Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 398
it is permissible to use largerlight units, such as arc lamps and high candle-power Nernst orincandescent units, while for factory lighting and drafting rooms,where the color of the light is not so essential, the Cooper Hewittlamp is being introduced. High candle-power reflector lamps,such as the… … < aco •<u PQ OO <2 O K C o H•< DSU & Sa cbe fa :i . .a K -■ S a ■a 10 o a a,o soo KO z
Architecture · Building · Carpentry
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