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Light and lighting (1908)
Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 352
Fig. 1. Cheapside lighted by centrallysuspended Oliver Oriflamme magazine flamearcs, fitted with Peard prismatic reflector(12^ amp., 3,000 c.p.). Height above road-way 27 ft. 6 in., average distance apart 90 ft.General width of roadway 50 ft. Alternatelamps extinguished at midnight. Fig. 3. Queen…Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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