Liquid Oxygen.
Oxygen stands alone among the gases-in being slightly magnetic. An experiment has been made by Professor Dswar, of Cambridge, which very strikingly illustrates this property. Mr Dewar, by following up Pictet’s modus operandi, has succeeded in reducing this gas to a liquid condition. Under a temperature of 180 degrees Centigrade below zero, be poured the liquid oxygen into a shallow saucer of rock crystal, a mineral which it does not mdsten or to wbi.-h it does not adhere, and consequently main tains in connection with that substance a perfect ‘ pheroidal condition* lit was natmally expected, considering the magnetic inclinations of the gas, that under magnetic stress there would be a total or partial arrest of the violent agitation caused by the ebullition of the mass of liquid oxygon. Something much more marked, however, happened ; for on being brought into relation with a powerful electro magnet, the entire spheroid was literally lifted through the air, and remained adherent to the pules until dissipated by the heat of the metal. Iron and other m tals less their magnetism when red hot. But this increase of power in a feebly magnetic gas when concentre,ted by cold is not paralleled by the behaviour of any other magnetic metal in solution.
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Bibliographic details
South Canterbury Times, Issue 6752, 5 February 1892, Page 3
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208Liquid Oxygen. South Canterbury Times, Issue 6752, 5 February 1892, Page 3
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