Annibal Barlet demonstrating the use of metals, 1657.
© Science Museum / Science & Society Picture Library
Woodcut showing Barlet's chemical course in his laboratory with the students taking notes in the foreground. One holds an Asclepian staff, symbol of medicine. Illustration in a section discussing how metals and their compounds can be used. From 'Le Vray et Methodique Cours de la Physique Resolutive Vulgairement dite Chymie' ('The True and Methodical Course in Resolutive Physick, Commonly called Chemistry'), by Annibal Barlet, published in Paris in 1657. Although the book contains a great deal of alchemical jargon, it is for the most part good practical pharmaceutical chemistry. Barlet gave regular chemical courses in Paris, attended by the diarist John Evelyn (1620-1706) amongst others.