316 LIGHT AND LIFE 



into organic molecules. It is a pleasure to pay tribute to the magni- 

 ficent work of Calvin and co-workers. But, in a way, all that already 

 belongs to the past; it is known. And science has the habit of con- 

 tinuing from what is known to the unknown. From here it has 

 become evident that one of the fundamental, as yet unsolved, aspects 

 of the photosynthetic mechanism is the first step, the conversion of 

 light into chemical energy. From what I have seen of the program 

 of Session IV, it seems that this is largely what the session will be 

 occupied with. It is a pleasure to announce that the first paper in 

 this session will be given by Dr. Melvin Calvin. 



