INDEX TO THE PHILOSOPHICAL TRANSACTIONS, » S e r ie s A, FOR THE YEAR 1898 (VOL. 191). A. Absorption, Change of, produced by Fluorescence (B urke), 87. Aneroid Barometers, Experiments on.—Elastic After-effect; Secular Change; Influence of Temperature (Chree), 441. B. Bolometer, Surface, Construction of (Petavel), 501. Brilliancy, Intrinsic, Law of Variation of, with Temperature (Petavel), 501. Burke (John). On the Change of Absorption produced by Fluorescence, 87. C. Chree (C.). Experiments on Aneroid Barometers at Kew Observatory, and their Discussion, 441. Correlation and Variation, Influence of Random Selection on (Pearson and Filon), 229. Crystals, Thermal Expansion Coefficients, by an Interference Method (Tutton), 313. D. Differential Equations of the Second Order, &c., Memoir on the Integration of; Characteristic Invariant of (Forsyth), 1. 526 INDEX. E. Electric Filters, Testing Efficiency of; Dielectrifying Power of (Kelvin, Maclean, and Galt), 187. Electricity, Diffusion of, from Carbonic Acid Gas to Air; Communication of, from Electrified Steam to Air (Kelvin, Maclean, and Galt), 187. Electrification of Air by Water Jet, Electrified Needle Points, Electrified Flame, &c., at Different Air-pressures; at Different Electrifying Potentials; Loss of Electrification (Kelvin, Maclean, and Galt), 187. Electrolytic Cells, Construction and Calibration of (Veley and Manley), 365. Emissivity of Platinum in Air and other Gases (Petavel), 501. Equations, Laplace's and other, Some New Solutions of, in Mathematical Physics (Forsyth), 1. Evolution, Mathematical Contributions to Theory o f; Influence of Random Selection on the Differentiation of Local Races (Pearson and Filon), 229. F. Filon (L. N. G.) and Pearson (Karl). Mathematical Contributions to the Theory of Evolution.—IV. On the Probable Errors of Frequency Constants and on the Influence of Random Selection on Variation and Correlation, 229. Fluorescence, Change of Absorption produced by (B urke), 87. Forsyth (A. R.). Memoir on the Integration of Partial Differential Equations of the Second Order in Three Independent Variables when an intermediary Integral does not exist in general, 1. G. Galt (Alexander), Kelvin (Lord), and Maclean (Magnus). Electrification of Air, of Vapour of Water, and of other Gases, 187. H. Harmonic Analysis, applied to Tidal Theory (H ough), 139. Helium Stars, Condensation of, in Galactic Zone—possible presence of Oxygen in Spectra of (McClean), 127. Hough (S. S.). On the Application of Harmonic Analysis to the Dynamical Theory of the Tides.—Part II. On the General Integration of Laplace’s Dynamical Equations, 139. K. Kelvin (Lord), Maclean (Magnus), and Galt (Alex.). Electrification of Air, of Vapour of Water, and of other Gases, 187. L. Lees (Charles H.). On the Thermal Conductivities of Single and Mixed Solids and Liquids and their Variation with Temperature, 399. M. McClean (I rank). Comparative Photographic Spectra of Stars to the 3J Magnitude, 127. Maclean (Magnus), Kelvin (Lord), and Galt (Alex.). Electrification of Air, of Vapour of Water, and of other Gases, 187. Manley (J. J.) and Veley (V. H.). The Electric Conductivity of Nitric Acid, 365. Mond (Ludwig), Ramsay (William), and Shields (John), On the Occlusion of Hydrogen and Oxygen by Palladium, 105. INDEX. 