Different traditions of Alchemy?
The French and US versions of alchemy developed in very different directions. The French version was further developed across multiple editions and included brief rules for different cultural variants used by Chinese, Aztec and Amerindian Immortals. The US version reprinted only the first edition French rules and didn't benefit from any of the subsequent French revisions, so Chaosium ordered a rewrite of the alchemy rules to be printed in the canceled Slaying the Dragon supplement (although the author shared his draft on the mailing list). However, these rules were later adapted to generic BRP and reprinted in Enlightened Magic . If you're a fan of the US version then you should already be familiar with those. I found a fan-made French netbook that described the Old World traditions of Alchemy side-by-side and revised them for third edition (here: alchemy rules , western formulae , spagyrie artifacts ). I found this a very useful overview of the French cosmology and it got me ...