THE FROG 3 



lines where only one is intended. Leave no gaps in outlines, 

 but draw even small granules with a complete and perfect 

 contour. The drawings are usually semi-diagrammatic, em- 

 phasizing certain features to be made clear to the exclusion 

 of others; this may necessitate arranging the parts in a 

 somewhat unnatural order. 



3. Care should be taken to represent the proportions ac- 

 curately. It is advisable to outline the drawings very faintly 

 at first, so that the lines may be readily erased if necessary. 

 In doing this use a very sharp pencil, preferably a hard one 

 (5H). After the correct form is secured, all lines should 

 be made sharp and clear. 



If the drawing is to be made bilaterally symmetrical, draw 

 a faint line down the middle of the page to represent the 

 axis of bilateral symmetry; this line will aid in keeping the 

 two halves alike, and may afterward be erased. 



4. Shading should be used only when necessary to differ- 

 entiate parts. The best method of shading is usually by 

 stippling that is, by the use of small round dots. Other 

 methods of shading should be used only by advice of the in- 

 structor. 



5. The drawings should be placed on the drawing paper 

 in such a way that when placed in the notebook covers they 

 will fall on the right-hand page of the open book. Only one 

 side of the drawing paper should be used. At the top of 

 each page or 'plate," midway between the two upper cor- 

 ners, write the name of the animal described. Each plate 

 should bear a number in Roman numerals in the extreme 

 upper right-hand corner (e. g., Plate I, Plate II, etc.), and 

 the student's name in the extreme upper left-hand corner. 

 The drawings of each page or plate should be numbered 



