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Scientific American, Vol. 22, No. 25 (June 1870) (1870)

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An illustration from Scientific American, Vol. 22, No. 25 (June 1870), 1870, leaf 0
nt received In many localities, durable timber for fence posts or for sills though the main sills may have been procured of the best while surveying the approaches to his last and greatest de- j to a building is exceedingly scarce. And yet, there are so quality, at a large expense. We frequently… … SUSPENSION BRIDGE OVER THE ALLEGHANY RIVER AT PITTSBURGH, PA. as soon as basswood or buttonwood. When the ends of sleep under the able supervision of Mr. Washington A. Roebling, not be obtained, some other kind of timber may be had which ers are received in gains cut in the sills, the very ends are…

Patents · Assignor · Metallic · Parts · Consists · Metallic compression · Iron · Sheet metal · Letters patent · Erwin manufacturing · Dated june · Compression casting · Sulphuric acid · Patent office · Steam engine · Wrought iron

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