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On Photographic Evidence of the Objective Eeality of Combination 

 Tones. By K. W. Forsyth, A.K.C.S., and R J. Sowter, A.RC.S. 

 Communicated by Professor Eiicker, Sec.E.S. (Plates 6, 7) 396 



On the Cytological Features of Fertilisation and Related Phenomena in 

 Pinus silvestri*, L. By Vernon H. Blackman, B. A., F.L.S., Hutchin- 

 son Student, St. John's College, Cambridge, and Assistant, Depart- 

 ment of Botany, British Museum. Communicated by Francis Darwin, 

 F.E.S : 400 



Experiments on Aneroid Barometers at Kew Observatory and their 

 Discussion. By C. Chree, Sc.D., LL.D., F.R.S., Superintendent 401 



On the Heat dissipated by a Platinum Surface at High Temperatures. 

 By J. E. Petavel, 1851 Exhibition Scholar. Communicated by Lord 

 Eayleigh, F.E.S. 403 



On a New Constituent of Atmospheric Air. By William Eamsay, 

 F.E.S., and Morris W. Travers 405 



On the Position of Helium, Argon, and Krypton in the Scheme of 

 Elements. By Sir William Crookes, F.E.S 408 



No. 400. 



Meeting of June 16, 1898, and List of Papers read 412 



Observations on Stomata. By Francis Darwin, F.E.S 413 



Mathematical Contributions to the Theory of Evolution. V. On the 

 Eeconstruction of the Stature of Prehistoric Eaces. By Karl 

 Pearson, F.E.S., University College, London 417 



The Nature of the Antagonism between Toxins and Antitoxins. By 

 C. J. Martin, M.B., D.Sc., Lond., Acting Professor of Physiology, 

 and Thomas Cherry, M.D., M.S., Melb., Demonstrator and Assistant 

 Lecturer in Pathology in the University of Melbourne. Communi- 

 cated by D. Halliburton, F.E.S 420 



On the Source of the Eontgen Bays in Focus Tubes. By Alan A. 

 Campbell Swinton. Communicated by Lord Kelvin, F.E.S... 432 



On the Companions of Argon. By William Eamsay, F.E.S., and Morris 

 W. Travers 437 



Summary of the Principal Eesults obtained in a Study of the Develop- 

 ment of the Tuatara (Spkenodon punctatum). By Arthur Dendy, 

 D.Sc., Professor of Bioloary in the Canterbury College, University of 

 New Zealand. Communicated by Professor G. B. Howes, F.E.S 440 



The Stomodfeum, Mesenterial Filaments, and Endoderm of Xenia. By 

 J. H. Ashworth, B.Sc., Demonstrator in Zoology, Owens College, 

 Manchester. Communicated by Professor Hickson, F.E.S 443 



On Surfusion in Metals ?nd Alloys. By W. C. Eoberts- Austen, C.B., 

 D.C.L., F.E.S. (Plates 8, 9) 447 



Experimental Investigations on the Oscillations of Balances. By D. 

 Mendeleeff, For. Mem. E.S 454 



