Geology and Natural History. 239 
very nearly approaches the composition of wagnerite, but accord- 
ing to recent analyses of v. Kobell (Sitz. Mtinch. Akad., May, 
1873), the latter contains 
P 45-70, Mg 37-18, Na 3°97, Ca 1°81, Fe 11°34, 
which shows wagnerite to be richer in fluorine and soda than 
Kjerulfine—Sitzung Minch. Akad., March, 1873. 
12. Tschermakite, a new feldspar.—Associated with the kjerul- 
fine above mentioned, von Kobell subsequently found another 
new mineral, a magnesia-soda feldspar, which he has named Tscher- 
makite. This occurs massive, with two cleavages at an angle of 
94°. The more perfect cleavage has fine striations, resembling 
a 
most adamantine; color grayish white, translucent to semi-trans- 
arent. H.=6. G, 2°64, i 
mie light on heating, B.B. fuses quietly at 3 to a translucent 
glass 
tacked by acids, but on boiling for a long time with hydrochloric 
acid the solution reacts for alumina and magnesia. Analysis gave 
Si Al Mg Na kK 
6657 15°30 800 680 fr.  2°70=99°87 
from which, assuming the water to be basic, v. Kobell gives the 
ratlo of oxygen for R, ®, Sil:1:5. Named after G. Tschermak 
of Vienna,—Sitzung Miinch, Akad., Dec., 1873. 
tributary of the Illinois), in the northeastern part of Illinois. 
John Torrey died on the 10th of March, 1873, in the 77th year 
of his age. This Journal has published a short notice and a 
fuller biography of Dr, Torrey; the latter forming a part of the 
Council of the ‘American Academy’s Report, May, 1873. 
illiam S. Sullivant, of Columbus, Ohio, died on the 30th of 
April last, at the age of 70 years. A biographical notice of this 
