Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 495
s 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-A- 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. Coral Reef.
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
