Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 241
Fig. 25.—The Metro burner. … no adjusters, they are simply slippedinto a socket and held in position by bayonet points, somewhat after themanner of the electric lamp. Sucha burner had the advantage that itwas easy to clean, which in London orlarge cities, Avhere there is so muchdust in the air, is very necessary. At the…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
