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 365
alled anAdit. An Incline or Slope is a tunnel run at an angle to the hori-zontal. 334 SURVEYING. A Drift is a tunnel starting from an underground workingsuch as a shaft. When there are a series of drifts at differentdepths, they are termed Levels; as first level, siecond level,or 50-foot level,… … A Winze is a shaft sunk from a level. A Cross-cut is a level driven across the course of a vein. An Air-course is a tunnel driven for the purpose of venti-lation. An Entry is a passage through a mine. A Chamber is a large room from which the ore is mined. The last two terms are used more especially…
Surveying
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