HANDBOOK OF THE METEORITE COLLECTIONS. 165 



meteoric irons, the surface becoming covered only with " an irregu- 

 lar net work of yellow metallic lines resembling troilite or schreiber- 

 site," and round each inclosure, large or small, may be seen-a linear 

 margin of the same material. This is shown somewhat indistinctly 

 on the polished surface on the inner part of the ring, and in the small 

 sample (No. 40) in the Shepard collection. 



Through misunderstandings a controversy arose as to whom was 

 entitled the credit of securing this unusually interesting relic for the 

 national collections. The matter seems to have been settled in Doctor 

 Irwin's favor in the jjublication mentioned below. 



References. — L. Fletcher, The meteoric iron of Tucson, Min. Mag., 

 vol. 9, 1890, p. 16. B. J. D. Irwin, History of the Great Tucson 

 Meteorite, etc., 1865 (privately printed). 



UBERABA, MINAS GERAES, BRAZIL. No. 363. 



Stone, Cka. Forty-gram fragment from a shower aggregating 

 some 30-40 kilograms Avhich fell on June 29, 1903. 



Reference. — E. Hussak, Ann. k. k. Naturhist. Hofmus., 1904. 



TJTRECHT, HOLLAND. No. 85. 



Stone, Cca or Cc. Weight, 28.7 grams, of which 25.9 grams are in 

 form of coarse powder. Fell June 2, 1843, at 8 p. m. Two stones fell ; 

 the first, weighing 7 kilograms, buried itself to a depth of 1 meter 

 (39 inches) in the earth. It was quite cold when removed a quarter 

 of an hour later. The second, weighing 2.7 kilograms, was not found 

 until three days later. The stone is described as clear gray, nearly 

 white with iron granules, and yellow and black, sometimes purple 

 red points. 



Analysis recalculated bj^ Baumhauer 5delded: Magnetic portion, 

 10.91; nonmagnetio, 89.09; specific gravity, 3.65. 



The magnetic portion consists of nickel-iron. The nonmagnetic 

 portion was calculated by Baumhauer to consists of pja-rhotite, 

 olivine, albite, and augite. A bulk analysis (recalculated) yielded: 



Per cent. 



Silica (SiOi) 39.30 



Alumina (AI2O3) 2.25 



Iron (Fe) 11.07 



Ferrous oxide (FeO) 15.29 



Lime (CaO) 1.48 



Magnesia (MgO) 24.37 



Soda (NasO) 1.39 



Potash (K2O) .15 



Chromic oxide and ferrous oxide (CroOa+FeO) .65 



Nickel (Ni) and cobalt (Co) 1.24 



Sulphur (S) 1.90 



Phosphorus (P) .005 



Copper (Cu) and tin (Sn) .025 



99. 120 



