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Laws of the state of New York, in relation to the Erie and Champlain canals; together with the annual reports of the canal commission ers, and other ... works. Also, correct maps delineating the rou
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1825 Excerpt: ...work, by tenons and mortises, and strengthened by braces. As tenons soon rot and give way, it might have been made on a better and more durable...
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1825 Excerpt: ...work, by tenons and mortises, and strengthened by braces. As tenons soon rot and give way, it might have been made on a better and more durable construction, with knees and bolts, in the manner of shipbuilding. At the upper end of the aqueduct is a lock of 12 feet lift. Mr. Weston, an English engineer, took the levels of the whole length of the line of this canal, part of the way on two routes. He estimated the expense of making it, at 100,000Z. sterling, The company went on to make the canal, without any further aid from any European engineer, and found Mr. Weston's levels to be correct. Over Syms' river is an aqueduct, of which the abutments are 120 feet apart, with three intervening piers. The water in the aqueduct is 30 feet higher than the water in the stream below. These aqueducts all afford convenient waste-weirs. When the water is not drawn off from the canal at the commencement of winter, the expansion of its freezing spreads and injures the timbers of the aqueducts; wherefore it is the practice, just before the winter sets in, to draw off about one-third of the water. Half a mile above the last mentioned aqueduct, is deep cut ting, 40 rods in length, through loose sand and gravel. In the deepest part, the excavation is 20 feet below the natural surface Champitiuca-of the earth; and the part excavated, is here, from 90 to 100 feet nal'-in width, at the top. The earth was chiefly carried away in wheel-barrows, some in carts, to an embankment just above, on the right side. Haifa mile higher up, the earth is very porous. and on the right side the water leaks out through or under an embankment: this might have been prevented by putting two or three feet of water-tight stuff in the bottom of the canal. Near this place are two water-gates, by which the w...
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