Alchemy, ancient and modern . and was muchused for distillations. In the present case, however,the alembics are employed in conjunction with appa-ratus for subliming difficultly volatile 5, fig. B, shows another apparatus for sublima-tion, consisting of a sort of oven, and three detachableupper chambers, generally called aludels. In bothforms of apparatus the vapours are cooled in theupper part of the vessel, and the substance isdeposited in the solid form, being thereby purifiedfrom less volatile impurities. Plate 6, fig. A, showsan athanor (or digesting furnace) and a couple
Alchemy, ancient and modern . and was muchused for distillations. In the present case, however,the alembics are employed in conjunction with appa-ratus for subliming difficultly volatile 5, fig. B, shows another apparatus for sublima-tion, consisting of a sort of oven, and three detachableupper chambers, generally called aludels. In bothforms of apparatus the vapours are cooled in theupper part of the vessel, and the substance isdeposited in the solid form, being thereby purifiedfrom less volatile impurities. Plate 6, fig. A, showsan athanor (or digesting furnace) and a couple ofdigesting vessels. A vessel of this sort was employedfor heating bodies in a closed space, the top beingsealed up when the substances to be operated uponhad been put inside, and the vessel heated in ashesin an athanor, a uniform temperature being main-tained. The pelican, illustrated in plate 6, fig. B,was used for a similar purpose, the two arms beingadded in the idea that the vapours would be circulatedthereby. PLATE cq
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Keywords: ., bookcentury1900, bookdecade1920, bookidalchemyancie, bookyear1922
