1918] ANIMAL PRODUCTION. 167 



Food plants and textiles of ancient America, W. B. Saffoed (Proc. 2. Pan 

 Atner. Sci. Cong., 1915-16, vol. 1, pp. l/f6-159, pi. 1, figs. 4). — The paper gives 

 an account of the principal food and textile plants of the Americas and their 

 nse by the prehistoric inhabitants. It includes, among other plants, maize, 

 beans, peanuts and other legumes, squashes, pumpkins, various roots and 

 tubei's, coca, chocolate, tea, and cotton. 



[Food and its conservation in North Dakota], E. F. Ladd and Alma K. 

 Johnson (North Dakota Sta. Spec. Bui., 4 [1917], No. 15, pp. 379-394).— This 

 number contains analyses of various food and drug products togetlier with a 

 discussion of war bread and various other food conservation topics. 



Ten lessons on food conservation (Washington: U. S. Food Admin., 1917, 

 pp. 64)- — There is included, along with suggestions on conservation, a lesson 

 on the fundamentals of an adequate diet and the practical application of the 

 facts of nutrition. 



The eat-less-meat book. — (War ration housekeeping), Mrs. C. S. Peel 

 (London and New York: John Lane Co., 1917, pp. 207). — War ration house- 

 keeping in England is discussed, including a popular summary of food values 

 and menus. A large part of the book is taken up with recipes using little meat. 



Bibliography of school lunches, compiled by Lucy Condell (17. S. Bur. 

 Ed. Circ., 1917, pp. 25).— Some 150 titles are included. 



The effect on human milk production of diets containing various forms 

 and quantities of protein, B. R. Hoobler (Amer. Jour. Diseases Children, 14 

 (1917), No. 2, pp. 105-112). — The author concludes that a nutritive ratio of 1 

 part digestible protein to 6 parts digestible fat and carbohydrate seems best 

 adapted to the needs of nursing mothers. Animal protein is deemed more suit- 

 able than vegetable protein in supplying nitrogen and maintaining the nitrogen 

 balance. The protein from nuts, when fed with other vegetable protein, is also 

 adequate. 



" A diet composed exclusively of cereals, fruits, and vegetables does not sup- 

 ply sufficient protein for elaborating milk protein and causes a severe drain 

 on the tissues of mother. 



" Of the various forms of animal protein, that which is derived from cow's 

 milk seems particularly suitable for the production of human milk protein, as 

 well as for the preservation of maternal tissues." 



The effect of the emotions on the catalase content of the liver, W. E. and 

 E. L. BtJRGE (Amer. Jour. Physiol., 44 (1917), No. 1, pp. 75-79 ) .—Experimental 

 work on cats and dogs gives evidence that the fighting emotions and probably 

 exercise increase greatly the catalase content of the liver. This catalase is 

 given off to the blood and carried to the tissues, presumably to cause increased 

 oxidation. 



ANIMAL PRODUCTION. 



Palm-kernel cake, C. Ceowthee (Jour. Bd. Agr. [London], 23 (1916), No. 8, 

 pp. 734-749). — Studies by the University of Leeds are reported. 



On the question of palatability, reported by H. J. Hargraves, there was 

 varying difficulty at first to get cattle to eat palm-nut meal or cake, and a 

 uniform difficulty with sheep. This was not found to be due to flavor or aroma, 

 as usually believed, but to a grittiness present. Soaking or straining did not 

 overcome the difficulty, but mixing with other feeds, as linseed cake, overcame 

 the trouble in proportion to the admixture. The difficulty is deemed of no 

 practical significance where the palm-kernel cake does not form over one-third 

 or one-half of the total mixture. 



Keeping qualities, reported by W. Godden, showed that in the laboratory 

 and on the farm the palm-kernel cake compared favorably with six other 



