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Engineers' and mechanics' pocket-book .. (1881)
Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 174
C17.) ARCS.To Describe a G-otbic A.rc—-Fig. 17.O. ^o (18.)Engineering · Mechanical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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