Miscellanies. 387 



color gives a liver brown streak of a conchoidal fracture and weak 

 lusture ; its spec. grav. is between 2.5 and 2.57. 



6. Wolchouskoit. — Kammerer described a new mineral from Si- 

 beria which is amorphous, bluish green opake, and of conchoidal frac- 

 ture ; its touch is greasy, gives a bluish green streak and adheres 

 slightly to the tongue ; consists of silica, alumina, oxide of chrome 

 and water. 



7. Worthite, 



Hi 



found in a scapolitic boulder from the neighborhood of Petersburg. 

 It is colorless, crystalline foliated, of specific gravity of about 3.0; 

 harder than quartz, infusible before the blow-pipe and dissolves with 

 difficulty and with effervescence ; in soda it becomes transparent 

 and yields water by heating in a tube ; it becomes dark blue with ni- 

 trate of cobalt. Hess found it composed of Silica, 40.58 



Alumina, 

 Magnesia, - 

 Water, - 

 The formula is AAq+SS. 



- 53.80 



1.00 



- 4.63 



8. Pyrargillite. — Nordenskold discovered and analyzed two new 

 minerals from Finland, the one he calls by the above name from its 

 character of diffusing a clayey smell by heat. It is partly black, 

 light and lustrous like the Lordawalite and partly bluish granular or 

 red and without lustre ; it seldom occurs pure in uncrystallized mass- 

 es, the form of which approaches to a four sided prism with truncated 

 angles sometimes it is traversed with chlorite so as to appear spark- 

 ling by polishing; its specific gravity is 2.505 ; its hardness 3.5 ; it is 

 decomposed completely by muriatic acid ; it occurs in granite and it 



Silica, - - - 43.93 



Alumina, - - 2S.93 



Protoxide of Iron, - 5.30 



Magnesia with some Pro- > ^ qq 



consists of 



Formula. F 



M 



N 



+4AS+Aq 



toxide of Manganese, 



assa 



1.05 



*J W 



I Soda, - - - 1-85 



ater, 



15.47 



[Loss, - - - °- 5 8 



9. Amphodellite.—Thh is the other mineral discovered by the 

 above author from the lime quarries of Lozo in Finland, its crystalli- 

 zed form bears much analogy to that of felspar; it is clear reddish, re- 



Vol. XXVL— No. 2. 50 



