ANIMAL PEODUCTION. 363 



Analyses of feeding stufEs, E. Haselhoff {JaJiresher. Landw. Vers. Stat. 

 Marhurg, 1909-10, pp. 10-15). — Analyses are reported of peanut, sesame, turnip, 

 linseed', palm-nut, coconut, bassia, coffee, corn-oil, and beechnut cakes; cotton- 

 seed, rice, meat, fish, and soy-bean meals ; wheat and rye brans ; ground bar- 

 ley ; distillery slop ; brewers' grains ; malt germ ; molasses feed ; beet chips ; 

 oats ; barley ; field beans ; potatoes ; and mixed feeds. 



The valuation of carbohydrates and protein in commercial feeds, P. H. 

 Rolfs {Proc. Hoc. Prom. Agr. ScL, 31 {1910), pp. 101-109). — A method is pro- 

 posed for estimating the value of the protein and carbohydrate content in com- 

 mercial feeding stuffs, so that different feeding stuffs can be compared as to 

 their nutritive value. 



Digestion of cellulose by the dog, and methods for the quantitative deter- 

 mination of cellulose, H. Lohrisch (IIoppc-Seijler\s Ztschr, Plnjsiol. Chcm., 69 

 (1910), No. 2, pp. 143-151). — The author has repeated some of his work with 

 the dog, with particular reference to the method employed for determining the 

 cellulose and the findings of Lotsch and Scheunert and of Grimmer and Scheu- 

 uert ( E. S. R., 23, p. 417 ) . He now concludes that dogs can not digest cellulose, 

 but does not believe that Scheuuert's criticism applies to cellulose digestion in 

 man. 



A contribution to the study of the protein metabolism of the fetus. — The 

 distribution of nitrogen in the maternal urine and in the fetal fluids 

 throughout pregnancy, Dorothy E. Lindsay (Bio-Cheni. Jour., 6 {1911), No. 1, 

 pp. 79-99). — An examination of the adult urine and the fetal fluids of cattle, 

 sheep, and goats was made in order to discover if there are any characteristic 

 differences between adult and fetal protein metabolism. The results are sum- 

 marized as follows : 



" Certain differences are shown to exist between the distribution of nitrogen 

 in the urine of the bullock and of the cow. The urine of the cow contains a 

 large amount of allantoin and of hippuric acid. In the bullock's urine the 

 amino acid content is much smaller and contains a much smaller proportion of 

 hippuric acid, while allantoin is almost entirely absent. 



" There is an increase in the amount of nonprotein nitrogen in the fetal fluids 

 throughout the first half of pregnancy. But the amount of nitrogen per unit 

 of weight of the fetus decreases regularly. The fetal fluids are shown to con- 

 tain the ordinary urinary constituents of adult urine — urea, allantoin, mon- 

 amino acids, creatinin, creatin, with, in addition, small amounts of polypeptid 

 nitrogen, nitrogen in diamino acids, and nitrogen in compounds which are not 

 found in the adult urine, and the nature of which has not so far been eluci- 

 dated. 



" Variations in the distribution of nitrogen in the fetal fluids throughout the 

 course of pregnancy exist, which, in the main, consist of a decrease in the 

 proportion of urea nitrogen with a corresponding increase in the proportion of 

 allantoin and amino acid nitrogen. A study of the early allontoic fluid — the 

 urine of the early fetus — shows, as compared with the adult urine, a low urea 

 content, a high proportion of allantoin and amino acids, and a large amount of 

 undetermined nitrogen. 



" It is therefore concluded that the fetal metabolism differs from that of the 

 adult in the less complete catabolism of the protein and in the greater activity 

 of nuclear metabolism as indicated by the amount of allantoin." 



Nuclein metabolism in swine, F. Meier {tjher den NuJcleinstoffwechsels des 

 Schtceines. Inaiig. Diss., Univ. Giessen, 1910, pp. 35). — As in the case of dogs 

 and rabbits nucleic acid when given in the feed of swine was largely resorbed 

 and reappeared as an end product in the allantoin fraction. Only small per- 



