. Transactions. wn by the barium sulphate. The water wasfound by the difference. The results of the analysis are givenin Table III. Table III.— Composition of Zinc Sulphate. By Analysis. By Calculation. so3 Per Cent. By difference. Per Cent. ZnO H20 Eatio :S03 7 Handbuch der Metcdlhuettenkunde, Springer, Berlin, 1901, 2d ed., vol. ii., p. 46. 8 Berichte der Deutschen Chemischen Gesellschaft, 1901, xxxiv., 4,069 ; transl. byRunoff, Mineral Industry, 1901, x., 605. ! [ON IND FORM \ MOH OF ZINC ~ \ I B. - I 5 The results in Table III Bh
. Transactions. wn by the barium sulphate. The water wasfound by the difference. The results of the analysis are givenin Table III. Table III.— Composition of Zinc Sulphate. By Analysis. By Calculation. so3 Per Cent. By difference. Per Cent. ZnO H20 Eatio :S03 7 Handbuch der Metcdlhuettenkunde, Springer, Berlin, 1901, 2d ed., vol. ii., p. 46. 8 Berichte der Deutschen Chemischen Gesellschaft, 1901, xxxiv., 4,069 ; transl. byRunoff, Mineral Industry, 1901, x., 605. ! [ON IND FORM \ MOH OF ZINC ~ \ I B. - I 5 The results in Table III Bhow thai the analysis gave al2 per rent, less water than the quantity required by the for-mula. This difference was accounted for by the feci that thesalt hail been kepi in a closel the temperature of which hadBometimes reached 80 C, CTpon close examination the eitale appeared dull, as it they had weathered. The clomenl t the two ratios of >( > : ZnO, proves that the Bulphate the normal salt. Electric Tube-Furnace with Gas-Traix. A, Gasometer; B, Allihn wash-bottle with permanganate ; C, Drying tower ;D, Tube-furnace ; E, Railroad-tube with indicator-solution ; F, Calcined mag-nesia ; G, Asbestos-magnesia; H. Kluted asbestos steam-pipe covering; J, Por-celain tube ; K, Platinum boat ; L, Thermo-couple; M, Rubber stopper. III. Furnaces and Pyr&mett Two electric furnaces and one gas-furnace served for theheat-work. The electric furnaces were of the resistance t;first suggested and used by Prof. C. L. Xorton9 in 1804, andsince then commonly employed for laboratory heating-purpwith temperatures up to about 1,400° C. Fig. 1 represent*sketch of the tube-furnace, D, with gas-train, A, B. C. A por-celain tube, J, J, 22 in. long and 1 in. internal diameter, dazed 9 Fay and Badlam, Technology Quarterly, 1900, xiii., 304; Norton, Iron Age,Jan. 3, 1901, p. 22. 816 DECOMPOSITION AND FORMATION OF ZINC SULPHATE. inside only, was wouixl in tlic center for a distance of aboul 8
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
