Transactions of the Illuminating Engineering Society Volume 17 - Tapa blanda

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...and pulsation extended to the lights the right main was identified. At the last convention of the American Gas Association data was presented7 showing that approximately 20 per cent of the gas sold by companies in this country is used for lighting purposes. Manufacture.--A manufactured gas has been reported8 in England which with a calorific value of 350 B. t. u. is claimed to give the ordinary consumer the same value as he can get from a 500 B. t. u. straight coal gas. It is used in burners without Bunsen tubes and is supposed to obtain aeration for combustion purposes from the air surrounding the flame. The consumer turns the gas on full by means of the tap at the burner and regulates it until he gets the maximum light with the minimum consumption of gas. No lighting back or breakage of mantles occurs. The gas can also be turned down when required without lighting back. Cos Jour., Apr. 5, 1922, p. 50. 7 Gas Jour., Dec. 21, 1921, p. 820. Cat Jour., Oct. 5, 1921, p. 29. Additional information is available on the production of gas from straw referred to in the 1918 Progress Report. A test on a machine handling 150 pounds of baled straw gave 850 cubic feet of gas for this amount in thirty-three minutes. Sunflowers will produce 15,000 cubic feet per ton, 10 gallons of light oil, 10 gallons of tar and 640 pounds of carbon. An analysis of straw gas has shown C02--30.6 per cent, acetylene--6.4 per cent, CO--28.2 per cent, methane--21.3 per cent, H--11.3 per cent, N--3.2 per cent yielding a calorific value of 469 B. t. u. per cubic foot. In 1918 the last year for which figures are available10 the production of monazite sand in India amounted to 2,117 tons a great advance over the last pre-war year's production of 1,235 tons. The outlook is very favorable and it is...