A Treatise on Mine-surveying |
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Page 36
... lode , and continues on the lode . As there is a sharp turn at this point , offsets are measured to the north and south , as well as to the right and left . At F a cross - cut is driven south of the lode . The dial being set up at F ...
... lode , and continues on the lode . As there is a sharp turn at this point , offsets are measured to the north and south , as well as to the right and left . At F a cross - cut is driven south of the lode . The dial being set up at F ...
Page 53
... due to the presence of magnetic iron ore in the lode , is very considerable . At Botallack mine , in Cornwall , for example , the needle has been known to be deflected SURVEYING WITH THE MAGNETIC - NEEDLE . 53 Local attraction in the mine,
... due to the presence of magnetic iron ore in the lode , is very considerable . At Botallack mine , in Cornwall , for example , the needle has been known to be deflected SURVEYING WITH THE MAGNETIC - NEEDLE . 53 Local attraction in the mine,
Page 128
... Lode . - Beginning at corner No. 1 , identical with corner No. 1 of the location . A spruce post , feet long 4 inches square , set 2 feet in the ground , with a mound of stone marked ( 1 ) 4225 A , whence the W. corner Section 22 ...
... Lode . - Beginning at corner No. 1 , identical with corner No. 1 of the location . A spruce post , feet long 4 inches square , set 2 feet in the ground , with a mound of stone marked ( 1 ) 4225 A , whence the W. corner Section 22 ...
Page 129
... lode , at N. 25 ° 56 ′ W. , 285 13 feet from corner No. 1. 65 feet intersect line 5-6 of this survey . 300 feet to corner No. 1 , the place of beginning . Gold Queen Lode . - Beginning at corner No. 5 , a pine post , 5 feet long , 5 ...
... lode , at N. 25 ° 56 ′ W. , 285 13 feet from corner No. 1. 65 feet intersect line 5-6 of this survey . 300 feet to corner No. 1 , the place of beginning . Gold Queen Lode . - Beginning at corner No. 5 , a pine post , 5 feet long , 5 ...
Page 130
Bennett Hooper Brough. burg lode , 2.679 acres , with Silver King lode ( exclusive of conflict of said Silver King lode with the Gottenburg lode ) , 1.309 acres . Net area of Gold Queen lode , 6.309 acres . The net area of the lode claim ...
Bennett Hooper Brough. burg lode , 2.679 acres , with Silver King lode ( exclusive of conflict of said Silver King lode with the Gottenburg lode ) , 1.309 acres . Net area of Gold Queen lode , 6.309 acres . The net area of the lode claim ...
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Common terms and phrases
accuracy accurate alidade axis base-line bearing bore-hole brass calculated centre chain circle City Guilds clamped clinometer coal colliery colour compass construction contour lines cosec cotan cross-wires curve deposit determined direction distance employed engineer equal error EXETER STREET fathoms feet fixed glass graduated ground height hole horizontal Hydraulic inclination instrument iron isogonic lines latitude length line of intersection lode London magnetic bearing magnetic meridian magnetic-needle marked means measured method mine-surveying miner's dial mineral mines needle observations obtained offset Ordnance Survey parallel parallel ruler perpendicular placed plane plate plotting plumb-bob plumb-line plummet pole position protractor representing right angles safety-lamp scale seam shaft side sight spirit-level square staff station station-line strike and dip surface surface-surveys survey tacheometer tacheometry telescope theodolite transit-theodolite traverse triangle tripod tube tunnel underground vernier vernier-plate vertical angles wire yards