 | John Bristed - 1818 - 534 str.
...the height to be ascended, whilst the supply of water becomes less in the same proportion. Nor does the chain of mountains, through the whole extent where...afford a single pond, lake, or natural reservoir. Indeed, except in the swamps along the southern sea-coast, no lake is to be found in the United States... | |
 | 1808 - 754 str.
...the height to be ascended, whilst the supply of water becomes less in the same proportion. Nor does the chain of mountains through the whole extent, where...divides the Atlantic from the western rivers, afford n single pond, lake, or natural reservoir. It may be added, as a general feature uf American geography,... | |
 | 1819 - 852 str.
...the height to be ascended, whilst the supply of water becomes less in the same proportion. Nor does the chain of mountains through the whole extent, where it divides the Atlantic from the western river*, afford a single pond, lake or natural reservoir, it mav he add ed, as a general feature of... | |
 | 1808 - 674 str.
...supply of water becomes less in the fame proportion. Nor does th« chain of mountains through the whol« extent, where it divides the Atlantic from the western rivers, afford a single pond, lake, -or iratnral reservoir. It may be added, as a general feature of American geography, that except in the... | |
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The impracticability arises from the principle of lock navigation, which, in order to effect the ascent, requires a greater supply of water in proportion to the height to be ascended, whilst the supply of water becomes less in the same proportion. Nor... 
