45§ 
An Account of the Measurement 
Observed Zenith Distances of Capella. 
Point on the Limb , 7 0 40' South. 
Day of 
Face of 
Plumb- 
Observa- 
Zenith distance 
Zenith distance 
Barome- 
Thermometer. 
the 
the arch, 
line. 
tion of 
in revolutions 
reduced. 
ter. 
month. 
E.01W. 
the star. 
and parts. 
Above. 
Below. 
rev. div. 
rev. div. 
0 ' rev. div. 
0 ' u 
Inches. 
O 
O 
Aug. 7 
W 
9 7 > 2 o 
9 3 6 >° 
7 40 0 28,80 
7 40 22,85 
28,7 
66,0 
66,0 
8 
E 
9 5>*3 
8 25,7 
3 8 >53 
38,59 
28,9 
7 M 
71,0 
9 
E 
6 28,62 
5 4 8 >° 
39,62 
39 68 
28,9 
81,5 
74 ’S 
18 
W 
9 MS 
9 26,9 
2 5>45 
25,49 
29,0 
74,0 
68,0 
>9 
E 
8 3,80 
7 28,0 
34,80 
34 > 86 
28,8 
68,7 
67>5 
Operations at the new Station on Arbury Hill, near Dav entry, 
with the Zenith Sector, in the Months of September and 
October , 1802. 
In the Phil. Trans, for 1800, page 65 8, it will be seen, that 
the bearing of the Summer House on Bardon Hill, in the north 
of Leicestershire, from the meridian of Arbury Hill, is 7 0 37' 31/ 
NW ; and, as this spot is only 277 6 feet westward from the 
meridian of Dunnose itself, it follows, that 7 0 37' 31" may be 
taken for the bearing of the above object from Arbury Hill. To 
avoid, however, the possibility of any error arising from adopting 
this supposition, the direction of the meridian was ascertained, 
(before the zenith sector was got up,) by a double azimuth of 
the pole star. From this it appeared, that the angular point of 
the roof of a house about seven miles distant, was within a few 
seconds of the true northern direction ; and also, that Bardon 
Hill (the summer house) was 7 0 37' 35" north-west. By ob- 
serving these two objects, as the weather suited, the sector was 
afterwards got into the plane of the meridian. 
