Arizona weekly journal-miner., 1901-11-13
Definition of Mining Term.

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 Any work toward taking out the ore more than is necessary for the purpose of development constitutes what is called stoping. The cham bers from which the ore has been ex- cavated are called the stopes, and these necessarily vary in size and po- sition of the ore body.
 Drifting is the act of following along with the course of the vein. Definition of other mining terms are as follows:
 Adit-Open cut or tunnel on the vein.
 Alluvium Material transported and deposited by water.
 Amalgum-Gold or silver combined with mercury.
 Apex-The top or highest point of vein.
 Auastra-A crude mill for crush ing ore.
 Auriferous-Any rock or sand bear ing gold.
 Back-The roof of drift or other working.
 Bar diggings-Gold washing on river bars.
 Barren-Without mineral.
 Bedrock-Rock underlying placer mines. Blind lode-Where there appears no outcrop to a vein.
 Breast-The face of a tunnel or drift.
 Breccia-Angular rocks cemented together.
 Buch-A rich pocket of ore.
 Cap-rock-Rock overlying the ore or vein.
 Cage-An elevator used in hoisting ore.
 Claim-Area of ground located and worked under the mining laws. Cobbing-Breaking the ore for sorting. Contact-A junction of two kinds of rock, such as lime and porphyry.
 Contact vein-A vein between two dissimilar rock masses.
 Country rock-The rock on each side of vein Cord-A cord of ore weighs about eight tons.
 Cross s-cut-A level driven across the course of a vein.
 Acknowledgements work in the opening of mine.
 Dip-The slope or pitch of a vein.
 Face-End of drift or tunnel.
 Fault-The displacement of a stratum or vein.
 Feeder-A small vein entering into large one.
 Float-Loose ore or rock separated from the original formation.
 Footwall-Layer of rock immedi- ately beneath the vein.
 Fissure Vein-A crack in the earth's crust containing mineral.
 Free Gold-Gold free of other sub stances.
 Free Milling that separate readily from the gange by simple methods.
 Cash Vein-A vein wide at the top and closing at a short depth.
 Hanging Wall-The layer of a rock or wall overhanging a lode.
 Horse-A mass of rock betYeen the branches of vein.
 Hydraulicking - Washing down banks of earth with high pressure pipes of water.
 In Place-Not having been dis turbed from its original position.
 Level-A horizontal passage in a mine diverging from the shaft.
 Mill-run-A test of the value of a given quantity of ore.
 Nugget-A Any lump of native metal.
 Open Cut-An open surface work ing.
 Outcrop-The portion of a vein showing at the surface.
 Tanning Separating gold from gangue or gravel by washing in a pan.
 Prospecting Searching for min erals.
 Petering Giving out; failing.
 Pocket-A rich spot in a vein or de- posit.
 SaltlnS mlne-Tlaclng foreign ore in the crevices of a vein for the pur- pose of deceiving. Strike-The extension of lode in a horizontal direction.
 Stulls-A framework to support rubbish when stoping.
 Sump-A space in the bottom of shalf below the working level for collecting water.
 Vein-An aggregation of mineral matter in a rock Assure.
 Seam and stringer are used inter changibly for narrow branches run hing off from the vein or lead.
 Lode-A vein: thus lode claim is claim having in its boundaries vein. This term is sometimes used to designate the mine itself.