Lectures on the electro-magnetic telegraph, with an historical account of its rise and progress, containing a list of the number of telegraphic lines of the world.

Lectures on the electro-magnetic telegraph, with an historical account of its rise and progress, containing a list of the number of telegraphic lines of the world.

Description:

ix, 140, 46 p. illus., plates. 23 cm.

Date Issued: 1852.
Collection: Philadelphia,: R. W. Barnard, printer,
Subject Topics:
Language: eng
Type: text