CONTENTS OF VOL. XXXIII. FOURTH SERIES. V 



Page 

 Notices respecting New Books : — The Rev. J. Hunter's Modern 



Arithmetic, and an Easy Introduction to Conic Sections . . 223 

 Proceedings of the Royal Society : — 



Messrs. B. Stewart and P. G. Tait on the Heating of a 



Disk by rapid Rotation in vacuo . . . a 224 



Proceedings of the Geological Society : — 



Mr. W. B. Dawkins on the Age of the Lower Brick Earths 



of the Thames Valley 233 



On the Spectra of the Meteors of November 13-14, 1866, by 



John Browning, Esq 234 



Experiments on the Expansion of Superheated Steam, by MM. 



G. A. Hirn and A. Cazin 236 



Induction-currents on twisting Iron Wires through which a Gal- 

 vanic Current is passed, by G. Wiedemann 238 



On the Application of the Tuning-fork to Horology, by M. 

 Niaudet-Breguet 240 



NUMBER CCXXIIL— APRIL. 



Prof. A. de la Rive on the Propagation of Electricity in highly 

 Rarefied Elastic Fluids, and in particular on the Stratifica- 

 tions of the Electric Light in very rare media 241 



Archdeacon Pratt : What changes can be made in the arrange- 

 ment of the materials of the mass of a Body, its external form 

 remaining the same, without affecting its attraction on an 



external particle ? 261 



Mr. B. A. Murray on a rigorous Demonstration, by elementary 

 Geometry, of the Proposition usually classed as the Twelfth 



Axiom of Euclid 264 



M. G. van der Mensbrugghe on the Tension of Liquid Films. . 270 

 Mr. G. Forbes on the Meteoric Shower of November 1866 . . 282 



Mr. J. P. Harrison on Radiation and Vapour 283 



Mr. W. F. Barrett on Sensitive Flames 287 



Sir David Brewster's Additional Observations on the Polariza- 

 tion of the Atmosphere, made at St. Andrews in 1841, 1842, 



1843, 1844, and 1845 290 



Proceedings of the Royal Society : — 



The Rev. G. C. Hodgkinson's Actinometrical Observations 

 among the Alps, with the Description of a New Actino- 



meter 304 



Proceedings of the Geological Society : — 



Mr. G. Maw on the occurrence of Consolidated Blocks in 

 the Drift of Suffolk, and on some Chemical Analyses of 



variegated Strata 3X4 



On the Thermal Radiation produced by Fluorescence, by Pro- 

 fessor Victor Pierre of Prague 3] 6 



On the Dynamic Theory of Deep-sea Tides, by E. J. Stone, Esq. 318 

 On the Direction of Vibrations in Polarized Light, by M. Mascart. 319 



