( 21J ) 
faw indeed whit we bad none of us feen before ; I mean 
two plain Parhelia , or Mock- Suns, tolerably bright and 
diftind j and that in the ufual Places, viz. in the t wo Inter- 
ferons of a ftrong and large Portion of an Halo, (Fig. i.) 
with an imaginaryCircle, parallel to the Horizon, palling 
through the true Sun. I call this Circle here imagina- 
ry, becaufe it was not itfelf vifible, as it fometimes has 
been at fuch Appearances. Each Parhelion had its Tail, 
of a white Colour, and in direct Oppolition to the true 
Sun ^ that towards the Ea ft was 20 or 25 Degrees long ^ 
that towards the Weft about 10 or 12 Degrees j but 
both narroweft at the remote Ends. The Mock-Suns 
were evidently red towards the Sun, but pale or whi- 
tilh at the oppofite Sides, as was the Halo alfo. Upon 
calling our Eyes upward, we faw an Arc of a curious 
inverted Rainbow , about the Middle of the Diftance 
between the Top of the Halo and our Vertex. I mean 
this, when Allowance is made for the ufual Inequality, 
that appears between the fame Number of Degrees’ 
nearer to and remoter from that Vertex. This Arc was as 
diftind: in its Colours as the common Rainbow • and, 
with the like Allowance as before, of the fame Breadth! 
The red Colour was on the Convex, and the blue on 
the Concave of the Arc^ which feemed to be about 90 
Degrees long : Its Center in or near our Vertex. On 
the Top of the Halo was a kind of inverted bright 
Arc, though its Bend was not plain. The lower Part 
of the Halo was among the Vapours of the Horizon, 
and not vifible. The Angles, efpecially as more exad- 
ly meafured on Monday, near Noon, when the fame 
Appearance return’d again, but more faintly, were as 
follows: Sun’s Altitude 22° \ } perpendicular Semidia- 
meter of the Halo 2 3 0 * ^ Diftance of the Rainbow from 
the Top of the Halo 23 0 } , Semidameter of the Arc of 
the 
