PHYSIOGRAPHY. 201 



Sphene. 



in a bed in gneiss, consisting almost entirely of Augite Spars and Feld- 

 spars. At \Tindisch-Kappel in Carinthia and near Dresden in Saxony, in 

 similarly compound rocks of a newer date. It occurs in beds of iron ore 

 at Arendal in Norway; in veins at St. Gothard in Switzerland, in the 

 Felbcrthal in Salzburg, and in many other places in the Alps. It is 

 found besides, in France and at several places in Scotland. It occurs in 

 Canada, at Grenville associated with Tabular Spar and Plumbago.* 



It is found in the greatest abundance in the United States, at Roger's 

 Rock on Lake George, disseminated in small brown crystals through an 

 aggregate of Feldspar and Pyroxene. A similar variety is found, crys- 

 tallized and massive, in nodules and geodes with Pyroxene and Petalite, 

 in the limestone of Bolton, (Mass.) In small quantity also, in round- 

 ed grains and imperfect crystals, disseminated through limestone with 

 Hornblende, &c., at Edenville and Amity, (N. Y.), and at Trumbull, 

 (Conn.) 



SPHEROSIDERITE. (See Spathic Iron.) 



SPHEROSTILBITE. * 



Massive : globules formed in vesicular cavities. Composition 

 columnar, radiating from the centre. 



Lustre pearly, very brilliant on the fracture. 



Fibres flexible. Surface of the globules scratched by the nail. 

 Sp. gr. =2-31. 



1 Fusible before the blow -pipe, with exfoliation and effervescence. 

 Forming a jelly with the acids. The solution yields a precipitate with 

 the oxalate of ammonia. 



2. Analysis. 



By BEUDANT. 



from Faroe. 



Silica 55-91 



Alumina 16-61 



Lime 9-03 



Soda 068 



Water 17.84 



* The specimens from this locality cleave constantly and with great 

 perfection, parallel with a rhombic prism of 123 30', which is oblique 

 from an acute edge. 



