A Treatise on Mine-surveying |
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Page xii
... divided scales ,. 2. Diagonal scales , 3. Vernier scales , . Plotting scales , Plotting with a protractor , Plotting by means of chords , Plotting by rectangular co - ordinates , . Calculating scales , Traverse tables , CHAPTER XII ...
... divided scales ,. 2. Diagonal scales , 3. Vernier scales , . Plotting scales , Plotting with a protractor , Plotting by means of chords , Plotting by rectangular co - ordinates , . Calculating scales , Traverse tables , CHAPTER XII ...
Page 5
... divided into tabular deposits , including mineral veins , beds , and seams , and irregular deposits , including masses , stock- works , and pockets . Tabular deposits are those in which two dimensions predominate . The third smaller ...
... divided into tabular deposits , including mineral veins , beds , and seams , and irregular deposits , including masses , stock- works , and pockets . Tabular deposits are those in which two dimensions predominate . The third smaller ...
Page 7
... divided into 4 poles of 5 yards , and 100 links of 7.92 inches . The statute mile of 1,760 yards or 5,280 feet or 80 chains , divided into 8 furlongs . The standard yard is the distance between two fixed points on a certain metal rod at ...
... divided into 4 poles of 5 yards , and 100 links of 7.92 inches . The statute mile of 1,760 yards or 5,280 feet or 80 chains , divided into 8 furlongs . The standard yard is the distance between two fixed points on a certain metal rod at ...
Page 8
... divided into 360 parts ; each part being termed a " degree . " The degree is divided into 60 minutes , and the minute into 60 seconds . This is known as the sexagesimal division . The French centesimal division of the quadrant into 100 ...
... divided into 360 parts ; each part being termed a " degree . " The degree is divided into 60 minutes , and the minute into 60 seconds . This is known as the sexagesimal division . The French centesimal division of the quadrant into 100 ...
Page 11
... divided into fathoms , yards , links , feet , or some other unit of measure- ment . ( a . ) The Chain . The instrument most frequently used in sur- veying is the chain . In coal - mines and in field - surveying , Gunter's chain is ...
... divided into fathoms , yards , links , feet , or some other unit of measure- ment . ( a . ) The Chain . The instrument most frequently used in sur- veying is the chain . In coal - mines and in field - surveying , Gunter's chain is ...
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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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