. Deep borehole surveys and problems. Boring. 154 DEEP BOREHOLE SURVEYS AND PROBLEMS The central plate c holds a frame d carrying a graduated glass plate e. A rotatable spindle / in the center of these &. Fig. 93. plates c and e carries a plumb line g on an arm h, and also a graduated index i slotted to take the plumb line. In the bottom of the tube are four electric incandescent. 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 origina
. Deep borehole surveys and problems. Boring. 154 DEEP BOREHOLE SURVEYS AND PROBLEMS The central plate c holds a frame d carrying a graduated glass plate e. A rotatable spindle / in the center of these &. Fig. 93. plates c and e carries a plumb line g on an arm h, and also a graduated index i slotted to take the plumb line. In the bottom of the tube are four electric incandescent. 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
