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Colza oil, derived from Brassica campestris, and a similar oil derived from rapeseed, yielded candles that produce clear, smokeless flames. The French chemists Michel Eugène Chevreul (1786–1889) and Joseph-Louis Gay-Lussac (1778–1850) patented stearin in 1825. Like tallow, this was derived from animals, but had no glycerine content.
The type of glass to use next to the hot flame was a problem eventually solved. All available types of oil to use were tested, and methods to purify them for use were the subject of a number of experiments. Whale oil was eventually settled on, which eventually created an important new industry. The mechanism for holding the wick and moving it ...
The Argand lamp is a type of oil lamp invented in 1780 by Aimé Argand. Its output is 6 to 10 candelas, brighter than that of earlier lamps. Its more complete combustion of the candle wick and oil than in other lamps required much less frequent trimming of the wick.
Citronella candles (which burn wax mixed with citronella oil) are not effective at repelling mosquitos such as Aedes aegypti, the species of mosquito responsible for spreading dengue fever, chikungunya, Zika fever, Mayaro and yellow fever viruses, and other disease agents. [16] [17] [18]
(The NCA’s members include some of the most popular conventional candle companies and one of the largest oil companies in the world. The association is also headed by people employed at top ...
Amateur use of mineral oil follows industrial use, since it typically is the insulating and cooling fluid in large electrical transformers and similar equipment, such as small switches used for high-voltages. Mineral oil is used as a brake fluid in some cars, such as Citroën models with hydrodynamic suspension, and bicycle disc brakes.
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