8 4 OF STONES. 



them, at one corner, a figure like a fhrub, of a ycllowifh- 

 white. 



1 have a brown piece from Walker colliery, near Neivcajlle, with 

 many crafts, the furface villofe or nappy like velvet, glofly and 

 mining when held up to the light. 



That fort called OJteocolla, from os-'tov, Os, and xox\a, Gluten, is 

 often lying on the fliore of the brook at Simonburn, after floods. 

 It is fo like an olTeous fubftance, that it is often taken for the 

 bone of fome animal by thofe that do not know it. It is in re- 

 putation for fractures and broken bones, powdered and taken 

 inwardly in milk, bread, an electuary, or in the common diet, 

 till the cure is compleated ; being faid to expedite exfoliation, 

 and to generate a ftrong and firm callus (a). 



Spar is folvent by acid Menjlrua. 



We have Pfeudo-CryJlal from the lead mines at Allen-Heads of 

 various figures and colours. 



i . Cubic, which mews all the colours of the Rainbow. 



2. Of the fame form, with a ycllowim tinge, owing to Lead. 

 \Ve have it alfo teflellated. 



3. Rhomboidal, of a beautiful purple, owing to Iron. We have 

 it alfo with 



4. Multangular, and pointed, of a fea-green, owing to Copper. 



5-. Six fided or hexogonal cryflal, with large and beautiful 

 pyramids, of a diamond luilre. 



(a) Ph. Tr. No. 453. 



We 



