I. “Experiments on the Absence of Mechanical Connection betwen Ether and Matter,” By Oliver Lodge, D.Sc., F. R. S., Professor of Physics, University College, Liverpool. II. “Second Report on a Series of Specimens of the Deposits of the Nile Delta, obtained by Boring Operations undertaken by the Royal Society.” By John W. Judd, C.B., LL.D., F. R. S., Professor of Geology in the Royal College of Science. III. “ The Palaeolithic Deposits at Hitchin and their Relation to the Glacial Epoch.” By Clement Reid., F.L.S., F.G.S., of the Geological Survey of the United Kingdom. Communicated by Sir Archibald Geikie, F. R. S. IV. “Luminosity and Photometry.” By John Berry Haycraft,. M.D., University College, Cardiff. Communicated by Professor Schäfer, F. R. S.