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
... steam fire engine by Mr. Watt ; an invention of more confequence to the Mining intereft of Great - Britain , than any discovery that has been made for half a century ; and I hope to fee its univerfal use established in a very short time ...
... steam fire engine by Mr. Watt ; an invention of more confequence to the Mining intereft of Great - Britain , than any discovery that has been made for half a century ; and I hope to fee its univerfal use established in a very short time ...
الصفحة 154
... steam cock E 10 , being turned towards n , opens a pipe D to let in the steam ; and being turned towards O , it fhuts it out , that no more can enter . The pifton is now raised towards the top of the cylinder at C , and the cylinder is ...
... steam cock E 10 , being turned towards n , opens a pipe D to let in the steam ; and being turned towards O , it fhuts it out , that no more can enter . The pifton is now raised towards the top of the cylinder at C , and the cylinder is ...
الصفحة 155
... steam ; confequently the steam in the cylinder is reduced to part , when turned to water by the jet of cold water ; and therefore a fufficient vacuum is made in the cylinder , for the piston to defcend , unballanced , by the preffure of ...
... steam ; confequently the steam in the cylinder is reduced to part , when turned to water by the jet of cold water ; and therefore a fufficient vacuum is made in the cylinder , for the piston to defcend , unballanced , by the preffure of ...
الصفحة 156
... steam becomes ftronger than is required , it will lift up the valve , and go out this valve is called the Puppet - Clack . The fteam has always a variable ftrength , yet never one - tenth ftronger or weaker than common air ; for it has ...
... steam becomes ftronger than is required , it will lift up the valve , and go out this valve is called the Puppet - Clack . The fteam has always a variable ftrength , yet never one - tenth ftronger or weaker than common air ; for it has ...
الصفحة 157
... steam , is equal to the preffure of the air . When the fteam is one - tenth weaker than the air , the height T Y = three feet and a half . Now , fince the whole perpendicular distance from d to Y is but four feet , and the steam always ...
... steam , is equal to the preffure of the air . When the fteam is one - tenth weaker than the air , the height T Y = three feet and a half . Now , fince the whole perpendicular distance from d to Y is but four feet , and the steam always ...
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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