ILLUSTRATIONS 
PAGE 
Figure 
I. 
Chart of the stations of Gen- 
tiana lutea in Wiirttemberg 
40 
Figure 
2. 
Portion of a Prussian forest- 
map, showing the geographi- 
cal Hmit of the Spruce Fir 
{Picea excelsd) 
41 
Figure 
3. 
Chart showing the nesting- 
places of four birds of 
Switzerland .... 
43 
Figure 
4- 
Marking of a rare tree {Pyrus 
torminalis) . to face page 
46 
Figure 
5- 
Burnham Beeches, preserved 
by the Corporation of London 
to face page 
72 
Figure 
6. 
Carboniferous Forest, Victoria 
Park, Glasgow . to face page 
74 
Figure 
7. 
Natural Monuments preserved 
by the National Trust . 
76 
Figure 
8. 
Chart of French State Forest, 
showing portions protected 
by law 
106 
Figure 
9- 
Memmert Island, a Govern- 
ment Sanctuary of Birds . 
130 
Figure 
10. 
National Parks of the United 
States of America 
166 
