78 OF THE COTYLEDONS. 



portion of heat. This indeed might have been ex- 

 pected, as it usually happens when oxygen gas is ab- 

 sorbed. So far seems to be the work of chemistry 

 alone ; at least we have no right to conclude that any 

 other agent interferes ; since hay, Avhen it happens to 

 imbibe moisture, exhibits nearly the same processes." 



I conceive the evolution of this heat may powerfully 

 further the progress of vegetation by stimulating the 

 vital principle of the embryo, till its leaves unfold and 

 assume their functions. It is necessary to observe, that 

 the above process equally takes place, whether the fa- 

 rinaceous particles be lodged in the bulk of the cotyle- 

 dons themselves, or compose a separate body called by 

 authors the albumen, as in grasses and corn. 



