1 20 Mifcellanea Curiofa. 



tried by the Emerfion of the firft Satellh obferv'd 

 at Paris, the gtb of November laft, at £ a-clock 

 35 r 45 rr at Night, 10 Minutes later than it was 

 to be expected, by deducting it from thofe that 

 had been obferv'd in the Month of Augufl y when 

 the Edrth was much nearer to Jupiter ; which 

 M. Homer had predicted to the faid Academy from 

 the beginning of September, 



But to remove all doubt, that this Inequality 

 is caufed by the Retardment of the Light, he de- 

 monftrates, that it cannot come from any Ex* 

 centricity, or other Caufe of thofe that are com- 

 monly alledged to explicate the Irregularities of 

 the Mcon 9 and the other Planets ; though he be 

 well aware, that the firft Satellit of Jupiter was 

 Excentrick ; and that, befides his Revolutions 

 were advanced or retarded, according as Jupiter 

 did approach to or recede from the Sun ; as al- 

 fo, that the Revolutions of the Primum Mobile 

 were unequal : Yet, faith he, thefe three laft 

 Caufes of Inequality do not hinder the firft from 

 being manifeft. 



An 



