64 Remarks upon Bleaching. 
by the Spanish Mathematicians while triangulating the An- 
des. It has also been seen by some Aeronauts of late years. 
I do not remember to have seen the Zodiacal light in high 
latitudes, but I think that Parry states that he saw something 
of the kind at Melville Island, in the point of the heavens op- 
posite to the sun, before he reappeared above the horizon, in 
the spring. . 
While on optical phenomena, I must mention the follow- 
ing as noted in my journal in the Pacific. 
“Ship Jupiter, July 13th, 1824, Lat. 14° North, Lon. 189° 
W. This afternoon I was gratified with a most beautiful and 
_ unusual sight, viz. part of four distinct concentric rainbows, 
the usual angle with the sun, -and was r st; the 
ers diminished in size and brightness, but the prismatic 
colors were distinctly seen in each, and were all in the same 
r. The secondary bow, often seen at a distance from 
all united to each other. The principal or outer bow made 
be broader than that which was single. The sun was about 
12° above the western horizon, shining through the interstices 
of a very dense broken cloud ; each aperture appeared almost 
as bright as a sun,* and which I supposed produced the dif- 
ferent bows. The wind was from the direction of the bows, 
nd in a few minutes afterwards a shower of very fine rain 
fell, and the bows disappeared,” 
P.S. General Humphreys told me that on a morning of 
a 4th of July, in Connecticut, about sunrising, he saw to the 
westward, and opposite to the sun, beams of light radiating 
from a point, and those who had never seen or heard of such 
a thing before, considered its appearance on that day as 
ominous. This was no doubt the Zodiacal light. 
ae ee 4 
4 ree 
es kes 
~ Aer. VIEL— Remarks upon Bleaching. 
"Communicated for this Journal. 
‘Tue improvements made in the art of Bleaching during 
the last half century, have in some measure ieterta the 
° 
~ 
