CONTENTS. 



PAGE 



On a Well-sinking, at Graveley, near Huntingdon. By the Rev. 0. 



Fisher 181 



On a Portable Gold-leaf Electrometer for Loiv or High Potentials, and 

 its application to Measurements in Atmospheric Electricity. By 

 C. T. R. Wilson 184 



A Series of Optically Active Nitrogen Compounds containing the Allyl 



Group. By Miss M. B. Thomas and H. 0. Jones . . . 190 



The Effect of Hydrogen on the Discharge of Electricity from Hot Platinum. . 

 By 0. W. Richardson 192 



Experiments on the Retention of an Electric Charge by Gases. By 



W. A. Douglas Rudge 194 



Polarization phenomena in the Eclipse 1905 August 30. By H. F. 



Newall . . ' . . . . 197 



The Effect of the Lunar Deflection of the Vertical on Latitude Observa- 

 tions. By B. Cookson . . . . . 198 



Suggestions for a theory of the Milky Way and the Clouds of Magellan. 



By Arthur R. Hinks . - . . . . . . . . _„'i 



Preliminary Communication on the Life- History of Pleistophora peri- 



planetae, Lutz and Splendore. By W. S. Perrin . . . . 204 



Contributions to the Knowledge of the Tetrazoline Group. By S. Ruhemann 



and R. W. Merriman . . . . 209 



Some experiments on Kanal-Strahlen. By Professor J. J. Thomson . 212 



On the Inheritance of Coat-colour in Rats. By L. Doncaster . .215 



On the Osmotic Pressure of Dilute Aqueous Solutions. By P. S. Barlow 229 



