Mohave County miner and our mineral wealth., 1921-07-15
Increased Efficiency
 For The C. o. D.
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 equipment is being installed without hampering in any way the working of the mill as originally constructed and will probably be in commission by the middle of August. It includes three Wiley tables, oil-flotation units, Dorr thickeners and dryers.
 The c. O. D. mine is one of the old-time bonanzas of Mohave county. Owing to the presence of base metals in the ore, however, which offered puzzling and costly reduction prob- lems, the property had been idle for a considerable period at the time it was taken over by the Dudley interests about eighteen months ago. After comprehensive laboratory experiments and tests, extending over a protracted period, MT. Dudley's engineers worked out treatment process for the c. O. D. ore. A 10O-ton ore-reduction plant was then erected. After sixty days of successful operation the plant thoroughly demonstrates that the process in use is not an experiment but an achievements fact accom- plished. d..
 Mining interest in the new camp of Katherine in Union Pass is accentuat- ed by the possibility of the early dis covery of ore in place in the Kath- ,erine Extension and Gold Chain work ings, and by the discoveries of high grade ore which have of late featured the development of the mammoth Katherine Assure in the bonanza Katherine mine. Neurological con ditions in the bottom of the Katherine Extension shaft indicate that the crosscut on the 250-foot level will be- fore long enter milling grade ore in the northeast continuation of the Katherine Assure, while in the Gold Chain shaft the conditions are fully as favorable for the tapping of mill ing grade ore in cross-vein which appears to be interrupted by the Kath- erine Assure. It is therefore prob able that the miners working in both of these properties will be crosscut- ting and driving in pay ore within sixty days. ..
 Recent estimates place the value of the ore in sight in the Katherine mine at $5,O00,000. This figure includes the blocked out tonnage on the first, second and third levels, the high grade ore body recently opened west of the shaft on the second level, and the ore that is being blocked out on the 40o- foot level. From top to bottom the mine is in milling grade ore of a gen eral average value of $12.50 gold a ton, intersperced with wide lenzes that carry a gold content as high as $500 a ton. The pressing need at the Kath- erine mine is not ore but ore-reduc- tion facilities, and the latter are, it is understood, soon to be supplied.
 Following closely the, resumption of milling operations at the Dean mine in the Wallapai range comes the an nouncement of the discovery of a new shoot of very rich silver,gcld ore in an upraise from the lower level: Break of the raise the ore carries 80 ounces silve rand $16 gold ton, with the in dications favorable for the continua- tion of the shoot to surface, a distance of approximately 200 feet. The re- constructed mill is supplied with oil-.' Notation units and is handling 50 tons, of ore day. w. w. Elliott, mill sup erintendent, expests to have the plant working at 60 tons daily capacity within short time. '"
 Announcement is made that the Sil- yer Trails mines company, owner of the Diamond Joe mine in the Walla- pal range, has purchased the milling plant formerly operated under lease, and that it is at once to be remodeled and enlarged to meet the ore-reduc- tion requirements of the Diamond Joe mine. The remodeling plans include the construction of an aerial tram from the mine to the mill. A gen. erous tonnage of oxidized and sulphide ere stands in the underground work ings awaiting reduction. In the up- per levels the ore is almost entirely silver-bearing, but in the sulphide area carries a gold content of $8 ton in addition to average silver values of $20 a ton.
 MINER WANT ADDS. BRING