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2 definitions found
 for Drummond light
From The Collaborative International Dictionary of English v.0.48 :

  Drummond light \Drum"mond light`\ [From Thomas Drummond, a
     British naval officer.]
     A very intense light, produced by turning two streams of gas,
     one oxygen and the other hydrogen, or coal gas, in a state of
     ignition, upon a ball of lime; or a stream of oxygen gas
     through a flame of alcohol upon a ball or disk of lime; --
     called also oxycalcium light, or lime light.
     [1913 Webster]
     Note: The name is also applied sometimes to a heliostat,
           invented by Drummond, for rendering visible a distant
           point, as in geodetic surveying, by reflecting upon it
           a beam of light from the sun.
           [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Calcium \Cal"ci*um\ (k[a^]l"s[i^]*[u^]m), n. [NL., from L. calx,
     calcis, lime; cf F. calcium. See Calx.] (Chem.)
     An elementary substance; a metal which combined with oxygen
     forms lime. It is of a pale yellow color, tenacious, and
     malleable. It is a member of the alkaline earth group of
     elements. Atomic weight 40. Symbol Ca.
     [1913 Webster]
     Note: Calcium is widely and abundantly disseminated, as in
           its compounds calcium carbonate or limestone, calcium
           sulphate or gypsum, calcium fluoride or fluor spar,
           calcium phosphate or apatite.
           [1913 Webster]
     Calcium light, an intense light produced by the
        incandescence of a stick or ball of lime in the flame of a
        combination of oxygen and hydrogen gases, or of oxygen and
        coal gas; -- called also Drummond light and lime
        [1913 Webster +PJC]

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