~~ 
_ Mineralogy and Geology. 271 
except a questionable difference in color. Any one reading v. Kobell’s 
description of arzeoxene’ and Bergemann’s ‘original description of the 
physical characters of dechenite? could hardly fail to conclude that they 
h 
2, 
with hematite at the Jackson Iron Mountain, near Marquette, Lake Supe- 
Tor. Some of the specimens have the hyacinth-red color which charac- 
terizes the variety of githite called by the Germans “ Rubinglimmer, 
It also occurs in acicular crystals of an almost velvet-black ea — 
ie 
: ri 
ticed briefly in this Journal,’ has been further investigated by Stromeyer 
and Pete 
acid in the cold, cave a residue consisting of a crystalline powder, and 
rounded ke of the size of a lentil These kernels are translu- 
cent, white on the exterior, and interiorly yellowish. Hardness, between 
3 and 4, Stromeyer found the limestone to contain 16°6 of crystalline 
heedles, and 14-8 of the rounded kernels. The specific gravity : 
former was 2-7, of the latter 30. The air-dried mineral was constant in 
artz. 
8B Fe asf Qu fe ce 
ti Needles, 36°66 rom 1°66 699 049 0°20 — vir 
2. Kernels, 3460 4944 320 1237 020 —— = 
Nie. 2 Pogg. Ann., Ixxx, 393. 
* Vol sain yest ee. * Ber, Wien, Akad., xlvii, $48. 
