hide Matching Documents

The documents where this entity occurs most often are shown below. Click on a document to open it.

Document Max. Freq Min. Freq
Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
View all matching documents...

Your search returned 2 results in 1 document section:

trumpet has a parabolically shaped extension. Another has cylinders provided with interior clapper-valves near the heads; these admit air when the water recedes, but prevent its escape at the valveway when the water rises; the air has its exit through the whistles, and sounds the alarm. Another has two whistles and a single mouth-piece, the aim being to produce discordant sounds, which arrest attention. A very large fog-whistle, worked by a ten-horsepower engine, is placed on Thatcher's Island, off Salem, Mass. Fog—bell. A bell upon a vessel, buoy, or spit of land, and rung by the motion of the waves or force of the wind, as a warning to mariners. See Fogalarm. Foge. (Mining.) A forge for smelting tin. (Cornwall.) Fog—horn. See fog-alarm. Fog—trump′et. A horn or trumpet placed on a projecting headland, a vessel, or a spar, and blown by mechanical means or by the wind, as a warning to mariners. See fog-alarm. Fog—sig′nal. A detonati