iv 



ADVERTISEMENT, 



It is in compliance with this suggestion that these 

 vohimes now appear as a distinct work, and (though 

 greatly enlarged by new matter) at a considerable 

 reduction of price ; but at the same time it is hoped 

 that a new edition of the two remaining volumes 

 will follow at a future period, when they will be also 

 given as a distinct work, comprising the anatomy, 

 physiology, orismology, &c. of the science. 



