' . _ * - • j ✓ ' * 
t J« ] 
lion was now and then hid by dark Clouds. (17) The 
thin white Clouds, with which the Northern Part of 
the Sky was overfpread, reach'd up to the Zenith . 
(18) Soon after my firft obferving the 'Parhelion B, as 
I look'd up to the Zenith , I faw the beautiful Rain- 
bow CDE parallel to the Horizon, with its Horns 
turn'd to the North. It had the ufual Colours of the 
Rainbow, all very diftinft. The Purple was on the 
Side facing the Sun 5 next to it was the Yellow, then 
the Green, and laft the Azure. (19) A Line drawn 
from the Sun's Centre to the Middle D of the Ins 
tended to the Zenith , and was a Portion of that ver- 
tical Circle, in which the Sun then was. (20) The 
Point D was 61 Degrees diftant from the Horizon; 
wherefore the Diameter of the Rainbow was y8 De- 
grees : (21) However, there was but Part of the Rain- 
bow CDE feen, the Ends of which were fometimes 
but 38 Degrees from one another: For more or Ids 
of it appear’d at different Times, but fcarcely above 
a fourth Part of its Circumference at any Time. (22) 
It was fometimes feen among fmall white Clouds, 
which were about the Zenith , and fometimes in a 
clear Sky. It lafted till the Sun and moft part of the 
Sky was overcaft by thick Clouds. (23) The Thick- 
nefs of the Rainbow C K, as well as I could eftimate 
by the bare Eye, was one Degree of a great Circle. 
But as the neighbouring Houfes prevented my have- 
ing a free Profpeft Eaftward from my Garden, I went 
to another Place, whence I had a full View of the 
Hemifphere. And having reach'd thither a little before 
Eleven, I immediately faw another Parhelion A to the 
Eaft,* (24) 20 Degrees from the Sun, as the foregoing 
was, and raifed 1 j Degrees above the Horizon. (25) 
This 
