Argand lamp

A disadvantage of the original Argand arrangement was that the oil reservoir needed to be above the level of the burner because the heavy, sticky vegetable oil would not rise far up the wick.The same principle was also used for cooking and boiling water due to its 'affording much the strongest heat without smoke'.[3] The Argand lamp was introduced to Thomas Jefferson in Paris in 1784 and according to him gave off "a light equal to six or eight candles.Argand lamps were manufactured in a great variety of decorative forms and quickly became popular in America.Kerosene was cheaper than vegetable oil, it produced a whiter flame, and as a liquid of low viscosity it could easily travel up a wick eliminating the need for complicated mechanisms to feed the fuel to the burner.
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 .
An astral lamp, an Argand lamp designed so that the reservoir does not cast a separate shadow
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