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 MinersPrinted and sold for the author by J. Phillips, 1778 - 331 من الصفحات |
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الصفحة 21
... sea over the workmen , without their being incommoded by the falt Water , is more wonderful , than the account which Dr. Stukley gives , of his defcending into a coal pit at Whitehaven one hundred and fifty fathoms deep , till he came ...
... sea over the workmen , without their being incommoded by the falt Water , is more wonderful , than the account which Dr. Stukley gives , of his defcending into a coal pit at Whitehaven one hundred and fifty fathoms deep , till he came ...
الصفحة 22
... sea , entirely free from fuch Water . The fubmarine ftrata of our Mines , muft be totally impervious to any Waters , which fall into the fea . It cannot be otherwise . So that fuch parts of the Mines , are quite free of any Water ...
... sea , entirely free from fuch Water . The fubmarine ftrata of our Mines , muft be totally impervious to any Waters , which fall into the fea . It cannot be otherwise . So that fuch parts of the Mines , are quite free of any Water ...
الصفحة 35
... seas , that vessels new off the stocks , have been frightfully bored in their first voyage . Our county being altogether maritime , and the Mines being fituated in the most narrow part of it , between the two channels , many of our ...
... seas , that vessels new off the stocks , have been frightfully bored in their first voyage . Our county being altogether maritime , and the Mines being fituated in the most narrow part of it , between the two channels , many of our ...
الصفحة 70
... sea , which art a merchant of the people for many ifles . " ( Ezekiel ) . CC CC Jefus the fon of Sirach , the author of Ecclefiafticus , lived 247 years before Chrift . In fpeaking of Solomon's glory , chap . xlvii . verf . 18 , he fays ...
... sea , which art a merchant of the people for many ifles . " ( Ezekiel ) . CC CC Jefus the fon of Sirach , the author of Ecclefiafticus , lived 247 years before Chrift . In fpeaking of Solomon's glory , chap . xlvii . verf . 18 , he fays ...
الصفحة 84
... sea sand , and smooth beach pebbles . Two or three hundred fathoms from the fea , and about eighty fathoms above it , under this fand , is to be seen for five feet deep nothing but fuch beach Stones , as are usually washed on the sea ...
... sea sand , and smooth beach pebbles . Two or three hundred fathoms from the fea , and about eighty fathoms above it , under this fand , is to be seen for five feet deep nothing but fuch beach Stones , as are usually washed on the sea ...
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عبارات ومصطلحات مألوفة
Adit adventurers affay alfo almoſt alſo anſwer Antimony aqua fortis becauſe black Tin bottom buddle cafe calcination called cauſe colour confequence confiderable Copper Corniſh Cornwall courſe crucible Cryſtal cylinder depth diſcovered diſcovery diſtance dreffing eafily earth engine expence faid fame fathoms feet feparated feven fhillings fhould fhovel fide Fiffures fink fire firft firſt fituation fize fmall fmelting folid fome fometimes foon ftamping fteam ftones fuch fulphur funk fuppofe furnace Goffan Gold houſe hundred weight inches interfected Iron itſelf laſt leaſt lefs leſs likewiſe Lode meaſure Metal metallick Mineral Mines moft moſt Mundick muſt neceffary obferved perfon pounds preſent proceſs purpoſe quantity raiſed reaſon Redruth ſcoria Semi-metals ſeparate ſeveral Shaft ſhall Shode Silver ſmall ſome ſtate ſteam Stones Strata ſuch theſe thofe thoſe thouſand Tin Tin White Tin White Tin Tin-ftuff Tinners uſed vein waſhed waſte weft White Tin Tin Whym ΙΟ
مقاطع مشهورة
الصفحة 18 - On the proud crest of Satan, that no sight, Nor motion of swift thought, less could his shield, Such ruin intercept : Ten paces huge He back...
الصفحة 311 - The condenfer confifts of one or more pumps furnifhed with clacks and buckets, (nearly the fame as in common pumps) which are wrought by chains faftened to the great working beam of the engine. The pipe, which comes from the cylinder, is joined ;to the bottom of thefe pumps, and the whole condenfer ftands immerfed in a ciftern of cold water fupplied by the engine.
الصفحة 118 - The rod should be firmly and steadily grasped -, for if, when it has begun to be attracted, there be the least imaginable jerk or opposition to its attraction, it will not move any more till the hands are opened, and a fresh grasp taken. The stronger the grasp the livelier the rod moves, provided the grasp be steady and of an equal strength.
الصفحة 13 - All the rivers run into the sea, yet the sea is not full ; unto the place from whence the rivers came, thither they return again.
الصفحة 311 - The cylinder is fmaller than ufual, in proportion to the load, and is very accurately bored. In the moft complete engines it is furrounded, at a fmall diftance, with another cylinder, furnifhed with a bottom and a lid. The interftice between the cylinders communicates with the...
الصفحة 310 - He lias contrived to observe an uniform heat in the cylinder of his engines, by suffering no cold water to touch it, and by protecting it from the air, or other cold bodies, by a surrounding case filled with...
الصفحة 112 - Where metals ripen in vaft cakes of ore. Here, fullen to the fight, at large is fpread The dull unwieldy mafs of lumpifh lead. There, glimmering in their dawning beds, are feen 75 The light afpiring feeds of fprightly tin.
الصفحة 312 - Ib raifes the buckets of the pumps which are hung to the other end of the beam. The exhauftion regulator is now fhut, and the fteam one opened again, which, by letting in the fteam, allows the pifton to be pulled up by the fuperior weight of the pump rods; and fo the engine is ready for another ftroke.
الصفحة 46 - Essays, iv. p. 34. Pryce, in Mineral. Cornub., p. 49, says, " The late Dr. J. Lawson, observing that the flowers of lapis calaminaris were the same as those of zinc, and that its effects on copper were also the same with that semi-metal, never remitted his endeavours till he found the method of separating pure zinc from that ore.