Al-Jaldakī - Proof Regarding the Secrets of the Science of the Balance, “Kitāb al-Burhān fī asrār ‘ilm al-mīzān”, 14th century.
A schematic diagrams in the form of a pan-balance from a copy of the alchemical treatise “Kitāb al-Burhān fī asrār ‘ilm al-mīzān”. This treatise is concerned in large part with the alchemical theory of the ‘Balance’, but it also includes an elaborate classification of animals, plants, and minerals. In essence it is a summary of knowledge up to al-Jaldakī’s day, not only in alchemy but also in cosmology, physics, astrology, and numerology.
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