I. “Account of a Comparison of Magnetic Instruments at Kew Observatory.” By C. Chree, Sc.D., F. R. S., Superintendent. II. “Rote on the Influence of very Low Temperatures on the Germinative Power of Seeds.” By Horace T. Brown, F. R. S., and F. Escombe, B.Sc., F. L. S. III. “On the Structure and Affinities of Fossil Plants from the Palaeozoic Rocks. II. On Spencerites , a new Genus of Lycopodiaceous Cones from the Coal-measures, founded on the Lepidodendron Spencri of Williamson.” By D. H. Scott, M.A., Ph.D., F. R. S., Hon. Keeper of the Jodrell Laboratory, Royal Gardens, Kew. IV. “Antagonistic Muscles and Reciprocal Innervation. Fourth Note.” By C. S. S herrington, F. R. S., and Dr. E. H. Hering,