STRUCTURE OF PHOTOSYNTHETIC SULFUR BACTERIA 83 



Fig. 8. Electron micrograph of a thin section of Chromatiiini strain D grown 

 at 7000 foot candles of incident light. Bar equals l/u. (See text for details). 



Fig. 9. Electron micrograph of a thin section of Chromatiiim strain D grown 

 at 7000 foot candles of incident light. Bar equals 1^. (See text for details). 



