[ <54-$ 3 
XX! II. An Ohfervation on the ‘Planet Venus, 
(with regard to her having a Satellite) 
made by Mr. James Short, F. R. S. at Sun- 
rife, Odober 2]. *740, 
'p\Irecting a reflecting Tclefcope of 16.5 Inches 
U Focus, (with an Apparatus to follow the diurnal 
Motion) towards Venus, I perceived a fmall Star 
pretty nigh her 5 upon which 1 took another Tclefcope 
of the fame focal Diftance, which magnified about 50 
or 60 times, and which was fitted with a Micro- 
meter, in order to meafure its Diftance from Venus ; 
and found its Diftance to be about io°. 2' .0". Find- 
ing Venus very diftinCf, and confequently theAirvery 
clear, I put on a magnifying Power of 240 times, . 
and, to my great Surprize, found this Star put on the 
fame Phafis with Venus. I tried another magnifying 
Power of 140 times, and even then found the Star 
under the fame Phafis. Its Diameter feemed about 
a Third, or fomewhat lefs, of the Diameter of Venus 4 
its Light was not fo bright or vivid, but exceeding 
fharp and well defined. A Line, palling through the 
Centre of Venus and it, made an A ngle with the 
Equator of about 18 or 20 Degrees. 
I faw it for the Space of an Hour fevcral times 
that Morning 3 but the Light of the Sun increafirig, 
I loft it altogether about a Quarter of an Hour after 
Eight. I have looked for it every clear Morning 
fince, but never had the good Fortune to fee it 
again. 
CaJJini , 
4 
