Papers read to the Society, April 8, 1897

I. “The Production of X Rays of different Penetrative Values.” By A. A. C. S winton. Communicated by Lord Kelvin, F. R. S. II. “Photographic Spectra of Stars to the 3 1/2 Magnitude.” By F. McClean, F. R. S. III. “Condensation of Water Vapour in the Presence of Dust-free Air and other Gases.” By C. T. R. Wilson, B.Sc. (Viet.), M.A. (Cantab.), of Sydney Sussex College, Clerk-Maxwell Student in the Dniversity of Cambridge. Communicated by Professor J. J. Thomson, F. R. S. IV. “Double (Antidrome) Conduction in the Central Nervous System.” By C. S. Sherrington, M.A., M.D., F. R. S., Holt Professor of Physiology, University College, Liverpool. V. “Further Note on the Sensory Nerves of Muscles.” By C. S. Sherrington, M.A., M.D., F. R. S., Holt Professor of Physiology in University College, Liverpool. VI. “On the Breaking-up of Fat in the Alimentary Canal under Normal Circumstances and in the Absence of the Pancreas.” By Vaughan Harley, M.D., M.R.C.P., Professor of Pathological Chemistry, University College, London. Communicated by Professor Horsley, F. R. S. VII. “On the Application of Harmonic Analysis to the Dynamical Theory of the Tides. Part I. On Laplace’s ‘ Oscillations of the First Species,’ and on the Dynamics of Ocean Currents.” By S. S. Hough, M.A., Fellow of St. John’s College and Isaac Newton Student in the University of Cambridge. Communicated by Professor G. H. Darwin, F. R. S. VIII. “On Boomerangs.” By G. T. Walker, M.A., B.Sc., Fellow of Trinity College, Cambridge. Communicated by Professor J. J. Thomson, F. R. S. IX. “Cathode and Lenard Bays.” By J. A. McClelland, M.A, Junior Fellow B.U.I. Communicated by Professor J. J. Thomson, F. R. S.