\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}.
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.