527 N. Nitric Acid—Preparation and Purification, Properties of Anhydrous Acid, Hydrates of, Specific Resistances, Conductivities and Temperature Coefficients (V e l e y and M a n l e y ) , 365. O. Occlusion of Hydrogen and Oxygen by Palladium—Nature of, Heat of, Effects of Pressure (Mond, Ramsay, and Shields), 105. Ocean, Free Oscillations of the (Hough), 139. P. Palladium, Occlusion of Hydrogen and Oxygen by; Density of (Mond, Ramsay, and Shields), 105. Peakson (Kael) and Filon (L. N. G.). Mathematical Contributions to the Theory of Evolution.—IV. On the Probable Errors of Frequency Constants and on the Influence of Random Selection on Variation and Correlation, 229. P e t a v e l (J. E.). On the Heat Dissipated by a Platinum Surface at High Temperatures, 501. Photometry, Photographic Method in (B u e k e ), 87. Platinum, Emissivity of; Specific Resistance of, at Melting-point (Petavel), 501. Probability—Theory of Errors in Frequency (Peabson and F ilon), 229. R. Races, Local, Influence of Random Selection on Differentiation of (Peaeson and Filon), 229. Ramsay (William), Mond (Ludwig), and Shields (John). On the Occlusion of Hydrogen and Oxygen by Palladium, 105. S. Shields (John), Mond (Ludwig), and Ramsay (Willtam). On the Occlusion of Hydrogen and Oxygen ny Palladium 105. Stars, Photographic Spectra of—Classification of—Distribution (MoClean), 127. T. Thermal Conductivities of Solids, Liquids, and Mixtures. Variation with Temperature (Lees), 399. Thermal Expansion Coefficients for Platinum, Iridium, Aluminium, and Small Crystals (Tutton), 313. Tides, Dynamical Theory; Laplace’s Theory (Hough), 139. Tutton (A. E.). A Compensated Interference Dilatometer, 313. V. Veley (V. II.) and Manley (J. J.). The Electric Conductivity of Nitric Acid, 365. LONDON: HARRISON AND SONS, PRINTERS IN ORDINARY TO HER MAJESTY, ST. MARTIN’S LANE, W.C. THE ROYAL SOCIETY. 30th N ovember, 1898. THE ROYAL SOCIETY. Nov. 30,1898 H er S acked M ajesty QUEEN VICTORIA, P atron. JHato of Election. 1863. Feb. 12. HIS ROYAL HIGHNESS THE PRINCE OF WALES, K.G. 1882. Mar. 16. HIS ROYAL HIGHNESS THE LUKE OF SAXE COBURG AND GOTHA, K.G. 1893. June 8. TITS ROYAL HIGHNESS THE DUKE OF YORK, K.G. THE COUNCIL OF THE ROYAL SOCIETY. THE LORD LISTER, F.R.C.S., D.C.L., LL.D.—P resident. PROF. THOMAS GEO ROE BONNE Y, D.Sc.— JOSEPH LARMOR, D.Sc. V ice-P resident. PROF. NEVIL STORY MASKELYNE, M.A.— CAPTAIN ETTRICK WILLIAM CREAK, R.N. V ice-P resident. PROF. DANIEL JOHN CUNNINGHAM, M.D. SIR ANDREW NOBLE, K.C.B. PROF. JAMES DEWAR, M.A PROF. EDWARD BAGNALL POULTON, PROF. MICHAEL FOSTER, M.A., M.D., D.C.L., M.A. LL.D.—S ECRETART. PROF. ARTHUR WILLIAM RUCKER, M.A, SIR EDWARD FRANKLAND, K.C.B., D.C.L., D.Sc.—S ecretary. LL.D.