j% The !hQatural Hiflory 



album, as isfaid by the fame Kentmannws, Efflorefcere e pyrite Gof- 

 lariano, is 1 Radebergenfi z . 



13. Next to thefe, in order of nature as well as dignity, comes 

 the filver Marchafite under confideration, of a white gliftering 

 colour, and to be had in the bottom of the River between Clif- 

 ton and Burcot : this ftrikes fire as well as the golden Pyrites, but 

 notwithftanding itwasexpofed in the fitted places, yet would 

 never, that I could perceive, fend forth any efflorefcence. An- 

 other fort of them I met with at Deddington, taken out of the 

 afore-mentioned 7^r Well there, of as glorious a colour as 

 the former ; but feveral times tryed on the belt. Steel I could get, 

 would never yield the leaft fpark of fire : whence I rather con- 

 cluded it to be argentum felium, or Cat -filver, but that it would 

 not (bine in the dark, or confume in the fire : However, it may 

 pafs for a fferik nitidum, fo often mentioned by Naturalifis, it 

 being a glorious nothing, of no kind of ufe. 



14. That Flints, Pebbles, and Sands, are alfo Pyrites, needs 

 no further evidence than that they ftrike fire, a thing fo obvious 

 to the meaneft Obferver, that to fpend time to prove it, would 

 be loft time to the Reader ; it (hall fuffice therefore to enumerate 

 the feveral kinds of each, and chiefly to infift upon fuch as have 

 ufes. 



15. All along the Cbiltern Country of Oxford-fiire, Flints 

 areas plentiful as any where elfe ; amongft them the black one, 

 wellpolifh'd, will fupply the place of the Lydianftone ; and at 

 Henly they ufe them in making of Glafs, of which more anon in 

 the Chapter of Arts. They are found befide of divers other co- 

 lours, and fomeofthem h tranfparent, that they feem not only 

 to imitate, but to be the very fame with Achats. I have one, 

 found at Dorchefter, about an inch and half fquare, of zflejhco- 

 louri and fo tranjfarent, that it may well enough deferve the 

 name of Sardachates. Such as this were alfo (hewn me, by the 

 truly Ingenious, the Right Honorable James Lord Norreys of i?i- 

 cot, and found, as I think his Lordfhip told me, fome where 

 thereabout, and are I do not queftion the very fame (tones, that 

 Kentmannm a indeed places in his Title of Flints, yet calls them, 

 Pellucentes Sard<z colore. 



16. Of Pebbles there are fome alfo transparent, to be had a- 



'lit. 2- cap. Sory, & dejuccisefflorefient. Kentmm- tit 8. 



bout 



