Digging, hoeing and harvesting, 1657.
© Science Museum / Science & Society Picture Library
Woodcut showing farm workers harvesting crops with a sickle while others dig and hoe weeds in a field. Illustration introducing a section discusing how plants and their extracts 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.