Hittorf tube
Hittorf tube Hit"torf tube (Elec.) (a) A highly exhausted glass tube with metallic electrodes nearly in contact so as to exhibit the insulating effects of a vacuum. It was used by the German physicist W. Hittorf (b. 1824). (b) A Crookes tube. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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