A Treatise on the Principles and Practice of Levelling ... |
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A Treatise on the Principles and Practice of Levelling: Showing Its ... Frederick Walter Simms No preview available - 2015 |
A Treatise On the Principles and Practice of Levelling: Showing Its ... Frederick Walter Simms No preview available - 2018 |
Common terms and phrases
a₁ adjustments assumed datum b₁ b₂ Back Fore back sight back staff bench mark Bottom of ditch calculation centre line centre stake clinometer columns of Rise computed half width cross wires curve cuttings and embankments datum line depth of cutting diagram difference of level direction distance Dover Castle Dumpy Level earth Edge of ditch equal example fall field-book Folkstone Foot of bank fore sight forward reading forward staff give ground Gunter's chain horizontal line hypothenuse inches inclination instrument length line A B lines of railway London Bridge mean height measured method middle area mile observer obtain parallax perpendicular placed Plate point H practice radius radius of curvature ratio reduced levels represent right angles road second forward station Sir Henry Parnell slope spirit-level starting point subtract superelevation surface line surveyor Tables tances tangent telescope theodolite tion Top of bank yards