Mineralogia CornubiensisРипол Классик, 1778 - 331 من الصفحات |
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الصفحة
... last century, 'vast quantities of rich Copper Ore 'm Cornwall Were thrown away as useless! Indeed, it may be safely said, that eleven.twelfthe of his Majefly's subjecte are totaliy unacquainted with any part or branch os our enguiry ...
... last century, 'vast quantities of rich Copper Ore 'm Cornwall Were thrown away as useless! Indeed, it may be safely said, that eleven.twelfthe of his Majefly's subjecte are totaliy unacquainted with any part or branch os our enguiry ...
الصفحة
... last chapter of this book treats of Darn s, Dialling, and Levelling, with practical instances and remarlis, supported by experience, and altogether necessary. The fourth book treats os the several manuductions used in dressing oF Tin ...
... last chapter of this book treats of Darn s, Dialling, and Levelling, with practical instances and remarlis, supported by experience, and altogether necessary. The fourth book treats os the several manuductions used in dressing oF Tin ...
الصفحة
... last and grand object, is the manusactor of Tin and Copper Ores into their respective Metals 5 and l have set sorth, as succinctly and clearly as the materials I have obtained would allow, the processes os smelting and metallizing those ...
... last and grand object, is the manusactor of Tin and Copper Ores into their respective Metals 5 and l have set sorth, as succinctly and clearly as the materials I have obtained would allow, the processes os smelting and metallizing those ...
الصفحة
... last fifty years, zi. Profit and loss in the Mines like political gaming, grii. Caleulation that the nett profit upon £400,ooo is not 5453- cent. -The Lorda OF the Mines the greatest gainers, xiii. Reflections upon the pressure OF the ...
... last fifty years, zi. Profit and loss in the Mines like political gaming, grii. Caleulation that the nett profit upon £400,ooo is not 5453- cent. -The Lorda OF the Mines the greatest gainers, xiii. Reflections upon the pressure OF the ...
الصفحة x
... last two farms in queen Anne's reign, and the beginning of George the full, that Block-Tin, one year with another, amounth to something more than sixteen hundred z so that, in the s ce of one hundred and ten years, its mean proportion ...
... last two farms in queen Anne's reign, and the beginning of George the full, that Block-Tin, one year with another, amounth to something more than sixteen hundred z so that, in the s ce of one hundred and ten years, its mean proportion ...
المحتوى
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22 | |
The corpuſcular philoſophers accomlſtzfor it ſlang | 118 |
Of the Sumph or finiſ of the Mind which ſhould be in | 170 |
Inſtancesef the mortiferous effects oſ Damps 200 | 199 |
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 |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
Adit almoſt alſo anſwer Antimony becauſe bottom called caſe cauſe colour conſequence conſider conſiderable Copper Cornwall courſe Cryſtal depth deſcribed different diſcovered diſſolved diſtance dreſſing driſt earth eaſily eaſt effect eſpecially Eſq expence fathom feet fifty find fine fire firſt Fiſſures five fix Gold Goſſan graſs horſes houſe hundred inches inſtance Iron itſelf laſt leaſt leſs likewiſe Lode loſs meaſure Metals Mineral Mines Minos moſt Mundick muſt neceſſary obſerved off perſon pounds preſent proceſs purpoſe quantity raiſed reaſon Redruth reſpect riſe ſaid ſalt ſame ſay ſea ſee ſeems ſeen ſeldom ſeparate ſerve ſet ſeven ſeveral Shaft ſhall Shaſt ſhillings Shode ſhort ſhould ſide ſince ſink ſix ſmall ſolid ſome ſometimes ſoon ſor ſorts ſound ſouth ſquare ſtanding ſtate ſteam ſtone Stones ſtrata ſubject ſubſtance ſuch ſufficient ſunk ſuppoſe ſurſace themſelves theſe thoſe thouſand uſe uſually vein waſhed waſte weſt White Tin whoſe