CONTENTS.
(A)
VOL. 231.
List of Contents
iii
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I. The Electric Field of Overhead Thunderclouds. By S. K. BANERJI. (Plates 1-6)
1
II. The Principal Constituent of the Tides in the English and Irish Channels. By A. T. DOODSON and R. H. CORKAN
29
III. Further History of a Quartz Thread Gravity Balance. By Sir RICHARD THREFALL. F.R.S., and A. J. DAWSON
55
IV. A New Apparatus for Determining the Relationship between Wave-Lengths of Light and the Fundamental Standards of Length. By J. E. SEARS and H. BARRELL. (Plates 7 and 8)
75
V. On the Saturation Pressures of Steam (170 to 374° C.. By A. EGERTON. F.R.S., and G. S. CALLENDAR. (Plate 9)
147
VI. The Characteristics of a Deep Focus Earthquake: A Study of the Disturbance of February 20, 1931. By F. J. SCRASE. (Plates 10 and 11)
207
VII. Investigations on Magne-Crystallic Action. I - Diamagnetics. By K.S. KRISHNAN. B. C. GUHA and S. BANERJEE
235
VIII. The Differential Equations of Ballistics. By C. A. CLEMMOW
263
IX. On the Problem of the Most Efficient Tests of Statistical Hypotheses. By J. NEYMAN and E. S. PEARSON
289
X. On the Theory of Visco-Elasticity: A Thermodynamical Treatment of Visco-Elasticity, and some Problems of the Vibrations of Visco-Elastic Solids. By J. H. C. THOMPSON
339
XI. The Influence of Pressure on the Dielectric Constant of Carbon Dioxide up to 1000 Atmospheres between 25° and 150° C. By A. MICHELS and Mrs. C. MICHELS
409
XII. The Tightness of the Teeth, considered as a Problem concerning the Equilibrium of a Thin Incompressible Elastic Membrane. By J. L. SYNGE
435