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The lantern is the large round glass structure, that houses the lens, located at the top of the lighthouse. This structure is made out of multiple materials, primarily glass, wood, and iron. Any conservation or restoration processes should keep in mind that the lantern, ventilation shafts, and lens should not be obstructed in any way.
The lantern room is the glassed-in housing at the top of a lighthouse tower containing the lamp and lens. Its glass storm panes are supported by metal muntins (glazing bars) running vertically or diagonally. At the top of the lantern room is a stormproof ventilator designed to remove the smoke of the lamps and the heat that builds in the glass ...
Originally, Sneath Glass made kerosene lantern globes and the founts that held the lantern's fuel. Ruby, green, and blue globes were a specialty. [26] At one time, Sneath Glass was one of only three factories in the United States that made copper ruby globes. Major customers of lantern globes were railroads and ships. [1]
The lantern contained a fourth order Fresnel lens, and had a 270 degree illumination angle. The lighthouse served as a sector light, marking a safe approach through the harbour channel, and was fitted with ruby and green glass screens either side of a white beam directed down the channel. The light was first lit on 17 February 1866. [3]
Gas mantles were also used in portable camping lanterns, pressure lanterns and some oil lamps. [ 1 ] Gas mantles are usually sold as a fabric bag which, because of impregnation with metal nitrates, burns away to leave a rigid but fragile mesh of metal oxides when heated during initial use; these metal oxides produce light from the heat of the ...
The glass globes were placed on posts ten feet high and spaced fifty feet apart along the street, following the system used in London. These early street lights were "more suggestive than real"; in practice, pedestrians moved from one pool of light to another, walking through shadow in between. [1]
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