Arizona republican., 1909-02-25

A choice series of beautiful speci- mems from the Copper Queen was presented to the School of Mines by Dr. Douglas and they may be seen at the university.
 MANGANESE ORE. The various oxides of manganese occur widely distributed in small quantities. generally as the result of oxidation of manganiferous vein stones, notably from managnese-sp spar, as at the veins traversing diorite at the Salero. Santa Cruz county The occurrence at the Lucky Cuss mine, Tombstone. appears to be pri- marily from Alabandite (which see). Samples of hard compact ore con- l tributed to the representation at St. Louis in 1863 by MT. Barker of Flor ence were reported as from two par allel veins averaging twelve inches in width of solid ore and extending for about 600 feet in a mica schist | formation.
 MARBLE.
 See building materials-Appendix. MELANOCHAlCITE. A silico carbonate of copper. A stance described by Koenig as form ing a thin envelope about kernels of cuprite in the midst of chrysocolla. Found on the S50-foot level of the Calumet and Arizona mine. Bisbee.
 MELANTERITE.
 Iron ,vitriol. Hydrous rerrous-iron sulphate; sulphur trioxide 2S.s; iron protoxide 25.9; water 45.3- | Occurs in the United Verde mine. Jerome, with copper sulphate (chal- canthite).
 In tho teachings from Red Noun tain, a few miles below Patagonia, | Santa Cruz county. It is found usually wherever iron pyrites is oxidizing and on exposure to the air it changes to ferric sul- phate. It is the partial source of the hematite gossans of experiencing lodes.
 MELANocHALcITE.
 A siIico- carbonate of copper. Cop per oxide 76.SS. silica 7.S0, carbon di- oxide TIT. water I'll. Described by Prof. G. A. Koenig (Am Jour Sci.. Dec, 19O2)
 From the S50-foot level of the Cal umet and Arizona mine, in thin shells about nuclei of cuprite. native copper and brochantite.
 MIRABILITE-GLAU SALT.
 Hydrous sodium ulphate. Sulphur trioxide PAS, soda 19.3, water 55.9.
 Occurs abundantly in beds and rounded hills in the valley of the Verde river Yavapai county, some three miles southwest of Camp Verde. with thehardite, halite and glauber- ite. Exposed surfaces soon become covered with a white effloresence which drifts before the wind like dry snow.
 It is quarried extensively to obtain ssalt" for cattle ranges. More or less rock k-salt is found enveloped in It.
 MoLYBDENITE
 SuIphuret of molybdenum, sulphur 400. molybdenum 50.
 Valuable as a source of the metal or it's salts and for the treatment Of steel.
 It occurs at several different places in the Santa Rita mountains, notably at McCleary's claims, in a quartz eangue and also in close association with pyrites, from which it is not readily separable. In the quartz vein. however, 1t occurs in sub-crystalline masses from which it is easily and completely separable by the oil or resin processes. Greasy or resinous compounds adhere to the molybdenite but not to the vitreous quartz, thus permitting a complete separation.
 The chief source of molybdenum in Arizona is from the compound of molybdic acid and lead the species wulfenite. (Which see).
 Molybdenite occurs also in quartz near Columbia, Samples from Braden Ft. Thomas, 1sO3). Reported also from Berkeley in Cedar district. At the : Amethyst claim CWalker's), Dragoon with fluor spar and hubnerite.
 Large deposits of molybdenite 1T granular form, not foliated, are re- ported in Mohave county, in the Hualapai range, across the valley from the Aquarius (Smith).
 MoLYBDITE.
 MoIybdie oeher-MoIybdenum triox' ide; oxygen 33.3, molybdenum 66.T. Accompanies the ore of molybdenit' and results from the oxidation of th' sulphide. at McCleary's mines in thu Santa Rita mountains.
 MORENClfE.
 Under this name Messrs. Lindgrel and Hillebrand describe a mineral O complex composition which, under tn microscope, appeared we'll individual ized and not mere mixture It oc I CUTS in a lime shale on the intermedi ate level of the Arizona Central min s at Morenci, 200 feet below the surface in brown, yellow. silky. fibrous seam in brownish, or greenish, spreadln ,, masses.
 o The fibrous mineral on the seam e forms a felted aggregate as see = under the microscope. It appears . be a hydration product of an origins y meta silicate.
 MUSCOVlTE.
 Mica. Muscovy glass. l. From tbe north side of the Gran e Canyon of Arizona, Coconino count. 1T in sheets of two and one-half Af fOfT