[ 18 9 j 
June 6th, a cloudy morning, till about fix o’clock, 
when the clouds began to diffipate, but not enough 
to afford a plain fight of Venus on the fun, till more 
than half paffc feven, and the planet got nearer the 
limb of the fun, than I had defined to fee it firfl on 
the difk. 
By repeated trials, the time in which the planet 
was paffing from the internal to the external eontadf, 
with the wire of the micrometer was 3-i feconds of 
time, and the angle I C L of the angular micrometer 
was 8°. 
With the fix feet Newtonian refledlor, and it# 
magnifying power of no, and alfo of 220 times, I 
carefully examined * the fun’s difk, to difcover a fa- 
tellite of Venus, but faw none ; for I had a very clear 
dark glafs next my eye, and the fun’s limb appeared 
moll perfectly defined ; but a very narrow waterifh 
penumbra •J* appeared round Venus, by which its 
limb was not perfectly defined, and at the diftance of 
about a fixth part of Venus’s diameter from its edge, 
was the darkeft part of Venus’s phafis, from which to 
the centre, an imperfedt J light increafed, and illumi- 
nated about the centre. 
At 8 h i6 / per clock, I was prepared to obferve the 
internal contadt; and as Venus drew nearer to the 
limb of the fun, the penumbra near the limb of Venus 
* After the tranfit, till two o’clock afternoon the fame day, 
I continued obferving the difk with this telcfcope, but faw no 
fatellite pafs over the fun. 
f This penumbra could not by any means be made to difap- 
pear, although I tried to make it vanifh, by altering the focus 
cf the telefcope a great number of times. 
J This could not arife from any imperfection of the telefcope, 
as the folar maculae appeared fharply defined, as through a re- 
fractor. 
became 
