s & ).

dura, 2 Linea scii, perpendiculari Nonagesimi atque puncto Zenith, Ortumversos ; Exivit vero circa 31 gradum a dicta Linea Perpendiculari Nona-gesimi occasom versos, ad Limbum Luna: obscuratum. Proinde linea Jovisitineraria fuit subtenso 104. ferö graduuum, attenta videlicet parte Lun.cBoreali.

Praeterea etiam maximi notatu dignum, quod ex hac observatione Diame-trum Jovis exquisite elicere potuerim; nimirum 51" 42/"; & tantae mag-nitudinis cxtitit etiam Diameter Jovis 50" circ. quoties illam per MaculasLuna dimensus sum. Quod autem Anno 1679. ^ie 5 J u,u cum similem JovisEclipsim observarem, longe ea extitit minor, nimirum tantum 30''

Id ex eo evenisse puto, quod observatio illa, tempore Diurno, SplendenteSole fuerit observata ; quo Radii Stellarum & Planetarum adventitii magis aLuce Solis absterguntur, quam Tempore Nocturno, nocte obscura. Qiicd-.si autem quaeras, quamnam Diametrum apparentem veriorem existimem?

Scias illam, quam Anno 1679. 5 Jun. de die, Sole splendente observavi. Nonequidem ex eo quod non aeque diligenter hanc quam illam determinaverim ;sed quod tempore Nocturno Radii Adventitii magis obstent, sicuti diximus,quam tempore Diurno.

6 . At 9* 1 3 i' (i 1 . Jupiter was in a Pcrpendicular falling on the Limb of^' Pjjjjjsj fcythe Moon over-against the Northern-part of the Spot Grimaldi , ( Maraotis ) p,'i 75 .near to BJccioli ( Stag. Miris ) and distant from the Limb about 4 times asmuch as the laid Spot.

9 l > 4o / 11". Jupiter touched the Circumfcrencc of iheAfoon, whichundu-lated by reascn of the Vapours near the Horizon.

9 h 41' io 11 . He quite disappeared in the Inequalities of the Mooj/s Limb,the Total Immersion might be forne Seconds lator. So the Central Immersionwas at 9 h 40' y 1 n . Jupiter entered over-against that Part of Grimaldi nextBJccioli.

ic h 10' x". The Outcrmost Satellite which preceeded Jupiter appearedover-against the Middle of the Caspian Spot (Pal. Maotis) through which theSeclion of Light and Darkjicss pasted, and made nearly an Equilateral Trian-gle, with the Extrcmities of that Spot.

ich 40' 2.4". The frst Limb of Jupiter began to come out of the Darkside of the Moon, over-gainst the North-part of the Caspian Spot, about Cleo'medes, ( ad Montes RJphaos. )

ic h 40 / 76". The Center of Jupiter did Emerge. It was difficult to dl-stinguisti the Moment when Jupiter % Disk was fully ciear, but at ic* 1 4L z6^.the Eclipse was certainly past. !,

At the Emesionoi the Center, the Altitudeof Jupiter was tl° 3L. - ;

At ic h 42' 49V. The Sxonid Satellite being the nearest of the three thatfollowed the Planet, Emerged.

At ic* 1 45' 1". The Innermoft Satellite , being near its greatest Elonga-tion , Emerged.

At ic h yc/ 42^. The T hird, or Pcnextimus Satelles, being likewise nearits greatest F.longation, began to appear over-against the Northern-Edge ofthe Caspian Spot.

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