O F* S'-.T ONES. 93 



bouring hills. I have picked up fome, large and fine, by the 

 road-fides on a rainy day, being then moft eafily diftinguiflied 

 from other ftones. I have feen fome cut into feals, very hand- 

 fome, in the pofTeffion of Mrs. Selby, of Pa/ion. 



We have a grey agate, with large blotches of a florid red, in 

 great plenty in the hilly grounds on the weft lide of Carbarn, by 

 the Tweed, many of them turned up by the fpade in hedge-bot- 

 toms, and others warned down by torrents to the fliore of that 

 river. There is a variety of it ftreaked with red and white, re- 

 fembling at a diftance a piece of bacon. There is another variety 

 mottled with white, on a grey ground. Thefe are all fubject to 

 flaws. 



Agates yield no Phofphorus. . 



Jafpers of an uniform -ftructure, with no feparate concretions, 

 are not unfrequent ; of which I have the following forts. 



1. A deep green jafper, elegantly variegated with a gold-yel- 

 low fp). It is of a roundim fhape on one fide, and flattifh on the 

 other ; of a firm and compact texture, and a polite furface, 

 three inches in diameter. It is a moft beautiful ftone. From the 

 more of North Tyne^ by the Strotber-houfe, below Cbipchact-mill. 



2. A jafper of a pea-green colour, variegated with a light yel- 

 low. It is of a flattiih fhape, and of a flinty texture. 



3. A jafper of an olive-green colour, with dendrit* or arbufcu- 

 lar delineations of a bluilh-black, very beautiful. 



4. A blue jafper, variegated with a light and deep yellow. 



(p) Jafpis duriflima viridi-flavefcens. Nephriticus fubflava authorutn. Hill. Hift. FofH 

 p. 578. No. 5. 



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