A Treatise on Mine-surveying |
From inside the book
Results 1-5 of 61
Page 2
... sight vanes , from which plumb - lines were suspended so as to enable the instrument to be levelled . With Hero's improved instrument , any angle could be measured . Indeed , it must be regarded as the origin of the highly perfect ...
... sight vanes , from which plumb - lines were suspended so as to enable the instrument to be levelled . With Hero's improved instrument , any angle could be measured . Indeed , it must be regarded as the origin of the highly perfect ...
Page 15
... sights fixed at right angles to each other on the upper end of a staff having a spike at its lower end for fixing into the ground . In taking offsets , the surveyor reads the tape at the chain . The ring of the tape is held at the point ...
... sights fixed at right angles to each other on the upper end of a staff having a spike at its lower end for fixing into the ground . In taking offsets , the surveyor reads the tape at the chain . The ring of the tape is held at the point ...
Page 28
... sights , one at the north , and the other at the south point . These sight vanes are divided into two parts , the upper one on one side having a fine slit cut throughout . The corresponding division of the opposite sight carries a plain ...
... sights , one at the north , and the other at the south point . These sight vanes are divided into two parts , the upper one on one side having a fine slit cut throughout . The corresponding division of the opposite sight carries a plain ...
Page 31
... sights , whilst the other is at right angles to it . They are so 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 ...
... sights , whilst the other is at right angles to it . They are so 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 ...
Page 32
... sight in which the observation is taken lies over the north and south line marked N S. This is to be placed in any required direction , and being fixed , the magnetic - needle is found . to rest , we will suppose , in the position indi ...
... sight in which the observation is taken lies over the north and south line marked N S. This is to be placed in any required direction , and being fixed , the magnetic - needle is found . to rest , we will suppose , in the position indi ...
Contents
153 | |
169 | |
170 | |
184 | |
204 | |
210 | |
217 | |
222 | |
60 | |
66 | |
74 | |
80 | |
87 | |
94 | |
103 | |
111 | |
119 | |
126 | |
132 | |
138 | |
147 | |
228 | |
232 | |
234 | |
237 | |
246 | |
252 | |
258 | |
265 | |
276 | |
283 | |
294 | |
295 | |
Other editions - View all
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.