Thee Three Primes was a series of three known elements that alchemists believed determined diseases, life and the soul in a humans life and control of these elements could heal illness and create life.
Alchemy symbols are illustrations that have been used by alchemists for hundreds of years to communicate between alchemists about different elements and scientific methods in the pursuit of alchemy. It was also used as a way to protect their discoveries and findings as often they were only known by a few people.