Jones 50-line switchboard, 1879.
1879
Edison telephone peg switchboard and pegs, 1879
1879
Wall telephone using a Blake transmitter, 1880-1890
1880-1890
Experimental Form 1 (Licence to use Wireless Telegraph), 1905
1905
Pair of Bell telephones, 1878
1878
Zither switch with open-wire multiple and two-motion ratchet drive, 1894
1894
Strowger step-by-step automatic telephone exchange switch, 1897-1898
1897-1898
Telephone receivers with wooden handles, 1877-1902
1877-1902
Facsimile 1865 homemade telephone, 1888
1888
Wall telephone with Blake transmitter, 1880-1900
1880-1900
Crossley telephone receiver, 1880
1880
Thomson's mirror galvanometer, 1858
1858
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Thomson (Lord Kelvin) double curb transmitter, 1858
1858
'Thunder pump' magneto-electric device, 1856
1856
Portable double-needle telegraph and test set, 1850
1850
Letter to The Atlantic Telegraph Company, 1859
1859
Coherer, coarse iron turnings, 1894-1904
1894-1904
William Thomson's marine mirror galvanometer, 1850-1900
1854
Filings coherer, glass tube formed into bulbs at each end at right angles, 1899
1899
Double coherer (experimental), 1895-1906
1895-1906
Bas-relief head and shoulders of Guglielmo Marconi, 1903
1903
Filings coherer, glass tube, 1898
1898
Dog ornament moulded from gutta percha, 1850-1900
1850-1900
Whitehouse's induction coil, 1858
1858
Receiving ‘jigger’ used by the Marconi Company, 1898
1898
Embossing telegraph receiver 1878-1900
1878-1900
Flat steel-spring (or watch-spring) coherer, 1894
1894
Filings coherer, small glass tube with bulb at one end, 1894-1904
1894-1904
Silver thimble, used to pass a current through the 1866 Transatlantic cable, 1860-1866
1860-1866
Filings coherer, glass tube capped at ends, 1894-1904
1894-1904
Chart of the Atlantic showing proposed course of the Atlantic Cable, 1856-1857
1856-1857
Pioneers of Electric Telegraphy at the British Association
1865
Lead weight marked 'Reid' from the first cross-Channel telegraph cable, 1850.
1850
Filings coherer, glass tube bent at 45-degree angle at one end to form side-pocket, 1898
1898
Coherer, with steel needle inside part-wound with copper wire, 1894-1904
1894-1904
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Iron borings coherer (Branly type), 1894
1894
Horseshoe magnet and keep used with experimental form of magnetic detector, 1900-1910
1900-1910
Portrait bust of Lord Kelvin, 1896
1896
Branly tripod coherer, 1900-1910
1900-1910
Coherer, with several needles, 1894-1904
1894-1904
Original wheel or steel-disc coherer, 1902
1902
Watch and wrist strap
1908
Watch by Waltham with a Dennison case
1904
Gold lever watch by George Blackie
1873
Watch by Sir John Bennett
1884
Chronometer escapement in domed glazed case by William T. Heyes
1903
Watch made for the 1851 Great Exhibition by Alexander Watkins
1851
Watch with complications and minute repeating by Samuel Smith & Son
1899