572 EXPERIMENT STATION RECORD. 



different days in the first, second, third, and fourth subperiods respectively. 

 The maximum urine flow occurred uniformly in the second subperiod of those 

 days on which large volumes of water were being ingested. This uniformity 

 was not observed on the days of low water ingestion." 



Concerning- protein metabolism, F. Frank and A. Schittenhelm {Ztschr. 

 rhysiol. Clicm., 70 (1910), No. 2-3, pp. 98-128, dgms. 6).— In the experiments 

 reported, which were made with man and animals (dogs), different kinds of 

 protein flesh food were supplied. 



According to the authors' conclusions, the results obtained lead to the belief 

 that food protein should be similar to body protein in its composition, be easily 

 acted upon by digestive ferments, and supply all the necessary cleavage products 

 in proper proportion. The results are discussed with reference to the theory 

 that the most economical protein would be that supplied by the flesh of the 

 species fed, and the authors' conclusions are that such protein might be equal 

 to some other satisfactory protein but not superior to it. 



The relation between mineral metabolism and organic nutrients, E. Biek- 

 KACKi (Wictier Klin. Wchnschr., 23 {1910), No. 23, pp. S50-8o-}).— A digest and 

 discussion of recently published data, particularly the author's own investiga- 

 tions (E. S. R., 22, p. 370). 



In general, the author emphasizes the importance of ash constituents in 

 relation to normal metabolic processes. He believes that normal metabolism 

 of mineral constituents is impossible without normal diet, that is, without a 

 proper quantitative relationship between the protein, fat, and carbohydrates 

 supplied. 



The importance of cooking salt in metabolism, H. Strauss {Berlin. Klin. 

 Wchnschr., 47 {1910), No. 50, pp. 2292-2295).— A digest of data on the relation 

 of salt to nutrition, particularly with reference to pathological conditions. 



The spleen in its relation to iron metabolism, R. Zimmeemann {Fortgesetztc 

 Beitriige ziir FiDtktion dcr MHz als Organ dcs Elscnstnfficcchscls. Inaiig. Diss., 

 Univ. Bern, 1909, pp. li'i). — According to the author's conclusions from experi- 

 ments with normal dogs and with dogs with the spleen removed, this organ is 

 concerned in the synthesis of iron products from the iron liberated by hemolysis, 

 but this function of the spleen is not very pronounced. The investigations 

 reported are discussed at length. 



On the preservation of feces, P. E. Howe, T. A. Rutherford, and P. B. Hawk 

 {Jour. Amcr. Chcm. Soc, 32 {1910), No. 12, pp. 1683-1686).— AccovAing to the 

 authors' summai-y the method of collecting and preserving feces which involves 

 the use of friction-top pails gives very satisfactory results, since it permits the 

 analysis of fresh feces, prevents loss of moisture, maintains the nitrogen content 

 practically unaltered for at least 20 days and frequently for a much longer 

 period, and eliminates loss of material. 



ANIMAL PKODUCTION. 



On the production value of feeding stuffs, N. Hansson (Tidsskr. Norske 

 Landbr., 17 {1910), No. 12, pp. 578-586). — An address delivered at the meeting 

 of the Society for Norway's Weal at Aas, October 4. 1910, giving a resume of 

 the author's studies of the subject (E. S. R., 20, pp. 475, 1065). 



Definitions of feed stuffs {Amer. Hay, Flour and Feed Jour., 18 {1911), No. 

 2, pp. 19, 20). — A list of tentative definitions of feeding stuffs adopted in 1910 

 by the Association of Feed Control Officials (E. S. R., 24, p. 98). 



Registered feeding stuffs {Kansas Sta. Feeding Stuffs Bills. 10-16, pp. 4 

 each). — These contain lists of feeding stuff's registered in the State and extracts 

 from the state feeding stuffs law. 



