Graphic signs for alchemical substances, processes and equipment.

Egyptian symbols for the metals
Alchemical symbols used in 17th century
Alchemical and chemical symbols used by Scheele (18th century)
Chemical symbols used by Dalton (19th century)
Comprehensive list from Medicinisch-Chymisch- und Alchemistisches Oraculum, Ulm, 1755.
Alchemical and chemical symbols in Nicolas de Locques Les rudimens de la philosophie naturelle, Paris 1655.
Alchemical symbol fonts created by Adam McLean
Alchemical and chemical symbols in Nicolas le Fevre Traicte de la chymie.
Alchemical Symbols from a work by Annibal Barlet
Alchemical Symbols from Diderot's Encyclopedie
Alchemical Symbols from Goossen van Vreeswyk De Goude Leeuw
Alchemical Symbols from Athanasius Kircher