VOL. 12 (1953) ENERGY CYCLE AND QUANTUM YIELD IN PHOTOSYNTHESIS 



/^O in^^ChUlla cells /8/)ou. 



351 





JoTTv. - 30 seco-nds 

 f 1 





J^-'LnmiJ, 



Fig. 4. Photograph of work sheet obtained with Linienschreiber recording of galvanometric obser- 

 vations on the photosynthetic cycle, witli respiration compensated (also illustration of method of 

 calibrating electrodes for response to oxygen pressure change). 



90/ilChlorella /135 ml 

 20 °C 



0.925 37 r f 



0.900 36 



0.875 35 



0.650 34 



Lichtreaktion 



Kompensation 

 -o o- 



1 -»-RuckreaMion 



wieder Kompensation 



>i-=1d 



>¥=^-'' 



(=1.5miterste5" RUckreacfionJ 



0.825 33 



I] 1+ roi (.5mmVs) 



•'/ 



r Z 3"/ 4- 



-Konsiant weisses Licht- 



Fig. 5. The photosynthetic cycle, with respiration compensated (galvanometer read visually). 



photosynthetic cycle under various conditions, as observed either without (Fig. 2) or 

 with (Figs. 3, 4, 5) compensation of respiration by a supplementary source of light. 



References p. 355. 



