Hand book of calculations for engineers and firemen : Relating to the steam engine, the steam boiler, pumps, shafting, etc. . 0 feet of oxygen gas. Wax Paraffin oil ..... Coal-gas Carbonized gas Table of the Cost of Equal Light feom Diffeeent ft. of gas costing 2 cts. =1 lb. of dip candles costing 2| =1 of composite candles *< 2| =1 of wax candles u 41c. 175 18 =1 gallon of paraffin 100. Hand Book of Calculations. 211 ILLUMINATING GAS. Table of Heat produced by different Lights of equal Power. Tallow candles 505 lbs. of water warmed 10° Wax 383 • Pa
Hand book of calculations for engineers and firemen : Relating to the steam engine, the steam boiler, pumps, shafting, etc. . 0 feet of oxygen gas. Wax Paraffin oil ..... Coal-gas Carbonized gas Table of the Cost of Equal Light feom Diffeeent ft. of gas costing 2 cts. =1 lb. of dip candles costing 2| =1 of composite candles *< 2| =1 of wax candles u 41c. 175 18 =1 gallon of paraffin 100. Hand Book of Calculations. 211 ILLUMINATING GAS. Table of Heat produced by different Lights of equal Power. Tallow candles 505 lbs. of water warmed 10° Wax 383 • Paraffin oil 3«1 Coal gas 278 Carbonized gas 195 The Gas Meter. The unit of quantity, for gas, is the cubic foot, and the machinefor accomplishing the measurement is called the Gas Meter, ofwhich there are two kinds, the wet meter, and the dry both are measures of volume, there is no difference betweenthem, so far as economy is concerned, any more than when themeasurements of liquids are effected by a copper or tin vessel. The Index of the Gas 130 is a drawing of the ordinary index used for meters. Fig. 130. supplying up to 10 lights. When a larger capacity than thesethe index is provided with 4 and sometimes 5 dials. Thehand on each index as shown in the figure moves round in samedirection as the figures count; thus from 1 to 2 to 3, etc. Thehand on the index (beginning at the left) moves to the right,that of the second turns to the left, that of the third turns tothe right. In a new meter all the hands point to the cypher(0) at the top, which shows that no gas has been used. When 2J2 Hand Book of Calculations. HOW TO ftEAD A GAS METEE. the hand on the right index has moved to 1 it implies that 100feet of gas have been used; when it reaches 6 it means 600 feet;and on completing the circuit at the top (0) it is 1000 feet:each time this hand passes round 1000 feet of gas have beenused. Each of the other indexes are tenfold multipliers of eachother. Single
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