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 6
... pieces , in which the piston of the pump works , will be entirely corroded therewith in fix months ; and a great ex- pence and lofs of time will be incurred , if the pumps are not previously furnished with Brafs working pieces , as on ...
... pieces , in which the piston of the pump works , will be entirely corroded therewith in fix months ; and a great ex- pence and lofs of time will be incurred , if the pumps are not previously furnished with Brafs working pieces , as on ...
الصفحة 24
... piece of hard Stone in the ground , with abundance of common small pins of Brafs , interfperfed in and throughout the Stone , in such manner and form , that all those who faw it afterwards , were convinced , it was not done artificially ...
... piece of hard Stone in the ground , with abundance of common small pins of Brafs , interfperfed in and throughout the Stone , in such manner and form , that all those who faw it afterwards , were convinced , it was not done artificially ...
الصفحة 43
... piece of Copper Ore in the middle of it , almoft totally impervious , till fractured by the fledge . Again , there are large rocks of Copper Ore , fometimes found , in all appearance as if they were folid ; on breaking of which , a ...
... piece of Copper Ore in the middle of it , almoft totally impervious , till fractured by the fledge . Again , there are large rocks of Copper Ore , fometimes found , in all appearance as if they were folid ; on breaking of which , a ...
الصفحة 49
... piece of pure Iron where fresh broken : at other times it is found more compact and heavy , and of a very even texture , not granulated or compofed of any feparate Moleculæ , but resembling a dusky mass of melted Lead on the surface ...
... piece of pure Iron where fresh broken : at other times it is found more compact and heavy , and of a very even texture , not granulated or compofed of any feparate Moleculæ , but resembling a dusky mass of melted Lead on the surface ...
الصفحة 52
... It is diffolvable in Aqua Regia ; but a true Aqua Fortis makes no impreffion on it ; for if you put into it a piece of gilt Silver wire , whofe Silver is half a grain , a grain , and the Gold but one ninety - 52 OF METALS AND MINERALS ,
... It is diffolvable in Aqua Regia ; but a true Aqua Fortis makes no impreffion on it ; for if you put into it a piece of gilt Silver wire , whofe Silver is half a grain , a grain , and the Gold but one ninety - 52 OF METALS AND MINERALS ,
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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