Trigonometrical Survey. 
517 
SECTION V. 
Of the Direction of the Meridians at Dunnose and Be achy Head; 
and the Length of a Degree of a great Circle , perpendicular to 
the Meridian , in Latitude 50° 4,1'. 
art. 1. Of the Direction of the Meridian at Dunnose with 
On April 28th in the afternoon, the angle be- 
tween the pole star, when at its greatest apparent 
elongation from the meridian, and the staff, was o , „ 
Wherefore half their sum is the angle between 
the meridian and Brading staff, namely - 21 14 11,5 
On May 12th, in the afternoon, the angle be- 
Wherefore half their sum is the angle between 
the meridian and Brading staff, namely - 21 14 11,4 
Hence 21 0 14' 11", 5, may be taken for the angle between 
the meridian and Brading staff, as determined by the double 
azimuths. 
The apparent polar distances of the star, on those days 
which do not refer to corresponding observations on the oppo- 
site side of the meridian, are as follow : Azim. 
respect to Brading Staff. 
observed - - - 
And on April 29th in the morning 
24 4 23 
18 24 o 
tween the star and staff was observed 
And on May 13th, in the morning 
24 4 Q 9’5 
18 23 53,25 
which, with the lat. of 
Dunnose, viz. 50° 37' 8" 
nearly, give the azi- 
. muths for those days 
2 50 11,2 
2 50 11,5 
2 50 16,8 
o 
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