THE ALCHEMICAL ELEMENTS AND PRINCIPLES V.THE ALCHEMICAL ESSENCE VI.

ALCHEMY AS AN EXPERIMENTAL ART VII.

THE LANGUAGE OF ALCHEMY VIII.

THE DEGENERACY OF ALCHEMY IX.

PARACELSUS, AND SOME OTHER ALCHEMISTS X.SUMMARY OF THE ALCHEMICAL DOCTRINE--THE REPLACEMENT OF THE THREE PRINCIPLES OF THE ALCHEMISTS BY THE SINGLE PRINCIPLE OF PHLOGISTON XI.