The lighting of armories and gymnasiums / information compiled by A.L. Powell and A.B. Oday. (1920)
General Electric Company, Edison Lamp Works · General Electric Co., Edison Lamp Works · leaf 10
of the tunnel. This arrangement pre-vents the unnatural condition of a very bright object being sur-rounded by a totally dark area. At some of the short range galleries, the targets are controlledfrom the shooting position by means of a continuous wire and handwheel. Above each target position is… … Fig. 7 Photograph Taken from the 50-yard Point of a Rifle Range, Targets of which areIlluminated by 25-watt Mazda Lamps in a Mirrored Trough Reflector withSimilar Equipment at Points Along the Tunnel as Describedin the Text One of the rifle ranges investigated was 120 yards in length andconsisted…
Lighting · Light bulbs · Light fixtures
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