Books by Otis Tuftman Mason:
Books in the extended shelves:
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Mason, Otis Tuftman, 1838-1908: Historical sketch of Henry's contribution to the electro-magnetic telegraph. (Govt. Print. Off., 1877), also by Charles C. Abbott, M. Morin, Charles Rau, Otis T. Mason, William B. Taylor, and Smithsonian Institution (page images at HathiTrust)
Find more by Otis Tuftman Mason at your library, or elsewhere.