CONTENTS OF VOL. XXXIII 



(SIXTH SERIES). 



NUMBER CXCIIL— JANUARY 1917. 



Page 



Mr. Gr. A. Hemsalech on the Relative Behaviour of the Light 

 Radiations emitted by Iron Vapour under the Influence of 

 Thermal and Chemical Actions in Elauies. (Plate I.) . . . . 1 



Dr. H. E. Ives on Visual Diffiusivity 18 



Oapt. A. C. Egerton on the Vapour Pressure of Zinc, 

 Cadmium, and Mercury , 33 



Dr. R. T. Beatty on Energy Distribution in Spectra. — I. 

 (Plate II.) 49 



Dr. W. E. G-. Svvann on Equipartition of Energy and Ra- 

 diation Theory . . . . , 64 



Mr. Emil Hatschek on some simple Deformations of Homo- 

 geneous Partitionings of Space and the Increase of Internal 

 Surface generated thereby , , 83 



Dr. L. Silberstein on Molecular Refractivity and Atomic 

 Interaction 92 



Mr. M. Ishino on the Scattering and the Absorption of the 

 Gramma Rays 129 



Mr. E. A. Biedermann on the Energy in the Electro- 

 magnetic Eield 146 



Prof. A. Anderson on the Eocoinetry of Lens-Combinations. . 157 



Proceedings of the G-eological Society : — 



Mr. J. "W. Jackson on facetted pebbles from Pendleton 

 (Lancashire) 160 



