A Treatise on Mine-surveying |
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Results 1-5 of 78
Page 7
... feet or 2 yards . The chain of 66 feet or 22 yards ; 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 ...
... feet or 2 yards . The chain of 66 feet or 22 yards ; 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 ...
Page 8
... feet , or 39-37043 inches . For mine - surveys the metre is the unit now almost exclusively used in continental European countries . It is also employed on Government surveys in the United States . Special units of length used for ...
... feet , or 39-37043 inches . For mine - surveys the metre is the unit now almost exclusively used in continental European countries . It is also employed on Government surveys in the United States . Special units of length used for ...
Page 11
... feet in length ; 80 chains being equal to 1 mile . This length was chosen by the inventor , Edmund Gunter , in 1620 ... feet and feet into links : - CHAINS INTO FEET . FEET INTO LINKS . Chains . THE MEASUREMENT OF DISTANCES . 11 CHAPTER ...
... feet in length ; 80 chains being equal to 1 mile . This length was chosen by the inventor , Edmund Gunter , in 1620 ... feet and feet into links : - CHAINS INTO FEET . FEET INTO LINKS . Chains . THE MEASUREMENT OF DISTANCES . 11 CHAPTER ...
Page 12
Bennett Hooper Brough. CHAINS INTO FEET . FEET INTO LINKS . Chains . Feet . Feet . Links . 0.01 0.66 1.00 1515 0.02 1.32 2.00 3 : 030 0.03 1.98 3:00 4.545 0.04 2.64 4.00 6.060 0.05 3.30 5:00 7.575 0.06 3.96 6:00 9.090 0.07 4.62 7:00 ...
Bennett Hooper Brough. CHAINS INTO FEET . FEET INTO LINKS . Chains . Feet . Feet . Links . 0.01 0.66 1.00 1515 0.02 1.32 2.00 3 : 030 0.03 1.98 3:00 4.545 0.04 2.64 4.00 6.060 0.05 3.30 5:00 7.575 0.06 3.96 6:00 9.090 0.07 4.62 7:00 ...
Page 13
... feet in length , and is provided with brass marks at every fathom . Each link of the chain is 6 inches in length . The chain is some- times made entirely of brass . No advantage is gained by using Gunter's chain in a metalliferous mine ...
... feet in length , and is provided with brass marks at every fathom . Each link of the chain is 6 inches in length . The chain is some- times made entirely of brass . No advantage is gained by using Gunter's chain in a metalliferous mine ...
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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 colour compass compass-box 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 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 plate plotting plumb-bob plumb-line plummet position protractor represented right angles safety-lamp scale seam shaft side Silver King spirit-level square staff station station-line strike and dip surface surface-surveys survey tacheometer tacheometry taken tangent screw telescope theodolite transit-theodolite traverse triangle tripod tube underground vernier vernier-plate vertical angles wire yards zero