The electro magnetic telegraph
Subtitle: with an historical account of its rise, progress, and present condition.
By: Also, practical suggestions in regard to insulation, and protection from the effects of lightning.  Together with an appendix, containing several important telegraphic decisions and laws.  By Laurence Turnbull.
Edition: 2d ed., rev. and improved.  Illustrated by numerous engravings.
Publisher: A. Hart
Published: 1853
Place of publication: Philadelphia
Language: eng
Number of pages: 264
Subjects: Telegraph