Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 410
uch more attention is being paid to the design of the shades andto the quality of the glass used and the result of this study is theproduction of shades which, while they are ornamental, at the same 366 ELECTRIC LIGHTING 103 time are also very efficient. Fig. 73 shows one of many lines of… … Fig. 73. Typical Decorative Shades for Incandescent Lighting building, as in cove lighting, but totally indirect lighting fixturesare available and Fig. 75 shows one such unit. Semi-indirect fix-tures are, as a rule, rather less efficient than indirect as in the formercase the bowls must be of…
Electrical engineering
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