VI I'REFACE. 



has been prepared. The invaluable assistance of tobacco- 

 planters in both the Indies and in many other tropical 

 countries, has rendered the portion relating to field opera- 

 tions eminently practical and complete, while the editor's 

 acquaintance with agricultural chemistry and familiarity 

 with the best tobacco-growing regions of Asiatic Turkey-, 

 have enabled him to exercise a general supervision over the 

 statements of the various contributors. 



