The Bozeman courier., 1921-09-21


Of work which requires the expenditure
Of energn causes an Increase in the
of air needed in the lungs. If
a horse hauls laod up hill, trots
fast or does any kind of work the
breathing is increased in proportion.
Just the same is true with the cow.
If she is grinding feed all night and
secreting milk, large amount of en-
ergy is used so the supply of air
needs to be increased in proportion.
The cow could make little use of
her food if she did not have air to |
produce combustion in the body. 1t |
requires the same amount of oxygen
to convert a pound of grain or hay
into energy, carbon dioxide and water
within the body as it does in the stove.
When we want the fire to burn vigor-
ously in the stovewe open the drafts
in order that the supply of oxygen
may be increased. At the same time
the smoke and gases from the stove
increase and have to be removed thru
the chimney The heat energy pro-
duced by the stove is dependent upon
the air equally as much as the wood,
and neither is of use without the
other. The samet hing is true n the
animal body. Both food and air are
necessary to support combustion and
if the cow does not get the required
amount of air she cannot make use OF
all the food consumed.
! The best authorities claim that o
cow requires about 116 cubic feet OF
air per hour. At this rate, an average
cow will need 1904 cubic feet in
twenty-four hours or about 225
pounds. The cow at work will use
about Top ounds of hay, grain and
| water in day or about onethird as
much by weight as the right amount
of air required. In other words, the
cow required three pounds of air for
each pound of food consumed per day.
This will show the Importance Of plen-
ty of pure air for the hard working
dairy cow.
i ANY person who has been In q
crowded doom for few-minutes will
| fully realize how the breathing of
foul air will lower the vitality of
the body. This effect is produced be-
cause the expired air removes from
! the lungs a large quantity ofcarbon
dioxide together with moisture, and
small amounts of organicm after. If
these substances are rebreathed the
amount of oxygen in the lungs will
of necessity have to be reduced so the
bodily decreases according to the
amount of impurities in the breatheC
air. This fact can be demonstrated by
burning lamp in a well ventilated
room then placing it in a small room
poorly ventilated in which a number
of people have been kept for a while
The size and vigor of the flame car
be much reduced in the absence of the
pure air.
The question usually arises with
dairymen as to how the stable can
be properly ventilated and what
menas are necessary. The only way
to supply ventilation is to arrange
for the pure, fresh air to enter and
the impure, rebreathed air with its
iaod of maisture, gas and organic
matter t o escape. It does little good
to open the drafts of the stove with
out making provisions for the smoke
and gasses to escape, and it's is equal
ly as useless to open the dampers and
close the drafts in the door. In either
case the facilities for supplying the
air and removing the used up mater
ial are not complete.
There are several ways to provide
ventilation in cow stables. One good
way is to make openings in the walls
near the ground on the outside then
similar one inside so the air NAV
enter near the ceiling of the stable
and mix with the warm air before
it reaches the cows. The outtakes fol
this system requires flues of some
two feet square going from near the
floor out through the roof for the
removal of impure air. Other systems
make provisions so the air may enter
through openings above the widow:
and escape through flues similar as
that described. Any of the present
systems are more or less imperfect
at times but are far better than n,
means at ALL
A good way to tell whether the Gov
: stable is properly ventilated or no
is to enter it after it has been close,
FOR several hours and note the odor
IF the stable is free from bad odors
it is reasonably certain that an ampl
amount Of air has been provided an,
impure air removed. Often the vapo
from the breath of the animals vii
form in drops on the walls or freez
the form of frost. This is a sigl
that the air in the stable is owe
loaded with moisture and that tn
ventilation has not been sufficient t
remove the. -vapor. In winter tim
when the stable is closed tightly tn