The Metallurgy of Lead: Including Desilverization and CupellationJ. Murray, 1870 - 567 páginas |
Otras ediciones - Ver todas
The Metallurgy of Lead: Including Desilverisartion and Cupellation John Percy Sin vista previa disponible - 2018 |
The Metallurgy of Lead: Including Desilverization and Cupellation (Classic ... John Gercy Sin vista previa disponible - 2017 |
Términos y frases comunes
Abstrich alloy Alumina antimony argentiferous arsenic assay baryta Berthier blast blast-furnace Bleiberg bottom calcined carbonic acid cast-iron centners charcoal charge chloride of lead coal colour composition cooling copper crucible crystals ctrs cupellation cwts desilverized dwts experiments fire-bridge Flintshire Flintshire furnace flue formed Freiberg fuel fume fusible fusion galena grains grey-slag hearth hearth-bottom hydrochloric acid lead containing lead heated lead-regulus lead-smelting lime liquid litharge loss of lead melted metallic lead Mines mixture molten obtained operation ore-hearth oxide of iron oxide of lead Oxide of zinc oxygen Pattinson Pontgibaud portion powder proportion protoxide of iron protoxide of lead quantity of lead red-lead reduced regulus residual reverberatory furnace rich roasted sesquioxide side silicate silver skimmed slag smelters smelting soda solution sulphate sulphate of baryta sulphide of lead sulphuric acid surface tap-hole tapped temperature tons twyer weight white-lead yield of lead zinc
Pasajes populares
Página 174 - The bellows are burned, the lead is consumed of the fire; the founder melteth in vain : for the wicked are not plucked away. Reprobate silver shall men call them, because the Lord hath rejected them.
Página 17 - Gennesareth, &c. A Canoe Cruise in Palestine and Egypt, and the Waters of Damascus.
Página 567 - BIGG-WITHER (TP). Pioneering in South Brazil; Three Years of Forest and Prairie Life in the Province of Parana.
Página 16 - LIVINGSTONE'S LAST JOURNALS. The Last Journals of David Livingstone in Central Africa, from 1865 to his Death. Continued by a Narrative of his Last Moments and Sufferings, obtained from his Faithful Servants Chuma and Susi.
Página 121 - ... cooled below its point of fusion, by which the metal is obtained in a state of minute subdivision. In doing this, he was struck with the circumstance, that, as the lead cooled down to nearly its fusing point, little particles of solid lead made their appearance, like small crystals, among the liquid...
Página 122 - After observing this phenomenon once or twice, he began to conceive that possibly some difference might be found in the proportions of silver held by the part that crystallized, and the part that remained liquid. Accordingly, he divided a small quantity of lead into two portions, by melting it in a crucible...
Página 124 - ... in some measure retained by shutting the ash-pit door. Above the centre of this line of pots, at the height of six or eight feet, it is convenient to have a small iron railway, with a frame or carriage on four wheels to move backwards and forwards the whole length of the range of pots, from which is to depend a chain, terminated by a hook at the bottom, and reaching to nearly the top of the pots. This is for the purpose of more easily conveying the ladles filled with crystals from pot to pot.
Página 567 - The Cathedral: its Necessary Place in the Life and Work of the Church.
Página 211 - The use of crucibles (/dai-oi), bellows, cavities of some peculiar sort (X&UIM), perhaps chimneys, great variety of carbonaceous fuel, the power of purifying and alloying, and knowledge of the properties of alloys, appear quite conspicuous among the ancient arts. The inscriptions* on these masses of lead are in the same general form as the ' marks' of the different mines now in work, and which, no doubt, are their literal and lineal descendants.
Página 122 - ... phenomenon once or twice, he began to conceive, that possibly some difference might be found in the proportions of silver, held by the part that crystallized, and the part that remained liquid. Accordingly, he divided a small quantity of lead into two portions, by melting it in a crucible, and allowing it to cool very slowly with constant stirring, until a considerable quantity crystallized, as already mentioned, from which the remainder, while still fluid, was poured off. An equal weight of...