List of Contents


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I. The Electric Field of Overhead Thunderclouds. By S. K. BANERJI. (Plates 16)

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II. The Principal Constituent of the Tides in the English and Irish Channels. By A. T. DOODSON and R. H. CORKAN


III. Further History of a Quartz Thread Gravity Balance. By Sir RICHARD THREFALL. F.R.S., and A. J. DAWSON


IV. A New Apparatus for Determining the Relationship between WaveLengths of Light and the Fundamental Standards of Length. By J. E. SEARS and H. BARRELL. (Plates 7 and 8)


V. On the Saturation Pressures of Steam (170 to 374° C.. By A. EGERTON. F.R.S., and G. S. CALLENDAR. (Plate 9)


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)


VII. Investigations on MagneCrystallic Action. I  Diamagnetics. By K.S. KRISHNAN. B. C. GUHA and S. BANERJEE


VIII. The Differential Equations of Ballistics. By C. A. CLEMMOW


IX. On the Problem of the Most Efficient Tests of Statistical Hypotheses. By J. NEYMAN and E. S. PEARSON


X. On the Theory of ViscoElasticity: A Thermodynamical Treatment of ViscoElasticity, and some Problems of the Vibrations of ViscoElastic Solids. By J. H. C. THOMPSON


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


XII. The Tightness of the Teeth, considered as a Problem concerning the Equilibrium of a Thin Incompressible Elastic Membrane. By J. L. SYNGE
