214 September 1749. 



There are fometimes fmall pieces of a 

 greyifli quartz in this fpar, which emit 

 ilrong rparks of lire, when ftruck with a 

 fteel. Jn thefe kinds of ftone the lead .ox.e 

 is lodged. Jt commonly lies in little lumps 

 pf the iize of peas -, but fometimes ia 

 fpecks of an inch fquare, or bigger. The 

 ore is very clear, and lies in little cubes*. 

 It isigenerally very poor, a few places ex- 

 cepted. The veins of foft fpar, and other 

 kinds of ftone, are very narrow, and com- 

 monly from ten to fifteen inches broad. 

 In a few places they are twenty inches 

 broad -, and in one iingle place twenty- 

 two and a half. The brook which inter- 

 iedls the mountain tov^/ards the mills, runs 

 down fo deep into the mountain, that the 

 ?3i.ftance from the fummit of the hill, to 

 the bottom of the brook, is near twelve 

 yards. Here I examined the veins, and 

 found that they always keep the fame 

 breadth, not encreafmg near the bottom of 

 the brook; and likevvife, that they are no 

 licher below, than at the top. From hence 

 it m^y be eafily concluded, that it is not 

 worth while finking mines here. Of thefe 

 veins there are three or four in this neigh- 

 bourhood, at fome diftance from each other, 



* It is a cidic lead orCf or had glance. Forjler's Introd. 

 fo Mineralogy, p. 51. 



but 



