Elements of the Art of Assaying Metals |
Other editions - View all
Common terms and phrases
Acid Afhes alfo almoft alſo Antimony APPARATUS Aqua Fortis Arfenick Aſhes becauſe befides Bifmuth Bodies Borax Bottom brittle Cafe calcined Calx Caput Mortuum Cavity Centner clofe cloſe Coals Colour confifts confumed Copper Crucible Cryſtals Cucurbite diffipated diffolved docimaftical eafily Earth efpecially expofed faid faline fame Manner fecond feparated ferves feveral fhall fhould fhut Fire firft firſt fixt Flux fmall folid fome fometimes foon foregoing ftill ftir ftrong fuch fufficient fufible Fufion Furnace Glaffes Glafs Gold granulated Hole Inches increaſe Inftance Iron itſelf laft Lead leaft lefs likewife Litharge Lute Mafs melted Mercury metallick Metals Minerals mixt Mixture moft moſt Muffel muft muſt neceffary Nitre obferved Operation Phlogifton Plat Powder precipitated Proc Procefs pure Pyrites red-hot refractory reft Regulus remaining Roafting Salt Scholion Scoria Semi-Metals Silver ſmall Stones Sublimation Sulphur Teft thefe theſe thofe thoſe Ufe and Reafons unleſs uſe Veffel Vitriol Water Weight yellow Zink
Popular passages
Page 453 - Lipsiae, 1734, in three tomes, in folio : in the second and third tomes of which he has given the best accounts, not only of the methods and newest improvements in metallic works in all places beyond the seas, but also of those in England and our colonies in America, with draughts of the furnaces and instruments employed. It is to be wished we had extracts of this work in English.
Page 323 - The heat of the metal of the first gun drove so much damp into the mould of the second, which was near it, that as soon as the metal was let into it, it blew up with the greatest violence, tearing up the ground some feet deep, breaking down the furnace, untiling the house, killing many spectators on the spot, with the streams of melted metal, and scalding many others in a most miserable manner.
Page 77 - Inches diftant from each other, to faften the Lute with which the Furnace is to be covered over within. 8. Let then an iron, moveable, hollow, quadrangular Pyramid (q) three Inches high, be adapted to the upper Aperture (d) of the Furnace at the Bafis feven Inches broad, ending upwards in a hollow Tube (r) three Inches in Diameter, two Inches high, almoft cylindrical, though fomewhat convergent at Top.
Page 455 - The second teacheth the art of dialling and levelling grooves a thing greatly desired by all miners being a subject never written on before by any, with an explanation of the miners' terms of art used in this book.
Page 454 - America; with draughts of the furnaces and instruments employed. It is to be wished we had extracts of this work in English. So industrious are the Swedes in improving themselves in the art of Metallurgy, that they send young gentlemen yearly to travel, not only all over England, but all over Europe, to learn every thing new in regard to mines ; while we in England sit still at home, and seldom go beyond a county or two ; though...
Page 77 - Handles (ss) adapted to it, that it may be laid hold of, and thus be taken away or put on again. And, that this being put on the Aperture (d) of the Furnace, may not be eafily thrown down, let an Iron Plate be rivetted to the right and left upper Edge of the Furnace (cc), and be turned down towards the Infide...
Page 347 - Scotch-coals, which burn to a white afh like wood, and abound more in bitumen, may be ufed in the firft fluxion of the iron from its ore ; and if the iron proves not fo malleable as required, this property may be given to it by melting the metal a fecond time with wood.
Page 455 - Mary, ch. 30. An Act to repeal the statute made in the fifth year of King Henry IV. against multiplying gold and silver. The Whole Act 5 William and Mary, ch. 6. An Act to prevent disputes and controversies concerning Royal Mines. The Whole Act 55 George III. ch.
Page 455 - Silver that fhall be extracted by the Art of Melting and Refining of Metals, and otherwife improving of them and their Ores, be from henceforth imployed for no other Ufe but the Increafe of Monies ; that it be carried to the Tower of London, where the Owner fhall receive the full Value.
Page 255 - Amalgama must be distilled through the Retort; because Part of the Silver and gold gets through the Leather: Nay, there remains nothing at all of the Silver or Gold within the Leather, if you use too great a Quantity of Mercury, to extract a small Quantity of these Metals : unless the Mercury be saturated with them, by a like previous Process; and even then, you may be easily deceived as to the Quantity and Quality of the Metal.