A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 203
given inEig. 200. The upper plate, or vernier-plate, A, A, carries the verniers, compass-box, and telescope. It is attached to its socket by the flange, K. This socket is fitted to the outside, conical surface of the main socket, C. The main socket, to which is attached the divided limb, B, B, is… … together. The clamp is at F. Two of the four leveling screwsare shown in section. The spindle, H, passes through the upperparallel plate, and is attached to a movable section of the lowerparallel plate by a ball-and-socket joint. The leveling screwspass through the upper parallel plate, and. rest…
Surveying
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