520 



MEASUREMENTS OF CRYSTALS. 



GALENA. (Contmued.) 



P one 125°15'52" 



c on c 109 28 16 



Fig. 493. A compound crystal. Orange 

 county. 



WHITE LEAD ORE. Fig. 49G. Page 414. 

 Fig. 496. The primary, a right rhombic 

 prism. 

 M on M' 117° 0' 



ANGLESITE. Fig. 497. Page 415. 



Fig. 497. The primary, a right rhombic 

 prism. 

 M onM' 103°42' 



YELLOW LEAD ORE. Fig. 498. Page 416. 

 Fig. 498. The primary, an octahedron 

 with a square base. 



P onP' 131015' 



P onP 99 50 



PYROMORPHITE. Fig, 499. Page 417. 

 Fig. 499. A secondary form. 



M on M' 120° C 



MonP 90 



PYROMORPHITE. 



M on c' or M' on c" .. 131 45 



M or M' oncV 150 



P on core' 1.38 30 



c' on c or c" 110 5 



VAUaUELINITE. Fig. 500. Page 418. 

 Fig. 500. A compound crystal. 

 P on P' over the summit, 134°30' 

 Pon/i 149 



NATIVE BISMUTH. Fig. 501. Page 419. 

 Fig. 501. The primary, a regular octa- 

 hedron. 



NATIVE COPPER. Fig. 502. Page 420. 

 Fig. 502. The primary, a cube. 



RED COPPER ORE. Fig. 503. Pago 421. 



Fig. 503. The primary, a regular octa- 

 hedron. 



VITREOUS COPPER. Pig. 504. Page 422. 

 Fig. 504. The primary, a right rhombic 

 prism. 

 M on M' 119°35' 



