E/MJ : engineering and mining journal . elfare man, Mr. ;who is simply a bunch of enthusiasm in him faculty of imparting this enthusiasm to othi n this way largely responsible for our obtaining the results ?show for then. Discovery of tHe Miami MimeThe stoi of the discovery of the Miami has !with an increasing number of faiby, and irri •ions. The true avouched ell-known i The v-A iron-stained bills of what imi had been known for many years in tlanyonihow. was attracted leertv and ilater. Mr. Alsdorf mi him I Inspii Miami. in sh I 1058 ENGINEERING AND MINING JOURNAL pillllllllllllllllllllllllll
E/MJ : engineering and mining journal . elfare man, Mr. ;who is simply a bunch of enthusiasm in him faculty of imparting this enthusiasm to othi n this way largely responsible for our obtaining the results ?show for then. Discovery of tHe Miami MimeThe stoi of the discovery of the Miami has !with an increasing number of faiby, and irri •ions. The true avouched ell-known i The v-A iron-stained bills of what imi had been known for many years in tlanyonihow. was attracted leertv and ilater. Mr. Alsdorf mi him I Inspii Miami. in sh I 1058 ENGINEERING AND MINING JOURNAL pillllllllllllllllllllllllllllllllllllllllllllllllllllllllll I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIU Vol. 102. No. 25 111! acta amiamii • By CM. < lAMPBELL* The Granby company began shipping from its Phoenixmines in 1900. At that time the recovery was 31 and $ in gold and silver. In 1905 the ship-ments amounted to over 500,000 tons and the recoveryhad decreased to 24 lb. copper and $ in gold and. THE 75-FT. GRANBY MINK CAR silver. This reduction in grade and the necessity forfurther reduction in order to include additional materialin the reserves made a minimum mining cost the five-year period referred to the cost of ore onears was, therefore, brought down from $2 a ton to$ and since then has been as low as $ During this period the haulage system has been entirelyreconstructed. Electric motors running on a 3-ft. gagetrack with heavy rails and easy curves were tars with a 10-ton capacity seemed tobe the best at that time on the market, and this type wasintroduced. While a ureal improvement and very satis-factory when the ore was small, it was found that, as thebulk of the ore was coarse, the contents often had to beblasted out. of the cars. This caused loss of time, extracost for powder and labor and a heavy car-repair some time the possibility of an automatic side-dump-ing c
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
