L 
Mineralogy and Geology. 267 
by we — of air enclosed with the mineral by means of the 
heat g out. ith samarskite, scarcely any dilatation was observed 
the a foot m air expelled being ten times greater for gadolinite and 
oxyd of chro 
ose has ohenteal from Hermann, a of the ilmenic acid this 
chemist found in his yttro-ilmenite an rochlore of Miask ; 
and he has ascertained that it was mort 1idbic iid mixed with a 
little tantalic and pelopie acid and a = ig of titanic — 
. Bagrationite, a new m Gini el Sram the Urals ; by M. pe Kos 
arov, (Pogg. Ann., Ixxiii; Bib. Univ. de Genéve, Micole 1848, ‘ 
232.)—Bagrationite occurs with diopside and chlorite in the mines of 
Achmatovsk, in opaque black crystals, affording a deep brown on 
It has a vitreous luster on the lateral faces and is submetallic on those 
of the summit. The fracture is uneven or small conchoidal, sieithout 
cleavage. H=6-5. G=4:115. It is not attacked by acids, and whe 
heated in a tube yields no water and no odor. Before the ‘blowpipe it 
oe and then melis to a black magnetic globule. With borax 
and salt of phosphorus it fn ane affording the reactions rer iron and 
silica. The crystals are oblique rhombic, much modifie > M= 
70° 50’, P ; M=104° 8’-~The author places it near gadolinite Tn the 
Bibliotheque Universelle where the description is cited, its close relation 
to Epidote and its probable identity with that species are pointed out. 
3. Pseudomorphism.—Dr. J. ReinnarD Buivm has just issued a sup- 
to this apparent sit vie — plow coninrare of WARD er 
are described in this new vo 
tevin I. 
Pseudomorph. Form imitated. 
Quartz. Heulandite, Stilbite. 
Steatite (Rensselaerite). Hornblende 
Mica Pinite. 
Baowe | iron ore. Specular iron.. 
Fluor spar. C 
Gypsum. Cale spar 
Dolomite. . Calc spar. acattt 
a. Andalusite, feldspar, werne! 
: tourmaline. — , 
Mica, aspasiolite, fahlunite, es- ¥ ae 
i nsdorffit one — 4 
phyllite, weissite eh SS oe ‘pd 
— visetaitias ta Iolite. Ree a ee 
Prehni Natrolite. ae 5 
ed 
* Nachtrag zu den Sate des Mineraleichs, yon Dr. J. Reinhard: 
Blum, pp. 213, 8vyo. Stuttgart, 1847. 
