VI 



Page 



On the Vibrations in the Field round a Theoretical Hertzian Oscillator. 

 By Karl Pearson, F.K.S., and Alice Lee, B.A., B.Sc., University 

 College, London 246 



Meeting of January 26, 1899, and List of Papers read 248 



On the Structure and Affinities of Fossil Plants from the Palaeozoic 

 Rocks. III. On Medullosa anglica, a new Representative of the 

 Cycadofilices. By D. H. Scott, ' M. A., Ph.D., F.R.S., Hon. Keeper 

 of the Jodrell Laboratory, Royal Gardens, Kew 250 



On the Nature of Electro-capillary Phenomena. I. Their Relation 

 to the Potential Differences between Solutions. By S. W. J. Smith, 

 M.A., formerly Coutts-Trotter Student of Trinity College, Cam- 

 bridge ; Demonstrator of Physics in the Royal College of Science, 

 London. Communicated by Professor A. W. Riicker, Sec. R.S 254 



No. 408. 



The Influence of Removal of the Large Intestine and Increasing Quan- 

 tities of Fat in the Diet on General Metabolism in Dogs. By 

 Vaughan Harley, M.D., Professor of Pathological Chemistry, Uni- 

 versity College, London. Communicated by Professor Victor Hors- 

 ley, F.R.S 255 



No. 409. 

 Meeting of February 2, 1899, and List of Papers read 307 



On the Refractive Indices and Densities of Normal and Semi-normal 

 Aqueous Solutions of Hydrogen Chloride and the Chlorides of the 

 Alkalis. By Sir John Conroy, Bart., M.A., F.R.S., Fellow and Bed- 

 ford Lecturer of Balliol College, and Millard Lecturer of Trinity 

 College, Oxford 308 



Sets of Operations in Relation to Groups of Finite Order. By A. N. 

 Whitehead, M.A., Fellow of Trinity College, Cambridge. Com- 

 municated by Professor Forsyth, F.R.S 319 



Note on the Enhanced Lines in the Spectrum of a Cygni. By Sir 

 Norman Lockyer, K.C.B., F.R.S. (Plate 6) 320 



On the Effects of Strain on the Thermo-Electric Qualities of Metals. 

 By Magnus Maclean, M.A., D.Sc. Communicated by Lord Kelvin, 

 F.R.S , 322 



The Constitution of the Electric Spark. By Arthur Schuster, F.R.S., 

 and G. Hemsalech 331 



Meeting of February 9, 1899, and List of Papers read 336 



On the Recovery of Iron from Overstrain. By James Muir, B.Sc., 

 Trinity College, Cambridge (1851 Exhibition Science Research 

 Scholar, Glasgow University). Communicated by Professor Ewing, 

 F.R.S !! 337 



A Soil Bacillus of the Type of De Bary's B. megatherium. By W. C. 

 Sturgis, M.A., Ph.D. Communicated by Professor H. Marshall 

 Ward, F.R.S 340 



