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Switch-lan′tern.

A lantern on the lever of a railway-switch, to indicate the condition of the switch either by its position or by the display of a colored light.

In the example, the lantern has glasses of different colors set in tubes, so that only the one turned directly in front is visible. The lantern is rotated by the reciprocatory motion of the switch-bar so as to indicate which of several divergent tracks is open.

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