Papers read to the Society, February 7, 1901.

"The Boiling Point of Liquid Hydrogen, determined by Hydrogen and Helium Gas Thermometers.” By Professor Dewar, F. R. S. “On the Brightness of the Corona of January 22, 1898. Preliminary Note.” By Professor H. H. Turner, F. R. S. “Preliminary Determination of the Wave-lengths of the Hydrogen Lines, derived from Photographs taken at Ovar at the Eclipse of the Sun, May 28, 1900.” By F. W. Dyson. Communicated by the Astronomer Royal, F. R. S. “Investigations on the Abnormal Outgrowths or Intumescences on Hibiscus vitifolius, Linn.: a Study in Experimental Plant Patholology.” By Miss E. Dale. Communicated by Professor Marshall Ward, F. R. S. “On the Proteid Reaction of Adamkiewicz, with Contributions to the Chemistry of Glyoxylic Acid.” By F. G. Hopkins and Sydney W. Cole. Communicated by Dr. Langley, F. R. S. “The Integration of the Equations of Propagation of Electric Waves.” By Professor Love, F. R. S.