430 THE VITAMINES 



592. DRUMMOND, J. C. AND COWARD, KATHARINE HOPE: Researches on the 



fat-soluble accessory substance. V. The nutritive value of animal 

 and vegetable oils and fats considered in relation to their color. 

 Biochem. J. 14, 668, 1920. 



593. McCoLLUM, E. V., SIMMONDS, N. AND STEENBOCK, H. : A method for the 



separation of the dietary essential "fat-soluble A", from butter 

 fat. Proc. Amer. Soc. Biol. Chem. ; J. Biol. Chem. 29, XXVI, 1917. 



594. STEENBOCK, H., BOUTWELL, P. W. AND KENT, HAZEL E. : Fat-soluble 



vitamine. I. J. Biol. Chem. 35, 517, 1918. 



595. HOPKINS, F. G. : Discussion on the present condition of vitamines in 



clinical medicine. Brit. Med. J. July 31st, 147, 1920., 



596. McCoLLtrM, E. V. AND DAVIS, M.: Proc. Soc. Exp. Biol. Med. 11, 101, 



1913-1914. 



597. DRUMMOND, J. C. : The fat-soluble accessory factor. J. Physiol. 52, 



344, 1919. 



598. STEENBOCK AND BOUTWELL: Fat-soluble vitamine. V. Thermostability 



of the fat-soluble vitamine in plant materials. J. Biol. Chem. 41, 

 163, 1920. 



599. OSBORNE AND MENDEL: The stability of the growth-promoting substance 



in butter fat. Ibid. 24, 37, 1916. 

 599a. HOPKINS, F. G. : Effects of heat and aeration on fat-soluble vitamine. 



Biochem. J. 14, 725, 1920. 

 599b. DRUMMOND, J. C. AND COWARD, K. H.: Researches on fat-soluble 



accessory factors (vitamin A). VI. Effect of heat and oxygen on 



vitamin value of butter. Ibid. 14, 734, 1920. 



600. The same. Nutritive factors in plant tissues. IV. Fat-soluble vita- 



mines. Ibid. 14, 549, 1920. 



600a. ZILVA, S. S. : Action of ozone on fat-soluble factor in fats. Biochem. 

 J. 14, 740, 1920. 



601. FAHRION, W. : Fett und Vitamine. Chem. Umschau 97, 109, 1920. 



602. FREUDENBERG, ERNST AND KLOCMAN, LUDWIG: Spasmophilia. II. J. f. 



Kinderh. 79, 700. 



603. HESS, A. F. AND UNGER, LESTER J. : The deleterious effect of the alkalin- 



ization of infants' foods. J. A. M. A. 73, 1353, 1919. 



603a. DRUMMOND, J. C., COWARD, K. H. AND WATSON, A. F. : Notes on the 

 factors influencing the value of milk and butter sources of vitamin 

 A. Biochem. J. 15, 540, 1921. 



604. DRUMMOND, J. C. AND COWARD, K. H. : Researches on the fat-soluble 



accessory substance. III. Technique for carrying out feeding 

 tests for vitamine A (fat-soluble A). Biochem. J. 14, 661, 1920. 



604a. STAMMERS, A. D.: The value of steam distilled palm kernel oil as a 

 control fat. Biochem. J. 15, 489, 1921. 



605 COWARD AND DRUMMOND: Researches on the fat-soluble accessory 

 substance. IV. Nuts as a source of vitamin A. Biochem. J. 14, 

 665, 1920. 



605a. DELF, E. MARION: The distribution of accessory food factors (vita- 

 mins) in plants. S. Afr. J. Sci. 17, 121, 1920. - 



