Glasgow University Library MS. Ferguson 263. 57 folios, on vellum. 174x133mm. 15th Century. Tractatus de Alchemia. [In Latin.] 1. f1-37 Mineralia Alberti. [Imperfect breaks off at foot of f 40v. See Albertus Magnus 'Opera', edited Borgnet, v. 1-103. ] 2. f37v-38 Dubium apud multos esse solet... saluatur enim virtus ipsorum. Explicit liber de commixcione elementorum Fratris Thome de Aquino. [See 'Opera', xvi (1869), 353.] 3. f38v-40v, and f57v [A]d prognosticandum diuersam aeris disposicionem futuram... [Grosseteste [Sacrobosco], 'De impressionibus aeris'.] 4. f41-57r Quoniam quidem ars alchemica quamplures viros doctilogos videntibus oculis excauit... 5. f57v [Fragment of treatise on astronomy. Circular cosmos diagram divided into 12 sectors corresponding to the zodiacal signs, with seven concentric circles ascribed to the planets. At end: 'Explicit liber prognosticatones astronomices'.]