electro-telegraphic

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Electro-telegraphic Longitude Operations Executed During The Years 1894-95-96: The Indo-european Arcs From Karachi To Greenwich from $25.95	Illustrated Catalogue Of Electro-medical Instruments Manufactured And Sold By Thomas Hall, Electrician, Manufacturer And Importer Of Magnetic, ... Telegraphic Instruments, Of All Descriptions from $15.95
Illustrated Catalogue of Electro-medical Instruments: Manufactured and Sold by Thomas Hall, Successor to Palmer & Hall, Electrician, Manufacturer and ... Galvanic, and Telegraphic Instruments from $15.95	Illustrated Catalogue of Electro-Medical Instruments: Manufactured and Sold by Thomas Hall, Successor to Palmer and Hall, Electrician, Manufacturer and Importer of Magnetic Galvanic, and Telegraphic I from $29.97
The American Electro Magnetic Telegraph from $4.95	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. 1852 [Leather Bound] from $59.05
Examination of the Telegraphic Apparatus and the Processes in Telegraphy from $18.95