INTRODUCTION 



A few strokes of the pencil will serve to indicate the size of a seed- 

 ling at different times, or the position of a tendril at certain hours of 

 the day, but in order to bring home the beauty of a flower which has 



FIGURE 2. A SPECIMEN RIGHT-HAND PAGE OF THE NOTE-BOOK, on which Outline Diagrams and 

 Water-colour Sketches have been made (see directions on page 4). 



been found for the first time, a finished picture in colour may be 

 necessary. In cases where time is short, and it is not possible or 



