Theorem 22, Monas Hieroglyphica (1564). This theorem is one of 24 contained in the work Monas Hieroglyphica by Welsh astrologer John Dee (1527-1608). An example of western Hermeticism and written in a mystical state, it revealed esoteric secrets in astronomy, alchemy, music, mathematics, linguistics, mechanics, and optics. Theorem 22 concerns instructions for producing various pharmacological preparations, with symbols and incomplete descriptions. In the text, Dee states that "these mysteries must not be revealed to any but the Initiates", and much of what is written in his book has not been explained.