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BIOLOGICAL EFFECTS OF RADIATION 



88. WuRMSER, R. Action sur la chlorophylle des radiations de differentes longueurs 

 d'onde. Compt. Rend. Acad. Sci. [Paris] 170: 1610-1612. 1920. [See bibli- 

 ographies in articles by the same author as follows: Arch. Phys. Biol. 1 (3): 33- 

 141; Recherches sur I'assimilation chlorophyllienne. Vigot Freres; Paris, 1921; 

 Oxidations et reductions. Les Presses Universitaires de France; Paris, 1930.] 



89. ZiMMERMANN, A. Die Morphologie und Physiologie der Pflanzenzelle. Breslau, 

 1887. 



90. ZiRKLE, C. The Structure of the chloroplast in certain higher plants. Amer. 

 Jour. Bot. 13: 301-320, 321-341. 1926. 



Manuscript received by the editor July, 1933. 



