The Practical Miner's Guide: Comprising a Set of Trigonometrical Tables ... Also, a Treatise on the Art and Practice of Assaying Silver, Copper, Lead and Tin, with Tables which Exhibit ... the Value of Assayed Ores: Rules for Calculating the Power of Steam and Water Engines: a Discourse on the Quality, Manufacture, and Choice of Cordage for Mine Service ...

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Longman, Brown, Green, and Longmans, 1845 - 218 pàgines
 

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Pàgina 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.
Pàgina 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.

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