Vill ADVERTISEMENT TO THE SIXTH EDITION. 
It is in compliance with this suggestion that these volumes 
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, 
&e, of the science. 
