ABSORPTION SPECTRA OF CHLOROPHYLLS 



Rhodomicrobiunn vanniellii 



497 



300 



400 



500 600 700 



WAVELENGTH IN m/x 



800 



900 



1000 



Fig. 4. Absorption spectrum of a suspension of Rhodomic robin m vanuielii. 

 Spectrum obtained by the opal glass method on a Gary 14R spectrophotometer. 

 Prepared by Dr. J. M. Olson. 



GREEN BACTERIA 



400 



500 600 700 



WAVELENGTH IN mij. 



800 



Fig. 5. Absorption spectra of whole-cell suspensions of green bacteria. Solid 

 curve. Chloropseudonioims ethylicuw, strain 2K. Dashed curve, Chlorobiiim 

 fhiosiiIfafopJiiluDi, strain L. Spectra obtained by the opal glass method on a Gary 

 14R spectrophotometer. The spectrum of C. thiosidfatophilion, strain PM is 

 like that of Cps . ethyUcuui. Prepared by Dr. J. M. Olson. 



