Records of Mining and Metallurgy: Or, Facts and Memoranda for the Use of the Mine Agent and SmelterSpon, 1857 - 304 pages |
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Page 29
... Wheal Friendship was an important copper mine as early as 1796. Not many years ago , the wonderful de- posits of Devon Consols were discovered , and numerous other workings in the same field have since been established . Elsewhere ...
... Wheal Friendship was an important copper mine as early as 1796. Not many years ago , the wonderful de- posits of Devon Consols were discovered , and numerous other workings in the same field have since been established . Elsewhere ...
Page 57
... Wheal Busy , near Chacewater , with cylinders respectively 72 and 66 inches in diameter . The consumption of coal by these two machines amounted to 320 bushels , or about 13 tons daily . In 1766 Smeaton's attention was occupied by ...
... Wheal Busy , near Chacewater , with cylinders respectively 72 and 66 inches in diameter . The consumption of coal by these two machines amounted to 320 bushels , or about 13 tons daily . In 1766 Smeaton's attention was occupied by ...
Page 59
... Wheal Prosper . The pressure of steam on the boiler of this engine was 40 fbs per square inch , and was cut off in the cylinder at one - tenth of the stroke . In 1810 , Woolfe introduced the working of high - pressure steam in a small ...
... Wheal Prosper . The pressure of steam on the boiler of this engine was 40 fbs per square inch , and was cut off in the cylinder at one - tenth of the stroke . In 1810 , Woolfe introduced the working of high - pressure steam in a small ...
Page 87
... Wheal Prosper , and since that period its use has not only become general in Cornwall , but also in London and the manufacturing districts . Where fuel is abundant an " egg - end " boiler is sometimes employed . Its form is that of a ...
... Wheal Prosper , and since that period its use has not only become general in Cornwall , but also in London and the manufacturing districts . Where fuel is abundant an " egg - end " boiler is sometimes employed . Its form is that of a ...
Page 88
... Wheal Rose , Mitchell's 85 - inch cylinder engine , 10 feet stroke , is fur- nished with four boilers , of the following dimensions : -- two 36 feet by 6 feet , one 38 feet by 6 feet , and one 34 feet by 6 feet ; weighing together 45 ...
... Wheal Rose , Mitchell's 85 - inch cylinder engine , 10 feet stroke , is fur- nished with four boilers , of the following dimensions : -- two 36 feet by 6 feet , one 38 feet by 6 feet , and one 34 feet by 6 feet ; weighing together 45 ...
Autres éditions - Tout afficher
Records of Mining and Metallurgy: Or, Facts and Memoranda for the Use of the ... John Arthur Phillips,John Darlington Affichage du livre entier - 1857 |
Records of mining and metallurgy; or, Facts and memoranda for the use of the ... John Arthur Phillips Affichage du livre entier - 1857 |
Records of Mining and Metallurgy: Or, Facts and Memoranda for the Use of the ... John Arthur Phillips,John Darlington Aucun aperçu disponible - 2018 |
Expressions et termes fréquents
acid aforesaid agent alloy aluminium amount apparatus assay average boiler borax bottom buddle button carbonate Cardiganshire cast iron cent coal collieries Consols contained copper Cornish Cornish engine Cornwall cost cost-book crucible cubic feet cupellation cwts cylinder depth Devon diameter Ditto divided dividend East Wheal effected employed engine evaporated fathoms flues fuel furnace gallons given gold Grantors heat hereby granted horse-power John Miners kibble lead length lever limits Lisburne litharge lodes machine machinery means metal minerals mines minute multiply notice number of strokes obtained operation period piston Poldice pounds pressure produce proportion pump purpose purser quantity quotient radius rod regulations revolutions per minute rope shaft shareholders shares silver Slag slime South Wheal square inch steam STOCK COMPANIES ACT stuff sulphur superheating surface temperature thereof Tons of Copper tutwork valve velocity vesicular water weight West Wheal wheel whilst
Fréquemment cités
Page 213 - In case of an equality of votes, the Chairman shall have a casting vote.
Page 210 - ... it shall be lawful for the said lessor at any time thereafter into and upon the said demised premises or any part thereof in the name of the whole to re-enter and the same to have again re-possess and enjoy as of his or their former estate anything hereinafter contained to the contrary notwithstanding.
Page ix - Son of man, the house of Israel is to me become dross: all they are brass, and tin, and iron, and lead, in the midst of the furnace ; they are even the dross of silver.
Page 24 - The manner of the carriage is by laying rails of timber, from the colliery, down to the river, exactly straight and parallel ; and bulky carts are made with four rowlets fitting these rails ; whereby the carriage is so easy that one horse will draw down four or five chaldron of coals, and is an immense benefit to the coal merchants.
Page 10 - It is drawn, and cometh out of the body; yea, the glittering sword cometh out of his gall: terrors are upon him.
Page 300 - COTTON CULTIVATION.— Cotton Cultivation in its various details, the Barrage of Great Rivers, and instructions for Irrigating, Embanking, Draining, and Tilling Land in Tropical and other Countries possessing high thermometric temperatures, especially adapted to the improvements of the cultural soils of India, by Joseph Gibbs, Member Institute Civil Engineers, with 5 plates, crown 8vo, cloth, 7s.
Page 24 - Beaumont, a gentleman of great ingenuity and rare parts, adventured into our mines with his thirty thousand pounds ; who brought with him many rare engines not known then in these parts ; as the art to boore with iron rodds, to try the deepnesse and thicknesse of the coale ; rare engines to draw water out of the pits ; waggons with one horse to carry down coales from the...
Page 300 - This little volume should become the hand-book of every person whose duties require even occasional calculations of this nature ; were it only that it is more extensively applicable than any other in existence, we could cordially recommend it to our readers, but when they learn that the use of it involves only half the labour of all other Tables constituted for the same purpose, we offer the strongest of all recommendations, that founded on the value of time."— Mechanics