VI 



March 21, 1878. 



Page 



Contact Theory of Voltaic Action. Parts I and TT. By W. E. Ayrton 



and John Perry, Professors in the Imperial College of Engineering, 

 Tokio, Japan 196 



On the Viscosity of Dielectrics. No. I. By W. E. Ayrton and John 

 Perry, Professors in the Imperial College of Engineering, Tokio, Japan 238 



Becent Experiments on Fog-Signals. By Dr. Tyndall, F.B.S., Professor 

 of Natural Philosophy in the Boyal Institution 245 



March 28, 1878. 



On Putrescent Organic Matter in Potable Water. II. By Gustav Bischof 258 

 On the Modifications of the Simple and Compound Eyes of Insects. By 



B. Thompson Lowne, F.B.C.S., Lecturer on Physiology at the Middle- 

 sex Hospital Medical School, Arris and Gale Lecturer on Anatomy and 

 Physiology in the Boyal College of Surgeons , 261 



Measurements of Electrical Constants. No. II. On the Specific Inductive 

 Capacities of Certain Dielectrics. By J. E. H. Gordon, B.A. Camb. 

 First Series 270 



On the Placentation of the Apes, with a Comparison of the Structure of 

 their Placenta with that of the Human Female. By William Turner, 

 M.B. Lond., F.B.S., Professor of Anatomy in the University of Edin- 

 burgh 271 



On the Thermo-Electric Properties of Liquids. By G. Gore, LL.D., F.E.S. 272 



List of Presents 273 



Researches in Spectrum Analysis in connexion with the Spectrum of the 

 Sun. By J. N. Lockyer, F.E.S 279 



No. 187.— April 4, 1878. 



On the Development of the Parasitic Isopoda. By J. F. Bullar, B.A. 

 Trinity College, Cambridge , 284 



On the Determination of the Constants of the Cup Anemometer by 

 Experiments with a Whirling Machine. By the Bev. T. B. Bobinson, 

 D.D., F.B.S., &c 286 



On the Action of Ozone on Nuclei. By Charles Tomlinson, F.E.S 290 



Notes on Physical Geology. By the Bev. Samuel Haughton, M.D. 

 Dublin, D.C.L., Oxon, F.E.S., Professor of Geology in the University 

 of Dublin 291 



April 11, 1878. 



The Acceleration of Oxidation caused by the Least Eefrangible End of 

 the Spectrum. By Captain Abney, E.E., F.E.S 291 



