A text-book on chemistry : for the use of schools and colleges . 174 COMBUSTION IN OXYGEN. LECTURE XXIX. Oxygen continued.—Dru?nmond,s Light.—Comhustion ofPhosphorus.—Double Change arising in Combustion.—The Laroisicrian Doctrine. — Basic, Indifferent, andAcid Oxides.—Physiological Relations of Oxygen.—Supporters of Combustion.—Nature of Flame.— Con-stancy of Heat evolved.— Vegetable Origin of Oxygenin the Air. If a piece of lime the size of a peppercorn be placedin the flame of a spirit lamp, through which oxygen gasis directed by a blowpipe, the lime phosphoresces pow-erfully, emitting a lig
A text-book on chemistry : for the use of schools and colleges . 174 COMBUSTION IN OXYGEN. LECTURE XXIX. Oxygen continued.—Dru?nmond,s Light.—Comhustion ofPhosphorus.—Double Change arising in Combustion.—The Laroisicrian Doctrine. — Basic, Indifferent, andAcid Oxides.—Physiological Relations of Oxygen.—Supporters of Combustion.—Nature of Flame.— Con-stancy of Heat evolved.— Vegetable Origin of Oxygenin the Air. If a piece of lime the size of a peppercorn be placedin the flame of a spirit lamp, through which oxygen gasis directed by a blowpipe, the lime phosphoresces pow-erfully, emitting a light so bright that the eye can scarcelybear it. This is the original form of what is called Drum-monds light. The light, however, is still brighter whenthe oxyhydrogen blowpipe is employed. Fie 157 ^ne combustion of phosphorus in oxy- gen gas constitutes one of the most brill-iant experiments. A piece of lighted phos-phorus immersed in an atmosphere of thisgas, burns with the evolution of a prodig-ious amount of light and heat, Fig.
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