Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 242
te delineation onpaper. By the Plane-Table. 268. The plane-table. Fig. 127, consists of two parts: arectangular board, and a tripod to which it is firmly secured. Directly under the rectangular board are four milled screwswhich pass through sockets inserted in a horizontal brass-plate ;these screws… … Fig. 12T. Between the upper horizontal plate and the table, there Isa clamp-screw, similar to the clamp-screw of the transit, whichbeing loosened, the table can be turned freely about its axis.There is, also, a small tangent screw, by which the smallermotions of the table are regulated, after the…
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