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Henry Savage Sweetman: The man who uncovered Ireland’s medieval history
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Catalogue reference: MFC 1/124
This record is about the 4 items extracted from J 90/1304. Four diagrams of telegraphic equipment. (1) [19th... dating from [1842]-1863 in the series Public Record Office: Maps and plans extracted to flat storage from various series.... It is held at The National Archives, Kew.
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4 items extracted from J 90/1304. Four diagrams of telegraphic equipment. (1) [19th century] Diagram of transmitter and receiver for mechanical signal. (2) Diagram of telegraphic signals equipment: specification of John George Hughes, 9 June 1842. (3)-(4) Diagram of communicating signals equipment (two sheets): specification of Frederic Newton Gisborne, 19 December 1863. All exhibits in the Chancery cause Patent Marine Invention Co v Weir (1872 P 190).
MFC 1
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4 items extracted from J 90/1304. Four diagrams of telegraphic equipment. (1) [19th...
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