Contents. 



May 16, 1892. page 



Recent advances in Astronomy with Photographic Illustrations. By 



H. F. Newall 330 



On the pressure at which the electric strength of a gas is a minimum. 



By Professor Thomson 330 



On a compound magnetometer for testing the magnetic properties of 



iron and steel. By G. F. C. Searle 330 



May 30, 1892. 



On the hypothesis of a liquid condition of the Earth's interior con- 

 sidered in connexion with Professor Darwin's theory of the genesis 



of the Moon. By 0. Fisher 335 



On Gynodicecism in the Labiatae. By J. C. Willis .... 348 



On the Steady Motion and Stability of Dynamical Systems. By 



A. B. Basset 351 



