then he will obferve, whether he can fee them appear apon the 
S*/^,as upon a darker ground^efpeciallyjthc tbirdoi thcra,which 
is fenfibly greater,and more Luminous,than the reft. He hopeth 
a!fo, that in time, the Jhadow of Saturns Moon will be feen upon 
Saturn, althoagh we are yet fome years to ftay for it,and to pre- 
pare alfo for better Glaffes. 
From this rare Obfervation, he inferrs the Proportion of the 
Diameter of the Satellites to that of Jupiter 5 and judgeth, that rro 
longer doubt canbemadcof the turning of thefe4. Satellites^ 
or Moons zh out Jupiter, as our Moon turns about the Earthy and 
after the fanae way as the reft of the Celeftial Bodies of our 
Syfteme do moveiwhence alfo a ftrong conjecture may be made, 
that Saturns Moon turns likewife about Saturn. 
Hence he alfo taketh occafion to intimatejthat we need not 
fcruple to conclude, that if thefe two Planets have il4oons wheel- 
ing about them, as our E^rM hath one that moves about it, the 
conformity of thefeMoow/ with ouri^I/^^^^w^does prove the confor- 
mity of our Earth with thofe Planets^v^hxch carrying away their 
Moms with themfelves, do turn $boHt the Sun, and very proba- 
bly make their Moons turn about them in turning themfelves 
about their //x^} • and alfo, that there is no caufc to invent per- 
plexed and incredible Hypothefes^ for the receding from this 
Anahgie fince (faith he) if this be truths the Prohibitions of pub- 
lifhing this doClrine, which formerly were caufed by the offence 
of Novelty5will be laid afide-as one of the moft zealous Dodlors 
of the contrary Opinion hath given caufe to hope, witriefs£a- 
flaehius de Divinis, in his TraU againft Monfieur Hugens Syflems 
of Saturnyp.^g. where we are inform'dj thatthat learned Jefuit^ 
P.Fabry, Penitentiary of S Peter m Rome, fpeaks to this purpofe : 
^ It hath been more than once asked of your 
*Erveftri$, iifque Coryph^ls Chieftains , whether they had a Demonllratij 
non fennel quaefitam eftjUtrum / rr .1 i ^1 r .jii-r^j 
aliquam hlberest dcmonftra- afertzng the motton oj the Earth f They 
tionem pro Ttrra motu adftru- durjl never yet afirm they had 5 wherefore no* 
d^K'uin f"K htnders^ but that the Church may under. 
loca ilia in fenfu literal! Ecclci Jtand thofe Scripture-places ^ that {pea\ of 
fia imeiiigat, & inteiiigenda matter, in ^literal fence, and declare 
clTe declaretjquamdru nulla a«t/i,,f^ 1 n j i 1 
monftratione contrariura erin- they fbould be fo under \tood,as long as the con^ 
trary is not evinced by any demonfiration ^ 
whicb 
