Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . Fig. 177^.—Gas-meter dial. It reads 38600 cubic feet. Take the figure 3 on the 100 thousand circle, the figure 8 onthe 10 thousand, and the figure 6 on the 1 thousand, and you have 256 MECHANICS OF THE HOUSEHOLD 30,000, 8000, and 600, or 38,600 feet. To ascertain the quantityof gas used in the time elapsing between the readings of the meter,subtract the quantity registered at the previous reading. Thus,if the previous reading was 38,600 feet, and the next reading40,100 feet, the po
Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . Fig. 177^.—Gas-meter dial. It reads 38600 cubic feet. Take the figure 3 on the 100 thousand circle, the figure 8 onthe 10 thousand, and the figure 6 on the 1 thousand, and you have 256 MECHANICS OF THE HOUSEHOLD 30,000, 8000, and 600, or 38,600 feet. To ascertain the quantityof gas used in the time elapsing between the readings of the meter,subtract the quantity registered at the previous reading. Thus,if the previous reading was 38,600 feet, and the next reading40,100 feet, the pointers standing thus:. Fig. \77B.—Gas-meter dial. It reads 40100 cubic feet. You have 40,100 Subtract your last reading 38,600 and you find that your bill should be for 1,500 feet When 100,000 feet have been passed, the index is at zero; thatis, all the pointers stand at 0, and the registration begins all overagain. Prepayment Meters.—In many places it is desirable to sellgas in small quantities and to prepay the amount for a given supply of gas. This is accomplished bya meter such as that of Fig. 179. Themeter is constructed much the same as theformer but provided with a mechanismsuch that when a coin—usually 25 cents—is deposited, according to the printeddirections in the instrument, an amountof gas representing the proportional cur-rent rate is allowed to pass the supply is cut off as soon as theamount paid for is used; when in orderto receive more gas, another coin must bedeposited as Rules.—The rules for the regulation of gas serv-ice are in many States under the
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkmcgrawhillb
