ANIMAL PRODUCTION. 891 



ANIMAL PRODUCTION. 



The isodynamic replacement of nutrients, II. I'. Akmsby {Science, v. ser., 18 

 {I'JU.i), Xo. 439, pp. 4^'1-4S7). — On the basis of results obtained in experiments with 

 a steer, made with tlie aid of a respiration calorimeter, the author discusses the 

 replacing value of luitrients and related topics. Since different materials recpiire 

 varying amounts of energy for their assimilation, the fact is pointed out that they 

 are not replaceable in a ration in direct proportion to their theoretical heat value. 



The author notes that the error involved in considering food as the fuel of the 

 vital furnace is based on the assumption that "the production of heat in the body is 

 an end in itself. The truth ajjpears to be that it is, in a physiological sense, an inci- 

 dent. The energy of the food is needed for the performance of the vital processes. 

 During these processes it undergoes various transformations, but finally the larger 

 part, or in the resting animal, all is degraded into heat, which incidentally serves to 

 maintain the temperature of the l)ody, and, as it would seem, is amjdy sufficient for 

 this purpose under a wide range of conditions." 



Laboratory manual of animal physiology, E. H. Steix {Tierphysiologisches 

 Prakiihun. Stuityari: Ferdhumd Eiike, J90o, pp. VIII -\- 144, ./'V*'- ~^)- — This volume 

 is designed as a laboratory manual for veterinarians and agriculturists, and contains 

 chapters on general methods, nutrients, foods and feeding stuffs, digestion, blood, 

 urine, milk, and butter. 



The influence of the retention of bile on g-astric digestion, F. d'Angelo 

 [Rend, e Mem. li. Accad. Set., Let. ed. Aii. Zehudi Aeireede, S. ,sr;'., 1 (1901-:?), pp. 34). — 

 Results of experiments with dogs are reported. 



The average composition of the animal body, L. Grandeau [Join-. Aijr. Prat., 

 n. ser:, 5 {190S), No. IS, pp. 561, 562). — A brief summarj' and discussion of analytical 

 data. 



The principal constituents of the animal body, water and mineral matters, 

 L. Grandeau [Jour. Ae/r. Prat., n. ser., 5 (1903), No. -21, pp. 657, 658). — A summary 

 and discussion. 



The iron content of the animal body, M. Schmey {Ztschr. Plu/siul. Chem., 39 

 (1903), No. 3-4, pp. 215-282). — The results of a large number of analyses of different 

 sorts are reported of the flesh of normal animals and those fed iron preparations. The 

 conclusion is drawn that the red color of the muscles of rabbits, chickens, and swine 

 is not determined by the iron content. Feeding iron preparations increased the 

 amount of iron in the body. Data are also given regarding the analyses of the eggs 

 of hens fed 011 iron preparations. 



Stable hygiene, E. A. A. Grange {Breeders' Gaz., 43 {1903), No. 24, pp. 1173, 1174, 

 fig. 1). — A l)rief account of the successful use of a ration of 3 qts. of molasses mixed 

 with 6 lbs. of finely chopped hay, fed 3 times a day, for bringing a horse into good 

 condition. At the end of 2 months the horse weighed 1,000 lbs., having made a gain 

 of 90 lbs. 



New molasses products in the feeding of farm animals, 1j. Grandeau {Jour. 

 Agr. Prat., n. ser., 5 {1903), No. 19, pp. 592, 593). — One of the newer molasses feeds 

 is described. 



Sugar, molasses, and molasses products in the feeding of animals, II. Van 

 DE Venne {Brussels: Lainertiii; rev. in lug. Agr. Clendilou.e, 13 {1903), No. 12, p. 572). — 

 A summary of available data on the subject. 



Sugar cane {Agr. Jonr. and Min. Pec, 6 {1903), No. 15, p. 539). — The value of 

 sugar cane as a fodder, especially for horses, is pointed out. 



Corn silk as a feed stuff, F. D. Taylor {Breeders' Gaz., 44 {1903), No. 15, p. 

 569). — Analyses made at the chemical laboratory of the University of Wisconsin of 

 a number of samples of corn silk are rejiorted, in several of which only the protein 

 and water were determined. The average percentage composition was as follows: 

 Water 13.56, i)rotein 18.28, fat 0.95, nitrogen-free extract 46.92, crude fiber 16.6, and 



