MINERALOGICAL STRUCTURE N.E. LIZARD DISTRICT. 



Plate B. 



Fig. 5. — Olivine and Felspar far advanced 

 into the Hornblendic change.. 

 Coverack. 



Fig. 6. — Felspar and Olivine changing into 

 Hornblende : Augite unchanged. 

 Coverack. 



Scale 20 diameters. 



Polarized light. 



T. CLARK, A.M.8., HOBO. 



Fig. 7.— Crystal of Olivine partially sur- 

 rounded by Augite and by 

 Felspar. Dean Point. 



Fig. 8.— Felspar and radiated Hornblende, 

 with Magnetite. Manacle Point. 



