Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 463
LigSf IrcreoI.I 10 M 08 07 Ofe t t l Kosda lomp6 … AT IJST—SALES OF INCANDESCENT LAMPS FOB EIGHT-YEAR PERIOD 1907-1914 ABOVE—INCREASING LIGHT PRODUCTION AND DIMINISHING PRICES OF TUNGSTEN LAMPS Fig. 2. Carbon- 0ized Paper BambooCellulose-:Carbon-(Pj-esent)
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
