|y TO THE 



j^^f^Rigbt Honpurahle 

 ' Sc' ' ■ 

 MoH Illuflriom 



THE 



President & Fellows 



OF THE 



ROTAL SOCIETT, 



The Folloxping 



DISCOURSE 



Is moji Humbly 



Preftnted 



By 



The Authour 



NEHEMIJB GREW, 

 A 3 TO 



