Drüm'mond-light, n.

(-lit), n. [From Captain Drummond.] A very intense light, produced by turning two streams of gas, one oxygen and the other hydrogen, in a state of ignition, upon a ball of lime; or a stream of oxygen gas through a flame of alcohol upon the ball or disk of lime;—called also oxycalcium light, or lime light.

☞ The name is also applied sometimes to the heliostat, invented by Captain Drummond, for rendering visible a distant point, as in geodetic surveying, by reflecting from it a beam of light from the sun.