90 



A VOYAGE TO 



1776. Canary Iflands, the Cape of Good Hope, and at this place 



December. • n ■> • \ n r 1 ,- V, 



ADOEher brownilh brittle itone forms here fome coniider- 

 able rocks ; and one which is blacker, and found in de- 

 tached pieces, inciofes bits of coarfe quartz. A red, a dull 

 yellow, and a purplilh fand-ftone, are alfo found in fmall 

 pieces ; and pretty large lumps of femi-tranfparent quartz, 

 difpofed irregularly in polyedral pyramidal cryflals of long 

 fhining fibres. Some fmall pieces of the common fort are 

 met with in the brooks, made round by attrition ; but none 

 hard enough to refifl: a file. Nor were any of the other 

 ftones acfted on by aqua fortis, or attracted by the magnet. 



Nothing, that had the lead appearance of an ore or me- 

 tal, was feen." 



CHAP. 



