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 255
e ground in that distance rise 2 feet, (and which in practice may be determined pretty correctly by the eye), then the horizontal distance must be in-creased by something more than 1|- times 2 feet. ]When the surface descends, the estimated distance out, for |a level surface, should in like manner… … Dist. Left. CentreCut. Eight. - 4. - 4.56. A -4.9 -6.1A -6.44 - 7.411.1 The diagram represents an embankment cross section, inwhich, by reason of the small depth of filling, the height ofinstrument is a positive quantity. SEC. IV.] CROSS-SECTION LEYELIilNG. 253 The centre cut is —4.9; reading of…
Surveying
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