Mineralogia CornubiensisРипол Классик, 1778 - 331 من الصفحات |
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الصفحة viii
... expence in the working, do for the most part reward the adventurers with very ample gain. It should, therefore, seem eligible to bestow our attention on those skin-deep adventures, preferably to the deep Mines; but this is by no means ...
... expence in the working, do for the most part reward the adventurers with very ample gain. It should, therefore, seem eligible to bestow our attention on those skin-deep adventures, preferably to the deep Mines; but this is by no means ...
الصفحة ix
... expence in the minerallick manufactory thereof : but as it affordsso considerable an employment for-the children of poor labourers, from six years old and upwards, they are generally engaged in that-brangh before they commence ...
... expence in the minerallick manufactory thereof : but as it affordsso considerable an employment for-the children of poor labourers, from six years old and upwards, they are generally engaged in that-brangh before they commence ...
الصفحة 16
... expence, disappointrmnt, and loss. 0111- Very deep Mines are subject to Waterv from both the sources before mentioned ; for in the driest seasons we know os, they have a constant stream 'ab interno, which requires much expence and ...
... expence, disappointrmnt, and loss. 0111- Very deep Mines are subject to Waterv from both the sources before mentioned ; for in the driest seasons we know os, they have a constant stream 'ab interno, which requires much expence and ...
الصفحة 29
... expence and labour For Limestone, which is now imported from Wales and Devanshire 5 besides the cheap and ready manure they would afford, for the cultivation os our land. Plain Crystal hardens into any figure, of which. its' own ravity ...
... expence and labour For Limestone, which is now imported from Wales and Devanshire 5 besides the cheap and ready manure they would afford, for the cultivation os our land. Plain Crystal hardens into any figure, of which. its' own ravity ...
الصفحة 34
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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