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., joint author.
Publisher: W. J. Johnston
Published: 1885
Place of publication: New York
Language: eng
Number of pages: 128
Subjects: Telegraph -- Quadruplex system