Aludel (Wikipedia)

This is Wikipedia's article on the aludel, the pear-shaped vessel used in traditional alchemical sublimation apparatus. As a perpetually community-edited reference page rather than a peer reviewed publication, it is a reasonable source for standard, uncontroversial facts, the vessel's shape, function and place within a still-head distillation setup, but not the source to rely on for a contested or specialist historical claim about a particular alchemist's specific use of one. Cite it for the ordinary descriptive facts it states and check a specialist history of alchemical apparatus for anything more specific.