Bible Dictionaries
Plucker Tube
Webster's Dictionary
(1):
A vacuum tube, used in spectrum analysis, in which the part through which the discharge takes place is a capillary tube, thus producing intense incandescence of the contained gases.
(2):
Crookes tube.
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Bibliography Information
Webster, Noah. Entry for 'Plucker Tube'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/p/plucker-tube.html. 1828.