or A Description of Nature and Natural Things, in its various forms and editions, is perhaps one of the most descriptive and least ambiguous manuscripts on alchemical lore and the early explanations given during the late Renaissance and early Enlightenment periods regarding chemical and earthly processes. Less concerned with celestial and angelic symbolism and more focused on outright experimentation, it covers the processes of fixation, putrefaction, and generation in far more depth than most works of the era. First published in 1723 in German, later in 1757 in Latin and only partly translated into English by Sigismund Bacstrom in the late 18th century.
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