Geology and Mineralogy. 151 
Bourbonne, as they were also at Plombiéres, within eight meters 
of the surface, and at a temperature but little elevated; how 
great, then, asks Daubrée, must be the transformations we 
should witness if we could descend to the deeper parts of the 
conduits of thermal waters; and what the changes that must have 
gone on at all times through the waters penetrating the earth’s 
deeper rocks and fissures. 
Further notes on inclusions in Gems, by Isaac Lea, LL.D. 
ll pp. 8vo. Philadelphia, 1876.—-Dr. Lea, in continuation of his 
former paper on this subject, describes cavities and minute crys- 
tals observed by him in tourmaline; of a cubic form and including 
a fluid, in an emerald; blue, and 4-sided, in iolite; tubular cavities, 
with a cubic crystal with fluid in one cavity, in blue corundum o 
North Carolina; minute acicular crystals in corundum of Dela- 
ware Co., Pa., producing a bronze-like luster; and other results of 
er observations. The paper is accompanied by a lithographic 
ate 
15. ae ery Map of EHurope.—A small colored oad 
fa) K J . . . 242 k 
xis, lwo vari 
up of hexagonal lamelle, with perfect cleavage, and the other 
very compact, with the cleavage scarcely visible. Double refrac- 
i i ative. H.= 4°75, G.= 3°07. Color rose- 
red; streak pinkish-white. ‘Transparent in thin fragments, i 
th varieties mentioned give the same composition ; in fact they 
8s into one another. M. Bertrand writes the formula 4MnO, 
ound at the manganese mine of Adierville, valley of Louron 
E. 8 
Cra | 
e 
a 
sae 
5°] 
te 
bar 
fenhs 
=] 
Os 
oO 
— 
~ 
. R., May 15, 1876. + 
17. Analeite not isometric.—Prof. Schrauf, (1. ¢.) from an ex- 
ied 
system. The 
