the stomach, F. Volhard {ZtHckr. Klin. Med. 

 [BcrUii], 43 {1901), pp. S97-440; (/bi^. In Zfschr. Untersuch. Nahr. ?(. Genusmdl., 5 

 {1902), Xn. 20, pp. 909, 970). — According to the author the digestive juice of the 

 stomach contains a ferment which causes cleavage of fat and the extract of the 

 mucous membrane of the stomach contains the zymogen of this ferment. The 

 properties of both of these bodies are discussed. 



Concerning- the ferment in the mucous membrane of the pylorus, F. Klug 

 {Arch. l'hif.'<iol. [Ptiicjcr], 92 {1902), Xo. 6-7,' i>i>. i',S'7-^\9..^).— .\ number of experi- 

 ments are reported. 



Influence of the spleen on the assimilation of nitrogen, I. BvELcioosKr {Zap. 

 Novo-Alexandri Inst. Selsk. Khoz. i. Li/e.^oi-., 14 {1901), No. 1, pp. 205-211). — Experi- 

 ments made with dogs in which the income and outgo of nitrogen was determined, 

 showed that the removal of the spleen did not materially affect the assimilation of 

 this element. — p. fireman. 



Experiments on feeding animals carried on in Seine-Inferieure in 1901, F. 

 Laurent {Compl. Rend. Cong. Soc. Aliment. Rat. Bet., 6 {1902), pp. .5.^-6.?).— Feeding 

 tests with steers, milch cows, and sheep are reported in which the value of conuner- 

 cial concentrated feeds was studied. In the first test, which was made by Prunier, 

 12 steers, divided into 4 lots of 3 each, were fed linseed cake, gluten cake, sesame 

 cake, and decorticated peanut cake, in addition to a coarse fodder. In the 56 days of 

 the test the total gains made were 78, 86, 85, and 87 kg. per lot, and the corresponding 

 cost of a kilogram of gain was 14.4, 9.8, 10.6, and 13.2 cts. The conclusion is drawn 

 that all the cakes were satisfactory and that their selection should be determined by 

 market prices. 



The comparative feeding value of wheat bran, decorticated cotton-seed cake, 

 decorticated peanut cake, and sesame cake was tested by Luquet with 4 lots of 4 cows 

 each. Each cow was fed 3 kg. of the concentrated feed in addition to a basal ration 

 of 12 kg. fodder beets, 1 kg. chaffed straw, and 10 kg. meadow hay per head. In 56 

 days the total quantity of milk produced by the 4 lots was 2,333.5, 2,462.0, 2,494.5, and 

 2,473.5 liters, respectively. During the feeding period lots 1, 3, and 4 lost respectively 

 58, 38, and 24 kg. in weight, and lot 2 gained 116 kg. In the author's opinion the 

 tests showed that it is profitable to use concentrated feeds like those tested. The 

 cotton-seed cake proved to be especially satisfactory, securing an abundant flow of 

 milk of first quality and maintaining the cows in good condition. 



Using 6 lots of 5 sheep each, E. Braye tested the comparative value of maize, colza 

 cake, decorticated cotton-seed cake, sesame cake, i)eanut cake, and linseed cake. 

 The basal ration consisted of 1 kg. oat straw, 0.5 kg. chaffed straw, 5 kg. fodder beets, 

 and 1 kg. alfalfa rowen per head per day. During the first two-thirds of the tests, 

 which covered 60 days, each sheep was fed 500 gm. per day of the concentrated feed, 

 and during the last third of the period 600 gm. per day. At the beginning of the 

 test the average weight of the sheep varied from 259.5 kg. for lot 1 to 311 kg. for lot 

 6. The total gain of the 6 lots was 29.5, 21, 21, 21.5, 13.5, and 14 kg., respectively. 

 Rating the value of the gains in weight at 20 cts. per kilogram, the gains ranged in 

 value from $2.70 with lot 5 to $5.90 with lot 1. According to the author, full-grown 



