TO THE TEACHER. 



references. Exercises to be conducted out of school hours 

 may be assigned at the discretion of the teacher, but 

 generally it will be found that the best work is done in 

 the laboratory under his personal direction. 



In the majority of preparatory schools half a year is 

 given to botany. It is very desirable that the time should 

 be extended, but until this is done it is recommended 

 that the exercises be followed substantially as here out- 

 lined, with the omission of a part, or possibly the whole, of 

 the microscopic work. If the latter is undertaken, and a 

 reasonable amount of time is given to the study of different 

 families of plants in the spring, a full year will be needed. 



