Note 34 — HISTORY OF TELEGRAPHS, (continued 2)
Reading edition
From the Repertory of Patent Inventions, No. lxvii. New Series, London, July, 1839.—Sealed, July 4th, 1888.
Reading edition
From the Repertory of Patent Inventions, No. lxvii. New Series, London, July, 1839.—Sealed, July 4th, 1888.