. Deep borehole surveys and problems. Boring. PHOTOGRAPHIC METHODS 187 der. On the right is an accumulator with cells and on the left, on the tripod, a current switch connected to the accu- mulator and coupled to the cable reel. The 'plumbing cylinder has a non-magnetic casing 40 mm. wide, 10 mm. thick and 750 mm. long and is in three. Fig. 126.—Haussmana's apparatus assembled. parts; the lower one for taking the plumbing apparatus, the middle one the registering apparatus and the upper one the connection to the electric conductor. At the ends of the middle section are two corresponding gradua
. Deep borehole surveys and problems. Boring. PHOTOGRAPHIC METHODS 187 der. On the right is an accumulator with cells and on the left, on the tripod, a current switch connected to the accu- mulator and coupled to the cable reel. The 'plumbing cylinder has a non-magnetic casing 40 mm. wide, 10 mm. thick and 750 mm. long and is in three. Fig. 126.—Haussmana's apparatus assembled. parts; the lower one for taking the plumbing apparatus, the middle one the registering apparatus and the upper one the connection to the electric conductor. At the ends of the middle section are two corresponding graduated circles divided into 10-deg. intervals; the two other sections carry reading marks. The upper mark lies in the plane of symmetry of the suspension device and the lower one corresponds with channels in the lower casing in which. 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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