1893.] Mineralogy and Petrography. 1091 
SiO, Al,O, F,O, MnO MgO CaO Li,O Na,O K,O H,O FI Cr,O, CuO 
L. 53.84 17.76 3.25 2.77 .05 .37 4.60 1.55 10.90 .65 7.78 
F. 46.73 29.00 2.59 3.03 26 9.256.04& 2738  .14 
Among some analyses? made in the laboratory of the University of 
Virginia are the following, which are of interest to mineralogists : 
Cuproplumbite from Butte City, Montana, € by De Bell, gave: 
Cu = 61.32; Pb = 18.97; S — 17.77 ; quartz = 1.58; corresponding 
to 5 Cu, S. Pb S. Dilinin; from New Pim Wythe Ci Va., yielded 
Jones: SiO, = 25.33; ZnO = 67.15; H,O = 7.47; Total — 99.95. 
Parantite, from a pocket in a corundum vein of the Hiawassee Corun- 
dum mine, Hayesville, Clay Co., N. C., is associated with decomposed 
albite and various chlorites. It is in rounded blue-gray lumps, having 
a density of 2.75. Analysed by Berkeley, it gave: 
SiO, ALO, CaO Na,O H.O Total 
47.54 8403 17.28 182 1.02 = 101.64 
North American Minerals.—Remarkably large crystals of sele- 
 euite have been found by Talmage” in the drainage area of one of the 
side cafions of the Tremont River, Wayne Co. Utah. Gypsum in 
seams cuts through the sandstone and argillite of the region in great 
profusion. The largest crystals of the minerals were in a geode-like 
cave, left exposed as a hollow mound in the slope of a hill. The inte- 
rior of the cave was studded with great columns and slabs, extending 
from its sides sometimes to a distance of 51 inches. Many of the 
. erystals are transparent throughout their entire length. 
Fairbanks" describes the rubellite and lepidolite of southern Califor- 
nia as occurring in a pegmatite vein cutting norite near Pala, west of 
Smith's Mt, San Diego Co. Besides the feldspar and the quartz 
` there are associated with the two minerals above mentioned: musco- 
vite, hematite, and green and black tourmalines. 
A few very fine datholite crytals from the Lacy Mine, Loughboro, 
Ontario, have been measured by Pirsson.^ The manner of their occur- 
rence is not certainly known, but they appear to be in a vein penetrat- 
ing an eruptive rock. The crystals are described as the finest yet 
18 Amer. Chem. Jour., Vol. XIV, 1892, p. 620. 
1t Science, X XI, 1893, p. 85. 
P Ib. X XI, p. 85. 
16 Amer. Jour. Sci., Feb., 1893, p. 100. 
