ANIMAL PRODUCTION. 1171 



" Tlio prorisioii <if llio method and its strikinj? results aijpareiitly optMi to 

 biologists a tield wbieli Lias lain dormant since its discovery by Daddi 12 years 

 ajio, that is, the possibility of following with great exactness at least one of 

 the processes of nutrition." 



Comparative investigations on the effect of proteid and nonproteid nitro- 

 gen on (the) gain in weight of ruminants, J. Just (Londir. Vers. SUit., 69 

 ( WOS), Xo. 5-6, pp. 393--'i60). — For these experiments 7 months old lambs were 

 fed a basal ration low in protein, which consisted of meadow hay, starch meal, 

 and sugar. P^ir supplementary rations gluten meal was alternated with mo- 

 lasses chips, malt sprout extract, potato chips, and grass extract. 



There was but little, difference between the protein digestion coefhcient of 

 the supplementary feeds, except that with potato flakes it was somewhat lower 

 and with grass extract it was considerably lower than with the other feeds. 

 In general the results of these experiments agreed with those of Frledlaeuder 

 (E. S. R., 20, p. 70) that amids are not of equal value with true protein. 



On the influence of food fat on the body fat of swine, with special refer- 

 ence to the final location of phytosterin, J. Konig and J. Schluckebieb 

 (Ztschr. Untersiich. Nahr. u. Genussmtl., 15 {1908), No. 11, pp. 6.'il~661 ; abs. in 

 i'hcm. ZenthL, 1908, II, No. 5, p. ^27). — From their original investigations the 

 authors found that fat in cotton-seed meal and se-same meal was well utilized 

 l)y young animals. The nonsaponitiable fats may be resorbed as body fats. 

 Coloring matters in cotton-seed meal and sesame meal may be detected in 

 the body fat of swine, though when fed to cows they could not be detected in 

 milk fat. The body fats seem to retain the same chemical and physical proper- 

 ties that they have in the feed. As animals grow older the melting point of 

 the body fat is raised and the corresponding iodin number falls. I.,eaf fat has 

 a high melting point and a low iodin number. Phytosterin and cliolesterin 

 appear partially as koprosterin in the feces, thougli a part is imchanged. Itela- 

 tively more nonsaponitiable fat is found in the feces than is contained in the 

 food fat. After a long feeding with plant fats only cholesterin ajipears in the 

 body in organic fats. Organs like the brain and liver though ricli in cholesterin 

 are not rich in phytosterin. 



These experiments confirm the results of other investigators (E. S. R., 16, 

 p. IS) that the ph.vtosterin and phytosterin-acetate test of Bchner is a reliable 

 method of detecting plant fat§ in animal fats. 



Daily rations approximately balanced for different animals per 1,000 lbs. 

 live weight, W. II. Dalkymplk {Ann. ]{pt. Af/r. and Indiix. Shitis. lid. Agr. 

 (ind lininiijr. [Jai.'\, 1908. pp. 5-8). — This presents sample rations for horses, 

 nniles, oxen, and dairy cattle, in which cotton-seed meal, molasses, and other 

 by-products can be utilized. 



Commercial feeding stuffs of Pennsylvania in 1907, F, I). 1*\jller (Pcnn. 

 Dcpt. A fir. liiil. 161, pp. 1-91). — This is the annual report of the chemical and 

 microscopical work i)erformed by the division of chemistry in the examination 

 of commercial feeding stuffs, and contains descriptions, analyses, and the com- 

 I)arative cost of feeds. 



"Of tlie 500 samples CDllected, 40.S wei'e examined cliemically and microscop- 

 ically. Fifty-eight samples contained less protein than guarantied by the 

 manufacturers, and o7 samples were deficient in fat. . . . Practically all of 

 the molasses feeds found upon tlie market contained a large proportion of weed 

 seeds, and many of them were adulterated with rice hulks. Money wliich was 

 formerly spent in purchasing low grade oat feeds is apparentl.v being put into 

 fetMling stuffs of standard (piality. and. therefore, we do not find as nnich oat 

 feed in IV'unsylvania as in former years." The most serious adulteration was 



