XXVI PREFACE. 



practice ; and when we give our own gar- 

 dener orders to treat the celery after a 

 given fashion at a given stage of growth, 

 we are able to prophecy what results will 

 follow, by turning over a few more leaves 

 of our little manual and reading what its 

 experienced author says. 



The other hand-books of this series will 

 appear as rapidly as circumstances may 



permit. 



H. S. 0. 



New York, March, 1860. 



