266 PHYSIOGRAPHY. 



Hornblende. 



rnolite, occur in metalliferous veins and beds in ancient rocks, with ores 

 of titanium, iron, zinc and lead. Common Hornblende frequently enters 

 into the composition of rocks, as in sienile, greenstone, &c. Actynolite is 

 chiefly found in talcose slate. Amianthus lines the sides of narrow veins 

 in primitive mountains. 



5. Basaltic Hornblende occurs in beautiful crystals, near Teising and 

 Teplitz in Bohemia. Large and very distinct, black crystals are found 

 imbedded in granular limestone, at Pargas, Finland. Crystals of a 

 handsome green color, often becoming small, and possessed of rounded 

 edges, occur at Pargas in Finland, in white limestone ; and which have 

 been called Pargasite. The crystals in the drusy cavities of Vesuvian 

 minerals, though small, are generally very distinct, and possess a high 

 degree of lustre. Handsome varieties of Tremolite are found in dolomite 

 at St. Gothard : Amianthus in great abundance at Corsica, also in Pied- 

 mont, Savoy, Salzburg, and Zoblitz, in Saxony. Rock-wood exists in 

 large masses, in a metalliferous bed at Sterzing in the Tyrol : Rock-cork 

 at Johanngeorgenstadt in Saxony, at Sahlberg in Sweden, in Moravia, 

 and at the Lead-Hills in Scotland. Green Diallage, generally accom- 

 panied by Garnet and Saussurite, occurs at Corsica, on Monte Rosa, in 

 the Bacher, and several other places in Southern Europe. 



The United States afford the present species in all its varieties. Long 

 black crystals, sometimes flattened through the truncation of the obtuse 

 lateral edges, occur at Chester, (Mass.) and at Franconia, (N. H.) ; the 

 latter place likewise affords brilliant blacjc prisms, having the acute late- 

 ral edges replaced. Large and handsome black crystals (dodecaedre. H.) 

 occur at Newton, (N.J.) Small but very perfect black crystals, are 

 found at Willsborough, (N.Y.) upon the mountain near the well known 

 Garnet and Tabular Spar locality, where they occur imbedded in black 

 Tourmaline. Very distinct reddish brown crystals, one or two inches 

 long, and possessing nearly the same diameter, have been obtained along 

 with black Spinel, at Amity, (N.Y.) Hair-biown and greenish white 

 crystals, of unusual finish and beauty, occur in the limestone of Eden- 

 ville, (N.Y.) : also a light greyish white variety in limestone, from the 

 same vicinity, associated with yellow Tourmaline and Rutile, whose crys- 

 tals are often coated and penetrated by Kerolite. White crystals, above 

 an inch long, and three quarters of an inch wide, but much flattened, 

 abound throughout the dolomite beds of Litchfield co. (Conn.) particu- 

 larly at Canaan ; they are also found under similar circumstances, far- 

 ther north into the borders of Mass achusetts, at Sheffield and Great Bar 



