VI CONTENTS OF VOL. XXXI. FOUUTH SERIES. 



Page 

 Proceedings of the Cambridge Philosophical Society : — 



Prof. C. Babington on the Papyrus of the Lake of Gennesaret 315 

 Mr. H. Seeley on a New Theory of the Skull and of the 



Skeleton 316 



Proceedings of the Royal Society : — 



Mr. B. Stewart on the Specific Gravity of Mercury 316 



Proceedings of the Geological Society: — 



Mr. W. T. L. Travers on the mode of formation of certain 



Lake-Basins in New Zealand 318 



Mr. R. Dawson on the occurrence of dead Littoral Shells 



in the bed of the German Ocean 318 



Mr.T. F. Jamieson on the Glacial Phenomena of Caithness 318 

 On the Electrical Conductivity of Gases under feeble Pressures, 



by A. Morren 319 



On St. Elmo's Fire, by Professor Frankland, F.R.S 321 



Historical Notice in reference to the retardation of the Earth's 



Velocity of Rotation, by Professor Fick 322 



On Sea-levels, by D. D. Heath, Esq 323 



On the Axial Rotation of the Earth, by J. S. Stuart Glennie, 



M.A., F.R.A.S., &c 323 



On the relation between the Variation of Sun-spots and that of 

 the Amplitude of Magnetic Oscillation, by Father Secchi . , 324 



NUMBER CCX.— MAY. 



M. "W. Siemens on the Question of the Unit of Electrical Re- 

 sistance 325 



Mr. J. P. Cooke on the Aqueous Lines of the Solar Spectrum 337 

 Prof. Challis on the Motion of a small Sphere acted upon by 



the Undulations of an Elastic Fluid 343 



M. L. Schwendler on the Galvanometer Resistance to be em- 

 ployed in testing with Wheatstone's Diagram 364 



Prof. Young on the Completion of the Demonstration of New- 

 ton's Rule, and on a general property of derived Polynomials. 369 



Mr. J. C. Moore on Glacial Submergence 372 



Prof. Haughton on the Change of Eccentricity of the Earth's 



Orbit regarded as a Cause of Change of Climate 374 



Dr. Matthiessen on the Question of the Unit of Electrical Resistance 376 

 Prof. Sylvester's Supplemental Note on the Analogues in Space 



to the Cartesian Ovals in piano 380 



Prof. Tyndall on Calorescence 386 



Proceedings of the Royal Society : — 



Prof. W. H. Miller on the Forms of Graphitoidal Silicon 



and Graphitoidal Boron 397 



Proceedings of the Geological Society : — 



Mr. R. J. L. Guppy on the Tertiary Mollusca of Jamaica. 399 

 Mr. R. J. L. Guppy on Tertiary Echinoderms from the 



West Indies, and on Tertiary Brachiopoda from Trinidad 400 

 Dr. Young on the affinities of Platysomus, and on the 

 Scales of Uhizodus , 401 



