( ^026 ) 
ExtraB of a Letter^written at Paris Novemlf.j. 1671. (ft.n*^ 
by Monjieur Chriflian Hugens de Zulichem to the P ublifher ; 
concerning the obprvations of S^ituvn mentioned in the next fore- 
goinj^ Difcourfe ; EngHjh't out of French, 
s IK, 
THere is fomething indeed, that hath kept me, week by 
week, from writing to you ; which is the Printed pa« 
per, accompanying this Letcer* For the Obfervations of 
Saturn,^ therein containcdj I had dehVer'd two Months ago; 
butSignor purpofing to publifli at the fame time the 
fequel of his^ Obfervations^^of the Solar Spot fy the Engraving, 
and other ckcumftance^liave cauled fuch a retardment, that 
all this appears not till i^ow, and that to my great regret, bc- 
caufe having predidied the Return of the Round Figure of 
Saturn towards the End of this year, there wants but little but 
that the PrediiStion is accomplifli't before others have been 
advertifed thereof. I fay this as to Forraign Countries, for our 
Phiiofophers here know very well^that as foon asSignorC^^wz 
had told me^that the Jrms of Saturn were returned^I faid^that 
affuredly they would dif-appear before the End of this Year. 
I ftiU obferved them yefterday in the evening, but they were 
fo faint and obfcure^ that it washard to difcern them^ fo that 
within a few days they will appear no more at all. This con- 
firms altogether my Hypothefs of the 7{ing, which now dif- 
appears in proportion that the rays of the Sun do obliquely 
illuminate the J?^nurface of it, obverted to ourlight* And 
the Appearances of this year give occafion to predidl the Re- 
turn of the J{ound figure with much more exac^nefs , than 
i^efore. ^ 
An ExtraS 
