I iii J 



CONTENTS. 



(A) 

 VOL. 203. 



List of Illustrations . p ;icfe v 



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I. On the Propagation of Tremor* over the Surface of an Elastic Solid. By HORACE 

 LAMB, F.R.S. .................. 



II. On the Structure of Gold-Leaf, and the Alsorptiori Spectrum of Gold. By 



J. W. MALLET. F.R.S., Professor of Chemistry in the University of 

 Virginia ............ ......... 43 



III. Mathematical Contributions to the Tlteory of Evolution. XII. On a Generalised 



Theory of Alternative Inheritance, trith special Reference to MENDEL'S Lmi:s. 

 By KARL PEARSON, F.R.S ................. 5;i 



IV. On the Acoustic Shadow of a. Sphere. Si/ LORD RAYLEIGH, O.M., F.R.S. 



With an Appendix, giving the Values of LEGEXDRE'S Functions from P to P 20 

 at Intervals of 5 degrees. By Professor A. LODGE ........ 87 



V. On the Integrals of the Squares of Ellipsoidal Surface Harmonic Functions. By 



G. H. DARWIN, F.R.S., Plumian Professor and Fellow of Trinity College, in 

 the University of Cambridge ............... Ill 



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