VI 



No. 502. December 10, 1904. 



Air Resistance Encountered by Projectiles at Velocities up to 4500 Feet 

 per Second. By A. Mallock, F.R.S 267 



Theory of Amphoteric Electrolytes Part II. By James Walker, 

 F.R.S., University College, Dundee 271 



The Electrical Conductivity and other Properties of Sodium Hydroxide 

 in Aqueous Solution, as elucidating the Mechanism of Conduction. 

 By William Robert Bousfield, M.A., K.C., M.P., and Thomas Martin 

 Lowry, D.Sc., Lecturer in Physical Chemistry and Crystallography 

 at the Central Technical College. Communicated by Professor 

 H. E. Armstrong, F.R.S. (Abstract) 280 



The Refractive Indices of the Elements. By Clive Cuthbertson. Com- 

 municated by Professor F. T. Troutoii, F.R.S. (Abstract) 283 



Some Physical Characters of the Sodium Borates, with a New and 

 Rapid Method for the Determination of Melting Points. By Charles 

 Hutchens Burgess and Alfred Holt, Junr. Communicated by Pro- 

 fessor H. B. Dixon, F.R.S 285 



On the Group IV Lines of Silicium. By Sir Norman Lockyer, K.C.B., 

 LL.D., Sc.D., F.R.S., and F. E. Baxandall, A.R.C.Sc. (Plates 11 

 and 12) 296 



On Chemical Combination and Toxic Action as exemplified in Haemo- 

 lytic Sera. By Robert Muir, M.D., Professor of Pathology, Univer- 

 sity of Glasgow, and Carl H. Browning, M.B., Ch.B., Carnegie 

 Research Fellow, University of Glasgow. Communicated by Dr. C. J. 

 Martin, F.R.S 298 



On the Presence of Tyrosinases in the Skins of some Pigmented Verte- 

 brates. Preliminary Note. By Florence M. Durham. Communi- 

 cated by W. Bateson, F.R.S 310 



On the Structure and Affinities of Fossil Plants from the Palaeozoic 

 Rocks. V. On a New Type of Sphenophyllaceous Cone (Spheno- 

 phyllum fertile) from the 'Lower Coal-measures. By D. H. Scott, 

 M.A., Ph.D., F.R.S., Honorary Keeper of the Jodrell Laboratory, 

 Royal Botanic Gardens, Kew. (Abstract) 314 



No. 503. January 23, 1905. 



On the Convergence of Infinite Series of Analytic Functions. By 

 H. A. Webb, B.A., Fellow of Trinity College, Cambridge. Com- 

 municated by Professor A. R. Forsyth, Sc.D., LL.D., F.R.S. 

 (Abstract) _.. 315 



Memoir on the Theory of the Partitions of Numbers. Part III. By 

 Major P. A. MacMahon, Sc.D., F.R.S. (Abstract) 318 



Note on a Means of producing a High-voltage Continuous or "Perti- 

 nacious " Current. By Sir Oliver J. Lodge, F.R.S 319 



The Halogen Hydrides as Conducting Solvents. Part III. The 

 Transport Numbers. Preliminary Notice. By B. D. Steele. Com- 

 municated by Sir William Ramsay, K.C.B., F.R.S 320 



