The actum leyden alchemy letter is basically an alchemical manuscript depicting a secret alchemy process called the dew and salt method. It references alchemists working with dew and sea salt in a highly guarded secret alchemy recipe or formula. Some versions of the actum leyden alchemy letter also mention the use of gold chloride as well as silver chloride. Wrapping this ‘philosopher’s stone” in wax is also mentioned as well as melting it with gold to create what the letter calls “the projection powder”. Multiplication is also described as well as open/closed flask and heating instructions. I dare say i believe the ingredients listed in the actum leyden letter are probably code names substituted for other substances. Advanced crystal growing comes to mind.
Alchemy 2020 The man from the past, Secret of the old book, Time to burn.