Prof. S. W. Johnson, M. A., On the Nutrition of Plants.
Prof. Austin Flint, Jr., M. D., The Nervous System, and its Relation to the Bodily Functions.
Prof. Bernstein (University of Halle), The Five Senses of Man.
Prof. Ferdinand Cohn (Breslau University), Thallophytes (Algæ, Lichens, Fungi).
Prof. Hermann (University of Zurich), On Respiration.
Prof. Leuckart (University of Leipsic), Outlines of Animal Organization.
Prof. Liebreich (University of Berlin), Outlines of Toxicology.
Prof. Kundt (University of Strasburg), On Sound.
Prof. Rees (University of Erlangen), On Parasitic Plants.
Prof. Steinthal (University of Berlin), Outlines of the Science of Language.