CONTENTS OF VOL. XXIII. FIFTH SERIES. Vll 



Mr. S. Bidwell on the Electrical Eesistance of Vertically- 

 suspended Wires 499 



Prof. L. Meyer on the Evolution of the Doctrine of Affinity . 504 



Prof. E. Meldola's Contributions to the Theory of the Con- 

 stitution of the Diazoainido-Compounds 513 



Sir W. Thomson on the Stability of Steady and of Periodic 

 Fluid Motion. — Maximum and Minimum Energy in Vortex 

 Motion .* 529 



Dr. Gr. Fae on the Variations in the Electrical Eesistance of 

 Antimony and Cobalt in a Magnetic Field 540 



Capt. P. A. MacMahon on the Differential Equation of the 

 most general Substitution of one Variable 542 



furious consequences of a well-known Dynamical Theorem, by 

 Dr. Gr. Johnstone Stoney 544 



On the Gaseous and Liquid States of Matter, by Drs. W. 

 Eamsay and S. Young 547 



Lecture Experiments on the Conductivity of Sound, by M. 

 Hesehus 548 



Index 549 



