Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 235
hthe natural surface; and also, to afibrd data for the estimateof the amount of earth to be removed, or filled. 49. The following example will exhibit the method of re-cording the notes of a section level. The datum line is assumed 232 ELEMENTS OF SURYETING. [BOOK m. to be thirty feet below the… … Dist. + Sight. Ht. of Ins. — Sight. SurfaceHeight. GradeHeight. Remarks. Bench.0 1 1.637 31.637 2.11.8 30. . 29.5 29.8 Bench on top offence -post 30 ft. north of 0 stake. -1 60 0.9 30.7 2 3.4 28.2 3 10.8 20.8 T. P. 1.910 22.134 11.413 20.224 4 5.8 16.3 5 9.0 13.1 5^° 10.4 11.7 6 9.8 12.3 7 10.6 •…
Surveying
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