[ 75 ] 
1772. 
O 3 ept. 
% oa. 
0 
J 
$ 
App. time. 
h i " 
7 37 3 ° 
Firlt fat. in contadt. 
7+20 
1 occult. 
.8 9 26 
Conjunction of third and fourth fat. 
8 14 45 
Second fat. in contadt. 
8 20 0 :: 
occult. 
9 2 7 4 ° 
Firlt fat. in contact. 
9 3 2 3 ° 
occult. 
• 8 2 9 45 
Firft (at. in contadt, juft gone off the limb. The 
(hadow at that time about f. 
• 7 4 ° 15 
Firft fat. in contadt. 
7 44 20 
occult. 
Thefe laft obfervations are not to be depended 
upon, within feveral feconds j and yet, if purfued 
regularly, might have their ufe. I was led into 
making them from what M. Meffier tranfmitted to 
this Society, in a former paper, Vol. JLIX. N° lxiv. 
Indeed the hint he there gave, concerning the Su- 
periority of achromatic teiefcopes above all others 
for thefe purpofes, induced me to procure one from 
Mr. Dollond, of his la ft conftrudbion, with a triple 
objedl-glafs ; which, I believe, is excellent in us 
kind: at leaft, it has fully anlwered the higheft ex- 
pectation I had formed of them. 
The drawings fhew how Jupiter appeared to me 
at different times. The broad belt acrois the middle, 
I cannot tell what to make of; fometimes it appears 
as a combination of feveral fmaller ones; but uiuallv 
j 
clouded, or waved, in the middle, with its edges 
in general darked ; perhaps from their oppofition to 
the contiguous parts, which are always much brighter 
than the reft of the planet. There have been two 
places in that belt particularly dark (efpecially that 
L 2 marked 
