424 
An Account of the Measurement 
At Castle Ring. 
Between 
Bar don Hill and Orpit - 
Corley and Bardon Hill 
At Corley . 
Castle Ring and Bardon Hill 
Arbury Hill and Bardon Hill 
At Arbury Hill . 
Corley and Bardon Hill 
O / // Mean. 
55 3 2 43 1 
43» 2 5 
43.75 
44. 2 5 
44.75 
45 J 
47 54 4o,5 ] 
41.75 j 
42.5 >42,25 
43.25 I 
43.5 J 
72 32 45,751 
46,25 { 
46,75 j 
47 J 
> 4 6,5 
107 20 13,5 'j 
14,25 \ 14,25 
15,75 J 
84 14 32,5 ] 
33,25 \ 33>5* 
34,25J 
Reduction of the Base to the Temperature of 62 °. 
The apparent length of the base was 259 chains 
of 100 feet each, -f- 8 chains of 50 feet each, and the 
overplus of the last chain viz. 38,32 1 feet 
The chain B, before the measurement, was found 
Feet. 
26338,321 
to be divisions on the micrometer-head shorter 
* For the observations of the angles of the triangles southward of Arbury Hill, 
see the Philosophical Transactions for 1795 and 1800. |$ 
