( m) 
they plcafcp and the weight of the Vial full of water takea ex- 
aftly at every timc,and reeorded^ marking withall the degree 
of Latitude^ and the day of the Month : And thsit as well of 
water near the Top 5 a§ at a greater Depth. 
Some Ohfer'vations concernrngju^it^r^ Of thepa'^ 
dow of one of his Satellites feen^ by a Telefcope 
f affing over the Body of ]^Y^ttr. 
I have received an Account from vtrj good hands^ That 
on the26t^'«of SeptemberhQ:, at half hoar after fcven of the 
Clock, wasfcent> both in H^//^i/?<rfand in France fby curious 
Obfervers, with very good Telefcopes) the fliadow of one 
of the Satellites of Jupiter^ piiBng over hi$ Body. One of 
thofcfmall Stars moving about his Body ( which are there- 
fore called his Satellites) coming between the Sun and it^ 
Blade a fmall Eclipfe, appearing in the Face of jf^/?/fer as a 
little round black Spot* The Particulars of tbofeObferya- 
tionsj when they fliall come to our Hands^ we may (if need 
be) make them publiks Which Obfervations, as they are 
in themfelv-es very remarkable^ and argue the Excellency of 
the Giaffes by which they were difcovered h So are we^ in 
partj beholding to Monfieur C<i^»i for them, who giving 
notice before- hand of fuch Appearances to be expeded^gave 
occafion to thofe Curious Obfervers to iook for them. 
Of a permanent Spot i;? Jupiter :by which k mani^ 
feftedthe converftonofjufitev about hk own Axis ^ 
Befides that Tranfient Shadow laft mentiooedj there hath 
been obferved, by Mr. H<?<?^firft (as is mentioned in Numb.i^ 
ot thefe tranf4&.^ and fince by M. Cajjim^ a permanent Spot 
in the Difque ot^upiters by the help whereof^thcy have been 
able to obftrve, not onely that Jupiter turns about upon bis 
own Axis? but alfo the Time of fuch converfiori i which he 
cdimates 
