Bisbee daily review., 1904-07-07
Jn Particular witb Otber Jm. portant Jnformaticn from Per. $cnal Observation zee s~ see

! the grizzly and screen, also one-inch size join the product of the rolls. By ! the usual automatic U tripper the ore is delivered to any bin desired. Un- der the bins the ore is fed to launders, which carry it to an 1s-in bucket ele- vator; from the top of this it passes to double line of trommels. Over size of 5-S in. and 3-S in. trommeis goes to sand jig, overflow to No. 3 in. trommels Oyers.Ze of 3-16 in and 1-2mm. trommels goes to mid de jigs, undersize to coarse hydraulic classifiers. Feed of coarse classifiers goes to sand jis. overflow to No 8 elevator, joining crushed prosuct ot Chilean mill. Tailings of coarse jigs are crushed in 36 in. rolls and pass to No elevator, tailngs of middle jigs go through 27 in. rolls to elevator. tail ings from sand jigs through Chilean mill to No. elevator. No delivers material to 3-16 in. trommels, enabling the re-ground coarse and middle jig tailings to have opportunity To pass to the next finer jigs in the series UT if possible directly to the shaking tables and vanners None of the iigs make waste tailings, so the limiting screens will be the 2Q-mesh of the Chilean mills.
 There are 36 Wilfley tables and the same number of Fure vanners, as well as six tables for middlings. After hay ing been jigged, reground and sized to 20-mesh the fines remaining pass 10 the tables and vanners. The ta- bles handle granular feeds, the mid dlings and tailings being diverted into side launders. The concentrates go to bins, the middlings 10 SIX Wilfleys, al lowel level, for re-treatment; the slime passes through pumps to thick eners and on to yanners, and the tails go through an automatic sampler, then 10 the settling tanks and finally to waste dams in the gulch below the mill. This gulch cantains dams for impounding the tailings, in case it becomes desirable to retreat them. There are six pulp thickeners, each a round tank 10 fl. diameter and IS f. high, with hopper bottoms converging ca point in the center just below the pipe line. These are the types of thickeners developed by the DeL:oii Copper company at Morenci. Arizona, and were successfully used there be fore being adopted in other camps. Water from these tanks flows con stantly over the top, and is saved for reuse al the tables. The thickeneC or de-watered pulp is not classified. but goes direct to the vanners. Con centrates fall by gravity into bins above the railway tracks, and by gray fly again into the cars for the shelter.
 As already stated the question of ample water has been a serious one at all times, and is still so. though i'm mediate danger of an adequate sup ply has been overcome by the insta! lation of pumping plant al the wells of Ojo de Agur, nine miles Away in the desert, and al an elevation of 900 II. lower than the smelter and mills. Water is pumped to the smel;er and the surplus flows into a reservoir, from whence it is drawn off for all other purposes. But a large share of the mill water is secured al the site. and all that is possible is saye@ from the de-watering of concentrate. sand and slime. For his purpose special devices are in use. The wa.rr from coarse jigs is saved at the jis floor and used upon the middles, that from the middles upon the sand. ana then back to- coarse jiGs again. From Wilfleys the water is recovered in the thickeners, from tailings in settling tanks.
 The percentage of water recovered is s7.5; the recovery is as follows: