136 J. L. Smith —New Meteoric Mineral. 
or terminal segment. The anterior end of each spine seems also 
_ to be furnished with a ball and socket joint, as there is a strongl 
l 
Montreal, July 6, 1880. 
Art. XX.—A new Meteoric Mineral ( Peckhamite), and some addi- 
tional facts in connection with the fall of Meteorites in Iowa, May 
@0th, 1879; by J. Lawrence Smiru, Louisville, Ky. 
THE mineral now named Peckhamite was referred to in a for- 
mer paper on the Emmet Co. Meteorite.* Having since been fur- 
nished with additional material, I have been enabled to make a 
more positive determination as to its distinctive characters. It 
is decidedly different from any mineral I have seen associated 
with meteorites. In two or three specimens it projected above 
the outer surface, having a dingy yellow color and a fused sur- 
face. When broken it has a greasy aspect with a more or less 
Oxygen ratio 
1 2 from No. 2. 
Silica 49°50 49°59 25°73 
Ferrous oxide 15°88 17°01 3°77 
Magnesia 33°01 32°51 12°76 
98°29 99°11 
No. 1 was made with 100 et ie detached by myself; and 
No. 2 with 350, sent to me by a friend. The oxygen ratio gives 
very closely the formula Si®+3(SiR.) or perhaps more correctly 
* This Journal, June, 1880, . 
oie 
