'A short sketch on telegraphic communication with a plan for improving the semaphore now used at the Admiralty and a design for a communicating Tablet to answer without a book of reference at short distances'.

'A short sketch on telegraphic communication with a plan for improving the semaphore now used at the Admiralty and a design for a communicating Tablet to answer without a book of reference at short distances, by Lieutenant P Crane, ca.1820 (Formerly SM(P)176)

Object Details

ID: SIG/D/6
Type: Manuscript
Display location: Not on display
Date made: 1820-01-01 - ?; 1820
Credit: National Maritime Museum, Greenwich, London
Parts: Signals: Theory (Manuscript)