Xiv CONTENTS. 



Page 

 4. On a Magnetic Balance and its Practical Use. By Dr. II. E. J. G. DU Bois 654 



6. Report of the Committee on Electrical Standards 654 



6. On Wire Standards of Electrical Resistance. By Dr. St. Lindeck 654 



7. On the Clark Cell. By Dr. K. Kahle 654 



8. A Discussion on the Nomenclature of Units, opened by Professor 



Oliver J. Lodge, F.R.S 654 



9. On the Dielectric of Condensers. By W. H. Preece, F.R.S 654 



10. Earth-currents. By W. H. Preece, F.R.S 656 



11. On the Physics of the Voltaic Arc. By Professor Silvanxts P. Thomp- 

 son, F.R.S 657 



12. Preliminary Note on the Temperature Variation of the Magnetic Permea- 

 bility of Magnetite. By Edwin H. Barton, B.Sc, and W. Wil- 

 liams, B.Sc 657 



13. On the Spectrum of Liquid Oxygen, and on the Refraction Indices of Liquid 

 Oxvffen, Nitrous Oxide, and. Ethylene. By Professor G. D. Liveing, 

 F.R.S., and Professor J. Dewar, F.R.S 658 



WEBNESDAT, AUGUST 10. 



1. Interim Report of the Committee on Recalescence 658 



2. The Magnetic Curve. By the Rev. F. J. Smith, M.A 659 



3. Certain Volume Effects of Magnetisation. By Professor Cargill G. 

 Knott, D.Sc, F.R.S.E 659 



4. On Polarising Gratings. By Dr. II. E. J. G. Dtr Bois 660 



5. An Estimate of the Rate of Propagation of Magnetisation on Iron. By 

 Professor G. F. Fitzgerald, F.R.S 660 



6. Remarks on the Early Rise and Progress of Electrical Illumination. By 



Dr. Alexander Keiller 660 



7. Report of the Committee on Electro-optics 660 



8. On Dispersion in Double Refraction due to Electric Stress. By Dr. 

 John Kerr 660 



9. Proof that Densitv of Illumination does not affect Absorption. By W. 

 Peddie, D.Sc ." 661 



10. Physical Conditions of the Waters of the English Channel. By H. N. 

 Dickson, F.R.S.E 661 



11. On the Analysis and Synthesis of Colour. By J. W. Lovibond 661 



1 2. On the General Laws of Energetics. By Professor W. Ostwald 661 



13. On a Delicate Calorimeter. By J. A. Haeker, D.Sc, and P. J. Haetog, 

 B.Sc 662 



14. Some Notes connected with the Electromotive Force of a Secondary Bat- 

 tery. By Dr. J. H. Gladstone, F.R.S., and W. IIibbeet 662 



