Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . r 10 cents is a kilowatt-hour, the equivalent horse-power is for the same length of time. At the assumed rate, 10cents buys horsepower for one hour. When used as work 320 MECHANICS OF THE HOUSEHOLD it represents 2,544,000 foot-pounds or 255,400 foot-pounds ofwork for 1 cent. This work when expended in a motor, todo the family washing or perform any other household drudgery,represents the greatest value to be derived from its use. A 3^^-horsepower motor is amply large to operate
Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . r 10 cents is a kilowatt-hour, the equivalent horse-power is for the same length of time. At the assumed rate, 10cents buys horsepower for one hour. When used as work 320 MECHANICS OF THE HOUSEHOLD it represents 2,544,000 foot-pounds or 255,400 foot-pounds ofwork for 1 cent. This work when expended in a motor, todo the family washing or perform any other household drudgery,represents the greatest value to be derived from its use. A 3^^-horsepower motor is amply large to operate a family washingmachine. Even though the motor is only 50 per cent, efficientits cost of operation is less than 7 cents per hour. Miniature Lamps.—Miniature electric lamps include all thatare not used for general illuminating purposes. The term appliesmore particularly to the form of the base than to the voltageor candlepower of the filament. There are three general classesof these lamps: candelabra and decorative, that operate on light-ing circuits of 100 to 130 volts and are usually intended for deco- d.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkmcgrawhillb
