The Chemical Theater

on preparing the divine Elixir, or the
Philosophical Stone. 911

XVIII. Four Chemical Observations,
by which the entire art of chemistry original Greek: περὶ χημείας (peri chēmeias); this refers to the fundamental principles of the "pouring" or "fusion" of metals. is fully revealed,
both in practice and in theory. 918

XIX. The Letter of Friar Roger Bacon Roger Bacon (c. 1214–1292) was a medieval English philosopher and Franciscan friar who is often celebrated as an early advocate for the scientific method. This influential letter argues that "magic" is a fraud and that seemingly miraculous effects are actually the result of secret natural laws and advanced technology., on the secret
works of art and nature, and the worthlessness of ma-
gic, including notes. 932

XX. A Scholarly Dialogue on the Medicinal Gold original: De auro medico; alchemists believed that gold, being the most perfect and incorruptible metal, could be prepared as a "potable" liquid medicine to extend human life and cure all ailments.
of the philosophers by Christopher Horn.
970