Modern practice of the electric telegraph : a handbook for electricians and operators (1874)
Pope, Frank L., 1840-1895 · New York : D. Van Nostrand · leaf 178
FACTUM … MANUFaCTUBZES OF ALL XIHDS OF Electrical Instruments, We keep in stock a full assortment of Standard MorseInstruments, Line Wire, Insulators, Voltaic Batteries, Tools,Office Supplies, Copper Office Wire, Magnet Wire, CallBells, &c. Among our specialties are : I. Grays Automatic Printer, for…
Telegraph
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