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The phlogiston theory, a superseded scientific theory, postulated the existence of a fire-like element dubbed phlogiston (/ flɒˈdʒɪstən, floʊ -, - ɒn /) [1][2] contained within combustible bodies and released during combustion. The name comes from the Ancient Greek φλογιστόν phlogistón (burning up), from φλόξ phlóx (flame).
In addition to wood, combustible dusts include metals, especially magnesium, titanium and aluminum, as well as other carbon-based dusts. [14] There are at least 140 known substances that produce combustible dust. [15]: 38 [16] While the particles in a combustible dusts may be of any size, normally they have a diameter of less than 420 μm.
Incendiary mixtures, such as the petroleum-based Greek fire, were launched by throwing machines or administered through a siphon. Sulfur- and oil-soaked materials were sometimes ignited and thrown at the enemy, or attached to spears, arrows or bolts, and fired by hand or machine.
A crossword(or crossword puzzle) is a word gameconsisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to separate ...
Fire. A burning candle. Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. [1][a] At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire.
The clues that excite me the most are the Alice Childress reference at 39-Across, the new angle on a very common crossword entry at 32-Across, and the shout-out to the city I live in at 54-Down ...
Division 4.1: Flammable Solid . Flammable solids are any of the following four types of materials: Desensitized Explosives: explosives that, when dry, are Explosives of Class 1 other than those of compatibility group A, which are wetted with sufficient water, alcohol, or plasticizer to suppress explosive properties; and are specifically authorized by name either in the 49CFR 172.101 Table or ...
Flammable placard. A flammable liquid is a liquid which can be easily ignited in air at ambient temperatures, i.e. it has a flash point at or below nominal threshold temperatures defined by a number of national and international standards organisations. The Occupational Safety and Health Administration (OSHA) of the United States Department of ...