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Cited by Order-book of the Cambridge Scientific Instrument Company (1880-1884)
Description:'1880... April... 12. Professor Lord Rayleigh
1 Astatic Galvanometer. 2000 Ohms & compensating magnet.'
'1880... Aug. 30. Professor Lord Rayleigh
Cavendish Laboratory Cambridge.
1 astatic galvanometer with 1 pair of Coils lower magnet to have damping fly. 2000 Ohms in all.'
note: 'delvd' (f. 12)