Bisbee daily review., 1917-04-29

] Uldln Dy the pTONlSlO0S or trdllS d1u
 other transportation facilities. The
 mine has of course required a great
 deal of money in its development but
 it is paying back handsomely. Also
 it is probably doing a good deal for
 other possible pay area in the Super
 for district. Whether there are other
 Magmas there remains to be seen. but ! it is certain that the later findings of
 this property will have much bear ] ing upon contiguous ground. some of which has found high favor with en-
 gineers of good standing and upon
 which development work is now being
 prosecuted.
 Two of Oldest Districts.
 Cornelia and Magma are central in two of the oldest mining districts in i the Southwest. Magma was produc- | ing silver with profit nearly forty years ago. while Ajo shipped from | Cornelia more than sixty years ago the first copper ever sent out of Arizona | by white men on a commercial basis. | It went around the Horn to Swansea.
 Wales, and was there reduced. The | shipments, however. were short lived, | for the high grade did not hold out. ! Magma's career came to pause when | the price of silver fell. The Silver King. famous as producer of lead-sil- vre. went out of commission at the | same time. The properties were near neighbors and had much in common ] in features attending their develop ment and production. The area Of
 both were running into copper when they shut down. Copper did not have ! sufficient value at the time to make | it worthy of consideration at so re- mote a distance from rail and supply markets But when the search for copper properties became intense dozen years ago. the early day copper showings of Magma were remember ed, and investigation followed. The silver was mined at much less depth than they found the real copper val ues. The latter may readily go to far greater depth than yet attained. The district, indeed. may prove to be one of the deepest profitable mining in the world It has tendencies that way in its formation. So far, Magma alone has got down to the really great zone. Others have plans for depth. Silver King being included in this list. Their outcome may be largely dependent upon the mining intelligence. patience and financial resources available for the task. Some day. however, it is considered reasonable to believe that a considerable area will be added tO the present proven zone of the dis trict, and on some of this territory it may not be necessary to make as great depth in order to reach con- mercial bodies of ore as has been re- quired on Magma. However, to all of this outside territory there as yet at taches various questions which re- quire solving before anything definite may be claimed with assurance.
 CorneIia Is Ideal.
 Cornelia has come up from one of the greatest of the deserts trials up 
 very life of western miners to the status of the Southwest's ideal cop per mining property For more than sixty years, central in the Ajo dis trict, COrnelia wasted the money and the lives of prospectors and investors. Its rich streaks and pockets of high grade lured them on. only to lead into the snares of low grade of difficult character by reason of the problems it presented to the reduction plants. These things are now succeeded by development and mining plan which are one and embody every advantage that could be asked. These advant- ages on the mining end have of course not come about unassisted. but the great ore body has lent itself to the ingenuity and understanding applied by the Calumet & Arizona organiZa- tion which has the direction of the property, with the result that the ideal conditions for successful opera ton which now prevail were brought about. So complete has been the CO., operation. it may be cited. that it has been possible to plan the trackage for the ore pit and every step in re lation to its opening and mining from the surface to the estimated bottom al depth of 400 feet: in other words 10 diagram and chart the operations il will be most economical and eff cient to conduct over period of more than thirty years from the pres ent date
 Fine Example Of Specializing.
 In this work as in the gigantic task of plant construction which has just been finished. specialists attended every step. and specialists remain per manently on the job to carry out the required performances. They are yardage and tonnage record holders. record holders in point Of getting ef- ficiency out of steam shOvels and trackagc and from powder in breaking ground to best advantage for the ma chimes; they are laboratory and me chanical and costs specialists. In no department arc they lacking. but they are working tOgct'rJr as one, and n