Bisbee daily review., 1918-09-01

The Calumet & Arizona ore is vari- able in character, as are all the other ores of the Warren district In depth there is an abundance cf sulph:de ore,
 there are also large bodies of carbon ate and other oxidized ores, sometimes not conformable to the usual and sup -possdly logical position of oxidized
 ore above the sulphides; in places
 that order Is reversed at Warren and at Bisbee. This explanation will serve to accentuate the fact that deliveries of mixed high-copper ores of both classes are made to the shelter. The ratio between them is about 1 of OK ide-Ore to 25 of sulphide. The thing, however, that it does not reveal is the interesting fact that, in the develop ment of the large reserves of hieh- grade ore, that is. ore containing over per cent copper, a much greater ton mage of low-grade sulphide ore has been put into sight. For such ore there is an extremely limited market at pres ent, although its composition is favor able for the manufacture of sulphuric acid The sulphur content exceeds 45 per cent, and it assays about per cent in copper The Calumet & Ari- Zona shelter is one of the few West ern plants that has a sulphuric-acid annex This has a capacity of 200 tons of acid per day, and if it be essential for purposes of war to produce more of this commodity it is plain that it would be no extra overhead expense, and but little extra labOr-cost. It would be possible, under properly CO ordinated transportation systems to take acid from such a plant to Missis- sippi valley points. if not farther east, at least to the extent involving the duplication of the Calumet & Arizona works. With lead at moderate prices, this would seem to be a favorable mo- ment to undertake such a duplication if required as an emergency measure
 It is interesting to note that the plant now has a large battery of Herreshoft hoasters, if which nineteen are dis charging their sulphorous fume into the atmosphere, while only five are connected to the acid-making plant therefore no delay would be occasion. ed for the manufacture and erection of this part of the plant. Neither would it be necessary to draw upon the low-copper pyrite ore, which would still remain cheaply available for acid
 making in the east if the government can arrange for it's transportation. Toe much stress cannot be laid upon the fact that, while officials in Washing ton are calling for pyrite and more sulphur to make good the deficiency o
 Spanish pyrite, here are resources al most untouched. that need no more than suitable management of tho transportation of the country to be come available for the general good.
 The Douglas smelter of the Calu met and Arizona company lies about { half-mile north-northwest from thu Copper Queen shelter of the Phelps Dodge corporation. It represents ; completely rebuilt plant, new iron end to end, replacing the old work
 erected some years ago. The design ing was done by the Calumet & Ari zona staff under the immediate care O A. G. McGregor and c. H. Repath with the advice and assistance of l.. Ricketts, bringing his ripe experience
 to the problem as consulting engineer and under the energetic direction o the general manager, Captain, nov Lieutenant Colonel John Greenway, t
 whom each enterprise in the better ment and development of the plant
 of his company becomes a pet oi which he bestows an enthusiasm tha imparts inspiration to his associates