Copy of the Receiver and Alarm Call of Schilling's Electric Telegraph, 1870-1877
1870-1877
Set of 8 brass handled
1890
Iron borings coherer (Branly type), 1894
1894
A steam hammer at work
1871
Pair-cased pocket watch in pinchbeck and leather outer casing with verge escapement
1705-1737
'Haystack' Boiler, 1775-1799
1775-1799 (original); 1900-1907 (model)
'Wagon' Boiler, 19th Century
1801-1840 (original); 1901 (model)
Paddlewheel used by James Joule
c1860
Cupriferous sandstone from Schweinkopf
before 1889
Felt and Tarrant Comptometer, 1887.
circa 1900
Jones 50-line switchboard, 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
Granular microphone in bamboo tube, 1878-1890
1878-1890
Zither switch with open-wire multiple and two-motion ratchet drive, 1894
1894
Powdered graphite microphone, 1878-1890
1878-1890
Powdered graphite microphone, 1878-1890
1878-1890
Edison carbon button transmitter No. 32, 1878
1878
Section of cross-Channel telephone cable, 1897
1897
Experimental microphone using steel needles and gas carbon, 1878-1890
1878-1890
Telephone receivers with wooden handles, 1877-1902
1877-1902
Facsimile 1865 homemade telephone, 1888
1888
Wall telephone with Blake transmitter, 1880-1900
1880-1900
Bell Transmitter with Membrane Diaphragm, 1875-1877
1875-1877
Crossley telephone receiver, 1880
1880
Thomson (Lord Kelvin) double curb transmitter, 1858
1858
Coherer, coarse iron turnings, 1894-1904
1894-1904
Filings coherer, glass tube formed into bulbs at each end at right angles, 1899
1899
Cell used in interruptor circuit, 1875-1890
1875-1890
Polarized 'guillotine' relay, 1862-1866
1862-1866
Clockwork interruptor, once owned by David Hughes, 1875-1880
1875-1880
Filings coherer, glass tube, 1898
1898
Copper earthing tube believed to have been used by Marconi, 1890-1897
1890-1897
Magneto-electrometer, 1857
1857
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
Pioneers of Electric Telegraphy at the British Association
1865
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
Iron borings coherer (Branly type), 1894
1894
Builder's whole, rigged model, of SS 'Great Eastern', 1853-1857
1853-1857
Coherer, with several needles, 1894-1904
1894-1904
Original wheel or steel-disc coherer, 1902
1902
Spark gap or knob coherer, 1889
1889