London, Wellcome Institute MS. 523.
100 folios. 200x140mm. 15th Century [1430.]

Miscellanea Alchemica XX. [Aix.]
1. f2-16 J. Saulnier. De la transmutation des métaux.
2. f18-71v J. de Rupescissa. De consideratione quintae essentiae [first 10 1/2 chapters wanting.]
3. f72-100v Arnoldus de Villanova. Liber de aquis.