The Balfour Memorial (pp. 59-60) Rearing Oysters from Artificially Impregnated Eggs (pp. 60-62) by J. A. Ryder The Mappemonde of Sebastian Cabot (pp. 62-65) by Charles Deane Map of the Planets and Stars near the Sun, May 6, 1883 (p. 65) by Edward S. Holden First use of Wire in Deep-Sea Sounding (p. 65) by William H. Dall An Extension of the Theorem of the Virial and its Application to the Kinetic Theory of the Constitution of Gases (pp. 65-66) Consequences of Spleen Extirpation (pp. 66-67) by H. Newell Martin The Cachar Earthquake of 1869 (p. 67) by W. M. Davis A class-room experiment (p. 67) by F. W. Clarke Domestic ducks that fly abroad like pigeons (pp. 67-68) by F. H. Storer Poole's New Index (p. 68) Sir Charles Lyell (pp. 69-70) Weekly Summary of the Progress of Science (pp. 70-82) Intelligence from American Scientific Stations (p. 83) Notes and News (pp. 83-84)