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IV. ObferVations on the Satellites of Jupiter and 
Saturn, made with the fame Telejcope. (By John 
Hadley, Eff^ F. 5 ^. S. ExtraEied from the 
Minutes of the Royal Society, Apr. 6 * 1711. 
M r. Hadley gave the Society a Relation of fome of 
the moft remarkable Obfervations, which he 
had made with his Refiedling Telefcope, before he 
prefented it to the Society, 
In obferving Jupiter^s Satellites he has feen diflind- 
ly the Shadows of the firft and third Satellites caft 
upon the Body of the Planet , Mr. Folkes and Dr. Ju- 
rin, being prefent, affirmed, that Mr. Hadley had like- 
wife fhewn them the Shadow of the third Satellite 
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through the fame Telefcope. 
In obferving Saturn the laft Spring, at a Time when 
that Planet was about 1 5 Days pad the Oppofition, he 
faw the Shade of the Planet cafi: upon the Ring, and 
plainly difcerned the Ring to be diftinguiffied into 
two Parts, by a dark Line, concentric to the Circum- 
ference of the Ring. The outer or upper Part of the 
Ring feemed to be narrower than the lower or inner 
Part, next the Body, and the dark Line, which fepa- 
rated them, was -ftronger next the Body, and fainter on 
the outer Part towards the upper Edge of the Ring. 
Within the Ring he difcerned two Belts, one of which 
crofs’d Saturn clofe to its inner Edge, and feemed like 
the Shade of the Ring upon the Body of Saturn ^ but 
when he conhdered the Situation of the Sun, in refped 
to 
