IKDKX. 



XI 



n-c of sdiibts, 21s prc-l'otstlani a^n? of 



s;iiii.l^Loiic, 'JO. 

 AVichmniiii, A., dioriU' of, 87 ; on crlo-iU', 

 48 ; oil i'ciilspar ci-ysLuls, 4i ; limits be- 

 tween jumper ami ore, 153 ; oil ollviiic-dia- 

 basc, 70; on Llio L'lTsquu Idle HiM-pciiliiu', 

 62; roport ou tlit; rocks of iliu ii'on dis- 

 ii-ict, (K) ; use of Icnu (]U[irlzI(o, 5vS, oO ; 

 originally funiicd pruducls iu feldspar, 55, 



50. 

 "Wiiiclicll, A., on ilic iron disifict, 17, 18; 

 sudinn'ntarv orii^iii of iron ores and dio- 



rites, 17, 18. 

 Wist'Oiisin ficoloti'ists, defective mclliods of, 

 107, 118 ; ou the Iveweeiiawan series, 107. 



Wi'iiilil, C. E., metamorpliie origin of gran- 

 ilr, 25; origin of " soft heniatUe," 25; 

 relation of Laiirculiaii and Uuronian, 25; 

 salt eubes in quartz, 25, 50 ; sedimentary 

 orii'-in of iron ore, 25 ; nnity of foliation 



and slratifu'allon, 



25. 



/kolitks, formation of, 111, '.13. 

 Zircon crystals in (piarli^ and feldspar, 56; 

 in granite, 57; microlitcs of, in quartz, 



Zirkcl, Ferdinand, "inserted substance "a 

 base, 37; originally furuicd products m 

 feldspar; 55, 50. 



[T?:'^^j-Tn 



