64 



PROCEEDINGS OF THE AMERICAN ACADEMY 



Date of Fall or Find. 



Found 1340. 



Found 1840. 



No. 



145 



14G 



Weight 



in 

 Grams. 



159 



118 



86 

 62 



50 

 48.5 

 9.5 



2,237 



782 



281.5 

 15 



Description. 



the Smith Collection it bears the label 

 " Smithland, Lincoln Co., Tenn.," but 

 appears identical with the Coney Fork 

 specimens. 



* Polished slab, containing a large 

 nodule of troilite. Crust on edges. 

 [Smith Collection.'] 



* Slab, with both sides highly pol- 

 ished. [Smith Collection.'] 



* Polished slab. [Smith Collection.] 



* Etched slab. 

 [Smith Collection.] 



* Polished slab. 



* Very thin slab. 



Crust on 



edge. 



[Smith Collection.] 

 [Smith Collection.] 

 Piece consisting of a single set of 

 parallel plates. 



Petropavlovsk, Mrass, Tomsk, Siberia. 



Careyfort, De Kalb Co., Tennessee, 

 U. S. A. 



Iron. Two surfaces, cut at right 

 angles and etched, show typical Wid- 

 manstattian figures. One face con- 

 tains a large nodule of troilite, the rest 

 crust. [S?nith Collection.] 



This specimen shows hollow octahe- 

 dral faces, two inches in diameter, like 

 hopper crystals, consisting of skeletons 

 built up of a series of plates about half 

 an inch wide and one sixteenth of an 

 inch thick. These plates, when cut 

 transversely, constitute the Widman- 

 stattian figures. When the section is 

 cut at random, the figures may differ 

 somewhat in character, and the plates 

 appear to make various angles with 

 each other; but when the etched sur- 

 face is parallel to an octahedral face, 

 the 'Widmanstiittian figures all make 

 equilateral triangles, their sides being 

 parallel to the octahedral edges. Fig. 

 7 shows of original size an etched sur- 

 face of this specimen cut parallel to an 

 octahedral face. [Smith Collection.] 



Shows crust and three etched faces. 

 [Smith Collection.] 



* Shows crust and two cut faces. 

 [Smith Collection.] 



