PEOCEEDINGS OF 

 THE ROYAL SOCIETY. 



vol. Lxn. No. 384. 



OFFICE LIBRARY 



Smithsonian Iustitution, 



CO NTENTS. - 



PAGE 



On the Determination of the Indices of Refraction of various Substances for 

 the Electric Ray. II. Index of Refraction of GTass. By Jagadis 

 Chundeb Boss, M.A., D.Sc, Professor of Physical Science, Presidency 

 College, Calcutta. Communicated by Lord Raylbigh, F.R.S. . . 293 



On the Influence of the Thickness of Air-space on Total Reflection of Electric 

 Radiation. By Jagadis Chundeb Bose, M.A., D.Sc, Professor of 

 Physical Science, Presidency College, Calcutta. Communicated by Lobd 

 Ratleigh, F.R.S. 300 



An Examination into the Registered Speeds of American Trotting Horses, 

 with Remarks on their Yalue as Hereditary Data. By Fbancis Q-alton, 

 D.C.L., F.R.S . 310 



Meeting of January 20, 1898, and List of Papers read 316 



The Homogeneity of Helium. By William Ramsay, Ph.D., LL.D., Sc.D., 



F.R.S., and Moeeis W. Teavees, B.Sc. . . . . . . .316 



Fergusonite, an Endotherinic Mineral. By William Ramsay, Ph.D., LL.D., 



Sc.D., F.R.S., and Moeeis W. Teavees, B.Sc 325 



Meeting of January 27, 1898, and List of Papers read ..... 329 



Meeting of February 3, 1898, and List of Papers read 330 



Note on the Experimental Junction of the Vagus Nerve with the Cells of the 

 Superior Cervical G-anglion. By J. N. Langlby, D.Sc, F.R.S., Fellow 

 of Trinity College, Cambridge 331 



Obituary Notices : — 



Samuel Haughton xxix 



William Fbancis Dbummond Jeevois xxxvii 



William Aecheb xl 



Price Two Shillings. 



February 7, 1898. 



