form, rhomboid. Secondary form, a modi- © 
Report on Meteorites. 383 
31. Nickeliferous Iron.—Under this name are probably includ- 
ed two or more species, which will hereafter be distinguished from 
each other. Sp. gr. = 6°5..8-0. Generally very crystalline, 
ough sometimes nearly compact. When polished surfaces of 
this alloy are acted upon by dilute nitric acid, they generally af- 
- ford very beautiful Widmannstittian figures ; the precise arrange- 
ment of which is rarely identical, except in irons from one and 
_ the same fall. 
32. Native Steel.—Massive. Highly crystalline: in lamine 
generally parallel, sometimes confusedly crossing. H. = 6:0...6°5. 
Sp. gr. = 7-33...7-4. Color steel-grey: It yields very delicate 
_ Mystalline lines on being etched. Randolph Co., N. C., and Bed- 
ford Co., Va. ' 
33. Nickeliferous Steel.—In structure, it much resembles na- 
tive steel. H.=6-5. Sp. gr.=7-117. Color steel-grey, inclined 
to pinchbeck-red. It contains (beside iron and carbon) nickel, 
Copper and cobalt. Otsego Co.,.N. Y.. - ' 
34. Magnetic Iron Pyrites——Primary ‘Fig. 5. 
fied six-sided prism. See fig. 5. 
SM on: os 1639-304. 
¢ ona=117 30. 
Cleavage imperfect. Brittle. Lustre. steel- 
like and splendent. Color steel-grey upon 
the crystalline faces; copper-yellow on frac- 
ted surfaces. Very liable to tarnish; of 
which, steel-blue and red form the most frequent tints. "The erys- 
Is are generally hollow, or possessed of spherical cavities. Like- 
Wise massive and foliated. Sp. gr.=4-454, (from Cocke Co.,T'enn). 
The erystals above described, occur lining cavities in the Rich- 
mond stone :* also, under a more highly modified form, in the 
Juvenas stone.t 
35. Schreibersite, ( Shepard ).—Named in honor of the late Carl 
Von Schreibers, Director of the Imperial Cabinet at Vienna, and 
: well known author on meteorites. In small, deeply striated 
_ Prisms ; angles indeterminate; traces of cleavage parallel with sides 
of prism. H. = 4-00, Lustre imperfectly metallic. Color brown- 
ish black. Streak unaltered. Opake. Brittle. Before the blow- 
r Amer. Jour, Ist Ser., xvi, 201. 
t Ann. de Chim. et de Phys., t. xxxi, p. 87. 
