Gemma gemmarum alchimistarum oder Erleuterung der parabolischen und philosophischen Schrifften Fratris Basilii.
An alchemical treatise in German, a commentary on the parabolic and philosophical writings of Basil Valentine, printed as an early modern book with woodcut illustrations for a learned readership of alchemists. The pictures show a brick furnace with a domed still head and arched firing chambers, drawn in a plain woodcut line with heavy outlines, and a dense black scrolling ornament with curling leaf forms that a designer could take as a model for interlace borders and spot ornaments.
