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A Probable Cause, of the Yearly Variation of Magnetic Storms and 

 Aurora? By Sir Norman Lockyer, K.C.B., LL.D., F.R.b., a id 

 WUHam J. S Lockyer, M.A. (Camb.), Ph.D. (Gott), F.R.A.S., Chief 

 Assistant Solar Physics Observatory 



The Fossil Flora of the Culm Measures of North-west Devon, and the 

 Palseobotanical Evidence with regard to the Age of the Beds. By 

 E. A. Newell Arber, M.A., F.L.S., F.G.S., Trinity College, Cam- 

 bridge, University Demonstrator in Palaeobotany. Communicated 

 by Professor McKenny Hughes, F.E.S. (Abstract) 95 



The Lethal Concentration of Acids and Bases in respect of Paramoscium 

 aurelia. By J. O. Wakelin Barratt, M.D., B.Sc. Lond., British 

 Medical Association Research Student. Communicated by Sir Victor 

 Horsley, F.R.S 10 



Contributions to the Study of the Action of Sea-snake Venoms. 

 Part I. By Sir Thomas R. Fraser, M.D., F.R.S., Professor of Materia 

 Medica in the University of Edinburgh, and Major R. H. Elliot, 

 I. M.S., on Special Duty for Snake Venom Research, under the orders 

 of the Secretary of State for India. (Abstract) 104 



On the Action of the Venom of Bungarus cceruleus (the Common Krait). 

 By Major R. H. Elliot, I.M.S., W. C. Sillar, M.B., B.Sc., Lecturer on 

 Experimental Pharmacology, Senior Assistant in the Materia Medica 

 Department, University of Edinburgh, and George S. Carmichael, 

 M.B., Ch.B., Assistant in the Materia Medica Department, University 

 of Edinburgh. Communicated by Sir Thomas R. Fraser, M.D., 

 F.R.S. (Abstract) 108 



The Decomposition of Ammonia by Heat. By E. P. Permau, D.Sc., and 

 . G. A. S. Atkinson, B.Sc. Communicated by Sir William Ramsay, 

 K.C.B., F.R.S 110 



An Experiment Illustrating Harmonic Undertones. By Herbert 

 Knapman, B.A., Fellow of Emmanuel College, Cambridge, and Assist- 

 ant Lecturer in Mathematics at University College, Reading. Com- 

 municated by George J. Burch, D.Sc., F.R.S 118 



Further Note on the Remains of Elephas Cypriotes, Bate, from a Cave- 

 Deposit in Cyprus. By Dorothy M. A. Bate. Communicated by 

 Dr. Henry Woodward, F.R.S. (Abstract) 120 



The Absorption and Thermal Evolution of Gases occluded in Charcoal 

 at Low Temperatures. By Sir James Dewar, M.A., D.Sc., LL.D., 

 F.R.S., Jacksonian Professor, University, Cambridge, and Fullerian, 

 Royal Institution, London 122 



The Separation of the most Volatile Gases from Air without Lique- 

 faction. By Sir James Dewar, M.A., D.Sc., LL.D., F.R.S., Jacksoniau 

 Professor, University, Cambridge, and Fullerian, Royal Institution, 

 London 127 



No. 499. September 28, 1904. 



Oll ^n- Act i" of Wood on a Photographic Plate in the Dark. By 

 William J. Russell, Ph.D., F.R.S. (Abstract.) (Plate 7) 131 



On the Production of a Specific Gastrotoxic Serum. Preliminary Com- 

 munication. By Charles Bolton, M.D. ; B.Sc., M.R.C.P., Research 



