faience ^ ^hich makes m believe,that they are fiat,aQd ftipet« 
licial CO fupiter^ 
Among theie Spots of the fecond fort there is none fo fen- 
ible,as one that is (cituate between the two Belts^which in the 
4if^ue off ?^/i^^r are ordinarily feen extended from eaft to weft^ 
the largeft of whichis between the Center and the Northern 
limKand the n^rro^eft is beyond the Center toward the Sou- 
thern Hmb.This Spot is alwaies adhering to tbe Seuthern Mt i 
its diameter is about the tenth part of that of Jupiter ^ and at 
tthe time that its center is neareft to that of Jupiter ^ '\t is diitant 
irom k about the third part of the ftmi-diameter of thatPlaoet. 
SignorC^ffini, after he had made many Obfervations of this 
:;Spot during theSummer of the year i66f ^^^^^^^^ ^hat the pe- 
riod of its apparent revolution i$ oi-mne,hours d.nd fifty fix mi-, 
mutes ^ and haviDg taken anEpmha oi the time^when k arrived 
at the middleof the Belt/ he calculated Tibbies and Ephemerids 
m{m motion for the end of the faid year i665,and for the be^ 
iginningofi666,He continued to objerve ituntii the beginning 
t)f i6665when 3#/?f^^r approached to the beams of the Sun jand 
the Obfei^ations were found conform enough to his Ephe- 
Tmerids. But after lt was got free of the fun^beams^this Spot was 
difficult to be difcerned : And as this gave ground to beheve, 
that it might be of the nature of the Spots of the Sun^ which ^af- 
ter having appeared for a while^difappear for ever,Signor/?«/- 
|?)2iceafed at length to obferve them. 
But Jan. 19. of this prefent year 1^72. fft. nj when he ob- 
'fetvcd Jupiter at lla clock in the morning,he perceived in the 
fame place of his dilque the Figure of the fame Spot, adhering 
£0 the fame Southern Belt. It was already gone beyond the 
moiety of this Beltsand he faw it advance little by little towards 
the Weftern lirab^to which it feemed to be very near at 6f a 
clock : But it then appeared fo imall and littlejand fo little fea- 
ilble^that he was obliged to ceafe from obferving it. 
By the Celerity of its motion ti the Center, and by the 
place where he had begun to feeic, he judged^that it might 
have been in the midft of the B^/^ at 4 a clock and 3; min^ in 
she morning : And as he prepared himfelf to make Ephemem 
lies of its motion for this prefent year i S/s^he perceived^ that 
ill thofe^ he had made for the year 1666, by good luckjthis 
Spot had 'been in ihcmidft of ^im the fajae day, namely 
