1 Introduction to Botany. 



There are three simple rules which the student should 

 keep in mind, (i) The drawings should be on a suffi- 

 ciently large scale to allow the smallest details to be put in 

 without crowding. (2) All parts must be in correct pro- 

 portion with reference to one another and in right relative 

 positions. (3) Some one dimension of the object should 

 always be used as a measuring rod in establishing the 

 lengths of the others. If these rules are followed, much 

 subsequent correction will be avoided. A very serviceable 

 notebook for the notes and drawings is afforded by the 

 No. 2 double and reversible note covers, opening at the 

 side, filled with a good quality of unruled linen ledger 

 paper. -^ 



The drawings should be symmetrically disposed over 

 the sheet without crowding, as shown in Fig. 74. They 

 should be made with a 6 H drawing pencil kept quite 

 sharp by rubbing it occasionally with a longitudinal to-and- 

 fro motion on a piece of No. O emery cloth or sandpaper. 

 Neither a soft nor a dull pencil should ever be used. The 

 descriptive notes, written in ink, should be on a separate 

 sheet facing the drawings, the parts of which are to be 

 lettered and referred to in the notes accordingly. Notes 

 written with a pencil are liable to smirch the drawings and 

 must not be tolerated. The student should strive for the 

 utmost accuracy and neatness in the drawings and notes ; 

 he should have a personal pride in them, for they repre- 

 sent his capabilities in seeing and interpreting facts with 

 which he has personally to deal. 



2. Procedure in Drawing. — After having determined the 



proper scale of the drawing, that is, whether its diameters 



should be twice as great, three times as great, etc., as those 



of the object, place points to establish the limits of the 



1 Made by Chas, W. Sever & Co., Cambridge, Mass. 



