CONTENTS, OF VOL. VlII,— FOVRTH SERIES. V 



Page 

 Sir W. R. Hamilton on some Extensions of Quaternions (con- 

 tinued) 261 



M. V. Regnault on the Elastic Forces of Vapours in vacuo and 

 in Gases, at different Temperatures ; and on the Tensions of 



the Vapours furnished by mixed or superposed Liquids 269 



Sir J. W. Lubbock's Note on a Graphical Method of clearing a 



Lunar Distance 280 



Dr. Barry's Attempt to show the Mode of Origin of the Cell- 

 Membrane, and the Nature of the Earliest Pores. — II. Re- 

 marks on the Article " Ovum" in the Cyclopaedia of Phy- 

 siology. (With a Plate.) 282 



Dr. Barry's Account of the Discoveries of Keber on the Poro- 

 sity of Bodies ; with Confirmations 287 



Prof. Dove on the bearing of the Barometrical and Hygrome- 

 trical Observations at Hobarton and the Cape of Good Hope 

 on the general theory of the Variations of Atmospherical Phse- 



nomena 294 



Prof. Sedgwick on the May Hill Sandstone, and the Palaeozoic 



System of England 301 



Proceedings of the Royal Society , . . 318 



Note on theProductionof Pyro-electricCurrents,byM.Becquerel. 323 



On Hydrocyanaldine, by A. Strecker 326 



Meteorological Observations for August 1854 327 



Table 328 



u: 



^0^ NUMBER LIII.— NOVEMBER. 



Mr. R. P. Greg's Observations on Meteorolites or Aerolites, 

 considered Geographically, Statistically, and Cosmically, ac- 

 companied by a complete Catalogue 329 



M. G. Wertheim on the double Refraction temporarily produced 

 in Isotropic Bodies (concluded) 342 



Mr. W. J. M. Rankine on the Expansion of certain Substances 

 by Cold 357 



Prof. Sedgwick on the May Hill Sandstone, and the Palaeozoic 

 System of England 359 



Dr. Barry's Account of the Discoveries of Keber on the Porosity 

 of Bodies ; with Confirmations (concluded) 370 



M. W. Beetz on the Magnitude of Galvanic Polarization .... 380 



M. A. Secchi on the Periodical Variations of Terrestrial Mag- 

 netism 385 



M. Matteucci on the Electricity of Flame, with Observations 

 by W. R. Grove, Esq 399 



On some new Derivatives of Chloroform, by Prof. Williamson. . 405 



Meteorological Observations for September 1854 407 



Table 408 



