Illustrations of the theory and practice of ventilation : with remarks on warming, exclusive lighting, and the communication of sound (1844)
Reid, D. B. (David Boswell), 1805-1863 · London : Longman, Brown, Green, & Longmans · leaf 289
LIGHT. larger than is observed in gas emanating from a comparativelycold metallic tube. Where there is no objection to a brightlight, or to obscured glass, the present form of the plainest va-rieties of bude-lights include many advantages. The tempera-ture to which the gas is exposed, before… … h the chimney; e and /, two reflecting surfaces; the reflectingsurface e, diffuses the light of that portion of the flame which isbelow it, downwards; the reflecting surface /, diffuses all thelight of the part of the flame which is above it upwards. Thedotted lines shew the application of a ground…
