OCR Text |
Show The amount of water pouring over Niagara falls has been estimated at 100,000,000 tons per hour, and ils perpendicular descent may be taken at 150 feet, without considering the rapids, which represent a further fall of 150 loot. The force represented by the principal fall alone amounts to IG.SOO.OOO horse power, an amount which if it had to be produced by steam would necessitate an expenditure expend-iture of not less than 206,000,000 tons of coal per annum, taking the consumption of coal at lour pounds per horse power per hour. In other words, all the coal raised throughout the worid would barely suffice to produce pro-duce the amount of power that annually annu-ally runs to waste at this wonderful : fall. |