N T E N T S. 

 VOL. L. 



No. 302. June 4, 1891. 



Page 



Election of Fellows 1 



Experiments 011 the Discharge of Leyden Jars. By Oliver J. Lodge, 

 F.E.S 2 



On a Determination of the Mean Density of the Earth and the Gravita- 

 tion Constant by means of the Common Balance. By J. H. Poynting, 

 D.Sc., F.RS., Professor of Physics, Mason College, Birmingham 40 



On the Pressure of Wind on Curved Vanes. By W. H. Dines, B.A 42 



Quadrant Electrometers. By W. E. Ayrton, F.R.S., J. Perry, F.RS., 

 and W. E. Sumpner, D.Sc 53 



Researches on the Absorption of Oxygen and Formation of Carbonic 

 Acid in ordinary Human Respiration and in the Respiration of Air 

 containing an Excess of Carbonic Acid. By William Marcet, M.D., 

 F.RS 58 



List of Presents 76 



June 11, 1891. 



On some Test Cases for the Maxwell-Boltzmann Doctrine regarding Dis- 

 tribution of Energy. By Sir William Thomson, D.C.L., P.R.S 79 



On Electrical Evaporation. By William Crookes, F.RS 88 



A Study of the Plante" Lead-Sulphuric Acid- Lead Peroxide Cell, from a 

 Chemical Stand-point. Part I. By G. H. Robertson 105 



A Study of the Plaute Lead-Sulphuric Acid-Lead Peroxide Cell, from a 

 Chemical Stand-point. Part II. A Discussion of the Chemical 

 Changes occurring in the Cell. By H. E. Armstrong, F.R.S., and 

 G. H. Robertson 108 



On the Influence of Temperature upon the Magnetisation of Iron and 



other Magnetic Substances. By Henry Wilde, F.RS 109 



List of Presents 118 



June 18, 1891. 



Results of Hemisection of the Spinal Cord in Monkeys. By Frederick 

 W. Mott, M.D., B.S., M.RC.P ". 120 



The Origin and Progressive Motions of Cyclones in the Western India 

 Region. By W. L. Dallas 121 



Note on the Density of Alloys of Nickel and Iron. By J. Hopkinson, 

 F.RS .. 121 



