Chetwynd liquid compass
1905-1912
Kelvin astatic mirror galvanometer
1901-1913
Lord Kelvin's paralleling voltmeter
Lord Kelvin's magnetic deflector
1901
Kelvin-White electrostatic voltmeter
1901-1907
Kelvin-White portable volt and amperemeter
1906
Kelvin astatic wattmeter
1901-1913
Steering Monitor, from Kelvin compass deflector
Testing set no.321 in wooden case
Part of Kelvin compass deflector, one of two
Electrodynamometer wattmeter no.217
Pattern no.182. liquid Boat's compass fitted with Captain Chetwynd's patent improvement
Kelvin portable electrometer No.91
Kelvin compass deflector by Kelvin and James White Ltd.
Kelvin and White generator
Multi-cell voltmeter
1900-1920