I 
[ +57 ] 
1767 
June I I 9 51 40 
True 
h ' 
8 II 24 4 
1767 
II 47 54 
12 
58 
46 
13 
18 
0 
D 
14 
1 
7 
IS 
3 
57 
IS 
7 
27 
15 
25 
23 
‘5 
29 
53 
15 
29 
53 
16 
29 
43 
E. I. At Calais ; (ky ferene ; % well de- 
fined. The fatellite emerged at 
the diftance of | a diameter. 
Same refradtor. Good obfervation. 
[. 4. At Dunkirk ; ferene ficy i but If 
near the horizon ; the belts, how- 
ever, appeared plain, and I think 
it a good obfervation. The fa- 
tellite was more than 6 ' lofing its 
light. Dollond’s 3I feet re- 
fradlor. 
E. i.At Dunkirk; ferene (ky ; but 1/. 
very near the horizon, and ill de- 
fined. Doubtful obfervation. 
Obfervations on the fliadow of Jupiter's 
fatellites, and the variations of his belts, 
at the Obfervatory of the Marine, with 
a Gregorian refleaor, of 30 inches fo- 
cus, magnifying 104 times. 
The flitdow of the firfl fatellite appeared 
entirely on dilc, and proceeded 
along the upper part of the middle belt. 
'I'he fatellite iifelf entered half way on 
i;’s dife, following its fliadow on the 
fame belt. 
The fliadow cf the fourth entirely entered 
on if’s difk, arid running along the 
lower edge of If’s upper belt. 
The fliadow of the firfl fatellite in internal 
contadl with limb. ^ . 
The fliadow of the firfl quite oflF If s limb. 
The firfl beginning to go off the difc. 
The firfl gone off, but flill in external 
contadl with the limb. 
The fliadow of the fourth feems advanced 
one half of its path over the difc. 
The fliadow of the fourth feems to be two 
©fits own diameters from Tf 's limb. 
N n n 17^7 
VoL. LIX. 
