Soviet Crookes vacuum electron tube for cathode rays demonstrating USSR

Vacuum electron tube for demonstrating the straightness of cathode ray propagation in school physics classes.

The tube can be used to demonstrate:
a) The deflection of cathode rays under the action of a magnetic field.
b) Fluorescence of glass under the action of cathode rays.

Production of the USSR, Leningrad Electrodelo Plant, 1959.

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