! 
Obfervations of Jupiter’s firft Satellite, 
made at Madeira. 
768 
ar.26 
sr. 2 
)r. 18 
25 
27 
ay 4 
11 
18 
20 
27 
ne 3 
1 / 5 
Magnif. 
power 
5 a' 
55 
55 
55 
55 
55 
Apparent time 
Immerfions. 
h ' // 
8 26 $1 
Emerfions. 
7 *9 24 
9 15 o doubtful 
7 33 27 
9 27 33 
7 52 10 flying clouds 
Id for diff. of telefcopes 
difF. of meridians 
[ S03 ] 
Obfer. made at 
Greenwich with 
a refledtor of fix 
feet focus pow- 
er ico 
11 29 23 
12 1 37 
1 3 57 *9 
12 16 46 
H 13 *7 
12 28 6 
Diff. of the two 
mer. by the obf. 
of 16 April, 
17.67 
1 6 25 
a 25 
i 6 50 
Calculated in 
Diff. 
of 
Mer. 
the 
nautical 
between Madei- 
almanac 
ra and Green- 
wich 
k 
r 
it 
b 
/ 
ir 
9 
34 
J 9 
I 
7 
28 
8 
26 
42 
1 
7 
18 
10 
22 
13 
t 
7 
*3 
8 
40 
42 
1 
7 
*5 
*0 
34 
57 
1 
7 
24 
8 
59 
24 
1 
7 
14 
z 6 55^ mean. 
N. B. 25" are to be allowed for the difference between the refledlor ufed at Greenwich and 
at ufed at Madeira. 
9' 16" are allowed for the difference of meridians between Paris and Greenwich. 
XLII. Ac 
