For him chemistry was the science of the composition of substances, not merely an adjunct to the arts of the alchemist or the physician.
The oxide known as white arsenic is mentioned by the Greek alchemist Olympiodorus, who obtained it by roasting arsenic sulphide.
KUNKEL (or KUNCKEL) VON LOWENSTJERN, JOHANN (1630-1703), German chemist, was born in 1630 (or 1638), near Rendsburg, his father being alchemist to the court of Holstein.
ALESSANDRO CAGLIOSTRO, Count (1743-1795), Italian alchemist and impostor, was born at Palermo on the 8th of June 1 743.
Regarding all substances as being composed of one primitive matter - the prima materia, and as owing their specific differences to the presence of different qualities imposed upon it, the alchemist hoped, by taking away these qualities, to obtain the prima materia itself, and then to get from it the particular substance he desired by the addition of the appropriate qualities.