994 The American Naturalist. (November, 
Miscellaneous.—Hillebrand" has made an analysis of a tellurium 
ore which occurs sparingly in the Cripple Creek district of Colorado, 
and determined it as calaverite. The corrected analysis (disregarding 
traces of elements) from the Raven Mine is Fe 57.40, Au 40.83, Ag 
1.77, total 100.00. The mineral is very imperfectly crystallized, but 
as a result of a crystallograpbical examination Penfield thinks it is 
probably triclinic but near sylvanite in angles and axial ratio. It is 
interesting by reason of the unusually low percentage of silver, which 
in the three specimens analyzed ranged from 0.90 to 3.23 per cent.— 
Emerson” notes several peculiar mineral transformations from Massa- 
chusetts. The so-called “ quartz pseudomorphs” from Middlefield he 
finds to be serpentine pseudomorphs after olivine resembling the Snarum 
forms. Ina boulder at Holyoke was found calcite probably pseudo- 
morphous after common salt. A large sapphire corundum crystal from 
Pelham encloses a crystal of allanite which is much puckered for a dis- 
tance of an inch from the allanite, but elsewhere possesses its usual 
parting.—v. Federow™ finds that in the rocks of the shores of the 
White Sea (granites and gneisses) a vicareous relation seems to exist 
between plagioclase and garnet, the former being developed in large 
quantity only when the latter is present in small quantity and vice 
versa. Hobbs“ describes cerussite from Missoula, Mont., showing the 
forms (110), (100), (130), (010), (001), (832), (111) and (380). The 
crystals are covered by a paper-thin film of galena, doubtless due to 
alteration through the action of sulphuretted hydrogen. Crystallized 
barite from Negaunee and chloritoid from Michigamme are also 
described. 
Am. Jour. Sci., Vol. L, pp. 128-131, (1895), 
Bull. Geol Soc. Am, Vol. 6, pp. 473, 474, (1894). 
13 Tscher. min. u petrog. Mitth., XIV. pp. 550-553, (1894). 
1t Am. Jour. Sci., L, pp. 121-128, (1895). 
PETROGRAPHY-.' 
The Rocks of Gouverneur, N. Y.—An interesting feature of 
the biotite hornblende gneisses’ of the vicinity of Gouverneur, N. Y.,is 
! Edited by Dr. W. S. Bayley, Colby University, Waterville, Me. 
3C. H. Smyth, Jr., Trans. N. Y. Acad. Sciences, xii, p. 203. 
