Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 309
The diameter of the lowest course is 42 ft., that of the top course 16 ft., and the whole height is 138ft. The tower for a height of 26 ft. is solid. Immediately above the solid part the walls are 9i ft.thick, and they gradually diminish from this thickness to 2 ft. The material is granite, and the…
Mechanical engineering -- Dictionaries
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