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Carey Foster resistance bridge, made by Nalder

1895

Contact resistance bridge type A.C.6000 serial no.6838

Resistance bridge (a modified Carey Foster bridge) designed by Professor J. A. Fleming in 1879 for intercomparison of a number of standard ohm coils belonging to the British Association.

Resistance bridge designed by Professor J. A. Fleming in 1879

1880
Resistance bridge with coils arranged in decimal sets

Resistance bridge with coils

1892
Automatic precision resistance A.C. double bridge type A6 with six decade swiches, made by Automatic Systems Laboratories [ASL], Leighton Buzzard, Beds., c.1980.

Automatic precision resistance A.C. double bridge type A6 with six decade swiches

1980-1984