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Lord Kelvin's Patent Electric Balance

Lord Kelvin's Patent Electric Balance number 646. This form of the Thompson standard electric balance dates from 1887. The number on this instrument 646 indicates a date of 1898/9. 18" (46 cm) x 7" (17.8 cm) height 6.5" (16.5 cm) See also Lord Kelvin's Patent Electric Balance heavy current model on this site.

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Lord Kelvin's Electric Balance 1
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Lord Kelvin's Electric Balance 2
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Lord Kelvin's Electric Balance 3
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Lord Kelvin's Electric Balance with heavy current model to rear
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