C 371 ] 
Obfer 'nations of the difference of right afcenjion , by 
time , between the moon s enlightened limb and Jlars , 
taken by the help of the parallaSlic wires adapted to 
the refledling telefcope ; defigned for determining the 
horary parallaxes of the moon. They may alfo 
Jerve to deduce the longitude of the place. 
V- Sept. 3. Compared the moon’s weflern and preceding limb, 
with u Librae in right afcenfion, at the Obfervatory on the 
Alarum Hill. The times are by the clock, which is 12 fe- 
conds too flow for l'ldereal time, and keep the rate of going 
of fidereal time, exactly. The flar puffed fouth of the moon’s 
centre. 
jlft hor. w. 
2d her. w. 
3d hor. w. 
D ’s I.imb at middle wire. 
Apparent Time. 
H / // 
H 
/ n 
/ // 
/ // 
a Librae 
17 
42. 9 
42 23 
4 2 37 
D ’s VV . Limb 
*7 
43 45 
43 59 ^ 
44 13 1 
6 52 49 
« Librae 
18 
2 10 
2 24 
2 38 
5 ’s W. Limb 
18 
4 h 
4 287 
4 42 - 1 - 
7 2 3 
a . Librae 
18 
16 3 
16 17 
16 31 
D ’s W. Limb 
18 
1 8 274 
18 42 
18 56 
7 27 26 
a . Librae 
1823 6 
23 20 
2 3 34 
5 ’s W. Limb 
i8|2 5 41- 
2 5 55 
26 9 + 
7 34 3 8 
Thurfday September, 24 . 1 removed the clock down to James’s 
Valley, and keeping the fame length of the pendulum as before, 
fixed it up ftrongly againfl the wall of a houfe, in an upper 
room, whence I could make my obfervations through openings 
made in the roof of the houfe. I fixed the equal altitude inflru- 
ment, for regulating the clock, againfl a flrong pofl, let deep 
into the ground, in a little room eight foot fquare, built for this 
purpofe, in a convenient open place, at a little diflance from 
B b b 2 the 