—F oreign S ecretary. WILLIAM JAMES RUSSELL, P h.D. -V ice- PROF. WILLIAMDOB1NSON HALLIBURTON, P resident. M.D. PROF. ARTHUR SCHUSTER, P h D. PROF. WILLIAM ABBOTT HERDMAN, D.Sc. DUKINFIELD HENRY SCOTT, M.A. VICTOR A. H. HORSLEY, F.R.C.S. GEORGE JOHNSTONE STONEY, D.Sc. ALFRED BRAY KEMPE, M, A —T reasurer and PROF. JOSEPH JOHN THOMSON, M.A. V ice-P resident. *** This Council will continue November 30, 1899. Assistant-Secretary and . ROBERT HARRISON. Cleric. Assistant Librarian. THEODORE E. JAMES. A. HASTINGS WHITE. Office Assistant. RICHARD CHAPMAN. Omissions having occasionally occurred in the Annual List of Deceased Fellows, as announced from the Chair at the Anniversary Meeting of the Royal Society, it is requested that any information on that subject, as also Notice of Changes of Residence, be addressed to the Assistant Secretary. FELLOWS OF THE SOCIETY. NOVEMBER 30, 1898. (C) prelixed to a name indicates the award of the Copley Medal. (R) • • • • .. * • .. • Koval Medal. (Rm) .. .. .. „ .. .. Runiford Medal. (D) .. .. .. .. *. .. Davy Medal. (Dw.) . * .. .. .. .. .. Darwin Medal. (B) «• .. .. .. .. .. Buchanan Medal, (t) .. .. is liable to an annual payment of £4. (*) •• •« •• •• •• •• •• £3. Served on Date of Election. Council. Juno 7, 18GO. ’67—69 R. f Abel, Sir Frederick Augustus. Bart., K.C.B. D.C.L. (Oxon.) D.Sc. (Camb.) V.P.C.S. ’77-79 V.P.S. A rts.; Hon. Mem. Inst. C.E., Inst. M.E.; Orel. Imp. Bras. Rosae E q.; Hon. Mem. Deutsch. Chem. Gesell.; Mem. Soc. d’Encourag. Paris; Sec. and Director of the Imperial Institute. 2 Whitehall-court, S.W.; Imperial Institute, Imperial Institute-road. S.W. June 1, 1876. ’83-85 Rm. Abney, William de Wiveleslie, Capt. R.E. C.B. D.C.L. (Dunelm.) F.I.C. F.C.S. ’91-93 F.R.A.S., Director for Science in the Science and Art Department. Rathmore Lodge, Bolton-gardens South, EarVs S.W .; and Athenaeum Club. S.W. Jan. 21,1847. '58-59 Acland, Sir Henry Wentworth Dyke, Bart., K.C.B. A.M. M.D. LL.D. (Cantab.) F.R.G.S.; Coll. Reg. Med. Soc.; Hon. Student of Ch. Ch.; Radcliffe Librarian and late Reg. Prof, of Medicine in the University of Oxford. , Oxford. June 6, 1872. ’82-84 Adams, William Grylls, M.A. D.Sc. F.G.S. F.C.P.S. Vice-President of Physical ’96-98 Soc.; Past Pres. Inst. Elec. Eng.; Professor of Natural Philosophy and Astronomy in King’s College, London. 43 W. June 6, 1889. * Aitken, John, F.R.S.E. Ardenlea,Falkirk. N.B. June 3, 1880. ’96-98 * Allbutt, Thomas Clifford, M.A. M.D. LL.D. F.L.S. Regius Professor of Physic in the University of Cambridge. St. Cambridge. June 12, 1884. * Allman, George Johnston, LL.D. (Dubl.) D.Sc. Emeritus Professor of Mathe­ matics in Queen’s College, Galway; Member of Senate of the Royal Uni­ versity of Ireland. St. Mariks, Galway. June 12, 1879. Anderson, John, M.D. LL.D. (Edin.) F.R.S.E. F.S.A. F.L.S. F.Z.S. late Superin­ tendent, Indian Museum, and Professor of Comparative Anatomy in the Medical College, Calcutta. 71 HS.W. June 4, 1891. * Anderson, Sir William, K.C.B. D.C.L. Director General of Royal Ordnance Factories; Past Pres. Inst. Mech.E.; Mem. Inst. C.E.; Hon. Mem. Roy. Agric. Soc. 6 Royal Arsenal, Woolwich. June 7, 1888. * Andrews, Thomas, F.R.S.E. F.C.S. Mem. Inst. C.E., Telford Medallist and Prize­ man. Raven crag, Worthy, near S June 19, 1851. ’55-56 f Argyll, George Douglas Campbell, Duke of, K.G. K.T. D.C.L. (Oxon.) LL.D. ’83-84 (Camb.) Trust. Brit. Mus.; Hon. V.P.R.S. Edin.; F.G.S. Argyll Lodge, Ken­ sington, W .; and, Inverary Castle, June 12, 1873. f Armstrong, Sir Alexander, K.C.B.