Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 84
also turn the lights up ordown, and regulate the illuminationmuch more perfectly than is possiblewhen mantles are used. We can readilyutilize switches for controlling thelights from a distance. The device Illumination Data. A few weeks ago some j)hotographswere taken at the authors houseentirely by… … Fig. .).—Ilhistrutins tlie n.^f of iuet\ Iciu Hiires for siicctncnlnr cUcci. i iii> lioii.cwas illiiniinated nt night (iino liy three such liMrcs, each ])lace(l at a distanceof about 40 feet. The photograph was taken entirely by the acetylene light. eni])l()ycd is a i>rcss ])utton…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
