CHEMICAL ACTION. 117 



is brought again to the surface, and we develope from 

 it those powers by which it was formed. 



In the fire which gives comfort to our homes in the 

 furnace which generates force for the purposes of manu- 

 facture, or to propel the railway engine and its pon- 

 derous train in the gas with which we illumine our streets 

 and gladden during the long winter nights our apart- 

 ments, we are developing that heat and light which fell 

 upon the earth with all its quickening influences mil- 

 lions of ages before yet the Creator had called into 

 existence the monarch Man, for whose necessities these 

 wondrous formations were designed. 



