PREFACE. 



vii 



disease : the man who pursues science for 

 its own sake, and not for the pride of pos- 

 session, will feel more gratitude towards the 

 surgeon who dislodges a cataract from the 

 mind's eye, than towards the one who re- 

 pairs the defect of the bodily organ. 



GOURDIE-HILL BY EkROL, 



Sept. 10. 1830. 



