Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 495
ns are immediatelyvisible. The Brandywine Lighthouse is erected upon the shoal of that name at the mouth of DelawareBay, and was lighted in 1851. It stands upon nine piles of 5^ inches diam-eter, tapering from the screw (which is .3 feet diameter) to the top, where thediameter is reduced to 4… … Comparative Magnitude of Lighthouses erected on the Screw-Pile system.Scale 50 feet to 1 inch.
Mechanical engineering · Mechanics · Engineering
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