Trigonometrical Survey. 
505 
No. of 
triangles. 
Names of stations. 
Observed 
angles. 
Diff. 
Spheri- 
cal 
excess. 
Error. 
Angles corrected 
for calculation. 
Distances. 
XXXV. 
Brightling 
CrowboroughBeacon 
Ditchling Beacon 
0 , // 
43 2 9 M 
105 2 44 
3 1 28 17,75 
— 0,16 
— 0,76 
— 0,22 
" 
" 
O / // 
43 29 1 
105 2 42 
31 28 17 
eacon 
>n 
Feet. 
61597,6 
113942,3 
180 0 3,25 
Bright 
i”g { 5 
1,14 
Drowboi 
Oitchlin 
+ 2,11 
rough B 
g Beacc 
XXXVI. 
Beachy Head 
Ditchling Beacon 
Brightling 
73 58 26,5 
46 32 19 
59 29 14 
— °>77\ 
— 0,56! 
— 0,64 
73 58 26,5 
46 32 19,5 
59 29 H 
102132,4 
86048 
l 79 59 59»5 
Beachy t 
lead | ] 
2,0 
Ditchlin 
Srightlii 
-2,5 
S 
'g 
JCXXVII. 
Fairlight Down 
Brightling 
Beachy Head 
59 33 ^75 
80 44 19,25 
39 42 39 
-0,39 
-0,51 
— 0,36 
59 33 l >75 
80 44 19,25 
39 42 39 
63773 >* 
98513.7 
,i 80 0 0 
Fairlight Dc 
iwn j 
1,28 
Jrightlir 
Jeachy I 
— 1,28 
ig 
dead 
art. vii. Comparison of the Distances from Botley Hill to St. 
Ann's Hill, and Fairlight Down, deduced from the recent 
Observations , and those of General Roy in 1787, 1788. 
The stations on St. Ann's Hill, Botley Hill, and Fairlight 
Down, connect our triangles with those of General Roy ; 
and therefore the two distances from the middle station, Bot- 
ley Hill, which are common to both sejies of triangles, afford 
