to J)f..Johnfione*s Account of the 



Seme Account of the Life and Writings of the 

 late Professor Gregory, M. D. F. R. S.— » 

 By James Johnstone, M. D. and Soc. Reg. 

 Medi. Edinb. Socius. Communicated by Dr. 

 Barnes. Read December lo, 1783. 



JOHN GREGORY, M. D. F. R. S. Fellow 

 of the Royal College of Phyficians in Edin- 

 burgh, and ProfefTor of Medicine in the Univer- 

 fity of Edinburgh, born at Aberdeen in 1725^ 

 v/as third fon of James Gregory, M. D. Pro- 

 fefTor of Medicine in King's College, Aberdeen ; 

 and of Anne, daughter of the Rev. George 

 Chalmers, Principal of King's College there. 

 The family of Dr. Gregory is of great antiquity 

 in Scotland, and has for more than a century 

 paft produced a fuccelTion of Gentlemen, of the 

 firft diftindlion in the learned world. James 

 Gregory, ProfefTor of Mathematics, firft at St. 

 Andrews, and afterwards at Edinburgh, the 

 Doflor's grandfather, was one of the moft eminent 

 Mathematicians of the laft age, the age of Ma- 

 thematics. He invented the RefleflingTelefcope, 

 improved by Sir Ifaac Newton. His Optica 

 Promota, and other mathematical works, are Itill 

 in high efteem. 



David 



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