The weekly Arizona miner., 1873-09-06
Mines and Mining.

The Mining and Scientific Press recently devoted considerable space to description of Pauls automatic mill for working either gold or silver ores Mir. Almatin B. Paul, of San Francisco, has been laboring for six years to perfect his process, and has lately got it into practical operation. The object has been to crush ores dry, and to do as much as possible of the work by machinery. Tbe operation begins by loading hopper with quartz for the stamps. This hopper can be made of any | size, to hold pounds or tons. The stamps | when in motion operate on the automatic | feeder connected with the hopper, and the | battery is thus fed with more exactitude | than by hand. The battery reduces the ore coarsely, say to the fineness of number 30 | wire or 900 fine, thus enabling the battery to l do double the work ordinarily done in dry crushing. The crushed ore drops on an in cline plane and slides down an endless belt, which conveys it to the hopper of the pulver- i1ing barrel This barrel being self-feeding, the ore is at once delivered inside for further reduction. The reduced quartz from the bat
 tery is here triturated by larger pieces ot
 quartz, by the revolution of the barrel. The
 ore is here chemically treated and warmed | by electric heat. The barrel is so arranged
 as to be self discha7ging, and as fast as the ore
 becomes fine enough it passes out of the way. The pulverized ore passes into elevators which
 carry it into boppers where it is weighed by selfacting scales and stored till the smalga-
 tor is ready to use it. The position of the
 amagamating barrel is such, that by opening n valve, all the ore in the hopper at once de- livers itself into it, and without making any dust. Into this barrel goes the mercury and some more chemicals; it is then closed and set in motion. During these revolutions Mir
 Paul claims, "that the metals and mercury
 are in such electrical conditions. that the base ore is in antagonism with the mercury and cannot be amalgamated while the pre-
 cious metals are in harmony and become ab Q sorbed by it." From the amalgamating bar rel the ore passes into and through three :. settlers, and from the last over blankets whicl 7, are washed by machinery.
 Of the last mill erected at Springville, U T., Mir Coles Saunders, of Montana, who wis ', tied it, thus expresses himself in the Sal
 Lake Journal:
 1t is the best constructed automatic mil i' I ever saw, and does fully all that is claime' r, for it in the way of crushing ore. The anal ss gamating barrel and settlers work beautifully tb and four men in twenty-four hours can d |, the work of ten men in an ordinary mill" ,h The owners of the mill also pronounce it e- success and have ordered a duplicate; IL of higher recommendation could be given. Tn he Utah mill produced bullion 995- 1000 fine Tn ,s- benefit of system which produces almos nd pure gold and silver at so small an expense a ,d from that s to ss5 per ton of ore is beyon .t calculation. This system Mir Paul has style Ter the American Barrel Systemn as distir ve gushed from the " Freiburg Barrel System, ss. Another good feature connected with tn
 mill is that every single portion can be stop
 ped or started without interfering with tn
 working of any other portion. Notwith m standing the mill is so thoroughly automati av and cheap in working it is cheap in constru' nd tion and operation. It is to be hoped ths en Mir Paul's labors will be fully rewarded, for ne haa consumed much valuable tune to Sd we nothing of thousands of dollars, in exper ;s ments, during the years he has been engage .;. on the invention. But few individuals wou ,;. have prosecuted the work so consistently ,od he has and been so careful in their exper lot rnents.