chlorophyll Content. 



Table XVII. 



Assimilation Numbers of Leaves of the same Species 

 at different Times in Spring. 

 25" 5% COa 48,000 lux. 



9l 



Table XVIII. 

 Assimilation Numbers of Autumn Leaves. 



In many cases, as will be seen from the next table, the 



assimilation number increases at the beginning of autumn and 



diminishes later. 



Table XIX. 



Assknilation Nuuibers of the same Species at 



different Times in Autumn. 



