i 2 6 OF ORES AND COALS. 



The famous Mr. Boyl obferves, that about three tons of iron- 

 ftonc in fome iron-mines will yield one ton of metal. And on 

 the authority of Mathejius he informs us, that a little gold is not 

 unfrequently found in iron-ore fh} t 



We have forne iron-ftone and ore of a peculiar ftructure, figure, 

 and colour, deferving notice. 



.** 



1. A ponderous mafs, feven inches long, and thirteen inches 



over, in the thickeft part, grey, with fibrous fepta of black talc, 

 villofe and nappy, like velvet. From the fhore of North Tyne, be- 

 low Chipchace-rm\\. 



2. Of the fhape and fize of a carpenter's hand-plane, ponde- 

 rous. From the fhore of the brook below Simonbttrn-czRle. 



3. Very much refembling a Bonum Magrtum-plumb, with a fliort 

 ftem or pedicle ; one fide fmooth, the other tuberculofe and gra- 

 nulated, irregularly, but very neat. From the fliore of the brook 

 at Simonburn. 



c. llefembling half of a nectarine fplit in two, of a fine grain 

 or texture, a faint red, with uNeucleus, covered with a thin film or 

 flcin, tinged with yellow. From the fame fhore. 



5. Like the head of a fmall iron-bolt, broken off", with an ena- 

 mel of a copper-colour. 



(h) Ph, Tr. No. 19. 



Of the manner of making iron, fee Mufat de Fifica J?" de E.-.-pfrienze, See. by Senior 

 Boccone. 



6. Of 



