ESSAYS 



AND 



OBSERVATIONS, 



PHYSICAL AND LITERARY. 



Read before the Philofophical S O C I E T Y In Edin. 

 BUECH, and publifhed by them. 



T O L U M E m. 



EDINBURGH: 



Printed for J O H N B A L F O U RV 



M,DCC,LXXI. 



