VI CONTENTS OF VOL. XXVI. FOURTH SERIES. 



NUMBER CLXXVI.— NOVEMBER. 



Fage 

 The Astronomer Royal on the Numerical Expression of the 

 Destructive Energy in the Explosions of Steam-boilers, and 

 on its comparison with the Destructive Energy of Gunpowder. 329 

 MM. H. Sainte- Claire Deville and Troost on the Measurement 



of High Temperatures 336 



Archdeacon Pratt : The Mass of the Earth is arranged in nearly 

 spherical strata around its centre ; and if the outer surface be a 

 spheroid of equilibrium, then all the strata are so also, whether 



they acquired that form from once being fluid or not 342 



Prof. Potter on the Laws of the Expansion of the Transparent 



Liquids by Increase of Temperature 347 



Mr. F. A. Abel on some results of Experiments instituted with 



Lucifer Matches and others ignited by friction 355 



Prof. Rose on a new Series of Metallic Oxides 363 



Prof. Cay ley on Differential Equations and Umbilici 373 



Mr. W. Odling's Remarks on Chemical Notation 380 



Prof. Tyndall on Laplace's Correction for the Velocity of Sound. 384 

 Dr.W. J. M. Rankine on the Application of Bary centric Perspec- 

 tive to the Transformation of Structures 387 



Dr. W. J. M. Rankine on the Expansive Energy of Heated 



Water . . 388 



Proceedings of the Royal Society : — 



Lieut.-Col. H. Clerk on the Change of Form assumed by 

 Wrought Iron and other Metals when Heated and then 



Cooled by partial Immersion in Water 391 



Remarks on some new Algebraic Symbols in Part I. of the Phi- 

 losophical Transactions for 1862, by S. M. Drach 406 



On a particular case of the Formation of Soap-bubbles, by 



M. Felix Plateau 407 



Note on Albert Durer's Heptagon-chord, by S. M. Drach. . . . 408 



NUMBER CLXXVIL— DECEMBER. 



Mr. T. Graham on the Molecular Mobility of Gases 409 



Mr. J. Mickle on Thermo- electrical Currents from the Conden- 

 sation of Vapour, and the Evaporation of Water 435 



Dr. W. J. M. Rankine on the Expansive Energy of Heated Water 436 

 Mr. C. Tomlinson on the Spheroidal Condition of Liquids at 



Common Temperatures 437 



Prof. Cay ley on Differential Equations and Umbilici 441 



Prof. Williamson on the Dynamics of the Galvanic Battery . . 452 

 Mr. E. V. Neale on the Numerical Relations of the Distances 



between the Planets and Sun 462 



Prof. Challis on the Theory of Double Refraction on the Undu- 



latory Hypothesis of Light 466 



Proceedings of the Royal Society : — 



Dr. Gladstone and the Rev. T. P. Dale on the Refraction, 

 Dispersion, and Sensitiveness of Liquids 484 



