Note 361 — Chapter VIII · FRIAR BACON
Reading edition
The alchemical preparation of gold had much in common with the refining of saltpetre. In the “Nitri Preparatio” of Bernard’s and Penoti’s Theatrum Chemicum, iii. 78, we read: “Fac postmodum de eo per omnia ut dicam in preparatione auri, id est, destilla per alambicum et congela,” &c.