Lamoille newsdealer. [volume] (Hyde Park, Vt.) 1860-1877, 1872-01-03

for here almost perpetual
winds favor the evaporation Of snow, ice,
aud water, aud thus cause a quick aud
falling Of the temperature.
The reasons why the air on high noun
tains, is cooler, although the sun burns
hotter there, are, therefore, in the FIRST
place, the two simple facts Of more active
radiation and quicker evaporation ofmOis-
ture. But there is third reason. fami-
liar TO all who have ever ascended high
mountaipstops They will not be aptlo
have forgotten the magnificent spectacle
spread out before them on fine thorning,
when the air was still and the sky clear.
All the valleys were covered as with q
CHASTITY shroud of dense dismal mists but
the very first ray of the rising sun, kissing
the dim, gray surface, sent a sudden
shuddcr OF life through this vast motion
less oceah. The mass begins slowly to
swell and to rise, assuming thousand
marvellous and grotesque shapes, moving
wearily from place to place, and drifting
from valley TO valley. But. all Of sud.
den, it seems to make n gigantic effort
it rises deliberately and breaks into clouds
which look as it they were striving tt
climb up the steep mountain,sides. Their
enormous balloons rise majestically into
the air; their long, thin bands wander of
into snow-covered abysses, or hang dis
hevelled and torn upon point aud peak
Immense horizontal masses cut the noun
tain in two, halfway up the summit, oil
light, feecy clouds wander purposeles
from side to side Here and there tn,
mass is torn asunder, and the delighted
eye pluuges down into the deep valley
discerning, far below the smiling plain
lowered meadows, and silvery brooks
with here happy village, clustering
around the tiny chapel, and there a hrigh
lake, looking like twinkling eye gazlni
up into the blue sky. Many Of thes
clouds melt away as they rise higher ant
higher, and are seen no more ;others rcacI
the top and euvelOr the traveller for
time then they ascend far above him
and form huge white vault on the darI
sky. The mists of the plain, and the va
pors of the mountain, have transformo
into gell-rounded masses of clouds, whc
often conceal thunder aud lightning with
in their dark, gloomy cavities. But wha
mysterious power has forced them all {
leave the lowly valleys, to rise higher an
higher, and to lose themselves finally j
the blue ether? 1t is the ascending cuI
rent of air. For, as the newly-kindle
fire causes a powerful current tha
rushes up the chimney, and thus force
the smoke follow it upward, so the noun
tain-sides, warmed by the newy-rise
sun, cause the air, which they heat, t
ascend aud to carry the. clouds with j
high above the Alpine SUBMITS. Below
in the plain, this air was subjected to th
enormous pressure of the whole mass {
the atmosphere the higher it rises, tn
more this pressure diminishes, and the all
consequently, cools eff as it expands
is this expansion of the air of the ascend
lDg CurTeUtS. anu ltS CUuScuucub Idpi
cooling off, which makes the higher rc
gions so cold in comparison with the ten
perature of the valley. Although, there
4 fore, the sun heats the lofty mountain
more powerfully than in the plans, S
:. that Alpine lakes, fed by the melting {
J glaciers, never freeze in winter, this aC
vantage is utterly lost by several causes
and the air on high mountains is consiC
crably cooler than in the plains. Thes
causes are, the more active radiation at
high elevation, the cold produced by a,
tive evaporation, and the cold caused-b b
the expansion of asceding currents of al
The guests of the ilustrious sarant al
sented, and thus pleasant chat and
friendly exchange of views, on a brigl
F summer afternoon, led to the discover
of a law which had been unknown before
but which now holds prominent plat
in the favorite science of our day and
our people-meteorology.-SoH D
VERE.--In the Appleton's Journal.