Definition of Drummond light. Meaning of Drummond light. Synonyms of Drummond light
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Definition of Drummond light
Drummond light 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.
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.
Drummond light 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.
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.
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.
