286 PHYSIOGRAPHY. 



Yellow Lead-Ore Yenite. 



combination with b. c commonly, P often, and e always, 

 rough. 



Lustre resinous. Color generally wax-yellow ; passing 

 into siskin-green and olive-green, also into orange-yellow, 

 yellowish-grey and greyish white. Streak white. Semi- 

 transparent, translucent on the edges. 



Brittle. Hardness = 3-0. Sp. gr. = 6-760, orange 

 yellow, crystals from Annaberg in Austria. 



Compound Varieties. Massive : composition granular, 

 of various sizes of individuals and firmly coherent. 



1. Before the blow- pipe, it decrepitates briskly, and assumes a darker 

 color, which however, again disappears. Alone upon charcoal, it melts 

 and is absorbed by it leaving behind some reduced globules of metallic 

 lead. It is with difficulty soluble in acids. 



2. Jlnalysis. 



By KiLAPKOTH. By HATCHETT. 



Oxide of lead . . 64-42 . . . 58-40 

 Molybdic acid . . 34-25 . . . 38-00 

 Oxide of iron . . 0-00 . . . 2-08 

 Silica . . 0-00 . . . 0-28 



3. The present species is found in beds and veins in newer limestone, 

 with ores of lead and zinc ; more rarely also in veins with similar min- 

 erals in primitive rocks. 



4. It occurs in many of the lead mines of Carinthia, as at Deutsch- 

 Bleiberg and Windisch-Bleiberg, Windisch Kappel, &c. also at Anna- 

 berg in Austria. It is likewise found in limestone at Annaberg; and in 

 the copper mines of Rezbanya in Upper Hungary. Other localities are 

 Zimapan, Mexico and Moldawa, Bannat; at the latter place it is found 

 in crystals of a hyacinth-red color. In the United States it occurs at the 

 Perkiomen lead-mines, near Philadelphia, and in the lead-mine of South- 

 ampton, (Mass.) ; but at both of these places in limited quantities. 



YELLOW TELLURIUM. (See Mullerite.) 

 YENITE. Di-prismatic Iron-Ore. MOHS. 

 Primary form. Right rhombic prism. M on M = 1 12 



