BROOK'S TOOLS AND ITS WORK 237 



make their mighty deltas, brooks their tiny ones. 

 Rivers overflow their banks Uke Father Nile, and 

 the hearts of the people are made glad or sad 

 according to their different points of view ; rivers 

 plunge over precipices like Yosemite and Niagara 

 and rage through rocky chasms, as does the Colo- 

 rado. So do our smaller streams in their smaller 

 fashion. Their origin, their methods,, their yearly, 

 round of moil and toil, their alternations of flood 

 and ebb are very similar. Their tools, though dif- 

 ferent in size, are of the same pattern. Strive as 

 they may from day to day their work is never done. 



