Whirling Psychrometer, 1950-1953
1950-1953
Motorola StarTAC mobile phone, 1997.
1997
Excell M2 Pocketphone, 1987.
1987
Filings coherer, glass tube bent into U-shape at one end, 1894-1904
1894-1904
Experimental carbon block microphone, 1878-1890
1878-1890
Filings coherer, glass tube almost of taper shape, 1894-1904
1894-1904
Kodak 'Brownie' Camera, about 1955
1953-1958
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Filings coherer, glass tube containing powdered copper, bulb at one end, 1894-1904
1894-1904
Filter used to produce radioactive water
1901-1930
Specimen of lightweight transatlantic telephone cable, 1961
1961
Hertzian receiving resonator, 1890-1894
1890-1894
Filings coherer, Lodge pattern with two wires inserted into bulb at one end, 1894-1904
1894-1904
Plaster death mask of J.J. Lister F.R.S. (1786-1869)
1869-1927
Submarine repeater pentode P.O. type 10P, 1950-1970
195-1970
Two Perkins 'tractors'
1795-1805
Coherer, narrow-bore glass tube, 1894-1904
1894-1904
Mullard video output pentode, T.S.P.4, 1920-1936
1920-1936
Powdered graphite microphone, 1878-1890
1878-1890
Filings coherer, small glass tube with bulb at one end and cap of red sealing wax at other end, 1898
1898
Sector by Charles Whitwell
1600-11
Demonstration model with intrauterine device and inserter
1960-1979
Experimental carbon pencil microphone, 1878-1890
1878-1890
Gecophone broadcast receiver, model B.C 3200, 1924
1924
Filings coherer, glass tube with side-pocket attached to mounting bracket, 1894-1904
1894-1904
Filings coherer, glass tube bent into U-shape at one end with bulb to form side-pocket on mounting bracket with terminals, 1894-1904
1894-1904
wheel cutting machine
1668-1672 Probable
Pentex production unit: B switch, 1965-1971
1965-1971
Filings coherer, glass tube formed into T-shape at one end and bent round into U-shape at other end with bulb, 1899
1899
Henley's magneto electric double needle telegraph, 1848-1852
1848-1852
Coherer, with several needles in contact with crystal, 1894-1904
1894-1904
Filing coherer, glass tube, fitted on to mounting bracket with terminals, 1894-1904
1894-1904
horological gravers
1850-1900
Experimental microphone, 1878-1890
1878-1890
Filings coherer, small glass tube with bulb at one end, 1894-1904
1894-1904
Experimental microphones with carbon pencils and cups, 1878-1890
1878-1890
Filings coherer, glass tube with side pocket mounted on cylindrical rod with brass screw terminals at ends, 1894-1904
1894-1904
Submerged repeater amplifier, 1967
1967
Wheatstone's portable ABC telegraph, 1858
1858
Filings coherer, glass tube curved into near U-shape at one end with coil winding at other end, 1894-1904
1894-1904
Filings coherer, Lodge pattern, 1895-1900
1895-1900
Granular microphone in glass tube, 1878-1890
1878-1890
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Crossley table telephone, 1879
1879
Portrait bust of Sir Richard Moon
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
Yorkshire Main Sidings First Aid Box
1900-1920
Quinine pills in box
Wooden prosthetic hand with rigid fingers
circa 1920
Pendant bottle
1910-1933