CO MM 



CONTENTS OF VOL. XLVIII. 



(FIFTH SEELES). 



NUMBEE CCXC.— JULY 1899. 



Page 

 Messrs. Charles W. Waidner, Jr., arid Francis Malloiy on 

 a Comparison of Eowland's Mercury Thermometers with a 

 Cailenclar-Griffiths' Platinum Thermometer ; a Comparison 

 of the Platinum Thermometer with a Tonnelot Thermometer 

 standardized at the Bureau International ; and a Eeduction 

 of Eowland's Value of the Mechanical Equivalent of Heat to 



the Paris Nitrogen Scale ] 



Mr. S. E. Milner and Prof. A. P. Chattock on the Thermal 



Conductivity of Water 46 



Prof. C. G. Knott on Eeflexion and Eefraction of Elastic 



Waves, with Seismological Applications 04 



Prof. J. C. Beattie on the Leakage of Electricity from Charged 



Bodies at Moderate Temperatures 97 



Mr. E. F. J. Love on the Joule-Thomson Thermal Effect : its 

 Connexion with the Characteristic Equation, and some of 



its Thermodynamical Consequences , 106 



Mr. G. "V. MacLean on the Velocity of Electric Waves in 



Air. (Plate I.) 115 



Dr. H. Starke's Eeply to the Investigation of Mr. A. A. 



Campbell Swinton " on the Eeflexion of Cathode Eays " . . 132 

 Eev. 0. Fisher on the Eesidual Effect of a Former Glacial 



Epoch upon ITnderground Temperature 134 



Dr. E. H. Barton and Prof. W. B. Morton on the Criterion 



for the Oscillatory Discharge of a Condenser 143 



Dr. E. H. Barton and Prof. W. B. Morton : Supplementary 

 Note to Paper " On the Criterion for the Oscillatory Dis- 

 charge of a Condenser " 148 



Lord Eayleigh on the Theory of Anomalous Dispersion .... 151 



Dr. John Henderson on Cadmium Standard Cells 152 



Dr. C. Chree on Denudation and Deposition 156 



