Publisher's Note 



The publication in a single volume of the EngUsh trans- 

 lations of Lumiere et Vegetation, by Jean Terrien and Georges 

 Truffaut, and VEnergie Chlorophyllienne, by Jules Carles, 

 was not undertaken without consultation with the authors 

 and the French pubhshers. The advantages of combining 

 these two small books into a comprehensive whole were 

 fully recognized, and it was agreed that excessive over- 

 lapping should be avoided by omitting the less explicit of any 

 two passages covering the same ground. No information has, 

 however, been omitted and a few small repetitions have been 

 allowed to remain where their removal would have neces- 

 sitated rewriting the text. A single index has been provided 

 to cover both works. 



