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Show WESTERN MINING GAZETTEER. C HUSHING AND PULVEKI8ING MINERALS. mineial An improved machine for crushing and pulverising Jorto any decree of fineness lias been invented by Jlessrs. 1 London. wo dan, of Aliulaidc Chambers, Grnceohurch street, or horicastings bolted together bv by flanges on a vertical chamzontal centre line form a shallow cylindrical crushing the ber. These castings carry long bearings on either side of enflat faces, in which run two shafts in the same axis, nut which meet end to t,iu tirely independent of each other, and On the inside mid of in the centre of the crushing chamber. or steel Ians, or beaters these shafts are keyed two cast-iro- n with a suitable number of arms Avliich revolve nearly in contact with each other and with the sides a ml peripheiy of the chamber. The blades or amis of these fans are so adjusted e as to cause their faces to make an angle of about forty-fivfan haing decrees, with the axis of the shaft, the arms in one hoiizontal their faces parallel with those on the other in the two driving plane. On the outer ends of the shafts are keyeil a feed is placed hoppulleys. Above the crushing chamber and to these a per in which are fitted two breaking orjaws, movement is transmitted by eccentrics other similar means from the fan shafts or a counter shaft to partially break and The amount regulate the feed of the material to be crushed. of movement and the distance between these jaws may be regulated to suit the material to be operated upon. somewhat The action of the machine would appear to be similar to a Carrs disintegrator. The two fans or beaters are revolved in opposite directions, by means ot driving belts on the pulleys, keyed thereto; the speed may be from 1,000 to var1,500 revolutions per minute, or even more, but may be 1 he ied according to the degree of pulverisation required. material is fed into the hopper above the crushing cylinder, where it is first reduced by the crushing jaws to a uniform size, and is thence delivered at a uniform rate upon the revolving beaters from the upper and extreme portion of the periphery. The material thus falls in its crudest and largest form upon the extreme circumference of the rapidly revolving beaters that is, at the points of highest velocity, and, therefore, of thus greatest impact. These inclined faces of the beaters beatstrike the falling material against the faces of adjacent ers on the opposite revolving fan. This operation is repeated in rapid succession whilst the material is falling through the crusher, and until it is reduced This resulting product collects to a sulficiently fine powder. in the bottom of the cylindrical chamber, from whence it passes outwards through a suitable opening, which may be fitted with a grating or not. It will be seen that the angle given to the arms or beaters of the finis ensures that the material is reciprocated backwards and forwards by alternate blows between them, and that the velocity given to these arms will determine the fineness to which the material is reduced. London J Lining Jon nod. THE MINES OF SONORA, MEXICO. A reporter of the Arizona Citizen interviews J. 11. Ma-grud- er, of Sonora, Mexico, with the following result : The Coson mines are located at a point 08 miles west of Altar, and 45 miles from Port Salinas, on the Gulf of California. They consist of three gold mines, known as the Espuma, La Bonita and San Francisco, and were purchased by Mr. Magruilcr in the summer of 1870 for $80,000. He immediately set to work to develop the property, and not long since purmill. It is fitted with pans and setchased a new tlers, this method being preferable to the ordinary gold amalthe San Francisco mine carries a very gamating process, as rock. The mill will cost in k of silver-bearin- g rich the neighborhood of $40,000 when completed, the Mexican authorities having put Mr. Magruder to considerable trouble by compelling him to unload the schooner at Guaymas, for the convenience of the custom house officers, and the duties proved no slight addition to the expense bill. It is the intenThe mines lie in diftion to have it running by November. ferent directions from the mill site, each being about six miles vein of free gold quartz that away. The Espuma has a vein, but the averages $50 per ton. La Bonita has a rock is lower grade, and will not mill higher, it is believed, than $25. The San Francisco is of an entire different forma-rioe vein of gold quartz. The having a k of antimonial ledge, however, has a rich which averages very high. The mill l, silver next the will be run for some time on rock from the two former mines, though the work of development on the San Francisco will be continued. The ore can he worked for $8.50. 10-sta- mp pav-strea- 4-fo- ot 7-fo- ot n, low-grad- 12-fo- ot 2J-fo- ot pay-strea- foot-wal- NEW SOUTH WALES MINERAL RESOURCES. Shelbourne to the London Iron A letter from Trade Exchange , touching the mineral resources of the above named British colony, supplies the following details with respect to silver, lead and copper. The approximate area of the deposits of silver and lead ores is estimated at 500 square miles. Native silver has never mon with Nevada and Utah, in the way of mines already opened, and a class of men already skilled in the practical den richness and tails of mining, in addition to the variety of mineral deposits, the promise is now most excellent for an immensely increased product of gold during the next year. We believe that the new life and vigor which now fills every branch of this industry, in view of the new discoveries and the magnificent scale of operations, will be permanent and abiding. There is no reason why these great mining which States should not hold the supremacy and they have gained as the chief producers of gold and been discovered, but considerable doposits of sulphide of silver occurring with iron pyrites in quartz and in limestone, have been discovered on the Clarence and Manning rivers, The sulphide is usually more or and in many other places. less associated with galena, and is therefore, properly speaking argentiferous galena. Various forms of lead have been discovered and identified, including native red lead, carbonate, sulphate, phosphate, arsenite, molybrate, and sulphide. Large discoveries of silver ore have been lately made at Boorook, in the Tenksfield District, and it is probable that these deposits will eventually be worked on a large scale, but at present neither the silver or lead mines of New South Wales are receiving much attention The other metals, such as gold, tin, and copper, can be more profitably worked, and the depressed state of the market for both silver and lead diverts attention from them to other metals. It is doubtful if the silver and lead mines of New South Wales, at present known, could ever compete with the California Ehlorados of argentiferous metal. Richer deposits, however, may yet be discovered, but the present known silver and lead fields of New South Wales will never minister largely to the European demand for these metals. The aggregate product of silver for the ten years ending with IS 8, has not exceeded $000,000, the average annual yield of the last eight years not having been more than $05,-44The aggregate lead product was very small, that of the copper exported from the colony was about $11,085,000, the product of 1878 being $1,725,000. maThe Plumas (Cal.) Xational speaks of a chine at work on Spanish Peak, which sinks the shaft at the rate of from 25 to 30 feet per day. An arrangement has been made with the New York stockholders of the Hillside (Nev.) M. & M. Co., the inwhereby debtedness ot that company will be liquidated and the corporation placed upon a sound financial basis. THE PACIFIC SLOPF. Under this caption the Chicago Mining llerieirm speaking of the revival of the mining interests, savs: With the important advantage that California holds in com- well-prove- pre-eminen- ce 0. silver. shaft-borin- g |