A short alchemical tract. The Chemists Key to Shut and Open: As the True Doctrine of the Corruption and Generation in Ten Brief Aphorisms, Illustrated with most plain and faithful Commentaries, out of the Pure Light of Nature: By that Judicious and Industrious Artist, Henry Nollius. "Heinrich Nolle (Latin Henricus Nollius; * 1583 in Ziegenhain; † 1626 in Weilburg) was a German philosopher, physician and alchemist. He was particularly valued for his knowledge of Hermetic philosophy." (https://de.wikipedia.org/wiki/Heinrich_Nolle)
Source and copyright Global Grey Ebooks: https://www.globalgreyebooks.com/index.html. The book can be downloaded from the Global Grey website.