xxxviii Proceedings. [May igtJi, igoj. 



" Essays ; while we admire the instinct that guided his views of 

 " the interactions of mixed gases and vapours, and the tenacity 

 " of his faith notwithstanding the disturbances which masked his 

 "efforts towards direct experimental confirmation. Thus the 

 "theoretical illumination which the genius of Clerk Maxwell has 

 "thrown on the nature of his law of the mutual independence of 

 " mixed gaseous media has not detracted from the credit of its 

 " first upholder. Nor has the want of the refined instrumental 

 "equipment that is necessary for the adequate development of 

 " the other fundamental principles which he affirmed ever 

 "diminished the admiration of his contemporaries and his 

 " successors for the achievements of his intellect. 



" The Royal Society congratulates the Literary and 

 " Philosophical Society of Manchester on having known 

 " how to embrace the privilege of providing a home for the 

 "scientific activity of their illustrious Member, who was after- 

 " wards for a long period their honoured President, and on 

 "having been the channel for the publication to the world of 

 "scientific advances that will maintain their importance through- 

 " out the ages to come, at a time when their author was to 

 "outward appearance only an inconspicuous private citizen in 

 " their community." 



Signed and sealed on behalf of the Royal Society of 

 London, 



WILLL'VM HUGGINS, 



President. 



Professor W. A. Tilden, F.R.S., next read an address from 

 the Chemical Society, which was as follows : — 



"The Chemical Society to the Literary and Philo- 

 " soPHicAL Society of Manchester, greeting : 



" Recognising the Atomic Theory as having been the founda- 

 " tion of scientific chemistry the Chemical Society desires to be 

 " associated with the Literary and Philosophical Society of 

 " Manchester in celebrating the Centenary of its Enunciation 

 " by John Dalton. 



