496 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



Brezina 2 classed the meteorite with the Trenton group of the octahedrites with medium 

 lamellae. The group characters are: 



Lamellse straight, swollen, little grouped, with oriented sheen, neither hatched nor spotted. Fields abundant, 

 combs likewise; plessite not much darker than kamacite. 



Meunier 3 classed the meteorite as Burlingtonite. He states that even upon the small 

 specimen of the collection acids show the tsenite and braunite very neatly. 



The whereabouts of the large mass of the meteorite do not seem to be known. Wulfing 4 

 records the distribution of only 49 grams. 



BIBLIOGRAPHY. 



1. 1864: SMITH. A new meteoric iron from Wayne County, Ohio. 



Amer. Journ. Sci., 2d ser., vol. 38, pp. 385-386 (analysis). 



2. 1885: BREZINA. Wiener Sammlung, pp. 211 and 234. 



3. 1893: MEUNIER. Revision des fers meteoriques, p. 50. 



4. 1897: WULFING. Die Meteoriten in Sammlungen, p. 389. 



Wyoming. See Silver Crown. 

 Xiquipilco. See Toluca. 



YANHUITLAN. 



State of Oaxaca, Mexico. 



Here also Oaxaca, Misteca in part, Goldbach's iron, and Teposcolula. 



Latitude 17 40" N., longitude 97 (X W. 



Iron. Fine octahedrite (Of) of Brezina. 



Known 1804; described 1863. 



Weight, 421 kgs. (926 Ibs.). 



As stated under Misteca, this mass has been much confused with it. Fletcher 8 decided 

 that the two belonged to one fall. Owing, however, to differences in structure and composition, 

 Brezina 10 separated the two, and his conclusion is generally concurred in. 



The account of Yanhuitlan, given in 1840, 2 states that the mass was found by some 

 Indian laborers while tilling the ground at the foot of a hill, called in the Mistec language 

 Deque- Yucunino. The laborers transported the mass to the town, and it was used as an anvil 

 for some years. In 1825 A. F. Morney, an Englishman, saw the mass and had a piece cut off, 

 which he analyzed and found to contain iron, nickel, and silica. In 1864 it was removed to 

 the City of Mexico, where it remains in large part in the National Museum, according to 

 Castillo. 3 



According to the description of Rio de la Loza, 3 the shape of the mass is that of an irregu- 

 lar tetrahedron, or an inclined pyramid with three-sided base. Dimensions, 1 .20 meters high 

 and 0.65 meter thick. 



Castillo 3 described the mass as of irregular shape, similar to a steep pyramid 0.65 meter 

 high, four faces of which are large and uneven, two small and flat, and the edges of the pyra- 

 mid irregularly truncated. The irregularities of the surface show different forms, some being 

 pyramidal and some round or forming great hollows. 



Rio de la Loza gives the following analysis: 



Fe 96. 58 



Ni 1.83 



Loss on ignition 36 



Calcareous earth 60 



Clay 61 



Siliceous earth, carbon, etc 02 



100.00 

 Specific gravity, 7.82. 



Rammelsberg 6 gives a partial analysis in which the nickel is reported as 6.21 per cent and 

 the cobalt 0.27 per cent. 



