Postcard - ‘A fourfold fire-ball’.
Alchemists recognize four kinds of fire of quantitative and qualitative difference: slow and tepid, moderate and tempered, big and strong, seething and vehement. Michael Maier (1568-1622) describes phases from the alchemical process in Atalanta fugiens, 1618.
There is a brief explanation of the image on the reverse of the card.
Size: 105x150 mm
© EFM/Bibliotheca Philosophica Hermetica Collection