142 Nature protected 
The War Office commanded that 
on military lands and waters a register 
should be made of natural monu- 
ments that they may be respected; 
and a copy of the register must be sent 
to the State Office. Further, these 
natural monuments are to be protected 
as much as possible. Two examples 
may be mentioned here. The exer- 
cise ground near Halle encloses a small 
moor with an interesting vegetation, 
which was threatened by cultivation. 
It was commanded that the land should 
remain unchanged, for the purpose of 
study. Again, in the neighbourhood of 
Fort Weichselmiinde, near the mouth 
of the Vistula, a habitat of Eryngium 
campestre, which has its eastern limit 
at this point, has been preserved. 
The Topographical Department 
of the General Staff has ordered that 
certain natural and prehistoric monu- 
ments are to be noted, and their posi- 
tions marked on the maps. A list of 
