CONTENTS, 



VOL. VII. 



October 28, 1889. page 



By Pro- 



The President's Address ....... 



On Newton's Description of Orbits. By Dr C. Taylor . 

 On impulsive Stress in Shafting, and on Kepeated Loading, 

 fessor Karl Pearson ....... 



On Liquid Jets and the Vena Contracta. By H. J. Sharpe 



November 11, 1889. 



On the Varieties and Geographical Distribution of the common Dog- 

 Whelk {Purpura lapillus L.). By A. H. Cooke . . . . 13 



On the Increase in Thickness of the Stem of the Cucurbitacece. By 



M. C. Potter . 14 



On the Spinning Apparatus of Geometric Spiders. By C. Warburton . 1 6 



On a new Result of the Injection of Ferments. By E. H. Hankin . 16 



November 25, 1889. 



On the Relation between Viscosity and Conductivity of Electrolytes. 



By W. N. Shaw 21 



On the Finite Deformation of a Thin Elastic Plate. By A. E. H. Love 31 



On a Solution of the Equations for the Equilibrium of Elastic Solids 

 having an Axis of Material Symmetry, and its application to 

 Rotating Spheroids. By C. Chree . . . . . . .31 



On the Concomitants of Three Ternary Quadrics. By H. F. Baker . 32 



