518 



MEASUREMENTS OF CRYSTALS. 



COPPERAS. Pig. 474. Page 399. 



Fig. 474. The primary, an oblique rhom- 

 bic prism. 



MonM' 82°21' 



M onP 99 23 



CHROME-IRON ORE. Figs. 475 and 476. Page 

 400. 



Fig. 475. The primary, a regular octahe- 

 dron. 



PonP' 109°28'16" 



Fig. 476. A modification of the same, 

 found at Hoboken, New-Jersey. 

 Pono 144°44'8" 



VIVIANITE. Fig. 477. Page 401. 



Fig. 477. The primary, a right oblique 

 angled prism. 

 MonT 125°18' 



ILVAITE. Pig. 478. Page 403. 



Fig. 478. The primary, a right rhombic 

 prism. 

 M on M' 112°37' 



SILICATE OP IRON (artificial). Fig. 479. Page 

 404. 



T on A 138°31' 



T onn 114 6 



MANGANESE SPAR. Fig. 480. Page 406. 

 Fig. 480. The primary, a doubly oblique 

 prism. 



M onP 93° to 94° 



MonT 121 



BABINGTONITE. Figs. 481 and 482. Page 407. 



Fig. 481. The primary, a doubly oblique 

 prism. 



MonP 92°34' 



MonT 112 30 



P onT 88 



Fig. 482. 



gonm 132°15' 



A on 771 137 5 



h out 155 25 



ZINC BLENDE. Figs. 483 to 487 inclusive. Page 

 408. 



Fig. 483. The primary, a rhombic dode- 

 cahedron. 

 P onP 120° 0' 0" 



Figs. 484, et seq. 



gong" 70°31'44" 



^ on 771 or g' on 7?i' . 109 28 16 



GALENA. Figs. 488 to 495 inclusive. Page 412. 



Fig. 488. The 'primary, a cube. 



