U. S. Geological Survey, Mineral Resources of the United States in 1921, Part II. *U. S. Geological Survey, Mineral Resources of the United States in 1923, Part II. Letter from Frank J. Katz, Engineer in Charge, Division of Mineral Resources and Statistics, U. S. Department of Comnierce, Bureau of Mines, Washington, D. C., dated January 6, 1926.

NUMBER OF PRODUCING WELLS (OIL AND GAS) DRILLED IN THE DIFFERENT FIELDS

*3 Figures according to the Statistical Department of the Standard Oil Company of Louisiana.

COMPARATIVE FIGURES SHOWING ANNUAL PRODUC-
TION OF THE LEADING OIL-PRODUCING STATES
U. S. Geological Survey Figures