. Deep borehole surveys and problems. Boring. 244 DEEP BOREHOLE SURVEYS AND PROBLEMS We may consider this accessory information yielded by this method in the same way as Professor Heiland of the Colorado School of Mines. In Fig. 162 we have a hard limestone overlain by loose sandy clays, the former having a wave velocity of ?^ and the latter of Vi when a charge is fired at S. The shock wave intervals are measured off on the graph, shown where the scales E of the concussion are set off at inter- vals of 200 and 280 m.; the corre- sponding times are the ordinates. At El and Eo the course-time an
. Deep borehole surveys and problems. Boring. 244 DEEP BOREHOLE SURVEYS AND PROBLEMS We may consider this accessory information yielded by this method in the same way as Professor Heiland of the Colorado School of Mines. In Fig. 162 we have a hard limestone overlain by loose sandy clays, the former having a wave velocity of ?^ and the latter of Vi when a charge is fired at S. The shock wave intervals are measured off on the graph, shown where the scales E of the concussion are set off at inter- vals of 200 and 280 m.; the corre- sponding times are the ordinates. At El and Eo the course-time and wave velocities are proportionate (straight-line law), the shock being in Distance. 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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