U, S, Geological Survey Report on the Mineral Resources of the United States for 1903. According to the report, we produced in 1903, gallons of coal tar. The value of the coal tar produced in that year was while the value of the imports of chemicals obtained from coal tar for the fiscal year ending June 3oth, 1963, was with a duty of making a total of The report in conclusion states that, A conservative estimate would place the total value of these products in the wholesale markets of this country in both 1902 and 1903 at From the foregoing statistics, we can readily see how profitable to other nations is our wastefulness of valuable by-products.

Coal tar constituents and products have been the subjects of investigation and study for years, but water gas tar possibilities seem to have been somewhat overlooked or deemed unimportant by those in the field of research. On this account, an investiga - tion, if it is worthy of being considered such, of water gas tar appeared to be the more attractive problem of the two, and hence was undertaken with the hope of enlarging its field of usefulness.

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