PART II. 



DESCRIPTIVE CATALOGUE. 



A. MUSEUM COLLECTION. 



INTRODUCTORY SERIES. 



Series illustrative of three principal types of meteorites: 



Meteoric stone : Aerolite. Forest City, Iowa, Cat. No. 167. 



Meteoric stony-iron : Pallasite. Ilimae, Chile, South America, 

 Cat. No. 383. 



Meteoric iron: Siderite. Toluca, Mexico, Cat. No. 347. 

 Series illustrating mineral composition and structure: 



Graphite, out of Canon Diablo siderite. Cat. No. 476. 



Schreibersite, out of Canon Diablo siderite. Cat. No. 475. 



Diamonds, out of Canon Diablo siderite. Cat. No. 473. 



Nodule of amorphous carbon in Canon Diablo siderite. Cat. 

 No. 512. 



Troilite, in Toluca siderite, Cat. No. 347. 



One-half of nodule of troilite out of Canon Diablo siderite, 

 Cat. No. 514. 



Widmanstatten figures, cube of Casas Grandes siderite, No. 369. 



Neumann lines, Scottsville, Allen County, Kentucky, siderite, 

 No. 77. 



Chondrules, out of Allegan, Michigan, aerolite. Cat. No. 515. 



Crust, due to fusion by heat in passage through the atmos- 

 phere. Forest City, Iowa, Cat. No, 167. 



ABERT IRON. (Loality uncertain, probably Toluca, Mexico.) No. 16. 



Iron, Om. Section of mass weighing 150 grams. One face etched, 

 showing coarse Widmanstatten figures. The original mass, weighing 

 466 grams, was found without label in the collection of the late 

 Col. J. J. Abert. The structure and composition agree so completely 

 with the Toluca irons that it seems best to so consider it, at least pro- 

 visionally, rather than catalogue as an unknown as is usually done. 

 At the time Colonel Abert was making his collection the Toluca irons 

 were among the most common, and therefore most likely to find a 

 place in mineral collections where a representative native iron was 

 desired. 



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