116 Nature protected 
Oldenburg 
Two primeval forest reserves exist. 
In the forest district of Hasbruch, 
about 765 acres, and in the forest 
district of Neuenburg, about 1,185 
acres, have been preserved. Both 
are well known, the last under the 
name of Neuenburger Urwald." They 
are chiefly formed of beeches, horn- 
beams, and oaks ; but the following 
also occur : — AlnuSy Corylus Avellana, 
Prunus spinosa, Crataegus Oxyacanthay 
Ilex Aquifolium, and Rhamnus Fran- 
gula. The oaks in particular are very 
large, as, for example, the ''Thick Oak," 
the stem of which, at a height of i m, 
has a circumference of about 9 m, 
and the **Amalia Oak," the stem of 
which, at a height of 1*3 m, has a cir- 
cumference of 9*4 m. 
