560 . PROTOPLASM 



: Individual differences in human blood, Science, 73: 403 (1931). 



et al.: Flocculation reactions of erythrocytes, Jour. Exp, Med., 42: 



123 (1925). 

 et al. : Group specific flocculation reactions of human blood, Proc. Soc. 



Exp. Biol. Med., 22: 289 (1925). 



et al.: Human blood groups, Jour. Immunol., 11: 221 (1926). 



Levene, p. a.: The chemical individuality of tissue elements, Jour. Am.. 



Chem. Soc, 39: 828 (1917). 

 MuDD, S.: Sensitization of bacteria, etc.. Jour. Immunol., 26: 447 (1934). 

 et al.: Opsonin and bacteriotropen action. Jour. Exp. Med., 49: 779, 



797, 815, (1929); 52: 299, 313 (1930). 

 MuLLER, H. J.: The gene, Proc. Internal. Congr. Plant Sci., Ithaca, 1: 897 



(1929). 



Immunity 



Arrhenitts, S. : "Immunochemie," Leipzig, 1907. 



Landsteiner, K.: Cell antigens and individual specificity, Jour. Immunol., 



15: 589 (1928). 

 : "Die Spezifizitat der Serologischen Reaktionen," Berlin, 1933. 



et al.: Specificity of agglutinins and precipitins, Jour. Exp. Med., 



40: 91 (1924). 



NuTTALL, G. H. F.: "Blood Immunity and Blood Relationship," Cambridge, 



1904. 

 Wells, H. G.: "The Chemical Aspects of Immunity," New York, 1929. 



XXVI. REGULATORY SUBSTANCES 



Enzymes 



Linderstr0m-Lang, K., et al: Enzymatische Histochemie, Engel. Enzym- 

 /orsc/i., 3: 309 (1934). 



Hormones 



Needham, J.: "Chemical Embryology," Cambridge, 1931. 



Waddington, C. H., et al.: The amphibian organizer. Nature, 132: 239 



(1933). 

 Went, F. A. F. C: Investigations on growth, Biol. Revs., 10: 187 (1935). 

 Went, F. W.: Auxin, Bot. Revs., 1: 162 (1935). 



Vitamins 



Karrer, P.: Vitamins A and C, Chem. Revs., 14: 17 (1934). 

 McCoLLUM, E. v.: "Food Nutrition and Health," Baltimore, 1927. 

 : Fundamentals of nutrition. Internal. Clinics, 2: 1 (1932). 



and N. Simmonds: "Newer Knowledge of Nutrition," New York, 



1925. 

 Sherman, H. C, and S. L. Smith: "The Vitamins," New York, 1931. 

 Weston, W., et al.: Vitamin chart, Ind. Eng. Chem., Neics Ed., 10: 30 



(1932). 



