NO. 1508. NEW METEORITE FROM SELMA, ALABAMA— MERRILL. 61 



meteorites) polys^mthetic twinning and low (IS'^ to 20^) angles of 

 extinction. They are colorless or of a gray color and, but for the 

 inclined extinctions, distinguished with difficulty from the enstatite. 

 They occur in chondrules as well as in scattered isolated forms. No 

 feldspars nor minerals other than those noted were observed. 



The most striking feature of the stone is the broken and fragmental 

 condition of the chondrules and the variety of forms manifested. 

 It is best comparable, so far as the writer's experience goes, with 

 that of Tieschitz, Moravia, described by Tschermak.'' It belongs, 

 therefore, to Brezina\s class of kugel chondrites Cc. It will be known 

 as the Selma, Alabama, meteorite, and is the fourth stou}" meteorite 

 thus far reported from that State. 



Since the above was written the stone has been purchased by the 

 American Museum of Natural History, New York city. 



EXPLANATION OF PLATES. 



Plate VI. 



Three views, drawn from photographs. 



Plate VII. 



Fig. 1. Showing microstructure and fragmental nature of ohvine and enstatites. 

 The amount of dark interspace is exaggerated by the oxidization of the 

 ferruginous constituents. 



2. Chondrule of porphyritic olivines. 



3. Chondrule of cryptocrystalline enstatite. 



«Denkschrift d. math.-Natur. Classe d. kaiserlichen Akad. der Wissen., XXXIX. 

 1878. 



