Hangman's rope, England, 1870-1888
1870-1888
Tower's handcuffs
1882-1890
Model of a MacPherson-type ambulance, England, 1851-1900
1851-1900
Paddlewheel used by James Joule
c1860
Cupriferous sandstone from Schweinkopf
before 1889
Mauveine acetate dye in microcrystalline form in a cork-stoppered glass bottle
1906
Sample of Bessemer Steel
1860
Horological gravers
1850-1900
Horological graver with narrow lozenge-shaped profile and wooden handle by unknown maker
1850-1900
horological rubber
1850-1900
Granular microphone in bamboo tube, 1878-1890
1878-1890
Powdered graphite microphone, 1878-1890
1878-1890
Powdered graphite microphone, 1878-1890
1878-1890
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
Wall telephone with Blake transmitter, 1880-1900
1880-1900
Crossley telephone receiver, 1880
1880
Portable double-needle telegraph and test set, 1850
1850
Coherer, coarse iron turnings, 1894-1904
1894-1904
Filings coherer, glass tube formed into bulbs at each end at right angles, 1899
1899
Double coherer (experimental), 1895-1906
1895-1906
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
Dog ornament moulded from gutta percha, 1850-1900
1850-1900
Whitehouse's induction coil, 1858
1858
Flat steel-spring (or watch-spring) coherer, 1894
1894
Filings coherer, small glass tube with bulb at one end, 1894-1904
1894-1904
Iron borings coherer (Branly type), 1894
1894
Filings coherer, glass tube capped at ends, 1894-1904
1894-1904
Silver thimble, used to pass a current through the 1866 Transatlantic cable, 1860-1866
1860-1866
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
Coherer, with several needles, 1894-1904
1894-1904
Original wheel or steel-disc coherer, 1902
1902
Spark gap or knob coherer, 1889
1889
Holmes' arc lamp from South Foreland Lighthouse, about 1860-80.
1860-1880
Pendant in form of plastic model of "Heinz" gherkin
1885-1895
Beale-type microscope
1871-1900
Cast iron hospital bed
1851-1900
Ceramic pot lid for Beddard's Belgravia tooth paste
1860-1900
Four ivory charity collection tallies
1863-1880
Stuffed "princely Mastigure" lizard amulet
1881-1900
Rabbit's foot amulet
1860-1905