518 
MEASUREMENTS OF CRYSTALS, 
COPPERAS. Fig. 474. Page 399. 
Fig. 474. The primary, an oblique rhom¬ 
bic prism. 
M on M'. 82°2P 
M on P . 99 23 
CHROME-IRON ORE. Figs. 475 and 476. Page 
400. 
Fig. 475. The primary, a regular octahe¬ 
dron. 
P on P'. 109 o 28'16" 
Fig. 476. A modification of the same, 
found at Hoboken, New-Jersey. 
P on o . 144°44 / 8" 
VIVIANITE. Fig. 477. Page 401. 
Fig. 477. The primary, a right oblique 
angled prism. 
M on T . 125° 18' 
ILVAITE. Fig. 478. Page 403. 
Fig. 478. The primary, a right rhombic 
prism. 
M on JVF. 112° 37' 
SILICATE OF IRON (artificial). Fig. 479. Page 
404. 
T on k . 138°31 / 
Ton/z . 114 6 
MANGANESE SPAR. Fig. 480. Page 406. 
Fig. 480. The primary, a doubly oblique 
prism. 
M on P. 93° to 94° 
M on T.121 
BABINGTONITE. Figs. 481 and 482. Page 407. 
Fig. 481. The primary, a doubly oblique 
prism. 
M on P . 92°34 / 
M on T .. 112 30 
P on T . 88 0 
Fig. 482. 
g on m . 132°15' 
h on m . 137 5 
h on t . 155 25 
ZINC BLENDE. Figs. 483 to 487 inclusive. Page 
408. 
Fig. 483. The primary, a rhombic dode¬ 
cahedron. 
P on P . 120° O' 0" 
Figs. 484, et seq. 
g on g' . 70°31 / 44 v 
g on m or g' on mf . 109 28 16 
GALENA. Figs. 488 to 495 inclusive. Page 412. 
Fig. 488. The primary, a cube. 
