372 EXPERIMENT STATION" BECOED. [Tol. 35 



295). — The author summarizes the results of previous investigators in feeding 

 ammonium salts, urea, asparagin, and other protein-rich substances, to carni- 

 vora, herbivora, and omuivora. 



A list of cited literature is included. 



Studies in the blood relationship of animals as displayed in the composi- 

 tions of the serum proteins, — V, The percentage of nonproteins in the sera 

 of certain animals and birds, R. M. Jewett (Jour. Biol. Chem., 25 (1916), 

 No. 1, pp. 21, 22).— In former articles of this series (E. S. R., 32, p. 861) it was 

 assumed that the amount of nonproteins in the blood sera of all animals was 

 about the same, but it has since been ascertained that this assumption is not 

 accurate. The present work was imdertaken to ascertain the amount of non- 

 protein in the blood of each kind of animal formerly studied and to correct 

 the figures which are affected by the revised estimation of the nonproteins. 



A table is given showing the refractive indexes obtained, the percentages 

 of albumin, globulin, and total protein determined by previous investigators, 

 and the figures as corrected by the present investigation, for the horse, ox, rat, 

 hog, sheep, goat, cat, dog, guinea pig, hen, and duck. 



The valuation of feeding stuffs, B. Laue (Filhling's Landw. Ztg., 64 (1915), 

 No. 15-16, pp. 377-407; abs. in Internal. Inst. Agr. [Rome'\, Mo. Bui. Agr. Intel, 

 and Plant Diseases, 6 (1915), No. 12, pp. 1694-1697).— On the basis of the 

 researches of Pfeiffer, Neubauer, and Mach on tlae estimation of the cash value 

 of feeding stuffs, the German Federation of Agricultural Exi:)eriment Stations 

 adopted in September, 1913, certain resolutions. The author subjects all these 

 conclusions to criticism and endeavors to establish the principles for a just 

 valuation of feeding stuffs. 



Comparative feeding value of green grass and hay (Mark Lane Express, 

 114 (1915), No. 4375, p. 145). — Experiments were conducted on the comparative 

 feeding value of fresh grass and hay, the latter made in the ordinary way 

 and also dried in hot-air chambers. 



The effect of these fodders on milk yield was tested with three ewes and a 

 goat, and the digestibility with the same three ewes later in the summer. 

 The milk yield showed no constant difference in quantity or in composition 

 between the green and dried grass, but the digestibility of fresh grass was 

 constantly, though slightly, greater. 



It is pointed out that the process of drying has a distinct influence on the 

 nutritive value. In ordinary haymaking there is considerable loss from 

 oxidation. This may be avoided by a rapid drying in which the initial tempera- 

 ture is high but does not exceed 100° C. The changes in digestibility seem 

 to be due rather to changes of a physical nature than to chemical decomposition. 

 They are sometimes so small as hardly to alter the proportion of starch. 



The feeding of grain sorghums to live stock, G. A. Scott (JJ. 8. Dept. Agr., 

 Farmers' Btil. 724 (1916), pp. 14, figs. 5). — This treats of the composition and 

 feeding value of the various grain sorghums, including analyses, and data as to 

 methods of feeding and the value of the sorghums as forage, together with 

 a number of suggested rations for various kinds of live stock. 



In tests conducted by the Department on Texas farms grain sorghums were 

 fed to beef cattle. The results obtained indicate the efficiency of the grain- 

 sorghum feeds in the form of chop, head chop, silage, fodder, or stover, both 

 in wintering cattle and in finishing them for the block. Silage of the grain sor- 

 ghums was found to be very beneficial for increasing the appetites of feeders, 

 keeping them in fine condition, and adding a high finish. 



