CONTENTS 



I. — Introduction ....... 



1!. — Geological relations and origin . . . 



III.— Petrological characters — 



/. ElcBolite-syenite ...... 



(a) The prevalent gneissose variety with graphite 



(b) Contemporaneous veins • • • 



(c) Variety with plagioclase and microcline 



(d) Mottled variety with calcite • . • 



(e) Basic, hornblendic schlieren with calcite . 

 2. Augite-syenite ..,..« 

 j. Felspar-rock with corundum • • • 



IV. —Origin of the Corundum . • • • 



V.— Summary ........ 



index . , . . . . « , 



169 

 171 



177 

 177 

 184 

 192 



194 



19S 



199 

 201 

 205 

 213 

 219 



