Madame Mim: Rule One: No mineral or vegetable, only animals. Rule Two: No make-believe things like, ooh, pink dragons and stuff. Now, Rule Three: No disappearing.
Dr Principe wants to rehabilitate alchemy. He believes that most alchemists were respectable seekers after knowledge and that they were working with well constructed (if ultimately misguided) theories. The reputation of the alchemists, he reckons, was deliberately undermined by gentleman amateurs who were trying to give the emerging science of chemistry the social respectability it needed to sit at the academic high table.
The work of Dr Principe, though, also serves as a useful reminder to modern scientists that even the most cherished theories need to be treated with constant scepticism. This is because, as the alchemists found out, it can be all too easy to see in your results what you want to see, rather than what is actually there.
Alchemy’s roots lie in Hellenistic Egypt. It was compounded from a mixture of practical knowledge of things like metallurgy, pharmacy and glassmaking with the Greek practice of analysing and theorising about the world that is known as philosophy. These Hermetic ideas (Hermes was the legendary founder of alchemy) were picked up and developed by Arab scholars when Egypt fell to the armies of Islam in the seventh century, and then transmitted to Europe during the scholastic renaissance of the 12th century.
For the next five centuries, Dr Principe thinks, alchemists were the “northern chemists” of Europe.