 | Edward Dean Adams - 1927 - 486 halaman
...rapids, will be about one hundred and sixty feet. The distance between this point and the outlet of Lake Erie is occupied by nearly uniform soft layers...uniform declivity of about ten feet in the mile, or one-third less than the present declivity in the bed of the river from the falls to Lewiston. From... | |
 | Edward Dean Adams - 1927 - 484 halaman
...hundred and sixty feet. The distance between this point and the outlet of Lake Erie is occupied bv nearly uniform soft layers ; and after a partial wearing...uniform declivity of about ten feet in the mile, or one-third less than the present declivity in the bed of the river from the falls to Lewiston. From... | |
 | 1844 - 580 halaman
...is occupied by nearly uniform soft layers, and after a partial wearing down of the limestone fonning the rapids, the descent will be equally distributed...in the bed of the river from the falls to Lewiston. Prom the nature of the bed of the river for fifteen miles below Lake Erie, it may be doubted whether... | |
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Lake Erie is occupied by nearly uniform soft layers, and after a partial wearing down of the limestone forming the rapids, the descent will be equally distributed over the whole extent of sixteen miles, giving a uniform declivity of about ten feet in... 