loo 



OF STONES. 



adfy. Of a yellowifli-white ground, thick fet with concretions 

 of different degrees of red, and a reddifh-brown, from the fize 

 of a pin's head to that of a pea, in a diftinct and beautiful dif- 

 pofition. 



Thefe curious -and beautiful flones owe their colours to metaK 

 line admixtures and tinges. 



CHAP. 



