A Treatise on Mine-surveying |
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Page xi
... Adjustments of the theodolite , Measuring horizontal angles , Repetition , · Measurement of vertical angles , The solar attachment , . PAGE 60 60 61 62 63 64 65 66 74 74 77 77 78 79 80 80 82 84 138885 89 89 90 92 93 94 96 97 98 99 ...
... Adjustments of the theodolite , Measuring horizontal angles , Repetition , · Measurement of vertical angles , The solar attachment , . PAGE 60 60 61 62 63 64 65 66 74 74 77 77 78 79 80 80 82 84 138885 89 89 90 92 93 94 96 97 98 99 ...
Page xiii
... adjustments of the level , 153 ( d . ) Cushing's reversible level , 154 The levelling - staff , 154 · Mine levelling - staves , 156 · Practice of levelling , Section levelling , Bench marks , 158 162 167 ( e . ) The reflecting level ...
... adjustments of the level , 153 ( d . ) Cushing's reversible level , 154 The levelling - staff , 154 · Mine levelling - staves , 156 · Practice of levelling , Section levelling , Bench marks , 158 162 167 ( e . ) The reflecting level ...
Page 12
... adjusted before the commencement of every survey , or at any rate from time to time . This is best done by having a standard marked on a level path- way or on the top of a wall , showing not only the accurate length of the chain , but ...
... adjusted before the commencement of every survey , or at any rate from time to time . This is best done by having a standard marked on a level path- way or on the top of a wall , showing not only the accurate length of the chain , but ...
Page 23
... adjusted with facility to long or short steps . The usual step is the military pace of 30 inches , 108 of these paces per minute representing a velocity of 3.07 miles an hour . If no unfavourable conditions come into play , for example ...
... adjusted with facility to long or short steps . The usual step is the military pace of 30 inches , 108 of these paces per minute representing a velocity of 3.07 miles an hour . If no unfavourable conditions come into play , for example ...
Page 31
... adjusted that when the bubbles are in the centres of the tubes , the dial is level . Spirit - levels are usually filled with alcohol or ether . The bubble , being specifically lighter than the liquid , always assumes the highest ...
... adjusted that when the bubbles are in the centres of the tubes , the dial is level . Spirit - levels are usually filled with alcohol or ether . The bubble , being specifically lighter than the liquid , always assumes the highest ...
Contents
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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.
Page 23 - SHELTON-BEY (W. Vincent, Foreman to the Imperial Ottoman Gun Factories, Constantinople) : THE MECHANIC'S GUIDE : A Hand-Book for Engineers and Artizans. With Copious Tables and Valuable Recipes for Practical Use. Illustrated. Second Edition. Crown 8vo. Cloth, 7/6.
Page 21 - No more enduring Memorial of Professor Rankine could be devised than the publication of these papers in an accessible form. . . . The Collection is most valuable pa account of the nature of his discoveries, and the beauty and completeness of his analysis.
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.