TABLE 64.— Yield of tar from coke-oven plants, 1921–1923 • Sum of averages for all plants divided by number of plants. Total tar recovered at all plants divided by number of tons of coal coked. AMMONIA TABLE 65.-Ammonia produced at coke-oven plants in the United States in 1923, in pounds TABLE 66.-Yield of ammonium sulphate equivalent reported by coke-oven plants, Total ammonium sulphate or equivalent recovered..pounds.. 657, 001, 003 At plant reporting minimum average yield.. do.... Average yield for all coal coked. Total number of plants reporting recovery of ammonia.. Number of plants recovering: Less than 10 pounds per ton of coal. 10-14.9 pounds.. 15-19.9 pounds.. 20-21.9 pounds. 22-23.9 pounds.. 24-25.9 pounds. 26-27.9 pounds.. 28-29.9 pounds.. 30 pounds or more.. • Sum of averages for all plants divided by number of plants. • Total yield in sulphate equivalent divided by number of tons of coal carbonized. TABLE 67.-Ammonia sold by coke-oven plants in the United States in 1923 TABLE 68.—Average monthly prices of sulphate of ammonia per 100 pounds, 1909– 1923 [Quotations, 1909-1916, abstracted from Oil, Paint, and Drug Reporter, at New York; 1917 to date, from Iron Trade Review, f. o. b. producers' works. Compiled by C. G. Atwater, of the Barrett Co.] BENZOL AND LIGHT OIL PRODUCTS TABLE 69.-Producers' price per gallon of pure benzol f. o. b. works and tank-wagon price of gasoline, 1919-1923, by months [Prices of benzol are those quoted by Iron Trade Review; of tank-wagon gasoline, average for five cities, computed by J. E. Pogue] TABLE 70.-Monthly spot prices of coal-tar products in New York market, 1919-1923 [As quoted by Oil, Paint, and Drug Reporter. Figures are averages of high and low quotations for each month] TABLE 71.-Production of motor fuel in the United States, 1918–1923, in gallons • From Bureau of Mines Refinery Statistics for 1923, by W. C. Hill. From reports of producers to the Geological Survey. As reported to the U. S. Tariff Commission. Of this only 2,177,000 gallons was sold, the balance being returned to the gas. • Data not available in comparable form. Quantity sold, used because of apparent double counting between production figures of crude and refined benzol. Can not be shown without disclosing individual returns. A Does not include a small amount of motor benzol which can not be shown without disclosing indi. vidual returns. TABLE 72.-Number of plants making light oil or derivatives, 1922–23 |