Trigonometrical Survey. 
SECTION SEVENTH. 
539 
Containing the secondary Triangles, in which two Angles only have 
been observed. The first seven intersected Places are intended for 
the small Instrument , on Account of their commanding Situations. 
Beachy Head from Ditchling Beacon 102132,4 Feet. 
No. 
Triangles. 
Angles 
observed. 
Distances of the stations from 
the point intersected. 
1 
Beachy Head 
IO 19 30 
jFirle Beacon - j 
Feet. 
47956 
Ditchling Beacon 
8 53 2 3 
55621 
Firle Beacon 
Sussex 
Chanctonbury Ring from the support of High Down 
Windmill 29442 feet. 
2 
Chanctonbury Ring 64 54 52 
High Down Windmill 
Sleep Down - 79 3 33 
Sleep Down - 
r !7 6 37 
l 27 J 59 
Butser Hill from Rook's Hill 60933,8 feet. 
3 
Butser Hill 
Rook's Hill 
Bow Hill 
10 28 4 
28 19 50 
}Bow Hill - { 
46150 
17668 
4 
Butser Hill 
Rook's Hill 
93 2 5 15 
39 2 3 59 
jPortsdown Hill { 
52729 
82926 
Ports down Hill 
Hampshire 
Dunnose from Motteston Down 55104,3 feet. 
, 5 
Dunnose 
Motteston Down 
Thorness 
3 ° 34 9 
7 9 6 47 
}Thorness 
Isle of Wight 
5747 ° 
29764 
