Bisbee daily review., 1918-10-06

 the Searcy mine, 8 miles northwest of Pfeifier The Southern mine has made an output of 36,000 tons of high-srade ore-more than half the output of high-grade ore from the region. The mines that have produced mainly or entirely ferruginOus manganese ore are the Cason mine, miles northeast of Batesville; the Blue Ridge mine, 1h miles northeast of Cushman, and the Ball mine, 5 miles northeast F~elffer. Of these the Cason mine aas produced by far the greater part of the ferruginous manganese ore mln' Id in the region.
 The cre-bearing clays of the region that are now mined contain ore in ratios ranging from of clay to l of orc. to about 35 of clay tO of ore. eX- elusive of the oyerburden. The rec ords at the Ball mine show a ratio of Q to 1, and 4 to 1, and the records of the Montgomery mine show ratios of 3 to 1 and to 1, and an average of 3 to 1. Other deposits where wash ing has been done, as well as mum Der where no washing has been done, contain ores that will yield as much concentrate as those at the two mines iasl named, but at many mines and prospects the ratio of ore-bearing clay to concentrate is between 10 to and 70 to 1. In the mines where only the larger masses of ore are saved the ratio of ore-bearing clay to the ore recovered runs much lower and min ing is generally not profitable where it is lower than 35 to 1.
 The manganese has been derived from the Cason shale. in which 1t has been concentrated in the form of OK ides into deposits of mineable size by ordinary groundwater perhaps recent ly. Much of the ore has been con- centrated in shale itself, but most of it is now in the residual clays of the hmestones below the shale. The ore now in these claws was originally car ried downward in solution by ground water from the shale and deposited in the Fernvale limestone. As this lime stone has been carried away in solu- tion boulders and fine particles of ore have been freed, and as erosion in the region has preceded the ore has set tied by gravity or has been carried by streams down the hillslopes until much of it now rests upon limestones that are lower than the Fernvale.
 The high-grade manganese ores gen erally contain 45 to 52 per cent of manganese though some of the ore shipped contains as much as 60 per cent of manganese. Most of the ores contain from to 8 per cent of iron, 0.15 to 0.30 per cent of phosphorus, and to per cent of silica. Some of the ore shipped contains more than O.3O per cent of phosphorus and a very little contains 0.40 to 0.5O per cent of phosphorus. Phosphorus in excess of OPS per cent is usually considered harmful and a higher content will ma terialsy injure the market value of the ere. but the excess of phosphorOus. which may be due to the large content of phosphorous in the material asso- ciated with the ore, can largely be re- moved by properly preparing the ore for market
 Most of the ferruginous manganese ores contain 20 to 40 per cent of man. ganese, 8 to 20 per cent of iron and , 10 20 per cent of silica. The phOs- phoras content is about the same as that of the higher grade ores.
 Some mines ship two or even three different grades of ore, which are sep arated by hand picking. The highest or first grade ore at some of the mines is hard and compact and contains 50 per cent or more of manganese; the ! second grade is porous. light and soft | though firm and contains 30 to 35 per cent of manganese; and the low