Bisbee daily review., 1911-08-11

acting upon and altering the out CT cool sheil of the diorltie mass along the fractures and in the pipes of broken rock. There is a close analogy between the ore formation in the Veinlets and in the pipes The presence of abundant tourma- line and of intergrowths of quartz, woIframite. scheelite, and chalcopy- rite is confirmatory evidence and allies these deposits to the stock werck of tin ores on the one hand and to the disseminated copper ores at Morenci on the other This the ory, if correct, means that the deposits are primary and the ore may be expected to extend down ward to considerable depths with out any change in character. and with no greater change in richness than is found in the lateral eS. tent of any ore body
 Value of Ore.
 The ore developed aggregates l.. 650,oOo tons of PTS per cent cop per, much of which is already blocked out, ready for extraction. In this is included several large stopes of ore ranging from g to 15 per cent. All this ore can be worked at profit of S5 per ton by mixing the high and the low grade as was denon strate9 hv fha wafk E. thu psf Ta ores the mln is From the mines the ore comes to the stock bins; fed automatically as required, into a eonyeyor which delivers over a grizzly having 11-2 inch spaces. Un- second eonyeyor. where the over size is fed to a Blake crusher; the product along through the chutes to the second conyeyor, delivering the entire product to the sampler, whence it fall into the mill bins From here 1t is fed by plunger feed to the first set of crushing rolls, set 3-S inches apart. From the first set it is carried by belt and bucket elevator Co the tromnels on the screen floor. The first trommel has quarter inch punched plate; un. dersize passes to second trommel. oversize to second set of rolls, which are set to crush to 6 mesh The second trommel has a screen with I.34 milhmeter openings. Over size from this through a Richards pulsator jig, which makes the first concentrate, feed being under 1-4 and over 1-34 millimeters. Concen- trates to bin. Jig tails all de- livered to the third set of rolls, which crush to 12 mesh. Product of all rolls to belt and bucket ele- vator. Undersize from second from mel under 1-24 milimeters goes to 5-foot pulp thickening tanks; thick ened pulp to Richards pulsator clas- sifieT Overflow from thickener tank to two S-foot callow dewatering cones. Overflow water from these is clear and flows to wash water tanks for tables. Thickener pulp from tanks to Johnston vanners. The Richards pulsator classifier divides the pulp into 6 products which are delivered 10 Wilfrey and Card ta- bles Tables given concentrate To bin. The tails from No. and 2 WiIneys and middlings from the WilHeys go to Chilean mill. Tails Of third and fourth. Wildeys are clean, to waste. MiddIings of these tables are carried to duplex eallow screens (sG mesh), and the oversize of the screens is clean tails, to waste. The undersize go to Johnson vanners, these givins concentrate to bin and the tails to waste.
 Numerous extra men are being employed at this property, and it is the intention to begin operations at once. Shipments of highgrade ore have been going on for some time tO the Fl Paso smelter.