19 MARCH 1831, Page 19

ROYAL SOCIETY.

March 17th, 1831. His Royal Highness the Duke of SussEr, President, in the chair. The following papers were read,

" Proposed Plan for supplying Filtered Water to the Metropolis and its Suburbs." By Leonard William Wright, Esq. Communi- cated by T. J. Pettigrew, Esq. " On the Variable Intensity of • TerrestriaJ Magnetism, and the Influence of the Aurora Borealis upon it." By Robert Ware Fox, Esq. Communicated by D. Gilbert, Esq., V. P. R. S. The Rev. Thomas Smith Turnbull, M.A. ; Henry Fox Talbot, Esq.; and Christopher R. M. Talbot, Esq., were elected Fellows of the Society. Philip Hardwick, Esq., of Russell Square, Architect, F.S.A. ; and Thomas Maclean, Esq., of Biggleswade, in Bedfordshire, were proposed as candidates for election. The following presents were announced, viz. :—Method of ascertaining th%Strength of Acetic Acid, by means of its Density, founded upon Experiments. By A. Vander Toorn. Memoirs of the Royal Academy of Sciences of Stockholm, for the years 1827 and 1823; and Index to the same work, from the year 1813 to the year 1825, inclusive ; pre. sented by the Academy. Yearly Report of the Progress of Science ; published by the Officers of the Royal Academyof Sciences at Stockholm, in March'1828. The Memoirs of the Royal Academy of Sciences at Turin, vol. xxxiv. ; presented by the Academy. Nautical Almanac for the year 1833, three copies; presented by the Lords Commissioners of the Admiralty. The Second Supplement to an Essay on the Theory of Systems of Rays ; by W. R. Hamilton, Esq., Astronomer Royal for Ireland. On the Error of a received Principle of Analysis respecting Functions which vanish with their Variables ; by the same Author.