070 
•which we fee I'n fwimming, ^e.) And I have never found it lower 
than in high Winds. * 
Ihave divers times, upon difcerning "^Tk Antkr cfthefe obftr- 
my Quxkfilver to fail without any vifible ~,„.f , '''[f"'' 
^ 1 1111 J J r 1 ^^^^^ particuUrlf to ehferve^ 
caule ac home,Iooked abroad;and tound ^^^^ ^^at pomts thefl 
("by the appearance of broken CIouds,or winds blow , that make tk 
othervvife) that it had rained not far off, ^mekjiher thm fuhftde, 
though not with us : Whereapon,the Air 
being then lightened^ our heavier Air (where it rained not) may 
have^in part^difcharged it felf on that lighter. 
^ rnQve particuhr Acc&unt of thofe Ohfervatio?is about Jupiter ^ that 
were mentioned in Numh. 8, 
' Since thepublifiiingof A'^i!//;^^. 8. thticTranfa^ions, wherCg 
among other particulars^ fomefliort Obfervations were fet down 
touching both the simdorv of one oi Jupiter $ Satellks^ paffiogover 
his Body^and that Permanent Spot, which manifefts the Converlion 
of that Planet about his own Axis i there is come to hand an Ex* 
traB of that Letter^which was written from Rome, about thofe Dif- 
coverieSjContaining an ample and particular Relation of them, as 
they were made by the Learned Caffini, Profeffor of Ajlronomym 
the Univerfity of Bononia.Th^iX. ExtraS^as it is found in the French 
'journal des Scavans oi Febr, 22. 1666. we thus Engliflj, 
Monfieur T^^/^^after hehad difcovered(by the means of thofe 
Excellent Glallesof $o.palmes, ot^f.feet, made by M. Campani) 
thQ shadows ^ caft by the 4 Moons or S^telhts of Jupiter uponhis 
Diske, when they happen to be between the Sun and Him; after 
he had alfo diftinguilhed their Bodies &pon the Diske of Jtipiter ^ 
made the laft yearfome Prsedidiions for the Months of Augufi 
and September^ noting the dayes and hours, when the Bodies of 
the Hiid Satellits and their Shadows Ihould appear upon Jtipiter , to 
the end that the Curious might be convinced of this matter by 
their own Obfervations. 
Some of thefe Prasdidtions have been verified not only at Rome^ 
and in other places of Italy ^ but alfo at Paris by M, Aw^out , the 
raofl: Celebrated andthemoft Exadlof our Aftronemers and in 
HoUand^by M. Hu^ens. And we can now doubt no Ionger,of the 
rotation of the Satellits ^hom Jupiter, the Moon turns about the 
Eartli ; nor believe^ that Jupiter or his Attendants have any o^her 
L^ghfyJian tliat.which they receive from the Sun • as fome did af- 
A a fare 
