சித்த இலக்கியத்தில் இரசவாதம் (Alchemy in Siddha Literature)
After the Discover of nuclear structure and radioactivity, transmutations of elements becomes routine. Previously people thought that it is through chemical changes but it is actually physical transformation. In ancient Siddha literature, Alchemy was discussed for treatment of diseases and retaining youth. A Philosophical tradition recognized as protoscience that includes the application of Hermetic principles and practices related to mythology, religion and spirituality. Alchemy and chemistry were seen in medieval Islam Medicine, Chinese medicine and Indian traditional medicine. It was born in ancient Egypt here the word Khen was used in reference to the fertility of the flood plains around the Nile. Al-Khemia meaning the black land is now seen as a possible origin for the word for alchemy.