1206 AUTHOR INDEX 



Tswett, M. : Fluorescence of chloroplasts under the microscope, 806. 



U 



Ursprung, A.: Photosynthesis in near ultraviolet, 1153. 



Van der Honert, T. H. See Honert, T. H. van der. 



Van der Paauw, P. See Paauw, P. van der. 



Van der Veen, R. See Veen, R. van der. 



Van Norman, R. W., French, C. S., and Macdowall, F. D. H.: Absorption spectra of red 

 algae, 692, 699; fluorescence spectra of extracts from red algae, 799. See alto 

 French, C. S. 



Van Rysselberghe, P., Alkire, G. I., and McGee, J. M.: Electrolytic reduction of COj, 

 939. 



Vasiliev, G. See Kostychev, S. P. 



Vavilov, S. I., Galanin, M. D., and Pekerman, F. M.: Transfer of electronic energy be- 

 tween molecules, 758-759; fluorescence quenching through energy transfer to 

 nonfluorescent pigments, 778. 



Veen, R. van der: Thermal conductivity as method of measuring photosynthesis, 853; 

 kink in light curve near compensation point, 1116; a mechanism of photosynthesis 

 involving formation of high energy phosphates by back reactions, 1116-1117. 



Verduin, J.: Mutual interference of pores in diffusion through septum, 913-914. 



and Loomis, W. E.: CO2 concentration near ground, 902. 



Vermeulen, D., Wassink, E. C., and Reman, G. H.: Absorption spectra of purple bac- 

 teria, 692, 693; spectrophotometric study of bacteriochlorophyll fluorescence, 

 747, 748; fluorescence spectrum of Chlorella and Chromatium, 806, 807, 809, 810; 

 quantum yield of fluorescence in Chlorella and Chromatium, 813; its dependence 

 on wave length, 813-814; action spectrum of growth of purple bacteria, inactivity 

 of carotenoids, 1188. See also Wassink, E. C. 



Voerkel, S. H.: Chloroplast movements in Funaria, 679-682. 



Volkov, A.: Discovery of proportionality between photosynthesis and light intensity, 

 964. 



von Guttenberg, M. See Guttenberg, M. von. 



von Richter, A. See Richter, A. von. 



W 



Wakkie, J. G.: Absorption spectrum of chlorophyll in different solvents, 637, 641; at 

 high concentration, 651; fluorescence of chlorophyll emulsions, 776. 



Warburg, O.: Use of unicellular algae for the study of photosynthesis, 833-834; mano- 

 metric methods of measuring photosynthesis, 847-850; CO2 curve of Chlorella, 

 893, 906, 908; effect of O2 pressure on photosynthesis, 960- light curves of 

 Chlorella, 967; second series of quantum yield measurements, 1098-1107. 



and Burk, D. (also Schocken, V., and Hendricks, S.) : Third series of quantum yield 



determinations, by the two-vessel method, 1104-1109, 1110, 1132. 



, Burk, D., Schocken, V., Korzenovsky, M., and Hendricks, S. B.: No light effect 



on respiration in Chlorella when CO2 is effectively removed, 901. 



and Negelein, E.: Early curvature of light curves in dense suspension of Chlorella, 



980; first determination of quantum yield of photosynthesis, 1085-1086, 1088; 

 quantum yields in colored light, 1 147. 



