Analytical 



Diss., Konigsberg (Berlin) ; Zur Kenntnis des Uroroseins, 



Konigsberger med. Inaug-Diss., (Berlin) : both as quoted by 



Ellinger in Abderhalden's Handbuch, Abt. i, Teil 7. 



Roe, J. H., and Hall, J. M. (1939). Journ. Biol. Chem., 128, 



329- 

 Roth, H. (1939). Angew. Chem., 52, 149. 



Salkowski, E. (and H.) (1884), Ztschr . physiol Chem., 8, 417; 

 (1899) ibid., 27, 302. 



Schmitz, E. (193 1), Die Harnfarbstoffe, Sect, in Abder- 

 halden's i7«n</6Mc/i, Abt. 4, Teil 5 (i), 513-544. 



Schopfer, H., and Jung, A. (1938). Ztschr. Vitaminforsch. 

 7, 143. {Chem. Abs., 32, 6298). 



Steenbock, A. (1912), Journ. Biol. Chem., 11, 201. 



Villela, C. G. (1938). Compt. rend. Soc. Biol, 129, 989 (from 

 Chem. Abs., 33, 2928). 



Virtanen, A. I., and Laine, T. (1937), N-fixation by excised 

 root-nodules. Suomen Kemistilehti, B, 10, 24. 



Waser, E. B. H. (1923). In Abderhalden's Handbuch, Abt. i, 

 Teil 7, 567-778. 



Went, F. W. (1934). Versl. K. Akad. Wet., Amsterdam, 37, 



547- 

 Winkler, S. (1934), Uber die Tryptophan-Reaktion von 



Adamkiewicz-Hopkins, Ztschr. physiol. Chem., 228, 50. 

 Winkler, S., and Petersen, S. (1935), Ztschr. physiol. Chem., 



231, 210. 

 Wohl, A. (1907), Ber., 40, 2282. 



A review of chemical methods of determining carotene and 

 vitamins A, B^, Bg (lactoflavin), and C, including some 

 methods adapted for urine analysis, has been given by 

 K. Hinsberg in Zeitschr. anal. Chem., 1939, 117, 284. See 

 also p. 68 for work with vitamin B^. 



135 



