Collection of slides used by Meinwald for presentations and lectures. Slides show, text and images including chemical formulas from his research, charts showing results of mass spectrometry research, photographs of insects, plants and various flora and fauna that were investigated for chemical communication. Also photographs of coworkers and travel from places where Meinwald worked including Instituto Nacional de Biodiversidad in Costa Rica, International Centre of Insect Physiology and Ecology in Kenya, and from India. Some images of insects may have been taken by Thomas Eisner.