Manual of modern surveying instruments and their uses .. (1893)
Lietz, firm, math. instr. makers, San Francisco. (1893. The A. Lietz company) [from old catalog] · [San Francisco] The Company · leaf 205
Attwoods Clinometer, showing Compass,I s the graduated circle, which is kept in place by a small spring at A, a slighti be -re on the knob of which sets the circle free, and on the removal of the fingersthe instrument can be taken up and the angle of inclination easily read.D represents a compass… … Circle of Attwoods Clinometer.With this clinometer and a small straight-edge the under lay of any metalliferousvein may be accurately taken, and in positions where a larger instrument could notbe used: also the dip of anv bed. or stratum of rock or seam of coal. Timbering of anv level shaft or…
Surveying
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