A Treatise on Mine-surveying |
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Page vi
... . , who ably assisted me while the volume was passing through the press . THE ROYAL SCHOOL OF MINES , LONDON , February , 1888 . BENNETT H. BROUGH . PREFACE TO THE SECOND EDITION . THE First Edition having vi PREFACE .
... . , who ably assisted me while the volume was passing through the press . THE ROYAL SCHOOL OF MINES , LONDON , February , 1888 . BENNETT H. BROUGH . PREFACE TO THE SECOND EDITION . THE First Edition having vi PREFACE .
Page 29
... passes exactly through the centre of the cap . It must be sufficiently magnetised , and , when placed on its pivot , must assume a horizontal position . A needle which is horizontal before being magnetised , will dip after having been ...
... passes exactly through the centre of the cap . It must be sufficiently magnetised , and , when placed on its pivot , must assume a horizontal position . A needle which is horizontal before being magnetised , will dip after having been ...
Page 39
... passing through the points on the horizon indicated by the needle , is called the magnetic meridian , in the same way as a similar plane passing through the north and south poles is known as the true meridian of the place . The angle ...
... passing through the points on the horizon indicated by the needle , is called the magnetic meridian , in the same way as a similar plane passing through the north and south poles is known as the true meridian of the place . The angle ...
Page 41
... passing east of the West Indies , crosses the United States , passing just east of Charleston , South Carolina , and just west of Detroit , Michigan . It then passes through the North Pole , crosses Lapland to the Caspian , cuts the ...
... passing east of the West Indies , crosses the United States , passing just east of Charleston , South Carolina , and just west of Detroit , Michigan . It then passes through the North Pole , crosses Lapland to the Caspian , cuts the ...
Page 45
... passes the cross - wires of the telescope , the latter is clamped , and both the horizontal and vertical circles of the instrument are read . The telescope is then allowed to remain with its inclination unchanged , and after a time the ...
... passes the cross - wires of the telescope , the latter is clamped , and both the horizontal and vertical circles of the instrument are read . The telescope is then allowed to remain with its inclination unchanged , and after a time the ...
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Common terms and phrases
accuracy accurate adjusted back-sight base-line bearing bore-hole brass calculated centre chain City Guilds clamped clinometer coal colliery collimation coloured compass contour lines cord corner cosec cotan cross-wires curve determined direction distance employed equal error fathoms feet fixed fore-sight glass graduated ground height hole horizontal circle inches inches in diameter inclination instrument intersection latitude length line of sight lode magnetic bearing magnetic meridian magnetic-needle marked means measured method metres mine-surveying miner's dial mines needle observations obtained offsets Ordnance Survey parallel parallel ruler perpendicular placed plane planimeter plate plotting plumb-bob plumb-line plummet position protractor represents right angles safety-lamp scale seam shaft side spirit-level square staff station station-line strike and dip surface surface-surveys survey tacheometer tacheometry tangent screw telescope theodolite transit-theodolite traverse triangle tripod tube underground vernier vernier-plate vertical angles wire yards
Popular passages
Page 17 - A Pocketbook of Electrical Rules and Tables for the use of Electricians and Engineers.
Page 16 - TABLE, in place of the usual Fifteen minute computations required. This alone is evidence of the assistance which the Tables ensure to every user, and as every Surveyor in active practice has felt the want of such assistance FEW KNOWING OF THEIR PUBLICATION WILL REMAIN WITHOUT THEM.
Page 25 - Contains the pith of what has been written by the best scholars on the subject. The notes comprise everything that the student can want.
Page 20 - With appendix, tables, tests, and formulae for the use of Electrical Engineers. Comprising Submarine Electrical Engineering, Electric Lighting, and Transmission of Power. By Andrew Jamieson, CE, FRSE Seventh edition.
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Page 23 - AE A Manual of Marine Engineering. Comprising the Designing, Construction and Working of Marine Machinery.
Page 21 - In order to render the work complete for the purposes of the Shipbuilder, whether at home or abroad, the Methods of Calculation introduced by Mr. FK BARNES. Mr. GRAY, M.
Page 33 - GRAY'S (Thomas) POETICAL WORKS. With Life by the Rev. JOHN MITFORD, and Essay by the EARL of CARLISLE. With Portrait and numerous Engravings on Steel and Wood. Elegantly printed on toned paper.