vii 



Page 



On a New Means of converting Heat Energy into Electrical Energy. By 

 WiUiard E. Case, of Auburn, New York, U.SA 345 



Further Discussion of the Sun-spot Spectra Observations made at Ken- 

 sington. By J. Norman Lockyer, F.R.S 347 



May 13, 1886. 



On the Structure of Mucous Salivary Glands. By J. N. Langley, M.A., 

 F.R.S., Fellow and Lecturer of Trinity College, Cambridge 362 



On the Computation of the Harmonic Components, &c. By Lieut. - 

 General Strachey, E.E., C.S.L, F.R.S 367 



On the Sympathetic Vibrations of Jets. By Chichester A. Bell, M.B 368 



Intensity of Badiation through Turbid Media. By Captain Abney, R.E., 

 F.R.S., and Major-General Festing, R.E \ 378 



May 20, 1886. 



Relation of ' Transfer-Resistance ' to the Molecular Weight and Chemical 

 Composition of Electrolytes. By G. Gore, LL.D., F.R.S 380 



A Study of the Thermal Properties of Ethyl Oxide. By William Ram- 

 say, Ph.D., and Sydney Young, D.Sc. 381 



On the Working of the Harmonic Analyser at the Meteorological Office. 

 By Robert H. Scott, F.R.S., and Richard H. Curtis, F.R.Met. Soc 382 



List of Presents 393 



No. Mb.— May 27, 1886. 

 Family-likeness in Eye-colour. By Francis Galton, F.R.S 402 



A General Theorem in Electrostatic Induction, with Application of it 

 to the Origin of Electrification by Friction. By John Buchanan, B.Sc, 

 Demonstrator of Physics, University College, London 416 



Notes on Alteration induced by Heat in certain Vitreous Rocks ; based 

 on the Experiments of Douglas Herman, F.I.C., F.C.S., and G. F. 

 Rodwell, late Science Master in Marlborough College. By Frank 

 Rutley, F.G.S., Lecturer on Mineralogy in the Royal School of Mines . 430 



On the Relation between the Thickness and the Surface-tension of 

 Liquid Films. By A. W. Remold, M.A., F.R.S., Professor of Physics 

 in the Royal Naval College, Greenwich, and A. W. Rucker, M.A., 

 F.RS 441 



Experiments with Pressure on Excitable Tissues. By George J. Romanes, 

 F.R.S 446 



The Influence of Stress and Strain on the Physical Properties of Matter. 

 Part I. Elasticity — continued. The Effect of Magnetisation on the 

 Elasticity and the Internal Friction of Metals. By Herbert Tomlin- 

 son, B.A 447 



