NOMES XVIII. XIX. XX. 



51 



NOME XVIII. KERALITE, WITH CHLORITE. 

 [KUNKELITE, from Kunkel, A. D. 1660.] 



This combination often forms the green kera- 

 lite, one of the most pleasing appearances of 

 that substance. 



NOME XIX. SCHISTOSE KERALITE AND 

 SLATE. 



[ BOY LITE, from Boyle, A. D. 1660.] 



The colour is grey, of a greater or less ten- 

 dency to blue. 



NOME XX. SCHISTOSE KERALITE AND 

 LIME-STONE. 



[BECCHERITE, from Beccher, the great founder 

 of modern chemistry, whose Physica Subterranea 

 appeared at Frankfort, 1669-] 



This seems chiefly to happen where the pri- 

 mitive lime-stone joins the schistose keralite. 



