IV 



Page 



The Bakerian Lecture. On the Absorption and Radiation of Heat by 

 Gases and Vapours, and on the Physical Connexion of Radiation, 

 Absorption, and Conduction. By Professor Tyndall, F.R.S 100 



On Magnetic Storms and Earth-Currents. By Charles V. Walker, 

 Esq., F.R.S _._ 105 



On Terephthalic Acid and its Derivatives. By Warren De la Rue, 

 Ph.D., F.R.S., &c., and Hugo Muller, Ph.D 112 



Notes on the Generative Organs, and on the Formation of the Egg in 

 the Annulosa. Part I. By John Lubbock, Esq., F.R.S 117 



Tables of the Weights of the Human Body and the Internal Organs 

 in the Sane and Insane of both Sexes at various Ages. By Robert 

 Boyd, M.D 124 



On the Electric Conducting Power of Copper and its Alloys. By 



A. Matthiessen, Ph.D 126 



List of Candidates for Election to the Fellowship 130 



On the Porism of the in-and-circumscribed Polygon. By Arthur 

 Cayley, Esq., F.R.S 131 



On a New Auxiliary Equation in the Theory of Equations of the 

 Fifth Order. By Arthur Cayley, Esq., F.R.S 134 



On Combustion in Rarefied Air. By Dr. Edward Frankland, F.R.S. 137 



On an Application of the Theory of Scalar and Clinant Radical Loci. 

 By Alexander J. Ellis, B. A 141 



A Seventh Memoir on Quantics. By Arthur Oayley, Esq., F.R.S. . . 142 

 On the Secular Change in the Magnetic Dip in London, between the 



years 1821 and 1860. By Major-General Edward Sabine, V.P.R.S, 144 

 On the Relations of the Vomer, Ethmoid, and Intermaxillary Bones. 



By John Cleland, M.D 1G3 



On the Structure and Growth of the Tooth of EcTiinm. By S. James 

 A. Salter, M.B 166 



On the Motion of a Plate of Metal on an Inclined Plane, when dilated 

 and contracted j and on the Descent of Glaciers. By the Rev. 

 Henry Moseley, M.A., F.R.S 168 



Preliminary Note on the production of Vibrations and Musical Sounds 

 by Electrolysis. By George Gore, Esq 177 



On the Effect produced on the Deviation of the Compass by the Length 

 and Arrangement of the Compass Needles j and on a New Mode of 

 correcting the Quadrantal Deviation. By Archibald Smith, M.A., 

 F.R.S. j and Frederick John Evans, Esq., R.N 179 



On the Distribution of Aqueous Vapour in the upper parts of the 

 Atmosphere. By Lieut.-Col. Richard Strachey, F.R.S 182 



On the Synthesis of Succinic and Pyrotartaric Acids. By Maxwell 

 Simpson, M.B , 190 



On Internal Radiation in Uniaxal Crystals. By Balfour Stewart, 

 A.M , 193 



On Format's Theorem of the Polygonal Numbers. By the Right 

 Hon. Sir Frederick Pollock, Lord Chief Baron, F.R.S 197 



Note on Professor Faraday's Recent Experiments on 'Regelation.' 

 By Professor James Thomson 198 



