INTRODUCTION 23 



vegetables and flowers. A preliminary lesson should review 

 this practical information and use it as a means of judging 

 the proper cultural methods. Then the class will turn to the 

 book with interest and compare their conclusions with those 

 based on longer experience. If some then prefer their own 

 way, well and good; they will then give special care to the 

 succeeding experiment to see how far they may be right. 



