The nation is becoming concerned with the declining rate of discovery of crude petroleum and natural gas, particularly in areas readily accessible to safe transport for war and industrial uses. It seems, therefore, as certain as it is logical that the geological profession will be called upon for an extraordinary effort to assist in the correction of this situation.

Anticipation of the coming demand is evidenced in the present and in the recent past by the preoccupation of geological societies and related organizations with a critical analysis of discovery methods and the results therefrom. Among methods particularly favored for more...

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First page of Interpretation of Cable-Tool Drilling Logs<xref ref-type="fn" rid="fn1"><sup>1</sup></xref>: GEOLOGICAL NOTES
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