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 198
42 14 31 47 15 32 52 16 33 54 17 34 55 18 35~ 54 19 36 52 20 37 49 21 38 44 22 39 39 23 40 32 24 Note.—To construct the above Table, suppose the base A B, in the pre-ceding triangle, to be = 99.5, and the hypothenuse A C = 100 ; then, byTrig, as 100 : 1 :: 99.5 : .995, the nat. co-sine of the angle… … By those who do not wish to incur the expense of a Theo-dolite, a Quadrant may be made of about twelve inches radius,by which the altitude of a hill, steeple, &c. may be taken to atolerable degree of accuracy. The arc A B must be correctly divided into 90 equal partsor degrees ; and numbered…
Surveying
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