The herald and mail. [volume] (Columbia, Tenn.) 1873-188?, 1875-09-03
Cold, Fog, Mist and Air.

bility of fog and mist may have it,
temperature reduced, according to th'
experiments of NJ. Renou, as low as 81
36 and As degrees below the freezing
point of water and still remain LIQUID
This fact is important in comprehend
ing the injury done to cotton plants by
cold nights, heavy fogs and mists, which
deprive tender vegetables and animals
of their proper warmth much faster
than dryer atmosphere would do. Ole
people whose blood is chilled and life
feeble experience the greatest incon.
venience from dense fog or moderate
rain to carry off their little animal heat,
Fogs naturally become impregnated
with all deleterious exhalations from
impure surfaces, whether swamps,
lakes, rivers or cities !; and it is we'll to
kindle fires in living or sleeping rooms
to expel that humidity which is so ready
to ca:oi and hold all organic poisons
that may float in the atmosphere.
Keep out of the fog as much as posi-
BILE. After the sun has dispelled it, you
may walk, ride or drive in a different
climate, for solar heat removes not only
impure vessicles from the air, but
microscopic organisms which are the
germs of all malaria. Flammarion
found these in his aernnautical excur-
sions over nine thousand feet above the
surface of the cath. Currents of wind
and air carry fine dust to an equal
height and all know that the suns heat
moves the atmosphere. Kaemtz has
taken a great number of measurments
of the diameter of the vessicles of mist
in Central Germany and Switzerland.
They are smallest in July and August.
The least were 55-100, 900 of an inch in
diameter.
How cloud or visible vapor is formed
in the atmosphere where one did not
exist few months before may be worth
plain statement. Let us suppose a
certain quantity of air at Sc degrees
contains 478 grains of invisible water,
the air being quite transparent. If
from the descent of colder air the tenn
perature falls from Sc to " degrees, or
it receives an accession of moisture it
Will become obaque. A cloud is formed.
A diminution of nine degrees of heat
will cause 108 grains of vapor of water
to be condensed and become visible as
a mist or cloud. Condense these clouds
still farther and rain is produced. Dew
is atmospheric moisture percipitated on
grass, forest leaves and other surfaces
which absorb atmospheric heat as the
surface of pitcher of ice-water. It is
not alone the wet feet and garments that
make walking in dew, especially the
heavy dews of autumn, unhealthy.
One is liable to inhale parasites which
may fasten on the liver, spleen or other
organs, and develop chills and fever. A
n on hnrcahocb
that will attack Ole on foot, both pass
ing over the same malariOUs ground.
Hence it is better to ride than walk into
a swamp to hunt stock, or for any pur-
pose. Draining low, wet ground, is
conducive to health, and therefore to be
1t will improve our eli
mate for cotton, grapes, and other fruit.
An excess of dampness is very injurious
on many accounts.
BoussingauIt has endeavored to meas
ure the average fall of dew per square
yard on his farm inAlsace. After night,
when the dew has fallen abundantIy, he
visited his meadows on the banks of the
river SaUer before sunrise; there by the
aid of a sponge, he soaked up the water
over forty-three square feet of grass,
which he placed in bottle and weighed.
In some instances it was found to exceed
two pounds in weight. Dew and mist
contain about the same proportions of
ammonia and nitric acid !: and both are
favorable to growing plants like grass,
turnips and cabbage.
At fourteen degrees of temperature,
one grain of water saturates a cubic
foot of air but if the air be raised to
one hundred degrees, it takes twenty
grains of water to saturate it. These
facts show how much heat has to do
with the capacity of air to transport
another. At 212 degrees the air is
capable of absorbing a quantity of
Vapor of water equal to its own volume.
Imagine every cubic foot of air over an
acre of ground to the height of 1000
feet to be saturated with water at a
of 100 degrees, and that
mass of cold air should fall upon it
sufficient to reduce the heat to 40 de-
yrees. Every square foot would receive
10000 grains of water in a sudden
leluge.
The air and its phenomena are not
studied. Tyndall says :
' The suppression for a single summers
hight of vapor of water contained in the
ever England (and the
holds true for all the coun-
iries in similar latitudes) would be ac-
by the destl uctiou of all the
plants which are killed by frosts. In
he desert of Sahara, where the ground
s fire and the wind flame, the cold at
hight is often very difficult to support.
IN this hot country ice is seen to form |
n the course of the night
We have the highest authority for |
saying that three-fourths of mans |
laily food is air and all know that he |
leeds to inhale fresh air every minute, |
light and day, so long as life lasts. |
1t every breathing, the air that leaves |
he lungs contains one hundred times !
more carbonic acid, and therefore car
Jon, than it did when it entered the |
,rgans of respiration. With very |
title fuel vital air and water run the |
luman machine. A good engineer will /
tudy to keep it in first rate working |
rider, avoiding all extremes. All food |
must be burnt in some form in a ran, |
n do harm as something out of place. /
Breathing fog and poisons, sleeping in
,estiforous mists, drinking bad water
nd worse liquors, eating everything |
hat should be avoided, present many |
acts for contemplation and reform.
science is very suggestive, especially in
elling one what to do, when the air he
'reathes is full of voracious, invisible
There are extensive dis
riots where more persons in 1000 live
ow to be forty years old than formerly
ived to be twenty. Science more than
oubles the average length of life, and
ften adds ten fold to the laboring
mans power to support himself and
amily comfortably during his length
ned years. Air, water and sunshine
re not SO exclusive, nor so costly as
lany pretend. Science is the common
of humanity.-E1change.
A SCoTCH granite monument at Cam
riHuo Gffu Indiana |