LAMPS are held in holders designed either to be suspended on the end of flexible conductors or to be screwed to bho ceiling or a rigid fitting. A holder consists of a brass casing in two parts, held together by a screwed collar and an internal porcelain base. The base includes two projecting spring terminals, … Read more


THE Board of Trade electrical unit is the kilowatt-hour, which signifies a consumption of energy at the rate of 1,000 watts in an hour, or at a smaller rate for a corresponding longer time. The companys meter registers the units as they are consumed, and the householder pays accordingly. A 40-watt lamp will run = … Read more