'Drummond light' definitions:
Definition of 'Drummond light'
From: GCIDE
- 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]
Definition of 'Drummond light'
From: GCIDE
- 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 light}. [1913 Webster +PJC]