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1. The telegraph cable. Historical view of the art of electro-magnetic telegraphing in connection with the telegraph cable, and its insulation by gutta percha. An argument addressed to the U.S. Senate Committee on patents, etc., by George Griscom ... in answer to the arguments filed on behalf of G.B. Simpson's claims.

Notes:: 40 p. col. fold. pl. 23 1/2cm.
Data Provider:: University of Michigan. Libraries
Collection:: Philadelphia,: King & Baird, printers, and Ann Arbor, Michigan: University of Michigan Library