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Lighting |
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Arc lamp, carbon flame "Diagram of inclined carbon-flame arc lamp." —Croft 1917... |
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Automatic Buoy "Courtney's Automatic Buoy. A, cylinder, 27 ft. 6 in. long; B, mooring shackle; C, rudder; D, buoy; E, diaphragm; F, ball valves; G, air inlet tubes; H, air (compressed) outlet tube to whistle; I, co... |
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Beacon "Beacons in exposed situations are constructed sometimes of stone, and cement-concrete or cement-rubble, but generally of castiron columns let into heavy base plates which are fixed to the rock by str... |
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Burner An appendage to a lamp or gas-fixture designed to promote combustion.... |
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Candelabra A bronze German candelabra.... |
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Candle A cylinder of tallow, wax, spermaceti, paraffine, or other combustible substance, inclosing a wick, and used to furnish light.... |
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Candle A wax candle, lit..... |
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Candle A candle is a light source consisting of a solid block of wax and a wick. Pictured is a hand lighting the candle with a match.... |
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Carbon Lamp "Edison's paper carbon lamp."—E. Benjamin Andrews 1895... |
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Catadiopteric Light "Catadioptric Fixed Light.—This apparatus, in which a central burner is used, consists of a dioptric cylindric refractor with zones of silvered mirror above and below similar in profile to Bordi... |
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Catadiopteric Light "Catadioptric Fixed Light.—This apparatus, in which a central burner is used, consists of a dioptric cylindric refractor with zones of silvered mirror above and below similar in profile to Bordi... |
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Catadioptric Holophote "Catadioptric Holophote.—Part of the anterior hemisphere of rays is intercepted and at once parallelized by the lens L, whose principal focus (i.e., for parallel rays) is in the center of the fl... |
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Catadioptric Holophote "Catadioptric Holophote.—Part of the anterior hemisphere of rays is intercepted and at once parallelized by the lens L, whose principal focus (i.e., for parallel rays) is in the center of the fl... |
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Chandelier A frame with branches to hold a number of lights for the purpose of illumination.... |
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Coal-gas "Coal-gas was first used as a lighthouse illuminant at Salvore, near Trieste, in 1817. For many years it has been used in the harbour lights of Great Britain when in the neighborhood of gas-works. M... |
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Coal-gas "Coal-gas was first used as a lighthouse illuminant at Salvore, near Trieste, in 1817. For many years it has been used in the harbour lights of Great Britain when in the neighborhood of gas-works. M... |
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Condensing Apparatus "Condensing Apparatus for Steamer's Side Lights.—By means of this application of the condensing principle all the light can be distributed with strict equality over 112 degrees, which is the arc... |
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Condensing Apparatus "Condensing Apparatus for Steamer's Side Lights.—By means of this application of the condensing principle all the light can be distributed with strict equality over 112 degrees, which is the arc... |
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Condensing Light "Fixed Conensing Light for a Single Sector, 1850.—The holophote Light pLp throws its whole light on straight condensing prisms c, each of which distributes the rays over the required sector." &m... |
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Condensing Octant "Condensing Octant.—The central fixed apparatus bb with spherical mirror dd throws its rays directly over the angle of 45 degrees pgp, while the supplemental rays fall upon the straight condensi... |
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Condensing Octant "Condensing Octant.—The central fixed apparatus bb with spherical mirror dd throws its rays directly over the angle of 45 degrees pgp, while the supplemental rays fall upon the straight condensi... |
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Condensing Quadrant "Condensing Quadrant.—The fixed apparatus bbb, with spherical mirror behind, throws its rays directly through the angle of 90 degrees afa', while the supplementary rays falling on the straight c... |
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Cresset A cup of incombustible material mounted upon a pole or suspended from above, and serving to contain a light often made by burning a coil soaked in oil. ... |
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Differential Lens "Differential Lens.—Horizontal divergence may be obtained to any required amount by varying the radius of curvature of the inner face of an annular lens. The outer face is the same as that of a... |
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Differential Lens "Differential Lens.—Horizontal divergence may be obtained to any required amount by varying the radius of curvature of the inner face of an annular lens. The outer face is the same as that of a... |
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