Vi CONTENTS OP VOL. VI. — FOURTH SEMES. 



Page 

 Dr. Barry on a Main Cause of Discordant Views on the Struc- 

 ture of the Muscular Fibril. (With a Plate.) 364 



Dr. Barry's Further Remarks on the Muscularity of Cilia. (With 



a Plate.) 372 



Mr. J. J. Sylvester on a Generalization of the Lagrangian 



Theorem of Interpolation 374 



Mr. A. Cayley's Correction of two Theorems relating to the 



Porism of the in-and-circumscribed Polygon 376 



Proceedings of the Royal Astronomical Society 378 



On Thermic Conduction in Metals, by G. Gore, Esq 382 



Researches on Evaporation, by Professor Marcet of Geneva . . 385 

 On an unusual Luminous Appearance in the Sky, by N. S. Hei- 



ueken, Esq 387 



On the employment of Heat, Sulphuric Acid, and Deutoxide of 

 Manganese in Bunsen's Battery, and on a means of greatly 

 diminishing the cost of Nitric Acid for this Battery, by F. P. 



Leroux 388 



Analysis of Auriferous Quartz, by A. B. Northcote, Assistant 



at the Royal College of Chemistry 390 



Dr. Martin Barry's Contributions to Embryology 391 



Meteorological Observations for September 1853 391 



Table , . . 392 



NUMBER XLL— DECEMBER. 



Prof. Stokes on the Metallic Reflexion exhibited by certain Non- 

 metallic Substances 393 



Mr. W. J. M. Rankine's General View of an Oscillatory Theory 

 of Light 403 



Mr. A. Cayley on the Geometrical Representation of an Abelian 

 Integral 414 



Dr. Wrightson's Remarks on Professor Williamson's Othyle 

 Theory 418 



Prof. Magnus on the Origin of Tar in defiant Gas 420 



Mr. A. Cayley on a Property of the Caustic by Refraction of 

 the Circle 427 



Mr. W. J. M. Rankine on a proposed Barometric Pendulum, 

 for the Registration of the Mean Atmospheric Pressure during 

 long Periods of Time 432 



Mr. T. Dobson on the Theory of Cyclones, Waterspouts, &c. . 438 



Mr. J. Cockle's Fragment on Multiplicity of Values 444 



Remarks on Lunar Circles, by A. Quetelet 448 



On the Motion of Elastic Fluids, and the Theory of Wind In- 

 struments, by A. Masson 449 



Observations on some Effects produced by Electric Currents, 

 by A. Masson 451 



On the Formation of Crystalline Minerals, by A. Drevermann. 453 



