Trigonometrical Survey. 
#3 
SECTION THIRD. 
Heights of the Stations. Terrestrial Refractions. 
art. i. Elevations and Depressions. 
At W ingreen. 
The ground at Bull Barrow 
depressed 
6 
At Nine Barrow Down. 
The ground at Black Down 
depr. 
3 
at Bull Barrow 
elevated 
1 
At Black Down. 
The ground at Nine Barrow Down 
depr. 
13 
at Charton Common 
depr. 
13 
at Mintern Hill 
- 
0 
at Bull Barrow 
depr. 
1 
at Pilsden - 
depr. 
0 
At Pilsden Hill. 
The ground at Black Down 
depr. 
11 
at Charton Common 
depr. 
28 
The horizon of the sea on the 6th of June, 
at 6 P. M. in a S. E. direction, nearly, depr. 
29 
At Bull Barrow. 
The ground at Wingreen 
depr. 
4 
at Mintern - - - 
depr. 
6 
at Black Down 
depr. 
10 
3 
2 9 
23 
2 6 
11 
o 
16 
30 
o 
39 
23 
33 
3 
39 
