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 3
... action without change . Indeed the oftener it has been in the fire the more refined and purer it becomes . One method of testing the quality of gold is by the application of fire , of which it ought to take not only the colour , but to ...
... action without change . Indeed the oftener it has been in the fire the more refined and purer it becomes . One method of testing the quality of gold is by the application of fire , of which it ought to take not only the colour , but to ...
Page 6
... action , together with that absorbed by the cupel itself , would , on being melted with a reducing - agent , yield pure , or nearly pure lead . It is therefore probable the author intends to convey the idea that three parts of litharge ...
... action , together with that absorbed by the cupel itself , would , on being melted with a reducing - agent , yield pure , or nearly pure lead . It is therefore probable the author intends to convey the idea that three parts of litharge ...
Page 17
... action these substances , with the exception of the nitre , could have on the purification of silver and gold , and we may * Hippocrates de Diæta , 193 . therefore conclude , that the action of the air was HISTORICAL NOTICE . 17.
... action these substances , with the exception of the nitre , could have on the purification of silver and gold , and we may * Hippocrates de Diæta , 193 . therefore conclude , that the action of the air was HISTORICAL NOTICE . 17.
Page 18
... action of the air was , after all , the chief means of oxidation employed . * In Britain , silver mines were worked before the invasion of the island by the Romans , and gold must also have been well known to the inhabitants before the ...
... action of the air was , after all , the chief means of oxidation employed . * In Britain , silver mines were worked before the invasion of the island by the Romans , and gold must also have been well known to the inhabitants before the ...
Page 46
... action of a counterpoise weight ; whilst in the latter the piston is impelled in both directions by the force of a column of water . Sometimes , also , instead of one , two single- acting cylinders are employed , the piston rods being ...
... action of a counterpoise weight ; whilst in the latter the piston is impelled in both directions by the force of a column of water . Sometimes , also , instead of one , two single- acting cylinders are employed , the piston rods being ...
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