What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
A Treatise on the Principles and Practice of Levelling: Showing Its ...
Frederick Walter Simms
No preview available - 2018
50 base adjustments appear back sight back staff bench mark calculation centre line centre stake chain clinometer computed half width cross wires curve cuttings and embankments datum line depth of cutting described diagram difference of level direction distance Dover Castle Dumpy Level earth error example eye-piece field-book Folkstone Foot of bank fore sight forward reading forward station give gradient ground Gunter's chain hinge-joint horizontal line hypothenuse inches inclination instrument length levelling staves lines of railway London Bridge mean height measured ment method middle area miles natural surface º º object glass observer obtain outer rail parallax perpendicular placed plate point H practice radius of curvature ratio reduced levels represent result right angles Sir Henry Parnell Sir John Macneill slope spirit-level stones subtracted superelevation surface line surveyor Tables Tabular tance telescope theodolite tion Top of bank true level turnpike road