then he will obferve, whether he can fee them appear upon the 
Bellas upon a darker ground, efpecially, the thirdoi them,which 
Is fenfibly greater, and more Luminous, than the reft. He hopeth 
alfo, that in time, the Jhadorv of Saturns Moon will be feen upon 
Saturn , although we are yet fome years to ftay for it,and to pre- 
pare alio for better Glafies . 
From this rare Obfervation, he inferrs th q Proportion of the 
Diameter of the Satellites to that of Jupiter , and judgeth, that no 
longer doubt Can be made of the turning of thefe 4. Satellites , 
or Moons about Jupiter , as our Moon turns about the Earth , and 
after the fame way as the reft of the Celeftial Bodies of our 
Syftems do move:whence alfo a ftrong conjecture may be made, 
that Saturns Moon turns likewife about .Saturn. 
Hence he alfo taketh occafion to intimate,that we need not 
fcruple to conclude, that if thefe two Planets have Moons wheel- 
ing about them* as our Earth hath one that moves about it, the 
conformity of thefeA/oo7w with ourA/00?2 5 does prove the confor- 
mity of our Earth with thofe Planets,which carrying away their 
Moons with themfelves, do turn about the Sun, and very proba- 
bly make their Moons turn about them in turning themfelves 
about their Axis • and alfo, that there is no caufe to invent per- 
plex’d and incredible Hypothefes 9 for the receding from this 
Analogic fince (faith he) if this be truth, the Prohibitions of pub- 
lifhing this doCtrine, which formerly were caufed by the offence 
ofNovelty,will be laid afide^as one of the moft zealous DoCfors 
of the contrary Opinion hath given caufe to nope, witnefs Eu- 
ftaehius de Divinis , in his TraB againft Monfieur Hugens Syfteme 
of Saturn, p. 49. where we are inform’d, that that learned Jefuit, 
P. Fabry, Penitentiary of S Peter in Rome, fpeaks to this purpofe : 
* It hath been more than once ashed of your 
* Et vefbis, iifque Coryphacis Chieftains , whether they had a Vemonjiratiu 
“Prting the mourn of the Earth? They 
tionempro Terr<emotu adftru- durjl never yet affirm they bad 5 wBerefore no * 
endo. Nunquam aufi funt id ^ • p m ders, but that the Church may under / 
fland thofe Scripture-platet , that fpea( of 
sia iHreiligat., & intelligcnda tpyiaifer, in a literal fence , and declare 
% fhMld be fo under floods long a* the con- 
trary is not evinced by any clemonftratton ^ 
which 
