The psychological and religious implications of alchemy were Jung's major preoccupation during the last thirty years of his life. The essays in this volume complete the publication of his alchemical researches, to which three other volumes have been entirely devoted: "Mysterium Coniunctionis", "Psychology and Alchemy", and "". This volume can serve as an introduction to Jung's work on alchemy. The first essay, on Chinese alchemy, marked the beginning of his interest in the subject, and was originally published in a volume written jointly with Richard Wilhelm. The other four are now published for the first time completely in English.