London, Wellcome Institute MS. 4316. 1 folio + 18 + 223 pages. 210x165mm. 18th Century [1780.] Alexius von Ruesenstein. Russensteins chymische Schriften. [The second part is apparently a version of 'Auserlesene chymische Universal und Particular Processe, welche Herr Baron vin Rusenstein...', Frankfurt and Leipzig 1754. [From Julius Kohn Library.]