viii SUGGESTIONS TO TEACHERS. 



should be carefully and neatly filled up from notes 

 previously arranged, and adjusted in every word and 

 sentence, so that there may be no erasures and no 

 interlining, and the Record may represent in every 

 particular the pupil's best work. Blank forms should 

 be drawn on the blackboard at every recitation, and 

 pupils be required to complete them, subject to the 

 criticism of the teacher and of the class as to analysis, 

 expression, style, spelling, punctuation, etc. 



A good microscope is essential to satisfactory 

 botanical work. Small hand magnifiers for the use 

 of the pupils and a larger table instrument for the 

 teacher, can be procured at a slight expense, of the 

 publishers of this book, Messrs. A. S. Barnes & Co., 

 in and 113 William St., New York. 



The course of investigation marked out in these 

 lessons is such that while it unfolds the general laws 

 of plant-structure and plant-life, it also leads to that 

 special knowledge of the plant itself which prepares 

 one to determine, by the use of analytical tables, its 

 name and place in the Vegetable System. Hence a 

 Descriptive Flora with tables for analysis is the 

 proper sequel or companion of this treatise. Such 

 a Flora can be obtained from the Publishers of this 

 book. With its aid the student can trace any unknown 

 plant which he examines to its Order and Name as 

 readily as one turns to a word in a Dictionary. 



A system of questions for study or review, gener- 

 ally applicable to all plants, will be found in the 

 Appendix. 



