Journal of electricity, power, and gas . r, as prac-tically all business houses are provided with meterseither for actual use in connection with some appli-ance or for emergency purposes. The Comparative Income. It is safe to assume that a gas range will notconsume more than 18,000 cu. ft. per annum, maxi-mum. Consuming 12 ft. of gas per hr. and burning anaverage of 3 hr. per night for 310 nights, the 3 mantlelamp would consume 11,160 cu. ft. per annum. Iestimate that the average installation would cover atleast two lamps, and in this case the yearly consump-iton would be 22,320 cu. ft. of gas
Journal of electricity, power, and gas . r, as prac-tically all business houses are provided with meterseither for actual use in connection with some appli-ance or for emergency purposes. The Comparative Income. It is safe to assume that a gas range will notconsume more than 18,000 cu. ft. per annum, maxi-mum. Consuming 12 ft. of gas per hr. and burning anaverage of 3 hr. per night for 310 nights, the 3 mantlelamp would consume 11,160 cu. ft. per annum. Iestimate that the average installation would cover atleast two lamps, and in this case the yearly consump-iton would be 22,320 cu. ft. of gas. It must be ad-mitted that these conservative though almost incred-ible figures are convincingly in favor of gas lighting. Maintenance. The experience of the average gas company isthat all trouble trips and minor repairs on gas rangesare done free of charge as a matter of service. Lamps are cleaned and inspected at least every tendays. A man at $2 per day will take care of an aver-age of fifty lamps, and the average cost per inspection. Two-Mantle Inverted Gas Single Large Mantle In- Lamp for Use in Low Ceil- verted Gas Lamp, Giving ing or Small Area Business 225 and maintenance will be 4 cents each, including laborand material. Most companies charge a rental or maintenance of50 cents per lamp per month, but a minimum chargeof 25 cents per month should pay all expense of main-tenance. In fact, we may estimate the whole coston the following basis: Cost of Lamp Maintenance. Yearly cost of labor per lamp ? fl-44 Average of one mantle per month per lamp (12 mantles at 10 cents) 1.^0 Broken glassware and extras (about) 36 Total *3-00 Street Mains. It is a fact that large expenditures for main ex-tensions are absolutely necessary to meet require-ments in outlying sections, and this means a heavyexpense and drain on the resources of the utility com-pany. June 6, 1914.] JOURNAL OF ELECTRICITY, POWER AND GAS 501 Gas arc lamps sell gas in the down town businesssections wh
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