ICI Chemical Works & Laboratories, Manchester

Two lab technicians working with an array of retorts, flasks, test tubes and other intricate laboratory apparatus, jars on the shelves to the left of the frame, during the development of Antrycide, at the Imperial Chemical Industries (ICI) chemical works and laboratories in Blackley, Manchester, England, 1949. A synthetic drug, Antrycide was developed to immunise against tsetse-born diseases, such as trypanosomiasis, a disease related to sleeping sickness prevalent in African cattle. (Photo by Reg Burkett/Keystone Features/Hulton Archive/Getty Images)