488 An Account of the Measurement 
And, by simply dividing the terrestrial arcs by their corre- 
sponding celestial ones, and afterwards multiplying the several 
quotients by 3600", we shall get the lengths of the degrees as 
follows. 
Fathoms. 
Middle point between Dunnose and Clifton - 60820 
Dunnose and Arbury Hill - 60864 
Arbury Hill and Clifton - 60766 
Dunnose and Greenwich - 60884 
Greenwich and Clifton - 60794 
Arbury^ Hill and Greenwich 60849 
Blenheim and Clifton - 60769 
Blenheim and Dunnose - 60830 
Taking the latitude of Greenwich at 51 0 28' 40", from the 
several arcs now given, the latitudes of their middle points are 
easily found ; and, with the lengths of the degrees, when pro- 
perly arranged, will stand as follows. 
Latitude of middle 
Arbury Hill and Clifton 
52 ° 
point. 
30' 29", 8 
Fathoms. 
60766 
Blenheim and Clifton - 
32 38 36,1 
60769 
Greenwich and Clifton 
3 2 
28 5,7 
60794 
Dunnose and Clifton 
32 
2 19,8 
60820 
Arbury Hill and Greenwich 
3 i 
3 i 4 A 
60849 
Dunnose and Arbury Hill 
3 i 
33 18,2 
60864 
Blenheim and Dunnose 
3 * 
13 18,2 
60890 
Dunnose and Greenwich 
31 
2 54,2 
60884 
Note. The altitude of Arbury Hill, above the level of the sea, is 804 feet. The 
altitudes of the atations southward of Aroury Hill, are given in the former accounts of 
the tngr 1 om trical operations : those to the northward of Arbury Hill may be found 
from t e following data. 
At Sul ton, Heathersedge, elev. 15' Z5"; Gringley, dep. 18' 47". — At Castle Ring, 
Orpit " eights, dep. 5' z6"; Bardo ' Hvl, dep ft 48"; Corley, dep. 14' 26''. — At 
Heather sedge, Oip : t Heights, dep. zo' 27" — At Clifton, Heathersedge, eiev. 29' iz'; 
Gringley, dep 15 40'' — At Hollan Hill, Bardon Hill, elev 2' 35"; Orpit Heights, 
elev 12' o'; Sutton, dev. 7' 12". — At Bardon Hill, Corley, dep. 16' 3"; Arbury Hill, 
dep. 16' o"; Castle Ring, dep. jz' 30"; Sutton, dep. 19' 48"} Orpit Heights, dep. 6' 35". 
