452 An Account of the Measurement 
the Hill, was observed on different arches of the large theodolite ; 
the results being as follows, viz. 78° 13' 32"} 
|| VMean 78’ 13' 33". 
32 ) 
In a former article it has been shown, that Gringley is 
7 6° 17' 25" south-east of the meridian of Clifton; therefore, 
78° 13' 33" — 76° 17' 25"= i° 56' 8", is the bearing of Laugh- 
ton Spire from that meridian. The instrument, being otherwise 
adjusted for observation, was then brought into the plane of it, 
by setting off i° 56' 8" on the azimuth circle ; the permanency 
of the line of collimation of the lateral telescope having been 
previously ascertained. 
Observations made at Clifton , to determine the Zenith Distance of 
/3 Draconis. 
Point on the Limb , i° o' South. 
Day of 
Face of 
Plumb- 
Observa- 
Zenith distance 
Zenith distance 
Barome- 
Thermometer. 
the 
the arch, 
fine. 
tion of 
in revolutions 
reduced. 
ter. 
month. 
E.orW 
the star. 
and parts. 
Above. 
Below. 
rev. div. 
rev. div. 
° ' rev. div. 
0 > u 
Inches. 
O 
O 
July 20 
W 
12 1,04 
12 14,8 
1 00 13,76 
1 O 13,78 
28,8 
58,0 
56,0 
22 
W 
7 53*33 
13 12,0 
17.67 
15,52 
28,7 
54,0 
54 >S 
26 
E 
«3 27.55 
13 6,8 
20,75 
20,78 
28,8 
64,2 
6 4,3 
28 
W 
9 21.94 
9 32»3 
10,36 
10,38 
28,8 
59,5 
58,5 
29 
E 
9 3.13 
8 44,1 
18,03 
18,06 
28,8 
56.5 
57,5 
3 » 
W 
9 34.59 
9 44.1 
9,51 
9,52 
29,0 
57,2 
56,5 
Aug. I 
E 
8 36,00 
8 18,5 
17,5° 
17,53 
29,2 
59,5 
57,2 
3 
W 
8 57. 8 7 
9 8,9 
10,03 
10,05 
29,16 
68,0 
64,5 
5 
E 
8 11,26 
7 53.8 
16,46 
16,48 
29,0 
71,5 
73 ,* 
7 
W 
8 5**74 
9 1,6 
8,86 
8,87 
28,9 
67,2 
66, 1 
8 
E 
8 14,84 
7 57.9 
15,94 
15,96 
28,9 
65,1 
65,1 
12 
E 
n 7.98 
10 50,6 
16,38 
16,41 
29,15 
58,1 
58,0 
*3 
W 
8 22,00 
8 30,4 
8,40 
8,41 
29,3 
61,2 
61,1 
*7 
E 
8 30,33 
8 15,8 
J 4’53 
* 4,55 
29.I 
70,5 
71,0 
18 
W 
8 46/62 
8 54.7 
8,08 
8,09 
28,8 
70,1 
7° >3 
