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The Carcel is a former French unit for measuring the intensity of light.The unit was defined in 1860 as the intensity of a Carcel lamp with standard burner and chimney dimensions, which burnt colza oil [1] (obtained from the seed of the plant Brassica campestris) at a rate of 42 grams of colza oil per hour with a flame 40 millimeters in height.
A kerosene lamp (also known as a paraffin lamp in some countries) is a type of lighting device that uses kerosene as a fuel. Kerosene lamps have a wick or mantle as light source, protected by a glass chimney or globe; lamps may be used on a table, or hand-held lanterns may be used for portable lighting.
An Argand lamp in use in A Portrait of James Peale, done in 1822 by Charles Willson Peale Argand lamp with circular wick and glass chimney. Illustration from Les Merveilles de la science (1867–1869) by Louis Figuier. The Argand lamp is a type of oil lamp invented in 1780 by Aimé Argand.
An oil lamp is a lamp used to produce light continuously for a period of time using an oil-based fuel source. The use of oil lamps began thousands of years ago and continues to this day, although their use is less common in modern times.
The upper portion of the lamp uses a chimney like in Mueseler and Morgan lamps. The rising gases pass up the chimney and through a gauze. At the top of the chimney a dished reflector diverts the gases out sideways through a number of holes in the chimney. The gases then start to rise up the intermediate chimney before exiting through another ...
A moderator lamp provides a pressurized supply of oil to the lamp wick by use of a spiral spring-loaded piston operating on a cylindrical oil reservoir. A regulating mechanism, the "moderator", compensates for the varying force of the spring as the piston descends. The moderator is a wire that runs through a tube in the center of the piston.