VI 



by Prof. Silvanus Thompson, F.R.S., who brought to his duties that ever courteous and tactful 

 enthusiasm for work, for which he was so well known. Almost his last act before his lamented 

 death in June, 1916, was to correct and pass for press the Introductory Note which prefaced the 

 volume which precedes this. The Committee desires to gratefully acknowledge the high 

 services he rendered, and to join in the universal and deep regret felt at the loss to the world of 

 so great a man of science, so loving a personality, and such a faithful servant to the Royal 

 Society. 



April, 1918. 



