. Deep borehole surveys and problems. Boring. AUXILIARY REGISTRATIONS IN BOREHOLE SURVEYS 43 of the hole at the surface, are known with respect to the X and Y axes, and the depth of any point A on the wire can be found, since we can get the length L of the wire Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Haddock, M. H. (Marshall Henry). New York, McGraw-Hill

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