A complete treatise on practical land-surveying, in seven parts; (1839)
Nesbit, A[nthony], 1778-1859. [from old catalog] · London, Longman, Orme, Browne, Green, and Longmans; [etc., etc.] · leaf 248
line at 4. Lay the ruler from 4 to 7; move it parallel to 6; and markthe temporary line at 5. Lay the ruler from 5 to 8; move it parallel to 7 ; and markthe temporary line at 6. Draw a line from 8 to 6 ; and 8, 1, 6, is the triangle required ;hence the area of the irregular offset may be found by… … 1 A 3 2 Produce the base A B, both ways, at pleasure, for a tem-porary line. Lay the ruler from A to H; move it parallel to K; andmark the temporary line at 1. Lay the ruler from 1 to G; move it parallel to H ; and markthe temporary line at 2. Lay the ruler from 2 to F; move it parallel to G; and…
Surveying
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