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Review of Dana's Mineralogy. 379 
Sreiire.—This mineral has been described by Dr. 'Thomson,* 
and a mineral was mentioned by Dr. Beck in an article in this 
Journal, (Vol. xxiv, p. 54,) as identical with it, which has been 
found at Bergen Hill, and widely circulated under the name of 
Thomsonite. This mineral yielded to Dr. Beck’s analysis,— 
silica 54-60, lime 33-65, magnesia 6°80, oxyd of iron with a little 
alumina 0°50, water and carbonic acid 3-20. 
“Mr. A. A. Hayes has analyzed the same mineral with quite a dif- 
ferent result, as follows :—Silica 55:96, lime 35°12, soda 6°75, potash 
0-60, alumina and magnesia 0-08, protoxyd of manganese 0°64, water 
(hygrometric) 0:16—99-31. The large per centage of soda and the 
proportion of silica and lime, would seem to ally the species to Pectolite, 
from which, however, it appears to be removed by containing no water.” 
‘The author has compared specimens of the stellite of Bergen Hill 
with the foreign pectolite in Mr. J. A. Clay’s cabinet at Philadelphia, 
and finds them closely similar in external character ; moreover, Fran- 
kenheim, in a late article, makes pectolite an anhydrous mineral, sta- 
ting that the water varies, and is not an essential ingredient.” (p. 336.) 
Haypenire. Chabazius monoclinatus.—This interesting spe- 
cies is found in company with a rare and curious modification of 
Heulandite, which M. Levy has endeavored to establish as a dis- 
tinct species under the name of Beaumontite, but which Mr. 
Alger has shown (this Vol. p. 233) to be Heulandite. The Hay- 
denite was also reéstablished by Levy on crystallographic grounds, 
but as it is still doubtful whether its primary may not be a rhom- 
bohedron, like chabazite, instead of a rhombie prism, a chemical 
analysis was undertaken by B. Silliman, Jr., to settle the question. 
We copy the figure given by Mr. Dana, and from the appendix 
the chemical examination. 
“ Primary form, an oblique rhombic prism, Fig. 11. 
(Levy.) M: M=98° 22’, P: M=96° 5’. Clea- 
vage: lateral and basal, perfect; the latter 
little the most so.. Twin crystals compounded 
parallel with P, as in the annexed figure. 
“H.=3. G=2-136—2-265, (Silliman.) Lus- 
tre vitreous; bright. Color brownish-, greenish-, or wine-yellow. 
Translucent—transparent. Brittle. 
“Dissolves partially without gelatinizing in sulphuric acid, and on 
cooling deposits crystals of alum. Fuses with difficulty before the blow- 
Pipe—tinges the outer flame violet. Heated in a glass tube alone, it 
gives off a slight empyreumatie odor, and deposits water.—(Silliman.) 
* Outlines of Min. and Geol. Vol. I, p. 313. at 
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