CONTENTS OF VOL. XXXII, 



(SIXTH SERIES). 





-r\ 



NUMBER CLXXXVIL— JULY 1916. 



Page 

 Lord Eayleigh on the Flow of Compressible Fluid past an 



Obstacle 1 



Dr. J. R. Airey on the Roots of Bessel and Neumann 



Functions of High Order. 7 



Dr. C. E. Weatherburn on Two Fundamental Problems in 



the Theory of Elasticity 15 



Dr. Manne Siegbahn and Mr. Einar Friman on the High- 

 Frequency Spectra (L-Series) of the Elements Tantalum- 

 Uranium. (Plate I.) 39 



Prof. D. N. Mallik and Mr. A. B. Das on Electric Discharge 



in a Transverse Magnetic Field. (Plate II.) 50 



Dr. L. Vegard on Results of Crystal Analysis. (Plate III.) 65 

 Mr. Sudhansukumar Bauer ji on Aerial Waves generated by 



Impact 96 



Mr. H. H. Poole on the Dielectric Constant and Electrical 



Conductivity of Mica in Intense Fields 112 



Mr. H. Ikeuti on the Tracks of the a Particles from Radium A 



in Sensitive Photographic Films. (Plate IV.) 199 



Mr. H. F. Biggs on the Decrease in the Paramagnetism 



of Palladium caused by Absorbed Hydrogen 131 



Miss E. W. Hobbs on the Change in the Resistance of a 



Sputtered Film after Deposition 141 



The Earl of Berkeley and Dr. C.V. Burton on a Semi-automatic 



High-Pressure Installation 153 



Mr. Gr. H. Livens on the Mechanical Relations of Dielectric 



and Magnetic Polarization 162 



Mr. B. C. Laws on the Strength of the Thin-plate Beam, held 

 at its ends and subject to a uniformly distributed Load 



(Special Case) 172 



Proceedings of the Geological Society : — 



Mr. Gr. W. Tyrrell on the Picrite-Teschenite Sill of Lugar 

 (Ayrshire) and its Differentiation 175 





