1058 



BIOLOGICAL EFFECT.^ OF RADIATION 



152. YosHii, YosHiji. Untersuchungen iiber die Temperatur-abhangigkeit der 

 Kohlensaure-assimilation bei Bohnen. Planta Arch. Wiss. Bot. 5: 681-695. 

 1928. 



153. ZscHEiLE, F. Paul. An improved method for the purification of chlorophylls 

 a and b; quantitative measurement of their absorption spectra; evidence for the 

 existence of a third component of chlorophyll. Bot. Gaz. 95: 529-561. 1934. 



154. ZscHEiLE, F. Paul. Investigation of the fluorescence spectra of chlorophylls 

 a and b in ether solution. Private communication. 



Manuscript received by the editor July, 1934. 



