BIBLIOGRAPHY 499 



Simpson, W. L., and Cramer, W. (1945). Fluorescence studies of carcinogens 



in skin. II. ISIouse skin after single and multiple applications of 20-methyl- 



cholanthrene. Cancer Research, 5: 449-463. 

 Sinnott, E. W. (1944). Science and the education of free men. Am. Scientist, 



32: 205-215. 

 Sisco, R. C, Cunningham, B., and Kirk, P. L. (1941). Quantitative drop 



analysis. XIII. The formal titration of amino nitrogen. J . Biol. Chem., 



139: 1-10. 

 Siwe, S. A. (1935a). Stufenphotometrische Bestimmung von Phosphor in 



kleinen Blutmengen. Biochem. Z., 278: 437^41. 

 Siwe, S. A. (1935b). Einige Methoden zur Bestimmung von Ca in kleinen 



Blutmengen. Biochem. Z., 278: 442-446. 

 Sjostrand, F. (1945/1946). trber die Eigenfluorescenz tierischer Gewebe mit 



besonderer Beriicksichtigung der Saiigetierniere. Acta Anat., 1, Suppl. 1; 



163 pp. 

 Sjostrand, F. (1946a). Cytological localization of riboflavin and thiamine by 



fluorescence microspectrography. Nature, 157: 698. 

 Sjostrand, F. (1946b). The fluorescence microspectrographic localization of 



riboflavin (vitamin B2) and thiamin (vitamin Bi) in tissue cells. Acta 



Physiol. Scand., 12 : 42-52. 

 Skarstrom, C, and Beams, J. W. (1940). The electrically driven magnetically 



supported vacuum type ultracentrifuge. Rev. Set. Instruments, 11: 398-403. 

 Snell, E. E., and Strong, F. M. (1939). A microbiological assay for riboflavin. 



Ind. kng. Chem., Anal. Ed., 11: 346-350. 

 Sobel, A. E., and Kaye, I. A. (1940). Estimation of submicroquantities of 



calcium. Ind. Eng. Chem., Anal. Ed., 12: llS-120. 

 S0eberg-Ohlsen, A. (1941). Contribution to the histochemistry of the stomach. 



Compt. rend. trav. lab. Carlsberg, Sir. chim., 223: 329-482. 

 Sreenivasaya, M., and Bhagvat, K. (1937). Dilatometiy and its applications in 



the study of enzymes. Ergeb. Enzymforsch., 6: 234-243. 

 Stadie, W. C, O'Brien, H., and Lang, E. P. (1931). Determination of the pH 



of serum at 38° with the glass electrode and an improved electron tube 



potentiometer. J. Biol. Chem., 91 : 243-269. 

 Stehle, R. L. (1921). The gasometric determination of urea in urine. J. Biol. 



Chem., 4:7: 13-17. 

 Steiger, A. (1941). Mikrochemischer Nachweis des Karotins. Microkosmos, 34: 



121-122. 

 Stein, J. (1935). Reaction histochimique stable de detection de la bilirubine. 



Compt. rend. soc. bioL, 120: 1136-1138. 

 Stern, K. G. (1932). Uber die Katalase farbloser Blutzellen. Z. physiol. Chem., 



204: 259-282. 

 Stern, K. G. (1942). A simple ultracentrifuge with plastic rotor. Science, 95: 



561-562. 

 Stern, K. G. (1943). Studies on macromolecular particles endowed with specific 



biological activity. Biol. Symposia, 10: 291-321. 

 Stern, K. G., and Wyckoff, R. W. G. (1938a). An ultracentrifugal study of 



catalase. Science, 87: 18. 



