Vll 



February 28, 1889. 



Page 



On the Spectra of Meteor-swarms (Group III). By J. Norman Lockyer, 

 F.RS 380 



On the M'agnetic Action of Displacement-currents in a Dielectric. By 

 Silvanus P. Thompson, D.Sc., B.A 392 



List of Presents.... .. 393 



An Investigation of a Case of gradual Chemical Change : the Interaction 

 of Hydrogen Chloride and Chlorate in presence of Potassium Iodide. 

 By W. H. Pendlebury, B.A., late Scholar of Christ's Church, Oxford, 

 Assistant Master of Dover College, and Margaret Seward, late Tutor 

 of Sonierville Hall, Oxford, Science Lecturer of Holloway College 396 



No. 278. March 7, 1889. 



List of Candidates 424 



On the Composition of Water. By Lord Kayleigh, Sec. RS 425 



On the "Wave-length of the principal Line in the Spectrum of the Aurora. 

 By William Huggins, D.C.L., LL.D., F.B.S 430 



On the Cranial Nerves of Elasmobranch Fishes. Preliminary Communi- 

 cation. By J. C. Ewart, M.D., Eegius Professor of Natural History, 

 University of Edinburgh 436 



List of Presents 436 



March 14, 1889. 



On the Organisation of the Fossil Plants of the Coal-measures. 

 Part XYI. By W. C. Williamson, LL.D., F.E.S., Professor of Botany 

 in the Owens College, Manchester 438 



A Method of examining Eate of Chemical Change in Aqueous Solutions. 

 By G. Gore, F.RS 440 



Eelative Amounts of Voltaic Energy of dissolved Chemical Compounds. 

 By G. Gore, F.RS 442 



Note on the Free Vibrations of an infinitely long Cylindrical Shell. By 

 Lord Eayleigh, Sec. RS 443 



List of Presents 448 



March 21, 1889. 



On the Velocity of Transmission through Sea-water of Disturbances of 

 large Amplitude caused by Explosions. By Eichard Threlfall, M.A., 

 Professor of Physics, and John Frederick Adair, M.A., Demonstrator 

 of Physics, University of Sydney 450 



An Experimental Investigation of the Circumstances under which a 

 Change of the Velocity in the Propagation of the Ignition of an Explo- 

 sive Gaseous Mixture takes placed in closed and open Vessels. Part I. 

 Chronographic Measurements. By Frederick J. Smith, M.A., Millard 

 Lecturer, Exptl. Mech., Triu. Coll., Oxford 451 



