The Mining and Smelting Magazine, 1권The Office, 1862 |
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페이지
... Rocks , 183 ; Proceedings of the Geological Society of London , 188 ; Proceedings of Manchester Geological Society , 189 ; Discussion on Mr. Salmon's Paper read at the Society of Arts , 192 ; Review of Wemyss Reid's Per- sonal Narrative ...
... Rocks , 183 ; Proceedings of the Geological Society of London , 188 ; Proceedings of Manchester Geological Society , 189 ; Discussion on Mr. Salmon's Paper read at the Society of Arts , 192 ; Review of Wemyss Reid's Per- sonal Narrative ...
6 페이지
... rock strata , owing to a large number of coal seams being found associated with them . The coal measures are alternations of coal - beds , bands of iron - stone , layers of clay - shale , siliceous gritty rocks , and of sand - stone ...
... rock strata , owing to a large number of coal seams being found associated with them . The coal measures are alternations of coal - beds , bands of iron - stone , layers of clay - shale , siliceous gritty rocks , and of sand - stone ...
7 페이지
... rock can be removed , and the coal wrought by opencast , the working becomes exceedingly simple , being nothing more than quarry- ing out the coals . The difficulties associated with coal working are principally owing to the enormous ...
... rock can be removed , and the coal wrought by opencast , the working becomes exceedingly simple , being nothing more than quarry- ing out the coals . The difficulties associated with coal working are principally owing to the enormous ...
8 페이지
... ROCK FORMING THE ROOF AND FLOOR OF THE COAL SEAM . -Since the management of the superincumbent strata forms the chief difficulty in the working of seams of coal , it almost necessarily follows that any difference in the composition ...
... ROCK FORMING THE ROOF AND FLOOR OF THE COAL SEAM . -Since the management of the superincumbent strata forms the chief difficulty in the working of seams of coal , it almost necessarily follows that any difference in the composition ...
9 페이지
... rock , the difficulty and expense of supporting it in the main passage , and in the working places of the mine , will necessarily be very considerable ; and , to lessen this as much as may be practicable , the mode of working pursued ...
... rock , the difficulty and expense of supporting it in the main passage , and in the working places of the mine , will necessarily be very considerable ; and , to lessen this as much as may be practicable , the mode of working pursued ...
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accounts Amount arrastre Berehaven black tin calcination Camborne Caradon Carn Brea cent chasers Clifford Amalgamated coal coal-field collieries Company of Ireland considerable Consols containing Cook's Kitchen copper copper-smelting Cornwall cost deposits depth Devon district ditto dividend Dolcoath East Caradon East Carn Brea engine fathoms favourable feet Fowey furnace geological gold granite Grenfell and Sons Guanaxuato Herodsfoot improved inches Ireland shares iron Keates leaving credit balance Liverpool lode man-engine Marke Valley matter mercury Messrs metal Millstone Grit Mines Royal Mining Company month North North Downs operation present PRODUCE AND VALUE profit quantity quartz Redruth rocks Rosewarne seam shaft shale showed-Balance last audit silica Sims smelters smelting sold South Tolgus strata sulphide sulphur Swansea thickness tons torta trade Treloweth Treskerby veins Vivian and Sons Wales West West Tolgus Wheal Basset Wheal Busy Wheal Seton Wicklow Copper Willyams yards
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31 페이지 - PENROSE'S (FC) Principles of Athenian Architecture, and the Optical Refinements exhibited in the Construction of the Ancient Buildings at Athens, from a Survey. With 40 Plates. Folio. 61. 5s. PERCY'S (Jons, MD) Metallurgy of Iron and Steel ; or, the Art of Extracting Metals from their Ores and adapting them to various purposes of Manufacture. Illustrations. Svo. 42s. PHILLIPP (CHARLES SPENCER MARCH) On Jurisprudence. Svo. 12s. PHILLIPS' (JOHN) Memoirs of William Smith, the Geologist.
125 페이지 - HULL— COAL FIELDS of GREAT BRITAIN ; their History, Structure, and Resources ; with Notices of the Coal Fields of other parts of the World.
256 페이지 - Koy, the ice had apparently passed north-eastwardly, over the watershed, towards the Spey. In Knapdale, Argyllshire, similar evidence is obtained of a great ice-stream passing over hill and dale ; here falling into the Sound of Jura. The author referred to Rink's and Sutherland's observations on the continental ice of Greenland as affording a probable solution of these phenomena ; and, objecting to the hypothesis either of floating ice and of debacles being sufficient to account for the conditions...
112 페이지 - If such works were judiciously constructed with a view to future extension, their capacity might be doubled at an outlay of about 50 per cent, of the original cost. Fuel is the largest item of expenditure in copper-works, and consequently a situation where suitable and cheap coal can be obtained is of great importance. The quantity of coal consumed will vary much with its quality, and in a greater or less degree with the nature of the ores and the economy of management ; but it may be generally estimated...
179 페이지 - Carew's Survey of Cornwall ; to which are added, Notes Illustrative of its History and Antiquities, by the late Thomas Tonkin, Esq.
257 페이지 - Sweden, and North America.” By AC Ramsay, FRS, President of the Geological Society. The author first stated that in this memoir he proposed to extend his theory of the glacial origin of the smaller mountain-lakes of Wales and Switzerland (published in • The Old Glaciers of North Wales ‘) to those greater lakes of Switzerland which, like the tame above alluded to, lie in true rock-basins.
179 페이지 - Copper is found in sundry places, but with what gain to the searchers, I have not been curious to inquire, nor they hasty to reveal : for at one time (of which I took a view) the ore was shipped to be refined in Wales, either to save cost in fuel or to conceal the profit.
186 페이지 - ... undertaken on this subject have led me to results remarkable for the simplicity which they introduce into the history of igneous formations, and which, besides, being founded on experimental data, appear to me to agree perfectly with geological observations.
26 페이지 - Spain 1—52 250,000 Of the nine countries, India is thus already seventh on the list. What a future for America is involved in the fact that nearly a fourth of her whole area, as far as investigated, is covered with coal. India raises a third more than Spain, and about the same amount as Warwickshire. The consumption of coal in India and by vessels leaving its ports we may estimate at 700,000 tons annually, the amount imported in 1857 from England being 329,157 tons. Reckoning the price of Indian...
210 페이지 - The reason of this is, that every act which is done by a servant in the course of his duty is regarded as done by his master's orders, and consequently is the same as if it were the master's own act, according to the maxim, qui facit per alium facit per se.