368 Analyses of Chabasie. 



I. Chabasie from Biebendorfel near Aussig, Bohemia. 



Specific gravity at +7° 7 R. =2.127. The quantity of the 

 powdered mineral used, was 2.6712 gr. The result of the analysis 

 was the following : 





Percent. Oxygen. 



Silica, =1.2869 48.18 25.027 8 



Alumina, =0.5148 19.27 8.998 3 



Lime, =0.2580 9.65 2.710 



Soda, =0.0414 1.54 0.393 J> 1 



Potash, =0.0058 0.21 0.035 



Water, = 21.10 18.753 6 



7 



99.91 



II. Chabasie from the Fassathal, Tyrol. 



Specific gravity at +8° 3 R. =2.1 17. The quantity of the pow- 

 dered mineral used, was 2.7381 gr. The analysis produced the fol- 

 lowing result. 



Per cent. Oxygen. 



Silica, =1.3318 . 48.63 25.262 8 



Alumina, =0.5345 19.52 9.118 3 



Lime, =0.2799 10.22 2.870 



Soda, =0.0155 0.56 2.142 J- 1 



Potash, =0.0079 0.28 0.047 



Water, = 20.70 18.339' 6 



99.91 



• 



III. Chabasie from Parsboro\ Nova Scotia. 



Specific gravity at +70° 6 R. =2.075. The quantity of the 

 powdered mineral used, was 2.5878 gr. The result of the analysis 

 was the following : 



Per cent. Oxygen. 



Silica, • =1.3318 51.46 26.732 9 



Alumina, =0.4570 17.65 8.242 3 



Lime, =0.2308 8.91 2.502 



Soda, =0.0284 1.09 0.278 ^ 1 



Potash, =0.0043 0.17 0.028 



Oxide of iron, =0.0284 0.85 



Water, = 19.66 17.473 6* 



99.79 



» According to a communication of Prof. G. Rose, however, there appears to 

 be no difference in the angles or structure of the chabasie from Parsboro' compared 

 to that of other localities. 



