Gen . Roy’s Account of 
Art. II. Calculation of the Triangles . 
172 
N° of 
triangles. 
Names of the Rations. 
Obferved 
angles. 
Spheri- 
cal 
excefs. 
DifF. or 
error. 
Angles cor- 
re£ted for 
calculation. 
Pittances. 
( 
Hanger-hill Tower 
(Hampton Poor-houfe 
'King’s Arbour 
0 / // 
42 2 32 
67 55 39 
70 I 48 
'// 
// 
Of// 
42 2 34 
6 7 55 39 
7 ° 1 47 
Feet. 
I. ) 
x 79 59 59 
O.29 
— 1.29 
1 
The Base between Hampton Poor-houfe anc 
Arbour 
Hanger-hill Tower from { 
1 King’s 
ar-houfe 
ir 
» 9 • « 
• • • • 
• • • • 
27404.7 
38461. 12 
37922.57 
| 
St. Ann’s Hill 
Hampton Poor-houfe 
King’s Arbour 
44 >8 51-5 
61 26 33.1 
74 *4 35 
44 18 51.5 
61 26 33.5 
74 14 35 
' . 
1 79 59 59 - 6 
0.21 
— 0.61 
1 
„ * , TT . 1t r f Hampton Poor-houfe 
St. Ann s Hill from { King t s Arbour . 
• • • • 
« • • • 
37754-25 
34455-8 
Hence, in the quadrilateral formed by Hampton Poor-houfe , 
Kings Arbour , Hanger-hill Tower , and *SV. Ann's A?///, making 
nfe of the two obtufe angles, as contained within their refpec- 
tive known fides, we have for the mean diftance of the points 
of the acute angles at Hanger hill Tower and St. Ann’s Hill, 
expreffed by a dotted line in the plan of the triangles, 68897.165 
feet. 
Wardrobe Tower ol 
Windfor Caftle 
1 • • • 
9 ® 
• Q 
58 9 58-5 
King’s Arbour 
62 40 27.5 
62 40 275 
St. Ann’s Hill 
59 9 H 
' 
59 9 *4 
0.25 
Windfor Caftle from { Si 
34819.4 
3603^-37 
N° 
