A Practical Treatise on Mine Surveying
Longmans, Green and Company, 1902 - 414 Seiten
Lupton's textbook on mine surveying includes the more advanced subjects of trigonometrical plotting, hypsometry, method of finding the true north, metalliferous mine surveying, and photographic surveying.
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accuracy accurate acre adjusted angle Answer ascertained axis base bearing calculated centre chain circle coal column compass convenient correct course Crown 8vo curve cutting depth Diagrams dial difference direction distance divided drawing drawn Engineering equal error feet figure fixed give given graduated ground height horizontal Illustrations inches inclination length less light logarithm London lower magnetic mark means measured meridian method mining minutes moved natural necessary needle noted observed obtained offsets ordinary parallel placed plane Plates plotted pole position PRACTICAL Professor radius reduced reference road rule scale screw seam shaft shown in Fig shows side sight sine square staff star station straight surface survey surveyor taken telescope temperature theodolite thickness triangle tube turned vernier vertical wire yards
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