iv 



Page 



On the Electrical Conductivity of FJ-"~ containing Salt Vapours. By 

 Harold A. Wilson, B.Sc. (Lond. k Vic), 1851 Exhibition Scholar. 

 Communicated by Professor J. J. T» nnson, F.R.S. 120 



On a Quartz-thread Gravity Balance. By Richard Threlfall, lately Pro- 

 fessor of Physics in the* University of Sydney, and James Arthur 

 Pollock, lately Demonstrator of Physics in the University of Sydney. 

 Communicated by Professor J. J. Thomson, F.E.S .. 123 



Data for the Problem of Evolution in Man. I. A First Study of the 

 Variability and Correlation of the Hand. By Miss M. A. Whitelev, 

 B.Sc, and Karl Pearson, F.R.S 12G 



Meeting of May 4, 1899, List of Candidates recommended for Election 

 and List of Papers read 152 



Impact with a Liquid Surface, studied by the aid of Instantaneous 

 Photographv. Paper II. By A. M. Worthington, M.A., F.R.S., 

 and R, S. Cole, M.A 153 



An Observation on Inheritance in Parthenogenesis. By Ernest 

 Warren, D.Sc, University College, London. Communicated bv Pro- 

 fessor W. F. R. Weldon, F.R.S 154 



Omjgena equina, Willd. : a Horn-destroying Fungus. By H. Marshall 

 Ward, D.Sc, F.R.S., Professor of Botany in the University of Cam- 

 bridge 158 



The External Features in the Development of Lepidosiren paradosca, 

 Fitz. By Graham Kerr. Communicated by A. Sedgwick, F.R.S 160 



The Thermal Expanson of Pure Nickel and Cobalt. By A. E. Tutton, 

 B.Sc Communicated by Professor Tilden, D.Sc, F.R.S 161 



On the Presence of two Vermiform Nuclei in the Fertilised Embryo- 

 sac of Labium Martaqon. By Ethel Sargant. Communicated by Dr. 

 D. H. Scott, F.R.S. ' 163 



No. 416. 



Meeting of May 18, 1899, and List of Papers read 165 



On a Self-recovering Coherer and the Study of the Cohering Action of 

 different Metals. By Jagadis. Chunder Bose, M.A., D.Sc, Professor 

 of Physical Science, Presidency College, Calcutta. Communicated 

 by Lord Rayleigh, F.R.S 1C6 



Bakerian Lecture.— The Crystalline Structure of Metals. By J. A. 

 Ewing, F.R.S., Professor of Mechanism and Applied Mechanics in 

 the University of Cambridge, and W. Rosenhain, 1851 Exhibition 

 Research Scholar, Melbourne University 172 



The Yellow Colouring Matters accompanying Chlorophyll, and their 

 Spectroscopic Relations." By C. A. Sehunck. Communicated by 

 Edward Schmick, F.R.S. (Plate 6) ; 177 



On the Chemical ( Ratification of the Stars. By Sir Norman Lockyer, 

 K.C.B., F.RS. (Plate 7) 186 



