VI PREFACE. 



managing horticultural structures, render the works 

 of that period of little value to gardeners at the 

 present day. I have here given all the latest im- 

 provements and most approved methods at present 

 in use, with plans and suggestions for their further 

 improvement. 



From what has been said, I hope no one will sup- 

 pose that this treatise is given as a complete work 

 on Exotic Horticulture. Much has yet to be learned, 

 on many points connected with hot-houses, which 

 futurity will, no doubt, unfold. 



My warmest expressions of thanks are due to 

 Professor Dana, of Yale College, for the generous 

 manner in which he has favored me with his opinions. 

 The readiness with which that gentleman has replied 

 to my inquiries, on matters of science relating to 

 my subject, even in the midst of his laborious literary 

 pursuits, shows how willing he is to aid the most 

 humble inquirer. This expression of thanks is due 

 from me here, as the only way in which I can suf- 

 ficiently show the high value at which I estimate 

 his kindness and liberality. 



K. B L. 



Boston, Oct. 3, 1850. 



