C 5? ] 
XI An Obfervation of three Mock-Suns feen 
in London, Friday, Sept. 17, 1736. by 
Martin Folkes, Effo V- Tr. R. S, 
Tab. II. Fig. 5. 
A S I was reading this Morning a little after feven 
o’Clock, in a Room looking towards the 
North-Eaft, I accidentally took Notice of an odd 
Stream of colour’d Light, fhooting upwards from the 
Sun, as I then thought, fhining through a thin waterifti 
Cloud s but recollefting the Appearance was feveral 
Degrees more northerly than the Sun’s true Place at 
that Time, I immediately went to the Window, and 
found what I had taken for the Sun was a Parhelion 
fhooting out a fhort horizontal Stream or Tail towards 
the North ; the Sun itfelf fhining pretty bright and 
clear at the fame Time. I alfo obferved, the Stream I 
had at firft feen, was part of an Arch concentric to 
the Sun, and paffing through the P ar he lion : This 
Arch was for a good Way tolerably defin’d, and ting’d 
with Red on the Infide, and a blueifh White on the 
other. I then caft my Eye to the other Side the Sun, 
where I perceiv’d a fecond Parhelion , at the fame 
Diftance from him, towards the South, tho’ not yet 
fo bright as the firft. I then went up to my Leads, 
my Profped being too confined below : Where foon 
after I was come, I found the Phenomenon confidera- 
bly to improve, the Arch round the Sun forming 
itfelf into more than a Semicircle, reaching almoftto 
the Horizon Northward, and with very little Difcon- 
H 2 tinuance 
