. Deep borehole surveys and problems. Boring. ^j. jniended Course ofHole_ '^'Jy]'j.~iJ)r,r-Course265'?60' 200' of Hole 30^ Z20°Acfual4m ^""' 79^794° ?92 293 29i°294'' 292" 293 P I d n Fig. 136.—Actual survey of a Portuguese borehole. typical borehole survey from Portugal constructed from such records. We are indebted to the proprietors of Engineering, and C. F. Casella & Co., London, the makers,. Fig. 137. for the photographic views showing (Fig. 137) the compass and chnometer, (Fig. 138) the casing and inner parts ready for assembly and (Fig. 139) the clino
. Deep borehole surveys and problems. Boring. ^j. jniended Course ofHole_ '^'Jy]'j.~iJ)r,r-Course265'?60' 200' of Hole 30^ Z20°Acfual4m ^""' 79^794° ?92 293 29i°294'' 292" 293 P I d n Fig. 136.—Actual survey of a Portuguese borehole. typical borehole survey from Portugal constructed from such records. We are indebted to the proprietors of Engineering, and C. F. Casella & Co., London, the makers,. Fig. 137. for the photographic views showing (Fig. 137) the compass and chnometer, (Fig. 138) the casing and inner parts ready for assembly and (Fig. 139) the clinometer and contact 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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