180 The American Geologist. September, 1905 
stite. In common with Herkimer quartzes, also, these 
crystals are found with much lustrous black material which 
glows and becomes white on ignition and appears to be 
in part like the included material of the Herkimer crystals. 
The crystals sent are somewhat smaller than the average 
of those obtained from Herkimer county, but they yet re- 
semble them quite closely. These crystals are re- 
ported by Mrs. Buck to occur in "veins" in the high country 
near Las Vegas, hundreds being there found in each shovel- 
ful of earth, and the best crystals being obtained in pockets 
along with the lustrous black material of which, however, 
only a small amount was included with the sample. 
c. Calcite, Sphalerite, and Pyrite from Oshkosh, Wis- 
consin. The specimens of these minerals were collected 
from the dolomyte quarry one mile southwest of the city of 
Oshkosh and presented to the university of Wisconsin by 
Mr. T. J. Thorson. The calcite shows two habits; one hav- 
ing the form r, (ion) unmodified, the other exhibiting the 
forms f, — 2R (0221) ; v, R 3 (21*31) ; e, — 1 />R, (0112) ; m, Oop 
(1010) ; and r, R (ion), the latter form small. 
The sphalerite shows the ordinary combination of do- 
decahedron and trapezohedron (311). 
d. Minerals from Eau Claire, Wiseo7isin. Specimens 
of pyrite, marcasite, sphalerite, chalcopyrite, and dolomite 
have been obtained from this locality. The pyrite occurs 
in well formed octahedral crystals up to y 2 centimeter in 
diameter, with the cube and dodecahedron truncating the 
angles and edges respectively. The crystals show a green- 
ish to bluish iridescence. Marcasite occurs together with 
the pvrite and in the common tabular forms which are 
bounded by the base, unit prism, and one or more of the 
brachy-domes v. and 1. The dolomite occurs in a simple 
rhombohedron, while the chalcopyrite is found only massive. 
e. Dolo7iiite and white Zinc Oxide from Highland, 
Wisconsin. The dolomite occurs in lenses of small gray 
and curving faced rhombohedrons with dimensions of a few 
millimeters only. The specimen of zinc oxide was pre- 
sented by Mr. Richard Kennedy, mining expert, resident* at 
Highland. This material is quite massive and forms a coat- 
