. 



OF STOKES. 75 



<Jthly. Purple, variegated with an orange-yellow. From the 

 more of the brook at Gofton. 



. Of a bright fcarlet ; the mafhes like fine lace-work ; the 

 heads of the coralloids refembling in their compartments the 

 fcarlet tubercles of the cup-mofs. From the more of the brook 

 below Simon&urn-ca.R.\. 



Thefe all have reticular ridges, and prominent ftellar ftrise in 

 their perfect ftate, before they are worn and fmoothed by the 

 currents ; and the red kinds commonly have a congeries of fmall 

 chryftals on fome part of the furface. Thofe that have their 

 tubes filled with a red fubflance, and are tinged with the fame 

 colour, have fometimes an inveftient, ftellate cruft, very beau- 

 tiful. Such incruftations are not unfrequent on rubble-ftones, 

 in which fmall mafles of coralloid port are fometimes included, 

 very fine. Nodules of free-flone are fometimes found on the 

 fame mores compofed of columns, and have fmall apices in the 

 center of the mafties, but have no flars. 



Coralloid-marmorites, both with large and with fmall, con- 

 cave ftars, variegated with a light and dark grey, arc frequent 

 on the fhore of the brook at Simonburn, above the bridge, turned 

 out of the banks of blue clay, which abound with marine re- 

 mains. Thofe with large flars are fometimes found with their 

 columns in relief on the under fide ; of which I have a very fine 

 fpecimen, in its argillaceous lively. They arc both capable of 

 an excellent polifh, and may be had in large mafles. 



Marble has fpar for its bails, and fermems with acids. Cal- 

 cined, it is faid to yield a Phofphorns, which being held one mi- 

 nute in the light, becomes luminous when removed into a dark 

 place. . It is not fufible perfe. 



L 2 A variety 



