A true light of alchymy : containing, I. A correct edition of The Marrow of alchymy, being a celebrated experimental treatise, discovering the secrets and most hidden mystery of the philosophers elixir, both in theory and practice. II. The errors of a late tract called, A short discourse of the quintessence of philosophers, wherein is pretended to be set forth, how one select person might be made partaker of it by the authors means, and others rightly directed in prosecuting that study. III. The method and materials pointed at, composing the Sophick Mercury, and transmuting elixir, in plain terms, free from all enigmas, the like never before emmitted to the world
Author from Duveen and Ferguson; also attributed to Eirenaeus Philoponos Philalethomes (ESTC), Sir George Ripley (Halkett & Laing), or Michał Sędziwój.
"The marrow of alchymy" (p. 1-88) is in two parts; pt. 2 has individual title page; pagination and register are continuous.
Signatures: A-H⁶ I⁴.
"The errors of a late tract....": p. 89-92.
"The method and materials pointed at, composing the sophic mercury": p. 93-97.