(3h)

LXX 1 X. Dec. xg. 1 6jx. We found u small Star Weitward ot Sararw/be-TlwT&iV.fSa-tween him and his Ordinär? Satellite, whicb was on the Well: allo,: almoll tdlitc of Sa-at a double Distancc. Dec. 50. We law a little Star, on the Eait of himund his ördinary Satellite, which had palled also to the Eait of him. «. 92. p. 5181.

Jan. ro. 1673. This little Star appear'd to have returned almolt to thesimc Position in respect os Saturn and bis Ordiv.ary Satellite, where it hadbeen Dec. xz; Jan. 1 s. the ördinary Satellite was Oriental, aud the iNVn>one Occidental, as it had been in the prccedcnt, but a little nearcr to Saturn.

We had that Evening time enough attentively to Observe this Plattet fora wliole Hour together, during which we pereeived, it approached to Saturnon the Welt, and conscquently was in the Superiour part ot his Circle :which did fully consirm 11s in the Suppofition we were inclined to, that itwas an Interior Satellite.

Comparing the Oblcrvations together, we began to bild the Rule of theMotion of the new Interior Satellite. For the two lalt {hew’d.us, th;nin 5 Days he had made more than a wliole Revolution. The hrlt Qblerva-tion comparcd with the jd made us judge, that in 18 Days he had made aNumbcr of Revolutions almolt whole ones, which certainly were 4; cachof them was of 45- Days: So that between the ic th and 15 th it mjght .be,that there had been one Revolution of 4! Days, or two Revolutions ofDays eacli. But the Combination ot the hrst with the id, made us secludedie Period of 2.4 Days. We therefore Judged by thele Oblcrvations; thatthis last Planet finishes his Revolution about Saturn in 4t Days ; that theScmidiameter of this Circle is 1J of the Diameter of Saturn s Ring ; andthat he was towards his greatclt Occidental Digrellion the z%d of December ,and Jan. 1. about 7 a Clock in the Evcnning. We have fincc found, .thathis greatclt: Digrellion from the Center of Saturn is only I f of his Ring, 1 p,and the Period of his Revolution is 4 Days 1 ih and 2.7'. His Latitude Aug-ments also aecording as the Ring enlargeth, and at the present that the large-:ness of the - Rjng is greater than the Diameter of the Globc of Saturn, he isto pass in the Conjunctions without touching cithcr Saturn or his Ring. YetHOtwithlfanding we have not yet been able to dillinguilh him in the Con-junctions either in the upper or lower part of his Circle ; but only in hisGreatclt:, as well Oriental, as Occidental Digreltlons.

LXXX. Thele two Satellites were hrlt of all seen in Mar.An. 1684 . Imlrrwrby two excellent Object Glattes of ico and 136 Feet, end afterwards by tellites 0/Sa-two others of 90 and 70 Feet, all made by S. Campani, aster the Dilcovery .caffini^of the jd and ykk Satellites, which had been made by others of his Glasses». 181.x. 79.of 47 and Z4 Feet. We have since seen all thele Satellites with that of 34Feet, and continued to oblerve them with Glafles of M. Borelli of 40 and70 Feet, and by those which M. Artoutfuel hath lately made, of 80, 155,and no, Feet. It was eafie for us to fec thefe two Satellites by thele dif-ferent Sorts of Glasscs, alter having found the Rules of dwir Motiuny where-by we might with more particulur attention look upon the. pffccs wherethey ought to be.

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