A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . Retorts, or flasks with bent tubes, which screw in thu?, { fif). 220,) of copper, are em-ployed when it is requisite to produce high temperatures, as for the preparation of benzolefrom benzoic acid and baryta, or in making marsh gas from an acetate, &c. In distilling hydrofluoric acid, the whole apparatus should be constructed in lead; thereceiver consisting of a U-shaped tube of lead, which is fitted with leaden stoppers so as toserve for keeping the acid when
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . Retorts, or flasks with bent tubes, which screw in thu?, { fif). 220,) of copper, are em-ployed when it is requisite to produce high temperatures, as for the preparation of benzolefrom benzoic acid and baryta, or in making marsh gas from an acetate, &c. In distilling hydrofluoric acid, the whole apparatus should be constructed in lead; thereceiver consisting of a U-shaped tube of lead, which is fitted with leaden stoppers so as toserve for keeping the acid when prepared ; or a receiver of gutta percha may be employedwith a stopper of the same material. {Fig. 227.) For many purposes in the laboratory, as, for instance, the preparation of oxygen by DISTILLATION. 457 heating binoxide of manganese,—in the manufacture of potassium, &c., &e., where hightemperatures are required, the iron bottles in wliieh mercury is imported from Spain maybe employed, a common gun-barrel being screwed into tliem to act as a delivery tube orcondenser. {Fig- 228.) 227 228.
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
