CONTENTS OF VOL. XXVIII, 



(SIXTH SEEIES). 



NUMBER CLXIIL— JULY 1914. 



Page 



Prof. A. Gray : Notes on Hydrodynamics.— 1 1 



Prof. A. Gray : Notes on Hydrodynamics. — II 13 



Prof. W. M. Thornton on the Lost Pressure in Gaseous 

 Explosions 18 



Mr. J. Proudman on the Motion of Viscous Liquids in 

 Channels 30 



Dr. J. P. Dalton on a New Continuous-Balance Method of 

 Comparing an Inductance with a Capacity 37 



Dr. Herbert Edmeston Watson and Mr. Gostabehari Pal on 

 the Radioactivity of the Rocks of the Kolar Gold-Fields . . 44 



Mr. Gilbert Cook on the Collapse of Short Tubes by External 

 Pressure. (Plate I.) 51 



Dr. I. J. Schwatt : Note on a Definite Integral 57 



Dr. Max Planck on New Paths of Physical Knowledge .... 60 



Dr. Eva von Bahr on the Quantum-Theory and the Rotation- 

 Energy of Molecules 71 



Prof. J. S. Townsend on the Potentials required to Maintain 

 Currents between Coaxial Cylinders 83 



Prof. J. W. Nicholson on Atomic Structure and the Spec- 

 trum of Helium 90 



Prof. W. C. McC. Lewis on the Relation of the Internal 

 Pressure of a Liquid to its Dielectric Capacity and Permea- 

 bilility 104 



Dr. W. Marshall Watts on the Spectra given by Carbon and 

 some of its Compounds ; and, in particular, the "Swan'*' 

 Spectrum. (Plate II.) 117 



Mr. Allan Ferguson on the Shape of the Capillary Surface 

 inside a Tube of Small Radius, with other Allied Problems. 128 



Prof. W. M. Hicks on High-frequencv Spectra and the 

 Periodic Table * 139 



Mr. J. A. Tomkins on the Slip-Curves of an Amsler Plani- 

 meter 142 



Prof. J. R. Rydberg on the Ordinals of the Elements and 

 the High-frequency Spectra 144 



Mr. Allan Ferguson on the Forces acting on a Solid Sphere 

 in contact with a Liquid Surface (II.) 149 



Notices respecting New Books : — 



Mr. Frederick Soddy's The Chemistry of the Radio- 

 elements, Part II 154 



