Ancient methods purportedly used to "purify" metals.
Hakim Abul Qasim Mansoor Dhu'l-Qarnayn, a prominent Unani physician, wrote Roohul Kimiya in the 17th century. During this time, Unani medicine was a thriving field, with many scholars and practitioners contributing to its development. The book was written in response to the growing interest in alchemy and the need for a comprehensive guide to the spiritual and philosophical aspects of Unani medicine. roohul kimiya pdf free download