A new and complete dictionary of arts and sciences : comprehending all the branches of useful knowledge, with accurate descriptions as well of the various machines, instruments, tools, figures, and schemes necessary for illustrating them, as of the classes, kinds, preparations, and uses of natural productions, whether animals, vegetables, minerals, fossils, or fluids : together with the kingdoms, provinces, cities, towns, and other remarkable places throughout the world : illustrated with above three hundred copper-plates, engraved by Mr. Jefferys, geographer to His Majesty : the whole extracted from the best authors in all languages (1763)

Society of Arts (Great Britain). Society of Gentlemen, Jefferys, Thomas, -1771, Grignion, Charles, 1721-1810, Wale, Samuel, d. 1786, Owen, W. (William), d. 1793 · London : Printed for W. Owen, at Homer's Head, in Fleet-Street · leaf 893

An illustration from A new and complete dictionary of arts and sciences : comprehending all the branches of useful knowledge, with accurate descriptions as well of the various machines, instruments, tools, figures, and schemes necessary for illustrating them, as of the classes, kinds, preparations, and uses of natural productions, whether animals, vegetables, minerals, fossils, or fluids : together with the kingdoms, provinces, cities, towns, and other remarkable places throughout the world : illustrated with above three hundred copper-plates, engraved by Mr. Jefferys, geographer to His Majesty : the whole extracted from the best authors in all languages, 1763, leaf 893 — things reduced into it, directs notto prefcribe materials therein which arevolatile, or will any other way change inthe open air. The preparations, inten-tions, &c. of the feveral powders ufed inm«dicine, may be (een under their feve-ral heads. See the article Powder.Pulvis fulminans, among… … LV3W-«*» P U M f 2639 ] P U M three ounces of purified nitre, twoounces of fait of tartar, and one ounce ofbrimftone, and grind them well togetherin a mortar; then putting a fmall quan-tity, as about half a dram, over the fire,in the manner already mentioned, it willmake a great explofion. The…

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