Engine-room Telegraph

A circular instrument placed on the bridge and elsewhere about the decks of steamships, and worked by a short lever connecting with the engine-room, and by the manipulation of which lever the deck officer transmits signals to the engineer. The upper half-circle of the instrument has printed on it the words half speed ahead, stop, full speed astern, etc., and by moving the lever to one of these the corresponding word or words is pointed to by an indicator on the engine-room dial.