An essay on the different modes of communication by signals
Subtitle: containing an history of the progressive improvements in this art, from the first account of beacons to the most approved methods of telegraphic correspondence
By: by J. Gamble ...
Publisher: Printed by S. Gosnell, for W. Miller ...
Published: 1797
Place of publication: London
Language: eng
Number of pages: 124
Subjects: Signals and signaling; Early works to 1800
Notes: Signatures: [a]-b⁴ (-b4), B-Q⁴, R².