[ 579 3 
Such an obfervation I made 1 6th inflant, or rather 
17th, paft two in the morning; the particulars of 
which follow. [Vide Tab. XVIII.] 
The 16th, at noon, I fat a pendulum-clock, by 
which this obfervation was made, to folar time, by 
the Sun’s tranfit over the meridian, and determined 
with myfelf to ufe a Gregorian reflefting telefcope, 
magnifying 55 times, as the fame would be eafily 
manageable (and no rifque would be run of miffing 
the point of either immerfion or emerfron, but efpe- 
cially the latter, as it might not be fo eaffiy found on 
the Moon’s dark limb by a telefcope of a fmaller field 
of view). I waited to make this obfervation, but. 
could not fee the Moon till I4 h 22', when fhe 
emerged from dark flill clouds into a moft clear and 
ferene fky, nothing could be finer for obfervation; 
and thus fhe continued, during the obfervation, and 
Jong after it. 
The focus of the telefcope flood as it had flood for. 
feveral days, and as I had feen Venus near the ho- 
rizon with it two evenings before, and Jupiter with 
his fatellites not high above the horizon the preceding 
morning; and now I had compared it with the fixed, 
flars, and the Moon, after emergency from the. afore- 
mentioned clouds. So the telefcope was rightly ad- 
j idled. 
At i4 h 21' 3", I faw a faint point of light, where 
the emerfion afterwards appeared ; but this faint point 
of light appearing and disappearing by alternate fits, I 
could not know if it was part of Saturn or of one 
of his fatellites, till it was i4 h 21' 1.3", when this 
point of light was grown a little brighter and larger, 
and therefore I judged it was the tip of the ring jufl 
emerging. Yet it appeared fo dull and hazy, that Ii 
