The Mineral Surveyor Valuer's Complete Guide

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Excerpt from The Mineral Surveyor Valuer's Complete Guide: Comprising a Treatise on Improved Mining Surveying and the Valuation of Mining Properties With New Traverse TablesTheir application to surveys of mineral workings or Openings which pitch highly must also be a matter Of great utility, and they will supply a very ready medium, by which to ascertain the horizontal measure Of the different pitches of the lines taken, which Often vary very much in the same mine or colliery.The use Of the Magnetic needle is herein strongly defended, as being more generally applicable, as a rule, to mining surveying than any other system that can be suggested. But the author takes the liberty of sub mitting that the magnetic meridian is not a satisfactory base of working: and a description will be found herein Of an improved circumferentor, by the use of which the True Meridian may be made the regular working base, instead Of the Magnetic Meridian, and by which the error occasioned by the constantly varying declination of the latter may be effectually guarded against.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.