24 THE SYNTHESIS OF CARBOHYDRATES 



cannot be attained unless the illumination be of sufficient 

 intensity and the carbon dioxide be adequate in amount. 



-238 



157 



-102 



E 



|o 70 



548 

 238 



-149 



-102 



-10 +10 20 30 40 

 Temp: 



FIG. 5. 



These maximal amounts of assimilation increase rapidly with 

 rising temperatures but at the higher temperatures the initial 

 rate for that temperature cannot be maintained for long but 



