A study of direct and indirect illumination (1912)
Simons, Alexander McDougall · leaf 14
3 E UNIVERSITY OF ILLINOISDEPARTW£NTOF MATHEMATICS NAME … Fig, 2. Distribution of light in a vertical plane around a200 candle power (250 watt) series tungsten lamp.
Lighting · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
