The Kevin review. [volume] (Kevin, Mont.) 1922-1929, 1924-07-10
FARM PAGE

SdTy IOr the proper COuUuSllOu duC
assimilation of her food and a very
small amount of carbon dioxide. In
respiration, oxygen is taken in anG
carbon dioxide given off. When all
is inhaled, a part of the oxygen il
contains is utilized by the body and
Wehen 1t is exhaled it is warmer thar
when taken into the lungs and 1T con-
tains a reduced amount of oxygen
and an increased amount Of carbon
dioxide absorbed from the body. Ow-
ing to the fact that the per centage of
carbon dioxide is usually the test of
the degree of ventilation, it is fer
q~uently assumed that it is a. poison.
This, however, is not the case. Car
bon dioxide should not be confused
with carbon monoxide, a gas which
often forms when siloS are filled or
O gas engine operated in a closed
room, and which causes many deaths.
In "a hours a COW will exhale from
IL to Is pounds of moisture and a
somewhat smaller amount of carbon
dioxide. 1t will be seen, therefore,
that if the COW were quartered in al
air tight barn, so that she would be
forced to breath the same air re-
peatedly, the amount of oxygen in the
air would be steadily reduced and its
stability for breathing correspond
ingly impaired and the air would
soon become warm, moist and of a
bad odor.
'To avoid this condition the air in
the barn must be constantly replaced
by fresh outside air, and it was sug-
gested by King that for the mainten-
ance of satisfactory conditions, $500
cubic feet of air per COW per hour
should be supplied. In order to per-
nit the entrance of the fresh air an
equal amount of used air must be
displaced, and in order to do this a
circulation must be established. This
is the function of the ventilation sys-
tenn.
The heat given off by the animals
stabbed in the barn must be emu
ployed to maintain the temperature
at a comfortable degree and also as
the motive power to produce circula-
ton of the air; hence there must be
enough generated to insure adequate
circulation of air without lowering
the temperature to an uncomfort-
able degree. 1t is possible to main
tain a comfortable and fairly uniform
temperature in a well-built barn and
yet be an appreciate circulation of
air. Tests have shown that the guam
lily of milk yield is affected by sud-
len changes in temperature. Cows
end to give somewhat less milk when
he temperature changes suddenly
1ut the effect isonly temporary.
Sudden changes in temperature are
inbarns which have a we'll
regulated ventilation system. Good
with the consequent di-
ution of the impurity of the air, is :
he aim of all systems of ventilation,
Tut in operating the system the COM :
ort of the animals must be consid- /
red as we'll as purity of the air. 9
Poor ventilation causes damp, ]
vet barns. Inthe colder sections of \
he United States, unventilated barns {
re frequently found in which the Z
oofs and ceilings are dripping wet
With condensed moisture, a condi- h
ion which is the cause of serious
osses due to the moulding of the
eed and hay stored in the building. /
he feeding of moldy hay to dairy !
ows cause additional losses. <
Excessive moisture on the roof Z
cards and the rafters causes mold q
ng and rotting, and instances could y
e cited in which timbers in new /,
arms, where such a condition was I
ermitted, have completely rotted !
IF in a few years. Moisture causes '
of steel equipment, iron 9
ipes and other metal parts. +
Ventilation aids in the proven Z
ion of spontaneous combustion in :
he hay mows and graneries. Lack of !
pace will not permit a full discus >
ion Of this phase of the ventilation +
roblem, which is nevertheless an .
Important one. The reader will no {
oubt recall incidents in his own ex- =
erience in which fires have occurred i
i hay barns, especially in those in .
hitch Iegumnious hays were stored.
these fires result in total loss
S facilities for fighting fires are in ;
lost instances lacking. =
while the loss of feed and the de- :,
of timbers may constitute !
lrge economic losses, the mainten- :,
nee of the health of dairy animals ,
of greater Importance, because the !
of citizens of this country is !.
realty dependent upon the consump- =
of the products of this class of l
lrm animals and the wholesomeness =
I these products. The effect of poor =
s~ntilation is often not apparent I'M !
| the damage is done. Continued Y
-eathing of foul, damp air lowers =