A Treatise on Mine-surveying |
From inside the book
Results 1-5 of 47
Page 2
... rules for the calcula- tion of areas of triangles , trapezoids , and circles . That the important mines of the ancient Greeks necessitated the solution of mine - surveying problems is shown by the fact that such problems are fully ...
... rules for the calcula- tion of areas of triangles , trapezoids , and circles . That the important mines of the ancient Greeks necessitated the solution of mine - surveying problems is shown by the fact that such problems are fully ...
Page 3
... rule , treasures every truth as a mystery to be carefully guarded for individual use only . Experience has often stored an individual mind with valuable facts , which are rarely recorded . The miner trusts to his memory , and , when he ...
... rule , treasures every truth as a mystery to be carefully guarded for individual use only . Experience has often stored an individual mind with valuable facts , which are rarely recorded . The miner trusts to his memory , and , when he ...
Page 11
... rule , performed with the object of determining the horizontal and vertical projections of the line . It is then necessary , in each case , to determine the angle of inclination formed by the measured line and the horizon . Lines are ...
... rule , performed with the object of determining the horizontal and vertical projections of the line . It is then necessary , in each case , to determine the angle of inclination formed by the measured line and the horizon . Lines are ...
Page 15
... rule , are measured at right angles to the chain . The length of the offset having been deter- mined , the position of the object is fixed with reference to the main line . Offsets may be measured with an offset rod , 10 links in length ...
... rule , are measured at right angles to the chain . The length of the offset having been deter- mined , the position of the object is fixed with reference to the main line . Offsets may be measured with an offset rod , 10 links in length ...
Page 19
... rules : -Walk two or three times over the ground in order to get a good idea of it , helping your memory with a rough sketch . The first line should be made as long as the place to be surveyed will allow , so that it may form a con ...
... rules : -Walk two or three times over the ground in order to get a good idea of it , helping your memory with a rough sketch . The first line should be made as long as the place to be surveyed will allow , so that it may form a con ...
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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.
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