Modern lighting : examples of its successful application in the industries. (1920)
National Lamp Works of General Electric Co. Engineering Department. · National Lamp Works of General Electric Co. Engineering Department · leaf 18
r Data—Plate Seven TJie Old Type of Unit Some cone shades Lamp Carbon, Gem, Mazda B Mounting Height Irregular, drop cords Spacing DistanceIrregular Average Illl^mination 0.2 foot-candles. … PLATE EICITT ^
Electric lighting · Interior lighting fixtures, lamps, and ballasts
Internet Archive · Building Technology Heritage Library · Public Domain Mark 1.0. Free to use for anything.
