: 



r - 



* 



;■:■.' 



•\: 



L ki . 



Hi 



K 



H ::; 



- 



E 



ill 



'.■ 



•I 



-' 



K 



H 





.' 







f 





AND MINERALS. 



169 



fZJ™ 1 '^ LAYA > With CrystaIs of leucite ™* bran. Upper 



Galleky 



zite augite. 



Nepiieline, hexagonal felspar {silicate of potash, soda, 



Table-case 

 in Recess 4, 



and alumina). 



• • • 



• • 



R2 Si + 2 Ai Si R 



(Na K 0). 



^t^rr akd atoiie ' eroded and ™°^ «*» 



85— Nepiieline, with mec« and augite, 



86— Nephellne, with granular augite. 



87— Nepheline, transparent crystals in 



With awgre'fe and idocrase. 



augitic lava, 



88— Nephellne, large crystals, with transparent crystals 

 of green augite in limestone. ^ 



Felspar (ttfcofe of potash and alumina). 



89.— Ice SrAR (glassy felspar) 

 mica. J 



90.—Lava, with crystals of 



Grande. 



felspa 



Fossa 



<nW~r^ AVA ' Wlth CrjStals ° f «"&* and leucite > and small 

 S masses of pfc^ (i ^^ J, .^ 



92.— Lava with crystals of felspar, 

 vine. 



olivi 

 93. 



amca, augite, and 



95. 



ith/efop 



th felsp 



felspa 



97— Augite, ufocrcwe and weca. 



<*/< 



QQ n,,.. a c 7 '" c " ana jelspar. 



99-G KEEN Au GITE) with mfca CPJStals ._^ Mfe ^ wo _ 





