‘Medico-Electrical Machine’ by Nairne and Blunt
1782-1793
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
Trough battery, 1801-1838
1801-1838
Thomson's mirror marine galvanometer, 1858
1858
Mirror galvanometer for the transatlantic telegraph, 1858
1858
Set of magnetical apparatus in case, by Adams
1790
Crookes vacuum tube containing a mineral sample
Campbell mutual standard by Cambridge Instrument Co.
1925-1930
Muirhead Clark standard cell
1888
Cambridge Instrument Co. "Round Compensator", 1890
1890
Dummy 100 volt dry battery, 1917
1917
Apparatus for earth induction
1887
Reflecting galvanometer by Siemens
Test set
1919-1920
Puluj electrical radiometer
Crookes vacuum tube for demonstrating the properties of cathode rays
Static electricity discharging tongs
Cavallo's electric multiplier
Plug type bridge box and galvanometer
Ebert's phosphorescent lamp
Crookes' tube for showing that heat is produced by cathode ray bombardment
1879-1888
Holtz 'restricted ray' vacuum tube
Crookes' tube for showing the phosphorescence of calcium sulphide
1879-1888
Magnets rotating round a current
1822-1856
Drysdale-Tinsley universal potentiometer
1910
Smee cell
1895
Siemens dynamometer
1900
Dummy 45-volt dry battery, 1917
1917
Crookes' tube for showing the phosphorescence of alumina
1879-1888
Bank of seven Weston standard cells
1893-1901
Rheostat, Kelvin Pattern
1888
Kelvin-White portable volt and amperemeter
1906
Callendar and Griffiths bridge No.4317
1906-1907
Mather electrostatic voltmeter
1890-1910
Siemens experimental galvanometer
1900
Ayrton & Mather electrostatic gravity voltmeter by R.W. Paul
1893-1901
Dummy 60-volt dry battery
1917
Variable capacitor calibrated in jars, No.7
Ammeter graduated to 100 amperes
1887
Bertin commutator
1886
Double tongue commutator used by Wheatstone
1861
Professor Ewing's magnetic tester, c.1895
1895
"10,000 legal ohms" resistance by Elliott Bros.
1881-1889
Sturgeon mercury break
1886
Direct reading two-range voltmeter
1900
Helical coils revolving round a magnet
1822-1856
Gold leaf electrometer with sliding condenser
1886
Kohlrausch Galvanometer
1900
Voltmeter graduated to 100 volts
1887
Volta's condensing electroscope
1897-1910