Light, photometry and illumination : a thoroughly rev. ed. of ''Electrical illuminating engineering'' (1912)
Barrows, William Edward, 1878-1960 · New York ; London : McGraw-Hill Book Co. · leaf 73
from the Trans, of the Ilium. Eng. Soc, Vol. 5, p. 753, 1910. 58 LIGHT, PHOTOMETRY AND ILLUMINATION are decided advantages. Moreover, the candle-power of aparticular pentane lamp is more accurately reproducible thanthat of the Hefner, when both are operated under proper condi-tions, but there is a… … . Sectional Plau &rt- Saturator Box T ^ 3 Centering\ Screws spaced ^^ I 1 Tin Cap to ProteA^ ^^. I 1 Burner from J;uat Heated Air Supply for Inner Flam*
Light · Photometry · Electric lighting
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
