The elements of materia medica and therapeutics . ustion of the sulphur), and steam,are conveyed into the leaden chamber, and by their mutual reactionproduce sulphuric acid, which is absorbed by the water at the bottomof the chamber. To prevent loss in the process, the residual gasesare conveyed through two or more leaden chambers of unequal size(also containing water) before they are allowed to escape into the one manufactory which I inspected, the chambers communicated • a. de Humboldt, Vues des Cordilleres, p. 220. Mineralofiy, vol. i. p. 75. B Op. cit. p. 77. i Eaton, Quartfrli/ Jou
The elements of materia medica and therapeutics . ustion of the sulphur), and steam,are conveyed into the leaden chamber, and by their mutual reactionproduce sulphuric acid, which is absorbed by the water at the bottomof the chamber. To prevent loss in the process, the residual gasesare conveyed through two or more leaden chambers of unequal size(also containing water) before they are allowed to escape into the one manufactory which I inspected, the chambers communicated • a. de Humboldt, Vues des Cordilleres, p. 220. Mineralofiy, vol. i. p. 75. B Op. cit. p. 77. i Eaton, Quartfrli/ Journal of Science, 1829, p. 200. De CandoUe, P/iys. Veget. p. 390. i Traitede C/iim. t. 7% p. 393. ? Mr. Graham states, that sulphurous acid, nitric acid vapour, and steam, are simultaneouslyadmitted into the leaden chamber; but in the manufactory of which fig. 75 is a sketch, the processfollowed is that described in the text. SULPHURIC ACID. 46*5 with each other through a double-necked stone bottle, at the bottomof which was water. Fig. 75. h. Oil of Vitriol Manufactory. a. Fumaee. b. First leaden chamber.—In the manufactory from which the above sketch was made,this chamber was 70 feet long-, 20 feet wide,and 20 feet hi^h; but the size varies con-siderably in different Second ditto. d. Third ditto. e. Steam boiler. /. Pipe or chimney of the Steam pipe. h. Pipe conveying- the residual gas from thefirst to the second leaden chamber. i. Pipe conveying the gas not absorbed in thefirst and secmd chambers into the third. k. Waste pipe conveying the imabsorbed gasinto the atmosphere. I. Man-hole, by which the workmen enter thechamber when the process is not going on. m. Pipe for withdrawing a small portion of sul-phuric acid from the chamber, in order toascertain its sp. gr. by the hydrometer. The leaden chamber is sometimes divided into two or three com-partments by leaden curtains placed across it, as shown in the fol-lowing cut taken from Professor G
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Keywords: ., bookcentury1800, bookdecade1840, booksu, booksubjectmateriamedica
