Mineralogia Cornubiensis: A Treatise on Minerals, Mines, and Mining: Containing the Theory and Natural History of Strata, Fissures, and Lodes, with the Methods of Discovering and Working of Tin, Copper, and Lead Mines, and of Cleansing and Metalizing Their Products; Shewing Each Particular Process for Dressing, Assaying and Smelting of Ores. To which is Added, an Explanation of the Terms and Idioms of MinersD. Bradford Barton Limited, 1778 - 331 من الصفحات |
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الصفحة 18
... feet below the furface , is altogether erroneous ; for if it does not enter into the bowels of the earth , what else should occafion fo vaft an increase thereof , at , or foon after , its difcharge from the clouds ? So apparent is this ...
... feet below the furface , is altogether erroneous ; for if it does not enter into the bowels of the earth , what else should occafion fo vaft an increase thereof , at , or foon after , its difcharge from the clouds ? So apparent is this ...
الصفحة 21
... feet of the fea ; whereby , in violent ftormy weather , the noise overhead has been fo tremendous , that the workmen have many times deferted their labour under the greatest fear , left the fea might break in upon them . This proximity ...
... feet of the fea ; whereby , in violent ftormy weather , the noise overhead has been fo tremendous , that the workmen have many times deferted their labour under the greatest fear , left the fea might break in upon them . This proximity ...
الصفحة 48
... feet wide , and in driving as many , not only the Mineral , but even the vein itself will be fcarce perceptible . We have not known any of this Mineral wrought more than fourteen fathoms deep . The Mine of Huel Boys above men- tioned is ...
... feet wide , and in driving as many , not only the Mineral , but even the vein itself will be fcarce perceptible . We have not known any of this Mineral wrought more than fourteen fathoms deep . The Mine of Huel Boys above men- tioned is ...
الصفحة 50
... feet breadth , which contained a branch of real Cobalt ; and it happening about the time when the Society of Arts , & c . offered a premium of thirty guineas for the beft Cobalt to be difcovered in England , he was honoured with the ...
... feet breadth , which contained a branch of real Cobalt ; and it happening about the time when the Society of Arts , & c . offered a premium of thirty guineas for the beft Cobalt to be difcovered in England , he was honoured with the ...
الصفحة 59
... feet wide , do iffue out fome fmall fprigs of little account , and yet here they refine thirty - eight millions five hundred thousand pounds weight of Silver yearly ; one pound of their Ore yielding one ounce of fine Silver , at which ...
... feet wide , do iffue out fome fmall fprigs of little account , and yet here they refine thirty - eight millions five hundred thousand pounds weight of Silver yearly ; one pound of their Ore yielding one ounce of fine Silver , at which ...
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عبارات ومصطلحات مألوفة
Adit adventurers affay alfo almoſt alſo anſwer Antimony Aqua Fortis becauſe beſt black Tin bottom buddle cafe calcination called caufe cauſe colour confequence confiderable Copper Cornwall courſe Cryſtal depth diffolved diſcovered diſcovery diſtance dreffing earth eaſily expence facks faid falts fame fathoms feet feldom feparated feven feveral fhall fhillings fhould fhovel fide Fiffures fink fire firft firſt fituation fize fmall folid fome fometimes foon fouth fteam ftrata ftratum fubject fuch fufficient funk fuppofe furface Goffan Gold ground hundred inches inftance Iron itſelf laft lefs leſs likewife Lode meaſure Metal metallick Mineral Mines moft moſt muft Mundick muſt neceffary obferved occafion particles perfons petrifactive pounds prefent purpoſe quantity raiſed reaſon Redruth refpect rich Semi-metals ſeparate Shaft ſhall Shode Silver ſmall ſome ſtate Stones thefe themſelves theſe thofe thoſe thouſand Tin-ftuff Tinners tons underlie uſed vein waſhed weft white Tin Whym