British Library MS. Sloane 1423. Paper. Folio. 49 folios. 17th Century. [Formerly belonging to Clement Drax.] 1. The manner by which assays may be made of all mines of metals, as gold, silver, copper, lead, etc., translated from the Italian by [possibly Brembatti, see Mazzucheli, vol II. p2048]. 2. Chemical definitions. f27. 3. Sir George Ripley's treatise entitled, Medulla philosophiae chemicae, translated into English by some anonymous author. f27-33. 4. 'The vigitable of Sir George Ripley to the Bishop', or as it seems extracts taken from his Viaticum. f33v. 5. Sir George Ripley's treatise entitled, 'Compositio Mercurii alchymici', translated into English. f35. 6. Extracts, taken from Ripley's 'Pupilla alchimiae'. f35v. 7. On quicksilver. f36. 8. 'Here beginneth the concordance of G. Ripley between Raymond and Guido'. f36b. 9. The mystery of Alchemists composed by Sir George Ripley. f37v-39. [Partly printed in Theatrum Chemicum Britannicum p.380, but here with an addition.] 10. An extract from Ripley's 'De Mercurio et lapide philosophorum'. f40. 11. Extracts from Ripley's works and those of other alchemical authors. f41-49.