Arizona republican., 1914-02-15

this ore carried between and 3 per cent uranium oxide. as it appears that no ore carrying less than ? per cent can at present prices bear the cost of transportation.
 This means that S.S grams of rad inn chloride. or an equivalent Of HAS grams of radium bromide, will Dc obtained from the ore shipped from this country in 1912. Only one American company has been prepar- ing radum salts of a high degree Of radio activity and its product has only recently been offered for sale. The American ores exported were purchased for their radium content. It is improbable that all of the ores exported are now represented by fin ished product, but the 1912 produc- tion of radium from American ores cannot have been much less than the quantity mentioned, for uranium was being shipped abroad in almost equal quantities in 1911 and is still being sold for future manufacture. II can probably be definitely stated
 
 American ores nearly two and one half times as much radium as from all other sources combined.
 Although no one can predict with certainty the value Of radium. or it's possible application to science or medicine, the subject is certainly well worthy of investigation by our high est scientific authorities, and under proper technical control it opens to American industry profitable field for exploitation.
 Although at $90 per milligram for radium chloride. the total value of 1 the radium shipped in 1912 amounts only to s792000 and the mining and | separation of the ore can accordingly | be considered only as one of our ! smaller industries. the fact should be noted that of this amount approXi mately $T10.000 went into foreign | hands and opened to foreign medi- cine and science opportunities in this most promising field that have been denied to our own people except by ] repurchasing the manufactured rad 1 ium compounds at an almost pro- 1 hibitive price.
 I France, Austria. England and ! Germany have their radium institutes | fostered by their governments or by | lhilanthropic foundations. Up to the | rresent time, although the United States has been furnishing a large part of the material for these for l cign investigations, comparatively l little has been done in the hospitals and laboratories of this country. | Up to the present time the car
 notite deposits of Colorado and Utah have excited little interest outside of 1 those two states. although they are the most important in uranium
 bearing deposits known in the world The majority of the deposits are ! exposed in the gulleys that traverse
 the reefs. The carnotite- is always
 in rather coarse sandstone over laid with fine conglomerate. Much pet flied wood is exposed, also bones
 and other fossils-as at Meeker, the | oarnotite stains are conspicuous | about the wood, much of which is heavily impregnated.
 T.. 1 ia or near the wood or in cracks ir the sandstone. although both the
 sandstone and the darker ores are
 lightly impregnated in many places 1 They may be divided into four gen.
 eral types-the yellow carnotite
 found mainly in cracks. dark
 brown siliceous ore impregnatec with carnOtite: d black ore much of which is associated with carbonace-
 ous material and some of whicr 1 carries stains of carnotite: and q
 grayish brown laminated sandy shalt rich in vanadium and carrying some Uranium
 Many samples that show little or Inc carnotite tuin yellow on exposure
 to the air for several weeks. This Hellowing takes place quickly if tn. ore is heated. as by laying it on the fop of q stove. Such a test ire
 duently shows uranium in ores not
 suspected of containing it, and d.
 the test is well adapted to fielt
 work, it merits wider use
 l "Fortyfive miles south of Greer
 rlser is Table mountain. where ar,
 deposits of red calcium vanadite anC
 'carnotite in beds of sandstone sev.
 cial feet thick carrying both uranium
 and -vana dium. Lumps of asphaltit
 material containing uranium ant vanadium are frequently found
 The carnotite deposits in San Mi
 euel and Montrose counties. Colo |