... . v ho!eorm 
such sphere exist, an l be humied ui # 
part of solids, or any matter that is v 
lra „.p:,. 
see u i“ j - >f ; ^ le 
balloon to disap- 
; causes a pin to 
rent, the reason v. e do not 
same as that which causes a 
pear when vert' high, or such a 
disappear when held between a candle and a 
person’s eve, the candle be inf two fret; oiscuu 
a .,d the pin about three inches. Toe pnnmpte 
of refraction bends downwards rays of bght f' om 
.vile on passing over the top of a persons 
linos owin.f to a sifiail atmosliphero 
-P el 
id us—this piancjpic 
a o 
head 
itrou! 
the rays ot 
riof. 
also 
would tend to bend 
>f light'eaeh way round a sphere or 
Whether the equinoctial storm, which is 
cool, be owing' to the transit of another 
soiiere, or the central arrival of a single outer 
one, on the disc of the sun, will also need fur- 
?!u j .r investigation. There is reason to believe 
that these acmes, or periods, are about as fluctu¬ 
ating as to the time of their occurrence on *dif- 
ferent years, as is that of the equinoctial storm; 
they are commonly attended by occasional slow 
rains, without much thunder ov wind, .-veeni 
their commencement. The time of sunshine , 
between these periods, is as hot as if the rays 
were conveyed through a glass or any transpa¬ 
rent lens, or as they should be if they leached 
us through a convex section of a sphere of water { 
or other dense fluid. Whether it be a variation 
of temperature that produces a variation of wind 
or vice versa, appears to deserve consideration. 
Most, or all the swallow kind, north of tne 
30th degree, rise in the air, by large flocks and 
disappear (for some months) about this acme, 
namely, about the 20tli cf August, as Wilson 
says Wilson’s work on Ornithology, shows 
that between October and February, in Hondu¬ 
ras, the swallows rise from the earth in large 
volumes every morning, very early, and return 
in the evening, with great force and commotion; 
but whether they go out of sight, or remain all 
day flying through the air, he does not say. 
The small strip appearing half across the disc 
of Mars, about his equator, (which one of the 
figures in my arctic memoir shows) is most prob¬ 
ably a ring or sphere of solids: And if Mars 
who lias no moons, has a ring around his equa¬ 
tor, the earth having a large moon, should most 
probably have one or more, especially if we ad¬ 
mit the narrow belts of Jupiter to be a succes¬ 
sion of rings or spheres, for he has several 
moons; we know that saturn, who also has seve¬ 
ral moons has one or more rings. Several other 
reasons of like bearing have occurred to me, 
^hich the reasonable limits of a sketch of this 
koiihgloes not admit of including. 
JOHN OLE YES SYMME3. 
* TheljjL Y. Evening Post, gives an account of 
frost at Providence, Rhode Island, on the night 
.of’the eJd August,—-this shows that the cold was 
general and not local. 
