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The Practical Miner's Guide: Comprising a Set of Trigonometrical Tables
No preview available - 2016
adit angle opposite Answer ascer assay base and perpendicular Blaenavon Borax calcined capstan centre Comp computation copper course of dialling cross-course cross-cut cross-staff crucible Decimals degrees depth diagonal shaft dialling book diameter dicular distance ditto draft drawing driving DUCHY OF CORNWALL dwts east and west error EXAMPLE fath fathom level feet 7 inches flux foot foregoing given side Given the angle heaves horizontal hypothenuse instrument intersect lode measure method miner mining multiply needle nitre northerly observed operation parallel ruler pendicular Perp perpen perpendicular shaft PRACTICAL MINER'S GUIDE protractor radius required to know right angles right line rope RULE silver slide south of east square standing subtract sunk surface survey Tabular theodolite traverse trigono trigonometrical tables vernier scale vertical weight whole numbers winze yarns
Page 131 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Page iii - PRACTICAL MINER'S GUIDE; Comprising a Set of Trigonometrical Tables adapted to all the purposes of Oblique or Diagonal, Vertical, Horizontal, and Traverse Dialling ; with their application to the Dial, Exercise of Drifts, Lodes, Slides, Levelling, Inaccessible Distances, Heights, &c.