. Deep borehole surveys and problems. Boring. 68 DEEP BOREHOLE SURVEYS AND PROBLEMS is pushed aside, so that the rod h turns and with it the ring g to arrest the needle /. The descent of the pin I cannot be directly effected by the rinsing water, but when the lead ball n is dropped in the rods it deflects the current and its surface is sufficient to considerably hinder its momentum. When ball n meets the pin I the obstructed current throws a back pressure. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
. Deep borehole surveys and problems. Boring. 68 DEEP BOREHOLE SURVEYS AND PROBLEMS is pushed aside, so that the rod h turns and with it the ring g to arrest the needle /. The descent of the pin I cannot be directly effected by the rinsing water, but when the lead ball n is dropped in the rods it deflects the current and its surface is sufficient to considerably hinder its momentum. When ball n meets the pin I the obstructed current throws a back pressure. 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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Keywords: ., bookcentury1900, bookcollectionb, bookpublishernewyorkmcgrawhill
