CONTENTS. Vll 



Page 



Report of the Committee, consisting of Professor G. Caret Foster, 

 Lord Kelvin, Professor Atrton, Professor J. Perry, Professor W. 

 G Adams, Lord Raileigh, Dr. 0. J. Lodge, Dr. John Hopkinson, Dr. 

 A Mi:iRHEA.D, Mr. W. H. Preece, Mr. Herbert Taylor, Professor Everett, 

 Professor Schuster, Dr. J. A. Fleming, Professor G. F. Fitzgerald, 

 Mr R T. Glazebrook (Secretary), Professor Chrystal, Professor J. J. 

 Thomson, Mr. W. N. Shaw, Mr. J. T. Bottomlet, Mr. T. Gray, Professor 

 J. V. Jones, Dr. G. Johnstone Stoney, and Professor S. P. Thompson, 

 appointed for the purpose of constructing and issuing Practical Standards 



for use in Electrical Measurements 132 



Appendix L— Information circulated hy the Secretary for the Meeting 



of the Committee on August 4, 1892, with additional Notes 135 



Appendix II —On the Change of Resistance of Mercury with Tem- 

 perature. By M. G. GuiLLAUME 138 



Appendix III.— On a Special Form of Clark Cell. By Professor H. J. 



Carhar 12^ 



Appendix IV —On Wire Standards of Electrical Resistance. By Dr. 

 St Lindeck, Assistent bei der Physikalisch-Technischen Reichs- 



anstalt, Charlottenburg, Berlin 139 



Appendix V — On the Clark Cell. By Dr. Kahle 147 



Appendix VI.— On the Values of certain Standard Resistance Coils. 



By R. T. Glazebrook, F.R.S •••■ 150 



Appendix VII.— On the Standard Condensers of the Association, and 



on certain Resistance Coils. By R. T. Glazebrook, F.R.S 152 



Appendix VIII.— On the A^alues of certain Standards of Resistance and 

 Electromotive Force sent from Berlin for Comparison with the 

 British Association Standards. By R. T. Glazebrook, F.R.S 154 



Report of the Committee, consisting of Dr. John Kerr, Mr. R. T. Glaze- 

 brook, Lord Kelvin, and Professor A. W Rucker, on Electro-optics 157 



Appendix. On Dispersion in Double Refraction due to Electric Stress. 



By Dr. John Kerr 1^^ 



Eighth Report of the Committee, consisting of Sir G. G. Stokes (Chairman), 

 Professor A. Schuster, Mr. O. Johnstone Stoney, Sir H. E. RoscoE, 

 Captain W. de W. Abney, Mr. G. M. Whipple, Professor McLeod, and 

 Mr. G. J. Symons, appointed for considering the best methods of recording the 

 direct Intensity of Solar Radiation. (Drawn up by Sir G. G. Stokes) ... 158 



Report on Constants and Units. By C. E. Guillaume 165 



On the Application of Interference Methods to Spectroscopic Measurements. 

 By Albert A. Michelson 170 



Fourth Report of the Committee,consisting of Professor W. C. Roberxs-Austen 

 (Chairman), Sir F. Abel, Mr. E. Riley, Mr. J. Spiller, Professor J. W. 

 Langlby, Mr. G. J. Snelus, Professor Tilden, and Mr. Thomas Turner 

 (Secretary), appointed to consider the best method of establishing an Inter- 

 national Standard for the Analysis of Iron and Steel. (Drawn up by the 

 Secretary) 18^ 



Sixth Report of the Committee, consisting of Professor W. A. Tilden and 

 Professor H. E. Armstrong (Secretary), appointed for the purpose of inves- 

 tigating Isomeric Naphthalene Derivatives. (Drawn up by Professor Arm- 

 strong) 1^1 



Fourth Report of the Committee, consisting of Professor H. M'Leod, Mr. W. 

 C. Roberts- Austen (Secretary), Professor A. W. Reinold, and Mr. H. G. 

 Mad AN, appointed for continuing the Bibliography of Spectroscopy 192 



