186 



CHARACTERISTIC. 



CLASS- 



Names, 



Hardness. 



3. l| LATROBITE. 



Diploite. Breithaupt. 



4. If FELDSPAR. 



Prismatic Feld-spar. Mr 



Ice-Spar. Werner* 

 ?ORTHOKLASTIC FELSITE. Brei- 



thaupt. 



? PEGMATIC FELSITE. Breithaupt. 

 PMiKROLiNous FELSITE. " 

 ? MURCHISONITE. Levy. 

 ? RYAKOLITE. Glassy Feld-spar. 



5. PERIKLIN. 



Heterotomous Feld-spar. Partsch 

 ? HYPOSKLERIC FELSITE. Brei- 

 thaupt. 

 ? VALENCIAN FELSITE. Breithaupt 



6. IT ALB1TE. 



Tetarto- Prismatic Feld-spar. 

 Partsch. 



Cleavelandite. Brooke. Tetartin 

 Breithaupt. 



7. IF LABRADORITE. 



Polychromatic Feld-spar. Partsch 

 Labrador Feld-spar. 



8. ANORTH1TE. 



Anorthotomous Feld-spar. Partsch 

 Christianite and Biotine. Mon- 

 ticelli &L Covelli. - 



9. IT FOWLERITE. 



Ferro-Silicate of Manganese. 



Thomson. 



Manganesian Feldspar. Crystalli 

 zed Siliceous Oxide of Manganese 

 Silicate of Manganese ? Thomson 



5-75. 



(5-75.) 

 ..6-0.) 



(5-0. 

 (6-0 



..5-5.) 



..6*25.) 



