OF ARTS AND SCIENCES. 



61 



Date of Fall or Find. 



No. 



Found 1839. 



141 



Fell 1839. 



Feb. 13, 3i p. m. 



Described 1840. 



142 



143 



Weight 



in 

 Grams. 



2,112 



173 



3.5 



15 



Description. 



12,750 



Putnam County, Georgia, U. S. A. 



Iron. Dropping to pieces from oxi- 

 dation, but breaking up into perfectly 

 regular octahedral fragments. [Smith 

 Collection.'] 



* Mass showing crust, and perfect 

 octahedral cleavage. [Smith Collection.'] 



A very perfect cleavage octahedron, 

 one face of which is shown of double 

 its natural size in Fig. 6. This octa- 

 hedron was so loose in its structure that 

 it was necessary to mount it in pitch 

 before grinding the face, in order to 

 prevent the plates from splitting off. 



It will be noticed that at a, b, and c 

 the spaces between the Widmanstattian 

 plates are filled with a perfectly granu- 

 lar iron, and also that the entire mass 

 is broken up, without reference to the 

 crystalline plates, into irregular poly- 

 gonal masses, suggesting its having 

 been suddenly cooled from a condition 

 of intense heat.f 



* An acute rhombic prism with the 

 faces etched, showing beautiful Wid- 

 manstattian plates arranged parallel to 

 the regular octahedron. 



* Octahedral fragments. 



Pine Bluff, Little Piney, Missouri, 

 U. S. A. 



Stone. Thin slab, light gray with 

 darker grains and considerable iron. 

 \_S7nith Collection.] 



Cosby's Creek, Cocke Co , Tennessee, 

 U. S. A. 



Mass with one polished face, show- 

 ing great variation in structure. Por- 

 tions of the surface show regular and 

 well-marked Widmanstattian figures, 

 while other parts show only irregular 

 polygonal masses with no appearance 

 of crystalline structure. Moreover, 

 bright nickeliferous iron appears abun- 

 dantly in some places, while other por- 

 tions of the surface are entirely free 



t Oliver W. Huntington "On the Crystalline Structure of Iron Meteorites," 

 loc. cit. 



