ANIMAL TRODrCTlOlSr. 177 



varieties which naturally teinl to grow l)eiieath the soil, j^roviding they furnish an 

 adequate yield pei- ai-re, will ]>e the most i)rolitahle to grow." 



Compilation of analyses of fodder articles made at Amherst, Mass., 1868- 

 1901, E. B. Holland and P. H. SMrni, jr. {MasxachmcUs Sta. Jipt. 1901, pp. 171- 

 19J). — The results of proximate and fertilizer analyses of feeding stuffs are quoted, 

 aiitl in many cases the digestil)ility is also included. 



Corn by-products — gluten meal, gluten feed, etc., F. T. Siiutt {CfOKida Plrpt. 

 Farnts lipts. 1901, pp. 185-190). — Analyses of feeding stuffs including gluten meal, 

 cattle feeil, rice feed, calf meal, and potato starch are reported. 



Cattle-feed inspection, J. B. Lindsey {Massachusetts Sta. Rpt. 1901, pp. 152- 

 156) .—Results of the inspection of cattle feeds during the year are briefly stated and 

 the text of the feed stuff law is given. 



Coefficients of digestibility of American feed stuffs, J. B. Lindsey and N. J. 

 LIuNTiNc; {MasmrJiKsiits Sta. Upt 1901, pp. 19.5-210). — A compilation including the 

 results of experiments with ruminants, swine, horses, and poultry. 



Distillery refuse, Dietrich i Landw. Vers. Stat., 56 {1902), Xo. 4, pp. S21-S66).— 

 A summary of the information available regarding the manufacture and composition 

 and feeding value of fresh and dry distillery refuse of different sorts. 



[Panicum grass] better than sorghum, D. G. Shorey {Honolula Bid., 1902, 

 Fell. 7). — The compositicm of local grown jjanicum grass was determined and its 

 food value discussed. 



The exact calculation of balanced rations, J. T. Willard {Tndv..^triaH4, 28 

 {1902), No. 21, pji. 319-.1S0). — A method of (•alculating rations on the -principles of 

 alligation is described. 



Cleavage of fat by micro-organisms, K. Schreiber {Arch. Ibig., 41 {1902), No. 

 4, pj>. 328-347 ).^=^From experiments which are reported in detail, the following con- 

 clusions were drawn: Pure fat is not a nutrient medium for micro-organisms. A 

 number of bacteria which occur in soil and elsewhere in nature induce cleavage in 

 fat, provided nutrient material and oxygen are present. Their action is especially 

 energetic if the acid formed is neutralized with calcium carbonate. The cleavage is 

 most rapid when the fat is flnely divided as in an emulsion. External conditions, 

 such as temperature, lack of oxygen and light, which hinder the growth of the bac- 

 teria under consideration, doubtless hinder in like measure their action upon fat. 

 At any rate, the extent of cleavage brought about by different species is affected in 

 many ways. A number of molds also induce cleavage in fat. Their action is not 

 diminished Ijy the acidity of the fat on which they grow. The adipolytic power of 

 the micro-organisms mentioned is intimately connected with their life processes and 

 is dependent upon the presence of oxygen. In the case of anaerobic bacteria, there 

 is probably a slight cleavage of fat which is, however, not sufficient to l^e regarded 

 as destructive. 



Calcium soaps as a proof that the resorption of fat takes place in aqueous 

 solutions, E. Pfluger {Arch. Physiol. [Pfiiiger'], 89 {1902), No. 5-6, pp. 211-226).— 

 Continuing earlier work (E. S. R., 13, p. 775), the author discusses critically the 

 experiments of a number of investigators, the final conclusion being that all digestion 

 is a process of hydrolysis, and that all resorption is a diffusion of substances in 

 aijueous solutions. 



Concerning pepsin, C. A. Pekelharing {Ztschr. PJii/siol. Chem.,35 {1902), No. 1, 

 pp. 8-30). — A chemical study of pepsin from pigs' and from dogs' stomachs. The 

 author obtained the latter in a very pure form of practically constant chemical com- 

 l)osition. 



The movements of the intestines studied by means of the Bontgen rays, 

 W. B. Cannon {Amer. .Tour. Physlul., 6 {1902), No. 5, pp. 251-277, figs. 76*).— When 

 bismuth subnitrate is mixed with food, the movements of the intestinal contents can 

 be observed with a fluorescent screen. Experiments with a cat are reported. The 



