400 Index. 



Rudge, W. A. D., On the action of Radium and other salts on Gelatin, 258. 

 Ruhemann, S., Studies on unsaturated Ketonic compounds, 76. 



The action of acidchlorides of acetylenic acids on Ketonic com- 

 pounds, 313. 



The Dihydrotetrazines, 316. 



Ruhemann, S. and Merriman, R. W., Contributions to the Knowledge of the 



Tetrazoline group, 209. 

 Russell, H. N., Elected Associate 1904, Nov. 28, 176. 

 Ruthenium, Spark spectra of, etc. (Purvis), 325. 



Sawflies (Tenthredinidae), Maturation and early development of the un- 

 fertilized Egg in certain (Doncaster), 103. 



Searle, G. F. C., The expansion of a gas into a vacuum and the determina- 

 tion of the sj)ecific heat at constant pressure for gases, 241. 



Secondary Rontgen Radiation (Thomson), 322. 



Seed-bearing habit in the Lyginodendreee (Arber), 158. 



Seedlings of Peperomia, Note on some peculiar features in (Hill), 20. 



Sell, W. J., The Chlorination of Methyl derivatives of Pyridine. Part I : 

 2-Methyl Pyridine, 119. 



Seward, A. C, Notes on Cycads: with exhibition of a rare species (Cycas 

 Micholitzii) acquired by the Botanic Garden, 300. 



Sharpe, H. J., On the reflection of sound at a Paraboloid, Part II, 133. 



Shipley, A. E., Notes on a Collection of Parasites belonging to the Museum 

 of University College, Dundee, 95. 



Slowly moving Cathode rays. See Thomson. 



Sodium Vapour, Some physical properties of (Be van), 129. 



Spark length of Wimshurst Machine. See Palmer. 



Spark spectra of gold, antimony, bismuth, lead and tin, The influence of very 

 strong electro-magnetic fields on the (Purvis), 82. 



Spark spectra of palladium, rhodium and ruthenium, Influence of a very 

 strong magnetic field on the (Purvis), 325. 



Specific heat of gases. See Searle. 



Spectra, Theory of the widening of lines in (Thomson), 318. 



Stratton, F. J. M., Elected Fellow 1905, Nov. 13, 388. 



Susceptibility of Iron in Colloidal solution (Burton and Phillips), 260. 



Sweet-Peas (Lathyrus odoratus), Abortive development of the Pollen in 

 certain (Gregory), 148. 



Synthesis of Uric Acid, An attempted (Fenton), 25. 



Tetrazoline group, Contributions to the knowledge of the (Ruhemann), 209. 



Thomas, Miss M. B. and Jones, H. O., Some Optically Active Nitrogen 

 Compounds, 33. 



A series of optically active nitrogen compounds containing the 



Allyl group, 190. 



Thomson, J. J., On the vibrations of atoms containing 4, 5, 6, 7 and 8 

 corpuscles and on the effect of a magnetic field on such vibra- 

 tions, 39. 



