Arizona weekly enterprise., 1888-03-17


 gallons. There were fifteen and a half days during the year when rains pro-
 vided enough water at our mountain springs to suspend pumping. One hun
 dred and eighty-nine cords of wood were consumed, and there are one hundred
 and thirty-six cords on hand to begin the
 year with.
 The following improvements were in-
 stituted at the mills at Pinal. A strong
 timber dam was constructed across
 Queen Creek about POO yards below
 Mill No. 2, to retain the water that flows
 to waste from the mills, al ''w 1t to settle,
 and pump it back to be agxln used. It is
 provided with flush gates, through which
 the accumulation of tsilings may be dis
 charged. A timbered well was sunk
 through the creek gravel at a point about
 three hundred and fifty yards below the
 mills, with proper protection at the top
 or collar from damage by freshets, and d
 considerable wator supply is obtained
 from thls source through the filtration in
 the sand and gravel above. The well is
 located just above a rock reef that comes
 nearly to the surface forming submerg-
 ed dam, and Is in the deepest depression
 of the creek bottom. The water from
 the timber dam and well IS pumped to
 the tanks at the mllls, and gives us
 further increased supply over former
 years. A new 10'x6'x10" Gordon and
 Maxwell duplex plunge pump has heen
 added to handle the natural water flow of
 Queen Creek. The first few months'
 work on the 250 level of the mine, gave
 such highly satisfactory results from the
 treatment of the ore, and the indications
 in the mine for 8 large and profitable ore
 body ill the upper levels were so very
 favorable, that during the late spring ten
 stamps were added to Mill No 2 (making
 twenty stamps in alD, the docile charac-
 ter of the ore under the roast chlorina-
 tion and amalgamation treatment re- quiring no additional furnaces, pans or settlers, and sufficient power being at
 our disposal.
 The total amount of ore treated dur
 ing the year at Mill No. by wet crush
 ing and eoncen tration, was 269012 tons, the year opening with 446 tons as re-
 serve on the mill yard. The average
 value of the ore was 21.08 ozs. silver per ton. The first product consisted of hfty-one shipments of high grade con , ceutrations averaging II. 335 tons each, or an aggregate of 577.813 tons. The average value of the concentrations was l 834. 135 ozs. silver per ton, and they con tain ed also an average of 31 per cent ) of lead. The concentrations produced constituted ?. 10 per cent of the material crushed, and of the total silver contents B. 90 per cent, was ill the form of native 3 silver, and 46.05 per cent, as comLined
 silver in the several argentiferuus sul- lOI,, f $ 10. 5l per cent. i'll the native silver con 7 tained, over that of last year. The ac- 3 tual average working loss from the first g treatment was 40 ozs, silver per l ton Beverage tailing assay being 4 Il ozs) 6 The tailings, being by weight the differ g ence between the quantity of ore crushed = i'll the mill and that extracted as first 8 class or high grade concentrations. in 6 amount 26, ,403. 9S tons, flow by gravity e to the six secondary set of six-foot Frue f vanners, where they undergo secold e treatment of concentration. The years 6 production from thi. treatment consisted t of 1261. 55 tons of second class or low e grade concentrations, of all average value Y Of 31.77 ozs. silver per ton or a total : value of of 40090. 43 uzs. silver, whicl r exists ill a combined form in argentif h erous zinc blende and Salena, the former c mineral largely predominatihg
 The silver contained in the tailings ol waste material from the operation, rep
 resents the loss in the entire mill treat o ment. The difference between the tota V value of the original ore fed into the
 mill. and the value of the sum of tho
 two products as concentrations, show.
 an actual working loss of .73 ozs. silver n per ton of the original ore, or 8.20 pel
 cent of its average value per ton. ThC second class concentrations are drie q 0 and sent to Mill No. ? for further treat ment. There are now on hand 210 tons .= Mill No. has been Ill operation pretty continuously throughout the year, treat n ing first class ore (from the 250 level) ft second class concentrations (from Mill ,e No. H. and white ''tailings" Crom tn, 'e heaps of several thousand tons set asid $ for future treatment several years ago) D. At the beginning of the year there wer
 416 tons of the nrst-class ore on the mil le yard. From Jan. 1st to October Is l. there were treated 484O O4 tons of first g class ore, having and average value 0 ir g. .47 ounces of silver per ton, roasted m pulp. For the hrst five months the or hdS Ol HE II SIdetS. Nltl HE t, percentage of native silver as shown b E the chlorination assays, which gave a a average of 66. 60 per cent chlorination e, The time required for satisfactor s, roast chlorination was eight hours on a charge of three tons, with consunptio a of 2b to 3 per cent of salt. Successfu ct pan treatment required but from two t. K two and a half hours. In June and Jul in the grade of the ore fell to a low averag a value, due to breaking into the dike
 like formation on the 250 level in tn us mine before its character was establish le ed During August and September, tn UT work of upraising through the dix y, and exploring the new ore ground abov ss 1t, brought to the mill 8 mixture of n On proved average grade, some of it comin nd from the cleaning up of the old ground ht and some of it from the new With thi IL material an average chlorination assay or 86. 20 per cent. was obtained showing
 decrease in the proportion of native si ne yer, and four hours roast with from at to Il per cent of salt. and one and fit half to two hours pan time, resulted ill st. very clean extraction of silver. Whi H. there was change in the form in wnic ,w tue silver existed in the ore, or rather it, the proportions, it also became very cl
 priferous, and the greater portion of u fly bullion produced during the last for