A Treatise on Mine-surveying |
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Results 1-5 of 46
Page
... Iron - Cobalt - Nickel - Mercury - Bismuth - Lead - Aluminium - Copper - Tin - Gold— " The value of this work is almost inestimable . " - Mining Journal . Silver - Platinum , & c . ** Many NOTABLE ADDITIONS will be found in the sections ...
... Iron - Cobalt - Nickel - Mercury - Bismuth - Lead - Aluminium - Copper - Tin - Gold— " The value of this work is almost inestimable . " - Mining Journal . Silver - Platinum , & c . ** Many NOTABLE ADDITIONS will be found in the sections ...
Page x
... IRON . Influence of iron rails , Local attraction in the mine , Dialling - book , . . Surveying with the dial in the presence of iron , Errors in compass surveys , Vernier , Racking , CHAPTER VI . SURVEYING WITH THE FIXED NEEDLE . 51 ...
... IRON . Influence of iron rails , Local attraction in the mine , Dialling - book , . . Surveying with the dial in the presence of iron , Errors in compass surveys , Vernier , Racking , CHAPTER VI . SURVEYING WITH THE FIXED NEEDLE . 51 ...
Page xi
... iron , CHAPTER VIII . THE THEODOLITE . Historical sketch , Description of the theodolite ,. The telescope ,. Various forms .— ( a . ) Hoskold's transit - theodolite , ( b . ) The Everest theodolite , ( c . ) The Hoffman tripod head ...
... iron , CHAPTER VIII . THE THEODOLITE . Historical sketch , Description of the theodolite ,. The telescope ,. Various forms .— ( a . ) Hoskold's transit - theodolite , ( b . ) The Everest theodolite , ( c . ) The Hoffman tripod head ...
Page xv
... iron ore , 265 ( 1. ) Brooks ' method , 269 ( 2. ) Thalén's method , 270 ( 3. ) Tiberg's method , 273 Use of the magnetic - needle in surveying bore - holes , . 276 Employment of a powerful magnet in cases of uncertain holing , 279 PAGE ...
... iron ore , 265 ( 1. ) Brooks ' method , 269 ( 2. ) Thalén's method , 270 ( 3. ) Tiberg's method , 273 Use of the magnetic - needle in surveying bore - holes , . 276 Employment of a powerful magnet in cases of uncertain holing , 279 PAGE ...
Page 5
... iron ore , gold placers , and tin stream - works . In the former case , they are younger than the floor , and older than the roof . As stratified deposits , they were originally deposited in a more or less hori- zontal form , and follow ...
... iron ore , gold placers , and tin stream - works . In the former case , they are younger than the floor , and older than the roof . As stratified deposits , they were originally deposited in a more or less hori- zontal form , and follow ...
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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
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