Mineralogia CornubiensisРипол Классик, 1778 - 331 من الصفحات |
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الصفحة
... 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 times ...
... 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 times ...
الصفحة viii
... fifty sathorns' deep; and it is absolutely certain, that Copper is not often wrought in great abundance, till as't that depth, to an hundred sathoms or more. It is also a ihct, that molt Mines with us, both of Tin and Copper, being ...
... fifty sathorns' deep; and it is absolutely certain, that Copper is not often wrought in great abundance, till as't that depth, to an hundred sathoms or more. It is also a ihct, that molt Mines with us, both of Tin and Copper, being ...
الصفحة xi
... fifty pounde. From '736 inclufive to the end os 1745, fiventy>fiw= thousand fire. hundred and Went) time OF Copper Or: were fold an: fer-ten pound: eight filling' and fixpcnce averag'e price, the amount five finndred alid six thousand ...
... fifty pounde. From '736 inclufive to the end os 1745, fiventy>fiw= thousand fire. hundred and Went) time OF Copper Or: were fold an: fer-ten pound: eight filling' and fixpcnce averag'e price, the amount five finndred alid six thousand ...
الصفحة xiii
... fifty thousand pounde, which is only a profit of oneeighth upon the certain risk of so large a sum : but those who are convex-sent in Mining, we are well assured, would he very happy is th could promise themselves only seven blank: to ...
... fifty thousand pounde, which is only a profit of oneeighth upon the certain risk of so large a sum : but those who are convex-sent in Mining, we are well assured, would he very happy is th could promise themselves only seven blank: to ...
الصفحة xv
William Pryce. An Account of all the Copper Ores sold in Cornwall the last fifty Years; their Tonnage, Ammmt, Price, and Valuc. . . Averagc Average Dare Yea? glFtOAveglge Amount Annual Animal onnag nce 1? on Tonnage Amount 1726 - 6 . "35 ...
William Pryce. An Account of all the Copper Ores sold in Cornwall the last fifty Years; their Tonnage, Ammmt, Price, and Valuc. . . Averagc Average Dare Yea? glFtOAveglge Amount Annual Animal onnag nce 1? on Tonnage Amount 1726 - 6 . "35 ...
المحتوى
i | |
x | |
1 | |
5 | |
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