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must bear no proportion to that flowing from such reservoirs 
to the sea. In Africa, the natives are said to find water at 
great depths in the deserts. In nearly all other countries 
* At the Monkwearmouth Colliery, in the County of Durham, a spring was 
struck at a depth of 300 feet, after passing through the magnesian limestone, 
and the lower new red sandstone: It poured in water at the rate of 3,000 
gallons per minute. At a depth of 1,000 feet a fresh spring was found, also 
very considerable, which obliged the proprietors to erect additional machinery, 
to clear the workings of water. Instances of this kind might be multiplied. 
