American journal of pharmacy . which at the same time answer the purpose of syphon a b c is let into a wide tube d d, which is sup-plied with a current of cold water [below] through e. Thewater after becoming warm, flows off at g. The coolingis therefore effected by surrounding the hot acid in b c witha current of cold water passing in an opposite direction, theeffect of which is very much increased by making the longerlimb in four distinct tubes, as in fig. 9S. To fill the syphon Fig. the cock n is stopped, and acid is poured first into o, andthen into 6 till it runs down int
American journal of pharmacy . which at the same time answer the purpose of syphon a b c is let into a wide tube d d, which is sup-plied with a current of cold water [below] through e. Thewater after becoming warm, flows off at g. The coolingis therefore effected by surrounding the hot acid in b c witha current of cold water passing in an opposite direction, theeffect of which is very much increased by making the longerlimb in four distinct tubes, as in fig. 9S. To fill the syphon Fig. the cock n is stopped, and acid is poured first into o, andthen into 6 till it runs down into the retort through b 0 and 6 are now closed, and n opened, the syphoncomes into play. The exiracliou of common ?alt is next treated of, imme- 286 KWAPPS CHEMICAL TECHNOLOGY. diately followed by a detailed account of the soda manu-facture, in which salt and sulphuric acid are so largelyemployed. This intiportant process is so luminously explainedby descriptions and cuts, that the general reader, thoughbut little versed in chemical matters, can get a clear idea;and the fact that the English revisers have brought it upto the present state of the art in that country, will ensureits authority to the manufacturer. It remains to be seenwhat effect Mr. Tilghmans Patent will exert on the processat present in use. The dependence of one branch of manu-facture on another is beautifully illustrated in the connec-tion of the production of sulphuric acid, carbonate of soda,muriatic acid, chloride of
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Keywords: ., bookcentury1800, bookdecade183, booksubjectpharmacy, bookyear1835
