Mineralogy and Geology. 127 
14. Vessels for the preservation of fluohydric acid.—Stive.er has 
found that gutta percha and vulcanized India rubber resist the action of 
fluohydric acid almost compietely. A solution of the acid which was 
so concentrated as to fume in the air, was found, after having been for 
somewhat brighter colored on the inside.—Ann. 
acié, Ixxxvii, 187.—[It would doubtless be possible to cover the inside 
surface of a glass bottle with gutta percha by pouring in a solution of 
- the gum resin in chloroform.—w. ¢.] W. G. 
II. Mrineratocy anp GEo.Loey. 
1. Parophite—A rock allied to the Dysyntribite of Shepard, and 
Rensselaerite of Emmons, has been named Parophite by T. S. Hunt, 
(Logan’s Rep. Geol. Survey of Canada, Quebec, 1852, p. 95.) 
name alludes to its resemblance to Serpentine, notwithstanding its non- 
magnesian character. It occurs imperfectly schistose, as well as mas- 
sive, and sometimes a perfect schist ; rarely botryoidal, with an aopear- 
Tex . G27 
ance of concentric structure. re granular to compact 
2 olor pale greenish, yellowish green, olive green, ash grey, 
reddish. Lustre waxy, shining; subtranslucent ar ot over 
to Mr. Hunt— 
si. & Mg K Na H 
1. Schistose, 48°50 27:50 567 1:30 2°24 530 191 17:00 G=2°705 
2. Schistose, 4842 27:60 450 280 1:0 5°02 278 688=—9980G—2-714 
3. Botryoidal, 4913 2780 590 3:80 1:40 undet. 1 a G.=2:784 
4, Schist, 4810 2870 480 210 141 449 153 840=99°53 
at the centre, of feldspar, pyrosclerite, mica, Amphibole, pyroxene, 
Sphene are common in the feldspar or pyrosclerite of these nodules. 
Delesse shows that the pyrosclerite has resulted from the alteration of 
the feldspar nodule previously formed. ‘This paper enters into import- 
ant discussions respecting the origin of crystalline limestones and 
their minerals, 
Pyromeride of the Vosges; M. Detesse, (Bull. Geol. Soc. France, 
[2], ix, 175.)—This Pyromeride is a kind of quartziferous porphyry. 
Containing small globules through it. The variety from the Vosges 
closely resembles that from Corsica. Delesse finds that the globules 
consist mostly of silica, being a mixture of silica (over 60 per cent.) 
. 
and feldspar. He obtained in an analysis : 
Bi Al Be Oa Mg K, Na (by diff.) H 
8809 «603 05888185 58 2. 3 We 100_ 
