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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.
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.
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.
Seal oil lamps. The Inuit oil lamps were made mainly of soapstone, but there are also some made of a special kind of pottery. [12] Sizes and shapes of lamps could be different, but most were either elliptical or half-moon shaped. [13] The taqquti or wick trimmers, also known as lamp feeders, were made of wood, willow, soapstone, bone or ivory. [14]
Cannabis sativa is an annual herbaceous flowering plant. ... Cannabis sativa seeds are chiefly used to make hempseed oil which can be used for cooking, lamps ...
Also within the bulb were metal sculptures coated with phosphors. These phosphors fluoresced when excited by glow discharge. Because glow discharge occurs readily at 110-120 volts AC, one could use these bulbs in standard household lamps in the United States. The phosphors used in the bulbs were somewhat brittle, necessitating care in handling.
For about 17 years now, Crop King Seeds has been churning out high-quality marijuana seeds, and this longevity has made it one of North America’s best online cannabis seed banks. Highlights
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. This is a list of cannabis seed companies. Some of these supply only hempseed, that is, cultivars that produce low levels of THC (allowable levels are determined by local regulation). BSF Seeds Coopérative Centrale Des Producteurs De Semences De Chanvre, France, is the main supplier of ...