Tombstone epitaph., 1899-01-15
COPPER MINING.
An Interesting Account bv an
 Ablc Authority.

| Qneep Go. furnishes the Mining & Engineering Journal with the follow ing ;nterestiDg notes on copper min ing in Ar.zona:-
 The statistical records show from Arizona notable kut steady increa-e fr some years psst, namely: 1893, 43,773.675; 1891, 44,53l,l JOS: 1895 4s. .329. .iO3; 1896. 73.745 32l; 1897, sl.- OIS,922; 1898, ll,lS3,l9 pounds.
 This growth in our cnpper in iustry will be msintaIled, and it's average increase probably exceed.d during 1899.
 Arizona's greater prominence, among the thres great producing dis- tricts Of tais country, IS due to the utilization in Der priuci2al mines during late years of sulpbide ores. to the treatment of oxidized ores they were limited, rot only by the com- paratively scsnty supply Of that slass oi ore., and their inevitable sxh.us- ,ion at no very dietaut date, bu. by reluctance to ireur tho waste of ] to ger cent. Of copper in the .lags, which loss seemed to be unavoidable under the most expert furnace mar ag-ment when making copper direct
  by ons fusion iu the cupo,a. The oxidizsd ores wSre most plentiful in the $ luthern groups of mines. where the ore occurs in limestone or associ- ated with lines'one. The United Verde deposits are lenticular masses in slate, ani. there Ore, atmospheric agencies, not having penetrated to great depth. the copper carbonates, though rich, were shallow, and Were exhausted early in the mines history. This company therefore has for years past relied exclu-ivsly ea altered or unsltered heavy sulphuIets, winch have been heap rsasted preparatory to mating.
 But in the Bisbes and Clifton groups there remain resources of o1i- dizsd ores sufhcient, by mixture win the sulphurets, to make . matte of B-ssemerizing grade for years to come. The carbonstes, however, even in these mines, exist in quantities GO much less than the eulphurets that the homogeneous are impslled by caution to restrain their operations within moderate bounds if they vou d postpone as long as possible the evil day when roasting must be resor'cd to. Nevertheless, greater freedom of . action was obtsined es Eeon as the , companies which control taese groups of mines decided to handle the sul- phurtt, that had been developed du-- ing the exploitation of the oxidized ores, and which have been since ex- posed.
 ) The resources in sulphurets aye, oi 3 course. far greater than tho visible , supply of cnrbonatos ever was. and, theirfors, the Copper Queen, the Arr zena Copper and the Detroit com panies have all felt emboldsned to ex- tend the scope of their mining and smel.ing. kll three have sdop'ed the the pneumatic method of conceD trst- ing n,a,tes. It Is one of tho a1vant- ages or disadvantages of this prCces. that a conv.rterto be run economical Iy must be fed up to its capsci ay, and ss this amounts to from 1000 900 to l ,JO0, GOO lbs. of copper per mouth, 7 any decided increase of plant o! t necessity involves a consider able leap . in production.
 . Another source of increase from the 3 southern mines during 1899 will he the copper bullion from ths two Globe companies. Both have been inactive of late, bending the arrival of ths 7 Globe, Gilx Valley $ Northern Rail- road. It has now reached its ter ' minus in the town O! Globe, and both companies will, therefore, during the coming year resume operations and add notably to Arizona's cum total. The largest product. however, Oi ! the United Verde. tho Globe Mines e and the Clifton companies will prob. ably represent an increase in Arizonas produc'ioa to the worlds supply oi over 30Oo0. .OVo Ibs. in 1899. Blu, there is no reaeon 10 apprehend this increase will be repeated in successive years.
 . How to Prevent Pneumonia.