Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 104
f the uew wires. The rails aresupported in centre of the span by a casting fixed on a short post,whose end has fixed on it a cast iron washer, resting on the topnut of the bracing rod. That bracing rod goes itself two inches inthe post, which has a hole drilled in it to receive it. When theloaded… … material for such a tramway, carrying trains of 10, 20, or -lO tons ormore cost $2,000 a mile. The labor to work that material in the shopand put it in the field on uniform ground, cost ^1,000 per mile; totalcost of the tramway S3,000 per mile. This estimate is made with asupposition that the…
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