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c, box, a box or case containing apparatus moved by clockwork so as to play certain tunes automatically. -- Musical fish (Zoöl.), any fish which utters sounds under water, as the drumfish, grunt, gizzard shad, etc. -- Musical glasses, glass goblets or bowls so tuned and arranged that when struck, or rubbed, they prod…

An instrument carried by a pedestrian for automatically making a topographical record of the ground covered during a journey.

e, etc., for connecting a large pipe with a smaller one. -- Reducing valve, a device for automatically maintaining a diminished pressure of steam, air, gas, etc., in a pipe, or other receiver, which is fed from a boiler or pipe in which the pressure is higher than is desired in the receiver.

A machine for registering automatically the number of persons passing through a gateway, fares taken, etc.; a telltale.

In a variable expansion central-valve engine, a small auxiliary engine for automatically adjusting the steam distribution to the load on the main engine. [Webster 1913 Suppl.]

A photograph printed by a process in which a strip or roll of sensitized paper is automatically fed over the negative so that a series of prints are made, and are then developed, fixed, cut apart, and washed at a very rapid rate.

fervescence. -- Safety valve, a valve which is held shut by a spring or weight and opens automatically to permit the escape of steam, or confined gas, water, etc., from a boiler, or other vessel, when the pressure becomes too great for safety; also, sometimes, a similar valve opening inward to admit air to a vessel in…

A device for automatically counting the revolutions or pulsations of an engine or other machine; -- called also simply counter.

A record of fluctuations of temperature made automatically at a distant station.

An instrument for automatically recording indications of the variation of temperature.

through which water may flow freely when the tide sets in one direction, but which closes automatically and prevents the water from flowing in the other direction. (b) (Naut.) A place where the tide runs with great velocity, as through a gate. -- Tide gauge, a gauge for showing the height of the tide; especially, a co…