REFERENCES 



Under this heading It is proposed to include, by author, title, and citation, references to all 

 scientific papers published in or emanating from Washington. It is requested that authors cooperate 

 with the editors by submitting titles promptly, following the style used below. These references are 

 not intended to replace the more extended abstracts published elsewhere in this Journal. 



PHYSICS 



Bureau of Standards. The testing of hydrometers. 4th ed. Circular No. 16. 

 1916. 



Bureau op Standards. Invar and related nickel steels. Circular No. 58. Pp. 68. 

 1916. 



Bureau of Standards. Standard density and volumetric tables, 5th ed. Circu- 

 lar No. 19. Pp. 64. 1916. 



Foote, Paul D., and Fairchild, C. O. Luminosity of a black body and tempera- 

 ture. Bureau of Standards Sci. Paper No. 270, pp. 137-145. 1916. 



CHEMISTRY 



Berg, W. N. Biochemical comparisons between mature beef and immature veal. 



Journal of Agricultural Research, 4: 667-712, figs. 1-6. January 10, 1916. 

 Gile, P. L., and Carrero, J. O. Ash composition of upland rice at various stages 



of growth. Journal of Agricultural Research, 5: 357-364. November 29, 1915. 

 Gore, H. C. Studies of fruit juices. Bulletin of the IT. S. Department of Agri- 

 culture, No. 241. Pp. 1-19. June 14, 1915. 

 Hasselbring, H., and Hawkins, L. A. Carbohydrate transformations in sweet 



potatoes. Journal of Agricultural Research, 5: 543-560. December 27, 1915. 

 Headden, W. P. Occurrence of manganese in wheat. Journal of Agricultural 



Research, 5: 349-356. November 22, 1915. 

 Russell, G. A. A study of the soft resins in sulphured and unsulphured hops in 



cold and in open storage. U. S. Department of Agriculture, Bulletin No. 282. 



Pp. 1-19. August 11, 1915. 

 Shedd, O. M. Variations in mineral composition of sap, leaves, and steins of the 



wild-grape vine and sugar-maple tree. Journal of Agricultural Research, 5: 



529-542. December 20, 1915. 

 Thatcher, R. W. Enzyms of apples and their relation to the ripening process. 



Journal of Agricultural Research, 5: 103-116. October 18, 1915. 

 Withers, W. A., and Carruth, F. A. Gossypol, the toxic substance in cottonseed 



meal. Journal of Agricultural Research, 5: 261-288, pis. 25-26. November 



15, 1915. 



245 



