LOW TEMPERATURE CARBONIZATION [To the Editor of the SPECTATOR.]
Sin,—Although professionally connected with what I might call the rival industry of fuel-oil in Mexico, I am greatly interested in your very laudable efforts to further the more economical exploitation of coal in my native Britain, and in this connexion (and with special reference to the particularly enlightening letter of Colonel N. Graham Thwaites, in your issue of June 26th last) I beg to be allowed to furnish you with some statistics which I have procured for the purpose from the Colorado Fuel and Iron Company, of Denver, U.S.A. (in which city I happen to be temporarily sojourning). From one ton (American, 2000 lb.) of bituminous coal the company referred to obtains in actual practice the following products, viz. :— Coke.. 1,400 lbs. Pure Benzol .. 11 gala Coke Breeze .. 60 lbs. Toluol gal. Gas .. • • 7,500 cu. ft. 271o1 .. 3/10 gal. Ammonium Sulphate 25 lbs. Pitch Tar .. • .. 10 gals. Naphthalene .. 5 lbs.
1 lb.
Light Oil .•. 31 gals. Creosote .. 1 Qt. Motor Benzol 21 gals. Paint 1 Qt. [Annual capacity of ovens, 540,000 tons (American) Coke.]
(Of Apartado 34 Ms, City of Mexico, Mexico.) Denver, Colorado.
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