

VI. Some Phenomena of Stmtpots and of Terrestrial Magnetism. -Part II. By 

 C. CHRER, Sc.D., LL.D., F.R.S., Superintendent of Kew Observatory 



. . page 245 



VIL On the Diurnal Variations of the Earth's Magnetism produced by the Moon 

 and Sun. By S. CHAPMAN, B.A., D.Sc., Chief Assistant at the Royal 

 Observatory, Greenwich. Communicated by the Astronomer Royal . . 279 



VIII. A Critical Study of Spectral Series. Part HI. The Atomic Weight Term 

 and its Import in the Constitution of Spectra. By W. M. HICKS, 

 F.R.& ....... ."*.' . ".' 323 



IX. On the Self -inductance of Circular Coils of Rectangular Section. By T. R. LYLE, 



M.A., Sc.D., F.R.S. 421 



X. A Method of Measuring the Pressure. Produced in the Detonation of High 



Explosives or by the Impact of Bullets. By BERTRAM HOPKINSON, 

 F.R.S. . 437 



XI. Gravitational Instability and the Nebular Hypothesis. By J. H. JEANS, 



M.A.,F.R.S. 457 



Index to Volume 437 



