Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 354
ig. 9. Candle-power Polar Curves ofMetal Filament Lamp Fittings. a=75 c.p.lamp (isolated). h=75 c.p. lamp containedin street fittings, with reflector and shade.c=100 c.p. lamp (isolated). rf=lfX)c.p. lampcontained in street fittings, with reflectorand shade. These are used in side streets… … Central Sispe These details of actual practice may be of some use, although there are otherfactors of a local character always to be taken into account:— For instance, Cannon Street and Cheapside—two parallel roads in the City ofLondon—are each lighted with centraUy hung flame arc lamps. Both…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
