The "4 Ages of Man" Folio

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Here's a cross sectional view of a kerotakis
[url=http://www.alchemywebsite.com/images_apparatus.html][/url]

Described on Adam McLean's website among illustrations of Alexandrian chemical apparatus, from a 10/11th century manuscript in St Mark's, Venice. In Berthelot, Introduction a l'etude de Ia chimie des anciens et du moyen age, Paris, 1889.