310 «J. LeConte on the Correlation of Forces. 
~ upon chemical compounds—mineral matter. They must feed upon 
organic matter, which organic matter in its partial decomposition 
furnishes the force necessary for organization. If so, then this de- 
composition, as in the case of germination, must be attended 
gress, 
by my brother Prof. John LeConte, and published in the last 
proceedings and in the American Journal of Science and Arts, 
vol. 24, p. 317, will eventually furnish the means of solving this 
oO 
+ counteracted the effect of a heat of the sun. 
h, Etolated plants, or plants artificially blanched by exclu- 
ight, exhibit the same phenomena and for the same 
‘hese plants cannot receive their, organizing force 
