440 PHOTOMECHANICAL CONSIDERATIONS 



12. Wassink, E. C, Katz, E,, and Dorrestein, R., Photosy-nthesis and fluores- 

 cence of bacteriochlorophyll mThiorhoda.ceae. Enzywologia, 10,285 (1942). 



13. Larsen, H., Yocum, E. C, and van Niel, C. B., On the energetics of the 

 photosyntheses in green sulfur bacteria. J. Gen. Physiol., 36, 161 (1952). 



