72 PHYSIOGRAPHY. 



Blende Bloedite. 



4. Blende is an abundant and widely diffused ore ; but all its varieties 

 are not equally common. It is found in beds and veins, accompanied by 

 Galena, Copper Pyrites, Heavy Spar, Fluor, Spathic Iron, &c. It also 

 occurs in silver veins associated with Native Silver and other ores of that 

 metal. 



5. Yellow Blende principally occurs in fine varieties at Schenmitz in 

 Lower Hungary, and at Kapnick in Transylvania ; also in Saxony, at 

 Ratieborzitz in Bohemia, at Gummesud in Norway, and other places* 

 Brown Blende is found at Freiberg and other localities in Saxony, Bohe- 

 mia, the Hartz, Sweden, and in great quantities in Derbyshire, Cumber- 

 land and Cornwall in England. The radiated variety, in particular, is 

 found at Przibram ; it is this variety in which STROMEYER detected the 

 metal Cadmium. The fibrous Blende occurs at Geroldseek in the 

 Brisgau, and at Raibel in Carinthia. Black Blende comes from Frei- 

 berg, Annaberg, Breiten brunn, and Schwarzenberg in Saxony, and mar 

 ny places in Bohemia, Hungary, Silesia and other European countries. 



The localities of Blende in the United States are very numerous ; a 

 few of these only therefore can be indicated. The yellowish-brown fol- 

 iated variety is found abundantly along with Galena at North and South 

 Hampton, (Mass.) ; the black Blende occurs at Monroe, (Con.) associa- 

 ted with Wolfram, Tungsten, Native Bismuth and Arsenical Iron ; the 

 yellow Blende in transparent crystals is met with occasionally through- 

 out the secondary limestones of New York and Ohio. The Missouri 

 lead mines, and the Perldomcn lead mine near Philadelphia, abound with 

 the present species. 



BLOEDITE. 



Crystalline. Primary form unknown. Massive : imperfectly 

 foliated, and stalactitic. Fracture uneven. 

 Color between flesh and brick red. 



Taste sharp bitter and astringent. Becomes moist in the air. 

 1. Analysis. 



By JOHN. 



Sulphate of soda . . . 33-34 



Sulphate of magnesia . . . 36-66 



Sulphate of manganese . . . 0-33 



Sulphate of iron . . . 034 



Chloride of sodium . . . 0-33 



Water 22-00 



