PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



, ^tfV CONTENTS. 



PAGE 



The Influence of Stress and Strain on tlie Physical Properties of Matter. 

 Part I. Elasticity — continued. The Telocity of Sound in Metals and a 

 Comparison of their Moduli of Longitudinal and Torsional Elasticities as 

 determined by Statical and Kinetical Methods. By Heebeet Tomllnson, 

 B.A. . . . . . .88 



On the present Position of the Question of the Sources of the Nitrogen of 

 Vegetation, with some new Results, and preliminary Notice of New Lines 

 of Investigation. By Sir J. B. Lawes, Bart., LL.D., E.E.S., and J. H. 

 G-ilbeet, LL.D., F.E.S. Preliminary Notice 108 



November 17, 1887. 



I. Researches on the Spectra of Meteorites. A Report to the Solar Physics 

 Committee. Communicated to the Royal Society at the request of the 

 Committee. By J. Noeman Locktee, F.R.S 117 



II. Specific Inductive Capacity. By J. Hopkinson, M.A., D.Sc, F.R.S. . 156 



List of Presents . 161 



Obituary Notice : — 



John Aethue Phillips iii 



Price Two Shillings and Sixpence. 



