Cœlum philosophorum, seu liber de secretis naturæ, per Philippum Ulstadium ex variis autoribus accuratè selectus, variísque figuris illustratus. Nunc recèns adjecimus Joan. Anto. Campesii Directorium summæ summarum medicinæ.
Cœlum philosophorum is a 1557 Latin alchemical treatise compiled by Philipp Ulstadt from various authors and printed at Lyon by Guillaume Rouillé for students of natural secrets and medicine. Its pictures are small framed woodcuts of distillation vessels, a pear-shaped flask with a loop handle and a stoppered neck, repeated in each plate, showing how an apparatus's form can be reduced to a simple contour and a few hatched shadows.
