. A treatise on pharmacy .. . 298 ON DISTILLATION, ETC. tion as that the upper projection forms a gutter for conducting thecondensed fluid as it runs down on the under surface of the cone d dinto the neck C, while the lower part projects downward into thegutter a a to form the water joint. The course of the circular rim c c is of necessity inclined downwardstoward the under edge of the neck 0, as indistinctly shown in thesection in order to determine its liquid contents in that direction. b is an opening in the top of the condenser, stopped by a cork, for Fig. Section of pharmaceutical s
. A treatise on pharmacy .. . 298 ON DISTILLATION, ETC. tion as that the upper projection forms a gutter for conducting thecondensed fluid as it runs down on the under surface of the cone d dinto the neck C, while the lower part projects downward into thegutter a a to form the water joint. The course of the circular rim c c is of necessity inclined downwardstoward the under edge of the neck 0, as indistinctly shown in thesection in order to determine its liquid contents in that direction. b is an opening in the top of the condenser, stopped by a cork, for Fig. Section of pharmaceutical still. inspecting the progress of the distillation, and adding to the contentsof the boiler; e is a funnel tube into which a current of cold water isdirected during distillation, while as it becomes warm it ascends andescapes by the tube on the other side. The water joint is to be nearlyfilled at the commencement of the operation, and effectually preventsthe escape of the vapor. The long-continued application of a pretty high heat, which is neces-sary in distillation, involves an expense which, if gas or even charcoalfuel is employed, may approach the value of the alcohol recovered,so that in the winter time it is well to avail ourselves of the stove usedfor heating the apartment by fitting the still to it, and distilling slowlyat the moderate heat thus obtained. The advantage gained by theexclusion of the atmosphere in distillation is not to be overlookedwhen vegetable preparations are being concentrated. The head ofthe still becoming full of steam excludes
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectpharmacy, bookyear186
