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 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 Brass 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 Brass working pieces , as on ...
الصفحة 24
... piece of hard Stone in the ground , with abundance of common fmall pins of Brass , interspersed in and throughout the Stone , in fuch 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 fmall pins of Brass , interspersed in and throughout the Stone , in fuch 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 , sometimes 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 , sometimes 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 refembling a dusky mafs of melted Lead on the furface ...
... 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 refembling a dusky mafs of melted Lead on the furface ...
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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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.