The quadruplex.
By: By Wm. Maver, jr., and Minor M. Davis. With chapters on the dynamo-electric machine in relation to the quadruplex. The practical working of the quadruplex. Telegraph repeaters, and the Wheatstone automatic telegraph. By Wm. Maver, jr.
Contributors: Davis, Minor M.
Publisher: W.J. Johnston
Published: 1890
Place of publication: New York
Language: eng
Number of pages: 128
Subjects: Telegraph -- Quadruplex system