A tube for producing Lenard rays.

plural of Plücker tube

plural of Hittorf tube

(historical) An early form of vacuum tube.

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. / A Crookes tube.

An improvement on the Crookes tube in which the electrons are produced by thermionic effect from a tungsten filament heated by an electric current.

plural of Coolidge tube

a type of butyrometer (used to estimate the proportion of butterfat in milk)

Alternative form of knob-and-tube

Of or pertaining to a type of electrical wiring consisting of insulated conductive copper wire affixed by porcelain hardware and protected in vulnerable areas by insulated cloth sleeving. Widely used in North America during the late 19th and early 20th centuries.