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crookes tube
c r o o k e s t u b e hex:#99;#114;#111;#111;#107;#101;#115;#32;#116;#117;#98;#101;
The Salt of the World?
- Crookes tube - - A vacuum tube in which the exhaustion is carried to a very high degree, with the production of a distinct class of effects; -- so called from W. Crookes who introduced it.