Alch. Obs. (See the quot.)
1471. Ripley, Comp. Alch., II. (Ashm. 1652), 135. These two and no mo Be our Magnesia, our Adrop.
1610. B. Jonson, Alch., II. iii. (1616), 627. Your moone, your firmament, your adrop.
1753. Chambers, Cycl. Supp., Adrop, among alchemists, denotes either that precise matter, as lead, out of which the mercury is to be extracted for the philosopher’s stone; or it denotes the philosopher’s stone itself, inasmuch as this is also called saturn and plumbum, or lead. Castellus [Lex. Med., Geneva 1746] in voc.
