Definitions
from The Century Dictionary.
- noun A galvanometer with a mirror attached to the needle which reflects a beam of light intercepted by a scale of equal parts. The spot of light on the scale serves as an index.
Etymologies
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Examples
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It is to be regretted that so sound a reasoner and so careful an experimenter had not the great advantage of the assistance of such suitable instruments for this class of research as the mirror-galvanometer and the telephone.
Scientific American Supplement, No. 417, December 29, 1883 Various
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