Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 412
re is taken 341 60 ELECTRIC LIGHTING in the preparation of the wick and spermaceti. This candle burnswith a normal height of flame of 45 millimeters and consumes120 grains per hour when burning in dry air at normal atmos-pheric pressure. Under these conditions, the light given by asingle candle is… … Fig. 51. and when the flame height reaches 45 millimeters, readincrs canbe taken. The candle should not require trimming when theproper height of flame has been reached. It is best to weigh theamount of material consumed by balancing the candle on a proper-ly arranged balance when the first reading…
Architecture · Building · Carpentry
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