368 M> Stromeyer^s Analyses. 



2. M. Stromeyek, a distinguished professor of Chemist- 

 ry at Goltingen, published about a year ago, the first vol- 

 ume of a work in which he intends to communicate in due 

 order the result of his researches. As the well known 

 ability and accuracy of M. Stromeyer, gives a high value to 

 his labours, we doubt not that it will afford satisfaction to 

 our mineralogical readers, if we state the analyses of the 

 principal substances which he has examined. 



1. jirragonite. — It will be recollected that M. Stromey- 

 er was the first who discovered the presence of Strontian in 

 this mineral, and thereby explained the singular anomaly 

 which it presented, considered as pure Carbonate of Lime. 

 Prismatic Arrogonite from Molina in Arragon, contains, 

 Carbonate of Lime 9S.68, Carb. of Strontian 4 02, Wa- 

 ter of Crystallization 0.30=100. Nine of the Scapiform 

 varieties contain of Carb. of Lime, from 95.30 to i^9. 13, 

 Carb. of Strontian 0.72 to 4.10, Water 0.15 to 0.60. 

 Two of the fibrous varieties, (both from Bohemia,) Carb. 

 of Lime 98.76 and 99.29, Carb. of Strontian 1.0;2 and 

 0.51, Water 0.22 and 0.20. 



2. Magnesite, hard, from Baumgarten in Silesia, Mag- 

 nesia 47.63, Oxide of Manganese 0.i2l, Carbonic Acid 

 50.75, Water L4l=100. 



3. Picropharmacolite of Rugelsdorf in Hessia. This 

 mineral resembles in many of its properties pharmacolite, 

 (arseniate of lime,) but the magnesia which it contains 

 renders it remarkably distinct. 



Lime, 24.65 



Magnesia, 3.22 



Oxide of Cobalt, - - - 1.00 



Arsenical Acid, - - - - 46.97 



Water, ----- 23.98 



99.82 



4. T^ulpinite from Vulpino near Bergami, called Bar- 

 diglio Marble of Ber garni. Vauquelin found it to consist 



