The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 370
e his claim surveyed and recorded. He then decideshow much of the 1500 feet he desires to extend on either side ofhis discovery-shaft along the vein. He is governed in thisby various considerations, such as his proximity to other claims,the promise of mineral in different portions of the lode, or… … Fig. 96. 342 SURVEYING. location at the point of discovery, and runs from it in oppositedirections until he has measured off 1500 feet. The survey has thus far been run on the centre line of theclaim. On arriving at the ends of the line, the surveyormeasures off half the width of the claim on each…
Surveying
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