9 hours ago
"Ancient Indians achieved great progress in alchemy (the older form of chemistry). Alchemical treatises of ancient India refer to various types of 'Yantras' or contraptions for different applications."
https://artsandculture.google.com/story/...y-KQ?hl=en
https://artsandculture.google.com/story/...y-KQ?hl=en

