of the Pyrites. 49 



their fulphur thefe have a great affinity with each 

 other. And I have had a beautiful fample of 

 cinnabar-ore from Tranfilvania, where the pyrites^ 

 being quite of a fteely clofenefs, lay, within it, 

 like a kernel in a lhell. 



It may in general be faid, that the -pyrites is 

 to be met with in as different forms and pofition 

 as other ores are, Thefe are, 1. vein-wife \ when 

 the ore ftretches downwards, ofcner (loping a little, 

 feldom quite perpendicular ; and (till growing 

 wider or larger like a vein towards the heart. 

 2. Squat-wife •, or in a horizontal pofition ; that is, 

 if not always quite level, yet hanging much and 

 dipping a little. 3. ~N eft-wife or kidney -wife ; that 

 is, as fo many eggs or kernels in a kind of fliell, 

 thrown together at random •, without any parti- 

 cular connection, either with other ores, the ad- 

 joining veins, or among themfelves. 4. In ftream- 

 works -, which we may confider as fo many banks 

 or beds, caufed by the deluge •, they are found 

 fometimes fo very large, as to be called ftock-work 

 or bellies ; tho' by their extenfion, undoubtedly 

 belonging to the clafs of ' fquats or flat veins. 5. 

 In flioads, which are broken pieces or fragments 

 of rock and ftone, lying directly beneath the under- 

 turf earth, and at times, by rains and floods, left 

 quite naked; and with great violence, the effect 

 of the deluge, warned and tore away from the veins ; 

 at length they acquire the appellation, ftream- 

 work, when much ore and rock, thus fhoved or 

 pufhed away, happens to lie together in a large 

 compafs. 6. And laftly, a circumffance not the 

 lead remarkable, is, that ores are iound upon Jinter, 

 or drop-ftone, in the fides and roofs of old mines, 

 a proof of their temporary exiftence, and that they 

 are not coeval with the world. 



In all the above forms may the pjrites be 

 found. For, 1. It breaks in genuine conitant, ore - 



E veins . 



