170 EXPERIMENT STATION RECORD. 



" With a fat diet, practically nitrogen and carboliydrate free, there is a 

 marked rise in the output of urinary nitrogen. 



" During starvation creatin is constantly present in the urine. 



" The output of creatin induced by fasting at once falls when the diet consists 

 of carboliydrate, wliercas with the fat diet the amount excreted increases. 



" The amount of creatin excreted during the fat period is not markeilly 

 reduced by the addition of protein food (carbohydrate free) to the diet. 



" The hypothesis is put forward that the carbohydrates are absolutely essen- 

 tial for eudocellular syntlietic processes in connection with protein metabolism. 



" It is probable that foodstuffs should be valued, as Chauveau suggested, more 

 on account of their isoglycogenic than their isodynamic value." 



The author notes that the banana flour which was made into small calves 

 and eaten with honey " was not on the whole very w^ell utilized." 



Lowering- the rate of metabolism, R. Stehelin {Dent. Med. Wchnschr., 35 

 (190!)), No, l.'i, pik GOD-GIJ). — Both fat and carboliydrates lower the metabolism 

 of protein when taken with it, according to the author's conclusions. The paper 

 as a whole has to do with metabolism in disease. 



The Harvey lectures, 1906-7 .(I'hiladelpJiia and London, 1908, pp. Sl.'i, pis. Ji, 

 figs. J/S, charts //). — Among the papers included in this A'olume several are of 

 special interest in connection with physiological chemistry, nutrition, and re- 

 lated subjects, namely : The Principles of Vaccine Therapy, by A. E. Wright ; The 

 Common Bacteriological Infections of the Digestive Tract and the Intoxications 

 Arising Therefrom, by C. A. Herter ; The Myelins and Potential Fluid Crystals 

 of the Body, by J. G. Adami ; The Factors of Safety in Ajiimal Structure and 

 Animal Economy, by S. J. Meltzer (E. S. R., 19, p. 63) ; Metabolism During 

 Inanition, by F. G. Benedict (E. S. R., 19, p. 866) ; and Some Recent Studies 

 on Heredity, by E. B. Wilson (E. S. R., 19, p. 271). 



Organization, work, and publications of Food and Nutrition Investigations 

 (U 8. Dept. Agr., Office Expt. Stas. Circ. 89, pp. 18). — ^A short account is given 

 of the organization and scope of the Nutrition Investigations of the Office of 

 Experiment Stations, to which is appended a list of publications of the Office 

 relating to the food and nutrition of man. In addition to the usual biblio- 

 graphical data, brief notes are given in every case regarding the character of 

 the publications listed. 



The purpose of these Nutrition Investigations, as stated in this circular, is to 

 study various aspects of the problem of the value for human food of agricul- 

 tural products, both animal and vegetable. 



ANIMAL PRODUCTION. 



Animal nutrition problems in relation to the work of the experiment 

 stations, C. F. Langwokthy ( U. 8. Dept. Agr., Office Expt. Stas. Rpt. 1908, pp. 

 331-35 Ji). — In this article the important progress made in the growth of scien- 

 tific methods for studying the problems of animal nutrition is discussed. 

 Recent noteworthy investigations, particularly at the American experiment 

 stations, are cited to show how the methods of the practical feeder depending 

 upon empirical knowledge are gradually giving way to exact methods, which 

 can be discovered only by laboratory investigations. 



Among other topics briefly treated are the chemistry of embryonic life, the 

 need for a better knowledge of the relation of the protein requirement to the 

 ash requirement and other factors, and the study of new or little known feed- 

 ing stufl's. Lines of work are suggested which pi'omise results of theoretical 

 and practical importance. There are numerous references to the literature. 



