THE LAWS OF PLANT GROWTH UNCHANGEABLE. 263 



spects; as those of gravitation; and of heat and of other 

 chemical action; and of those physical laws which regulate 

 all matter. The processes of vegetable growth can all be 

 explained as subject to these natural laws, which are un- 

 changeable; omnipotent; and eternal; as the great source 

 from which they received their first impulse. 



