"Plantation workers collecting cinnamon, early 20th century. "
© Science Museum / Science & Society Picture Library
"'Droghe; Cannella. Cinnamomum zeylanicum' (Cinnamon). One of a set of tade cards about the production of spices. The cinnamon plant and flower are illustrated on the left, and black agricultural workers harvest the plant on the right. The Liebig company produced sets of trade cards to promote their meat extract, a cheap and nutritious product invented in 1847 by chemist, Justus von Liebig. The meat extract was produced from 1865 at the Fray Bentos-Liebig processing plant set up in Uruguay. 1,863 sets of cards were produced continuously from 1872 until 1975 by which time the company had joined with Brooke Bond to become Brooke-Bond Oxo and was owned by Unilever."