Edison Phonoplex System of Telegraphy [cover title]
New York: Edison Phonoplex / Edison Manufacturing Company c1892. First Edition. 38, [2 (blank)] pages. 8vo. Publisher's tan wrappers printed in black. Stapled with wrappers affixed to the text block. Six figures in the text, plus additional illustrations in several of the advertisements. The address for Edison Phonoplex "Edison Building..... More

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