. Deep borehole surveys and problems. Boring. PROBLEMS 277 2. By the Versed Sine Method. The corrected measurement = (actual measurement) — (actual measurement X ver- sine of off-vertical angle) , BC - AD vers BAD. S3!|cldD3l6u\/ L|0IL|MO+43aj Ul |K)AJ3^UI. 0C3OO O C5 O O t~ iD tn ^ ro ro ex c-J — olo oo o o ooo o Lo Oo oo CJ o cyi^ o LD — _. — ""O cor- "^ "^ ^rpO Cvl Cvl — "— S8!|ddD ai6u\^ Moimm o+ +a3j U} £. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appeara

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. Deep borehole surveys and problems. Boring. PROBLEMS 277 2. By the Versed Sine Method. The corrected measurement = (actual measurement) — (actual measurement X ver- sine of off-vertical angle) , BC - AD vers BAD. S3!|cldD3l6u\/ L|0IL|MO+43aj Ul |K)AJ3^UI. 0C3OO O C5 O O t~ iD tn ^ ro ro ex c-J — olo oo o o ooo o Lo Oo oo CJ o cyi^ o LD — _. — ""O cor- "^ "^ ^rpO Cvl Cvl — "— S8!|ddD ai6u\^ Moimm o+ +a3j U} £. 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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