Contents. 



vn 



May 25, 1896. page 



On the spectroscope used in connexion with the 25-inch refractor. By 



H. F. Newall 179 



On a suggestion for a form of spectroheliograph. By H. F. Newall . 179 



On the Period of the Earth's Free Eulerian Precession. By J. Larmor . 183 

 Note on a point in theoretical dynamics. By Sir Robert Ball . .193 

 On the maximum deviation of a ray of light by a prism. By Prof. 



A. Anderson 195 



On a method of discussing the plane sections of surfaces. By A. C. 



Dixon 198 



October 26, 1896. 



Annual General Meeting 201 



On the casts of Iguanodon bernissarteusis, Boulenger. By S. F. Harmer 202 



On the proposed relationship of Birds and Dinosaurs. By H. Gadow . 204 



On Cyclostomatous Polyzoa. By S. F. Harmer 208 



November 9, 1896. 



On the Nature of the Rontgen Rays. By Prof. Sir G. G. Stokes . . 215 

 On certain cases of Discharge in Vacuo and on the zigzag path of 



Lightning. By J. Monckman 216 



November 23, 1896. 



On the Superficial Colour of a Silver-Zinc Alloy. By C. T. Heycock 



and F. H. Neville 222 



On Thermometric " Fixed Points." By E. H. Griffiths . . . .224 



January 25, 1897. 



On some results obtained by staining the Brain with the Chrome-silver 



method (illustrated by photo-micrographs). By Dr Hill . . . 235 



On a possible explanation of the quinqueloculine arrangement of the 

 chambers in the young of the microsphcric forms of Trilocidina 

 and Biloculina. By J. J. Lister ....... 236 



On the theory of Osmotic Pressure. By J. Larmor .... 240 



February 8, 1897. 



On the Cathode Rays. By Prof. J. J. Thomson 243 



On Electricity in Gases and the formation of Clouds in Charged Gases. 



By J. S. Townsend 244 



I 



