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Across 1. "kings water" 4. "wordless book" 5. It was sought by the alchemists as a connection to the elixir of life and the philosopher's stone, a mythical substance which would enable the transmutation of common metals into gold. 7. "water of life" 9. Alchemic Precept :"One becomes two, two becomes three, and out of the third comes the one as the fourth." 14. Philosophy and a practice with an aim of achieving ultimate wisdom as well as immortality, involving the improvement of the alchemist as well as the making of several substances described as possessing unusual properties. 15. Reputed to be hard as stone and malleable as wax 16. "Lord of the Earth" 18. Best alchemical drug of longevity

Down 2. "strong water" 3. Combination of the Greek god Hermes and the Egyptian god Thoth. 6. The conversion of base metals into metals of greater value, esp. into gold or silver. 8. Rare mineral composed of ammonium chloride 10. "The Wickedest Man In the World." 11. Posited the existence of the ether to transmit forces between particles 12. "the daughter of the king of Saba." 13. Succeeded in achieving immortality and obtaining the philosophers stone 17. Considered the most important alchemical substance