in the length of the pendulum vibrating seconds. 501 
Observations for connecting the Stations of the Trigonometrical 
Survey with those of the Pendulum. 
Clifton. 
Oct. 9th 1818. The angles of the following triangles were 
observed, in order to obtain the distance from Clifton Bea- 
con to the Pendulum. 
Clifton Beacon from Laughton Spire , 2540 9 feet. 
Clifton Beacon, 
Laughton Spire 
Station A, 
Olll 
83.22.23 
( 2. 6. o) 
94 - 3 1 '37 
to Station A 
{ 
934, fe et. 
Clifton Beacon from Station A, 93 4 feet. 
) 
to Pendulum Stat 
Clifton Beacon, 85.48.29 
Station A, - 58.48.41 
Pendulum Station, (35.22.50) 
The angle between Laughton Spire and 
the Pendulum Station is, 
Laughton Spire is south west of the Me- 
ridian of Clifton Beacon, 
Hence, the bearing of the Pendulum Sta- ] 
tion from Clifton Beacon to the N.E. is / 
l 
1 1380 feet. 
1b9.10.52 
1.56.12 
12.45.20 
Arbury Hill. 
On the 26th of October, a base of 906 feet was measured 
in the meadows at the foot of Arbury Hill, for the purpose 
of finding the distance from Arbury Hill to the Pendulum 
