504 Capt. Kater's experiments for determining the variation 
At Dunnose Station. 
Objects. 
Readings of the 
Verniers. 
Mean. 
North end of Base, 
0 / // 
0.17. O J 
16.40 j> 
16.5° J 
0 / // 
0.16.50 
Top of the Signal Post, 
36.26.ZO 1 
26.20 > 
26.15 j 
36.26.18 
Sir Richard Worsley’s Obelisk, 
159.26.20 1 
26.30 l 
26. O / 
159.26.17 
No. 1. From the North to South end of Base , ii/\pfeet. 
o III 
North end Base, - 105.28.32 1 to Summer house I" 3755 
South end Base, - 59.22.40/ chimney, 1 4205 
Summerhouse, - (15. 8.48) 
No. 2. From the North to South end of Base, 1140 feet. 
o / // 
North end Base, 104. 4.42'! . [165 
South end Base, 7*44-37 i to ^& na P° st 
Signal Post, - (68.10.41 ) 
No. 3. In the following triangle, we have given the two 
sides from the south end of the Base to the Summer house, 
and from the south end of the Base to the Signal Post and the 
included angle, to find the remaining angles and the dis- 
tance from the Signal Post to the Summer house. 
0 / 1 / 
South end Base, 67. 7.17 
Summer house, 16.20.38 
Signal Post, - 96.32. 5 
, f HQl 
to Signal Post 1 
6 l 39°° 
