181 



TAB. CXCVI. 



These specimens are from Salisbury Craigs, Edinburgh, 

 and show the conical wheel-like formation nearly in per- 

 fection, but very small. I have, therefore, greatly magni- 

 fied the right-hand outline, which shows a narrow primitive 

 edge, bounded by two lines. A similar crystallization is 

 found at Kings Park, Edinburgh. 



The lower sort I have from Frisky Hall, near the banks 

 of the Clyde, about three miles from Glasgow ; and also 

 from Arthur's Seat, Edinburgh. It shows abroad primitive 

 face on the edge of the crystals, bounded by two acute 

 ridges, which are placed very confusedly on the speci- 

 mens. 



The Right Hon. Charles Greville has in his collection a 

 specimen from Dauphine with crystals, not much unlike 

 the magnified left-hand bottom figure } in size and colour,, 



