Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 17-17
... survey is then substituted for the old approx compass survey ( Art 11 and 15 ) . Magnetic declination is the angle which the needle makes with the true meridian . When necessary to determine this angle accurately , the true meridian is ...
... survey is then substituted for the old approx compass survey ( Art 11 and 15 ) . Magnetic declination is the angle which the needle makes with the true meridian . When necessary to determine this angle accurately , the true meridian is ...
Halaman 17-57
... survey may be necessary ; else- where the boundaries must be acceptable to the Com'r of the General Land Office . In general , as the boundaries are meridians and east - west lines , an area much larger than the claim itself may ...
... survey may be necessary ; else- where the boundaries must be acceptable to the Com'r of the General Land Office . In general , as the boundaries are meridians and east - west lines , an area much larger than the claim itself may ...
Halaman 17-60
... SURVEY is a detailed mapping of route chosen as a result of reconnaissance . LoCATION SURVEY follows , consisting in staking out the railroad as straight lines and curves . A mining engineer is often called upon to lay out highways , or ...
... SURVEY is a detailed mapping of route chosen as a result of reconnaissance . LoCATION SURVEY follows , consisting in staking out the railroad as straight lines and curves . A mining engineer is often called upon to lay out highways , or ...
Isi
AND SORTING OF ORES | 15 |
ELECTRIC POWER | 16-1 |
sion Wiring | 19-1 |
Hak Cipta | |
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adjustment Aerial Tramway anthracite approx assay aver borax buckets Bur Mines capac carriers cars charge chute claim coal mines compressor concentrate conveyer copper cost crusher crushing cu ft cupel cyanide deflection diam discharge distance drill dust elev engineer explosions feed filter fire firedamp gold grade hoisting horiz intercooler labor lamp less litharge loaders loading lode long ton machine material mechanical metal method mill mineral motor operation pipe plant plate plumb-bob pump pyrite rock safety lamps sample screen shaft sheave short ton side silver sizes Sodium carbonate solution speed station steel stopes surface survey Table tape telescope temp tension tests timber tion tons Total towers track cable traction rope tramway Trans transit traverse underground usually valve vein vertical wire zinc