[ iSl 3 
Mr. Sproule, in reducing the time of his clock , having negleded the 
equation of equal altitudes, it <was necejfary to re-compute the corredions ; . 
and here follow the immcrfions and errerfions of Jupiter's fatellites, reduced 
to apparent time, from the original obfervations, due allowance being made, 
for the equation of equal altitudes, by the Af ronomer Royal. 
1768 
h 
/ 
// 
Jan. 29. Im. 1. 
*3 
57 
47 
Mar. 15. Im. i._ 
i '4 
21 
14 
16. Im. 2. 
I T 
59 
7 
Im. 3. 
3 ° 
10 
t 
April 9. Em. T. 
n 
18 
26 
10. Em. 2. 
1 1 
38 
s i 
25. Em. 1. 
9 
39 
40J 
l 
May 9. Em. 1. 
13 
3 ° 
54 
L2. Em. 2. 
11 
J 5 
43 
Apparent Time.. 
N. B. In thefe two emer- 
sions, the fatellites 
feemed to emerge 
flowly out of the fha- 
dow. 
This is the bell ob- 
servation, the Satellite 
ftarting out inftan- 
taneoufly. 
XXIII. JJlro- 
