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Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 351
94 69 4.44 394 v<fs 95 73 4.26 310 !i2 96 . 78 4.09 247 44 97 83 3.93 195 51 98 88 3.78 153 65 99 94 3.64 126 79 100 100 3.5 100 X) 101 106 3.38 84 JL18 102 •111 3.27 68 146 103 116 3.16 58 173 104 123 3.05 47 211 105 129 2.95 39 253 106 137 2.85 31 316 107 143 2.76 26 380 108 152 2.68 21 474… … Lamps of 4 watts per candle-power should be installed whenthe regulation is poor. These values are for 110-volt lamps. A220-volt lamp should have a lower efficiency to give a lono- life.Architecture · Building · Carpentry
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