BELFAST 



NATURAL HISTORY & PHILOSOPHICAL SOCIETY 



SESSION 1889-90. 



$tk November, 



Professor E. A. Letts, Ph.D., F.R.S.E., F.C.S., 

 in the Chair. 



J. H. Greenhill, Esq., Mus. Baa, T.C.D., (the President of 

 the Society), read a Paper on WORK. 



The Lecturer said : — When elected President of the Natural 

 History and Philosophical Society for the ensuing year, I 

 realised how difficult it would be to do justice to the position, 

 bearing in mind the names of those who had been similarly 

 honoured, more especially that of my immediate predecessor, 

 Professor Letts, who on various occasions had favoured us 

 with such instructive and charming lectures. I also felt that 

 there were members who were more entitled to be elected than 

 I was, particularly one gentleman who had already dis- 

 tinguished himself by original research, and to whom, in 

 connection with their Hon. Secretary, Mr. Young, the Society 

 owes much of its present popularity : I refer to Mr. J. 

 Brown. Another difficulty with me was in connection with 

 the inaugural address, partly arising from the fact that two 

 subjects with which I am more acquainted than with others, 

 namely, electricity and music, had been already treated by me 

 in papers read before the Society. I had therefore to think 

 of something else which would possibly prove of some interest 

 to the members, and which came within my ability to expound, 

 and, believing that the various forms of mechanical and 



