Pyritologia: or, A history of the pyrites, the principal body of the mineral kingdom .. . olour chiefly, if not al-ways, from the iron fuch ores happen to contain :moreover, there is no one fort of copper-ore, thatremains untouched by the magnet. (5.) I might here alfo alledge thofe fcoria?,which, in copper-ore proofs for filver, always arifedark and black; whereas, doubtlefs, had therebeen no iron, the colour would prove of a liver, abrown-red, even to a high-red call, the propercolour of copper: for though lead, without whichno incoclion, or fcorification, can poflibly be made,mould happen t
Pyritologia: or, A history of the pyrites, the principal body of the mineral kingdom .. . olour chiefly, if not al-ways, from the iron fuch ores happen to contain :moreover, there is no one fort of copper-ore, thatremains untouched by the magnet. (5.) I might here alfo alledge thofe fcoria?,which, in copper-ore proofs for filver, always arifedark and black; whereas, doubtlefs, had therebeen no iron, the colour would prove of a liver, abrown-red, even to a high-red call, the propercolour of copper: for though lead, without whichno incoclion, or fcorification, can poflibly be made,mould happen to mix with it, yet it could notentirely deftroy the original colour of the copper; as in the Pvrites. in as little as it does the black caft of the fcori^ofiron-pyrites, though it bring them fomewhat nearerto a brown. I (hall leave to further reflection thevitrification I performed, without additions, in aglais furnace •, where, both from copper-ore, thecommon pyrites, pure fulphur-pyrites, and the ar>ienical, as the mifpickel, and mock-lead, I ufuallyprocureda black, dark CHAP, ( H2) CHAP. VII. Of the Co p p e r in the P y r i t e s. NEXT to the iron, the principal metallicearth to be looked for, and met with in thepyrites, is copper. Pyrites is never without iron,often without copper, which, next to iron, pyritesmoft affects, and which, of all other metals, isthe neareit allied to iron -y as may appear from thefollowing remarks, (i.) I own there is no expe-riment extant to afcertain the tranfmutation of ironinto copper, though a great deal has been faid tothat purpofe; the error having, at lead, arifenfrom the vitriolic waters of Hungary, wherein aprecipitation, rather than a tranfmutation of cop-per happens by means of iron. As Lohneifs *mentions the like to happen at the Rammelfberg;and the late M. Heineman, infpeclor at Botten-dorf, made an ingenious imitation to that purpofe ;and I myfelf, but lately, to my great fatisfa&ion,in the tin flock-work at Altenberg
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Keywords: ., bookcentury1700, bookdecade1, booksubjectmineralogy, bookyear1757
