ARRANGEMENT OF THE COLLECTION. 



The collection of meteorites occupies Hall 62 of the West Annex 

 of the Museum. The number and disposition of the cases in the 

 hall is shown by the accompanying plan. The smaller specimens 

 are arranged in the chronological order of their fall or find, in Cases 

 1-4 inclusive. 



They are grouped for convenience, as shown in the Catalogue, 

 into the three classes of derosiderites, (meteoric irons) derosidcrolites^ 

 (meteoric iron-stones) and aerolites (meteoric stones.) The aerosid- 

 erites occupy Cases 1 and 2, the aerosiderolites part of Case 3, and 

 the aerolites, the remainder of Case 3 and Case 4. 



The place of fall or find of each specimen, usually constituting 

 the name of the meteorite, the date of fall or find and the weight 

 of each specimen are shown by its label. 



Cases 5 and 6 contain specimens weighing respectively 466 and 

 345 pounds, of the Kiowa County, Kansas, fall, together with smaller 

 individuals and sections of others of the same fall. In Case 8 are 

 placed a large mass and several hundred smaller fragments of the 

 Phillips County, Kansas, meteorite, the aggregate weight of which 

 is 1184^ pounds. 



On the pedestal numbered 12, in the center of the hall, are sup- 

 ported two large masses weighing respectively 1013 and 265 pounds, 

 of the Canon Diablo, Arizona, meteorite. See Plate III, Fig. 3. 



The total number of falls or finds represented by these specimens 

 is 180 and their aggregate weight 4,720.6 pounds, (2, 140.4 kilograms). 



Cases 7 and 10 are devoted to casts which show the form and 

 size of some of the more notable meteorites, together with speci- 

 mens of pseudo-meteorites, of the Ovifak iron and of other terrestrial 

 minerals which approximate in composition to those of meteoric 

 origin. 



Pedestals 9 and 1 1 bear full-sized models of the Chupaderos and 

 San Gregorio, Mexico, meteorites, which illustrate the size of these, 

 the largest known bodies of their class. - 



