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An acoustical galvanometer for the measurement of small alternating currents

✍ Scribed by G.F.S.


Publisher
Elsevier Science
Year
1922
Tongue
English
Weight
109 KB
Volume
193
Category
Article
ISSN
0016-0032

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A statistical theory is given of the connection of the graininess of the photographic negative and the flu ctuations of the density measured with an arrangement containing a galvanometer. This theory is applie d to the microphotometer and the graininess-m eter.