'^The Relation between Water-Powers and Forests 51 



of 5S25 000 000 to $30,000,000, and considered only on a 



^nd comorehensive plans are adopted for development anu 



by being sup^plied with electncity at reasonable rates. 



Soeaking generally, water-powers are valuable m proportion 

 to the^arniuntoT water available at the periods of low water, 



onlv numerous, but largely beyond the control of man. 



' The chief features affecting the uniformly -^^ tot^lX^ther 

 of flow are: (a) Drainage Area, {b) Shape ^f Area, whether 

 ^omplct or narrow and long, (c) Slope o ^^y.^^^ 

 oi soil, (e) Rainfall. (/) Evaporation. (§) Cond ^lon of sod 

 whether cultivated, pasture or woodland, (h) Storage, natural 

 or artificial (i) Control of run-off from storage. 



I will be noted that all but the last three items are natural 

 conditions, and therefore beyond the control of man. 



. Howe;er, the large -ater-power developments which have 

 hPPn attempted to the present have been chiefly made on large 

 ?versand^?he pinch of low water has not been so serious as will 

 be th; case in S,e future when increased values wi 1 induce the 



separately. Ont..rio. In this district we have the 



isiSISfiSi 



disJnct will ne^fsanly have to rely on N.agara as .ts ch.ef source 



°' t^tJlZo.. 0.T.«>0. We find .here an enUrely 

 different natuS condition, and owing to th,s an excepfonal 



