THE TRANSLATOR'S\>;\Aa 



PREFACE. 



IN expressing the gratification which I must feel 

 at a third edition of my Work being so soon re- 

 quired, I have also to express my regret that 

 peculiar circumstances have compelled me to 

 leave it so many months out of print. 



The Translation will be found revised, innu- 

 merable errors of various descriptions corrected, 

 every accession of physiological knowledge up 

 to the present moment inserted, several points 

 fully discussed which before were too briefly 

 noticed, and consequently the amount of my 

 Notes very considerably increased. 



Many inadvertencies will no doubt still be dis- 

 covered, and so far from being displeased I shall 

 be grateful to have them pointed out, as well as 

 to have my opinions freely examined. For I 

 should blush to be reluctant in allowing to others 

 what I always claim myself, setttire quce velim, 



