32 PROBLEMS IN PHOTOSYNTHESIS 



tion of chlorophyll does not seem to give any noteworthy contribution to the 

 elucidation of either the energetics or the chemistry of photosynthesis. Broadly 

 speaking, this type of work — however interesting it may be from other points 

 of view — seems to end in a blind alley when we have photosynthesis in mind. 

 Research done with chlorophyll in vitro, in particular, leads to conclusions 

 which may by no means be of any importance to the process of photosyn- 

 thesis in the living plant. 



In the following chapter we shall deal with quite different trains of thought 

 and research. In contrast to what has been discussed so far, we shall meet 

 with classical experiments based upon classical chemistry and physics worked 

 out with an astonishingly high degree of precision. No hypotheses will be 

 encountered, but only facts forming the basis of a real theory. By means of 

 this theory, the energetical aspects of photosynthesis have been satisfactorily 

 explained and clarified. 



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