iv 



Page 



Preliminary Determination of the Wave-lengths of the Hydrogen 

 Lines, derived from Photographs taken at Ovar at the Ed ipse of the 

 Sun, 1900, May 28. By F. W. Dyson, M.A., Sec. EXS. Com- 

 municated by W. H. M. Christie, C.B., M.A., F.E.S 33 



On the Brightness of the Corona of January 22, 1898. Preliminary 

 Note. By H. H. Turner, D.Sc, F.R.S., Savilian Professor 36 



The Boiling Point of Liquid Hydrogen, determined by Hydrogen and 

 Helium Gas Thermometers. By James Dewar, M.A., LL.D., Pro- 

 fessor of Chemistry at the Eoyal Institution, and Jacksonian Pro- 

 fessor, University of Cambridge , 44 



No. 443. 



Meeting of February 14, 1901, and Proceedings 55 



On the Influence of Ozone on the Vitality of some Pathogenic and 

 other Bacteria. By Arthur Eansome, M.D., F.E.C.P., F.E.S., and 

 Alexander G. E. Foulerton, F.E.C.S 55 



On the Functions of the Bile as a Solvent. By Benjamin Moore and 

 William H. Parker. Communicated by Professor Schafer, F.E.S 64 



On the Application of the Kinetic Theory of Gases to the Electric, 

 Magnetic, and Optical Properties of Diatomic Gases. By George 

 W. Walker, B.A., A.E.C.Sc, Fellow of Trinity College, Cambridge, 

 Sir Isaac Newton Research Student. Commnnicated by Professor 

 Eucker, Sec. E.S 77 



Meeting of February 21, 1901, and Proceedings 78 



An Attempt to Estimate the Vitality of Seeds by an Electrical Method. 

 By Augustus D. Waller, M.D., F.E.S 79 



On a New Manometer, and on the Law of the Pressure of Gases 

 between 1*5 and 0*01 Millimetres of Mercury. By Lord Eayleigh, 

 F.E.S , * 92 



An Investigation of the Spectra of Flames resulting from Operations 

 in the Open-hearth and "Basic" Bessemer Processes. By W. N. 

 Hartley, F.E.S., Eoyal College of Science, Dublin, and Hugh 

 Eamage, A.E.C.Sc. I., St. John's College, Cambridge 93 



The Mineral Constituents of Dust and Soot from various Sources. By 

 W. N. Hartley, F.E.S., Eoyal College of Science, Dublin, and Hugh 

 Eamage, A.E.C.Sc. I., St. John's College, Cambridge „ 97 



Notes on the Spark Spectrum of Silicon as rendered by Silicates. By 

 W. N. Hartley, F.E.S , 109 



Some Additional Notes on the Orientation of Greek Temples, being 

 the Eesultof a Journey to Greece and Sicily in April and May, 1900. 

 By F. C. Penrose. M.A\, F.E.S 112 



Meeting of February 28, 1901, and Address to the King 115 



His Majesty's Eeply 116 



List of Papers read 116 



