213 



Sucli defects as these, are, however, attributable rather to the 

 conditions under which the work was carried out than to any in- 

 tentional discrimination on the part of the author. A revision 

 can never assume the proportions of an entirely new book ; and 

 the attempt to remodel every feature of a portrait often destroys 

 the likeness. At least until the production of some more com- 

 prehensive and more modern volume Dr. Chapman's flora will be 

 indispensable to every student of southern botany. 



C. L. P. 



