224 INDEX 



Page 

 "True-veins " ........... 184 



u 



Urals, corundum-syenite in ...... . 205, 210, 216 



w 



Walker, T. L. . , 181, 187, 18$ 



Weathering, limited degree of 215 



Whewell . 185 



Z 



Zinc-spinel . • . . . . . . . . - . . 202 



Zircon in el.-syenite . , . . • . • . • • . 18a 



„ „ felspar-rock • , 202, 215 



