Arizona republican., 1909-02-25

museum at Washington as the Irwin Ainsa meteorite, is known throughout the science world for its remarkable ring-like form and its history. Found originally near the mouth of the Madeira canyon in the Santa Rita range of mountains some twenty-five miles south of Tucson, it was taken to that city and for many years served as an anvil for the local smith, the thinnest part being buried in the earth and the broadest, heaviest part corresponding to the signet portion of ring, having a nearly flat surface, served as the face of the anvil. Res cued from this position by the joint efforts of MT. Ainsa and Dr. B. J. D. Irwin, U. s. A, it was taken to Guya- mas by a quartermaster's team, ship ped from there to San Francisco and thence to Panama and New York, and by rail to the national museum in Washington, where 1t now rests. A fac -simile in the form of colored plaster cast is now in the terTitorial museum at the university, Tucson. The iron weighs 1.400 pounds. It was exhibited in the United States collec- ton of minerals at Philadelphia in 1876 and is noted throughout the world.
 The region of Canyon Diablo, Co., conino county, is remarkable one for the number and aggregate weight of siderites found there and distrib- uted to the museums of the world. The wide, circular depression known as the Crater" is believed by some to have been caused by the impact of an enormous meteor striking the earth at that place, and bursting into fragments
 Nearly all the masses found there contain nodular masses of Troilite, and small diamonds have been found in some of the masses which have been analysed.
 A compact, rounded meteoric iron was found some decades since on Weaver mountain, near Weaver, fa- vapai county. and is known as the Weaver Meteorite." It was secured for the University of Arizona and now rests in its museum It is re- markable for its density and evenness of grain. Weight originally S5 pounds. Specific gravity e 7.sS1s. Analy- sis by w. B. Alexander in 1904 re- suited as follows:
 Iron .............. I9.6O Nickel ................... lSSO Cobalt ..................... l.oO
 Another meteoric mass. chiefly stone. with inclusions of iron. is from Snyders mountain, west Of Tucson, but is not yet described.
 rT%t-- o4n fT national museum Is from Arizona.
 JARosITE.
 A hydrous sulphate Of ferrie iron. Sulphur trioxide 31.s, iron sesqui-ox- ide 47.9, potash 94. water 10.S. At the Vulture gold mine, Maricopa county, on quartz.
 KAOLIN.
 Porcelain elay-Silicate of alumina; composition variable, but theoretical Iy; silica 46.5. aiumina S9.5. water IA. occurs at nearly all the large cop per mines as a result or the altera- tion of the feldspar in crystalline rocks, granite or porphyry, by acid solutions derived from oxidizing sul- phides. It is especially notable at the Copper Queen, at the Longfellow and other mines of Clifton -Morenci, at Globe, and also at the Vekol mines 1 in the southwest corner of Pinal l county.
 At the copper deposits of the Long fellow and at Morenci and Metcalf At the Mammoth mine in Garfield canyon and at the Copper Mountain mine.
 LIBETHENITE.
 Hydrous basic phosphate of copper Phosphoric acid 29.s, cupric oxide 66-4 water 3.S.
 This rare mineral was found by Messrs. Lindgren and Hillebrand | thirty feet below the adit level of the | Coronado lode in the main chute, ir small crystals less than a millimetel in length, deposited in cavities and seams in a quarzite gangue.