76 HIE TEACHING BOTANIST 



then kept in a simple cover. For advanced students 

 this does very well, but is less excellent for beginners. 

 It is very difficult to keep notes and drawings together 

 in this way, and it allows of easy loss and constant 

 disarrangement. After trial of many systems I have 

 concluded that a book is best, and have invented a 

 special laboratory book which I have used for three 

 years to my great satisfaction. It is made of the best 

 quality of ledger paper 8^ x 6| inches, ruled on the 

 right hand page for notes and unruled on the left hand 

 for drawings, and is strongly bound in linen. It is made 

 by the Cambridge Botanical Supply Company, and a 

 sample is sent by them to teachers. Experience shows 

 that a thoroughly good book of this kind pays in many 

 ways, and particularly in the increased care students 

 give to the neatness and completeness of their work. 

 There is one kind of drawing of which the value grows 

 upon me year after year, namely, the generalized mor- 

 phological diagrams worked out in colors, often called 

 for in the Outlines in Part II of this book. (See partic- 

 ularly Figs. 15, 28, and their explanations.) To work 

 them out correctly necessitates the greatest clearness 

 of" ideas, and inculcates comparison and generalization 

 of the highest value. Indeed, such diagrams demand 

 thinking of mathematical exactness and clearness. The 

 coloring to show morphologically identical structures can 

 he added by water-colors, or by pencils which may be 

 Ix night in small boxes containing six colors. 



