Mineralogia Cornubiensis

الغلاف الأمامي
Рипол Классик, 1778 - 331 من الصفحات

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The various Manuductions uſed in dreſſing of Cozfer and Lead Ores and Sampling Copper Ores for S
239
Drefliug of Lead Ore nearly the ſinne as Copper 243
245
and tracting 249 How to diſcover the contents of a Mineral
253
elncidatedhMethodto try the firſt ſoortia ſhe Silverexplained
259
of a ton oſ Copper Ore by the aſſay 264 26 5 266 To aſſay
271
and repeated ſmeltings therein 274 Of the Metal calciner
279
charging fluxing and tapping the ſurnaceSizing the ſcoria
285
Of ſelling or barteririg black Tin for whitÞForm of a Tin bill
292

BOOK
214
Pitwor s and ſhimpings 223 Of the crop and rough Tin
231
CHAP
318

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