Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 245
been moved from over the extremity of thebase-hne, move the legs of the tripod until it is broughtback to its place. Let the table be then leveled, after which,place the ruler again on the base-line, and bring the tableto its proper position, by the tangent-screw, and continue theadjustment until… … Fig. 128. all the objects sighted to, from the other station, and markthe lines 1, 2, 3, 4, &c., from the base-line, as before. Theintersections of the corresponding lines 1,1, 2,2, 3,3, 4,4, &c.,determine, on the paper, the positions of the several objects,and a reference of these lines to…
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