 | John Mactaggart - 1829 - 378 стор.
...point of view ; they do away with lines of extended excavations through a thick- wooded wilderness. In several instances, a dam not more than 24 feet...still sheet above it for a. distance of more than 20 miles. The dams also back the waters up creeks, ravines, and valleys ; and, instead of making one... | |
 | 1829 - 682 стор.
...excavations through a thickwooded wilderness. In several instances, a dam not more than twentyfour feet high, and 180 feet wide, will throw the rapids...above it for a distance of more than twenty miles. The dams also back the waters up creeks, ravines, and valleys; and, instead of making one canal, they... | |
 | Joseph Bouchette - 1831 - 858 стор.
...country. " In several instances, a dam not more than twenty-four feet high and one hundred and eighty feet wide will throw the rapids and rivers into a...above it for a distance of more than twenty miles. The dams also back the waters up creeks, ravines, and valleys ; and, instead of making one canal, they... | |
 | William Kingsford - 1865 - 208 стор.
...and where no natural connection existed one was made. The rapid thus becomes still water and in some instances a dam not more than 24 feet high and 180 feet wide created quiet waters for a distance of more than 20 miles. Undoubtedly this mode of conslructkm drowned... | |
 | Robert Walsh - 1832 - 732 стор.
...instances, a dam not; more than twenty-four feet high, 420 Bouchette's British North America. [June, and 180 feet wide, will throw the rapids and rivers into a still sheet above it, for more than twenty miles. The dams also back the waters up creeks, ravines, and valleys; and instead... | |
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In several instances, a dam not more than twentyfour feet high, and 180 feet wide, will throw the rapids and rivers into a still sheet above it for a distance of more than twenty miles. 