The Wolf Point herald., 1924-07-10

Sary for the proper combustion an
assimilation of her food and a yer
small amount of carbon dioxide. L
respiration, oxygen is taken in an
: carbon dioxide given off. When al
is inhaled, part of the oxygen /
contains is utilized by the body AM
wehen it is exhaled it is warmer thai
: when taken into the lungs and it con
tainS a reduced amount of oxygel
and an increased amount of carbon
dioxide absorbed from the body. Ow
ing to the fact that the per centage o.
carbon dioxide is usually the test Of
the degree of ventilation, it is fer
Quently assumed that it is a poison
This, however, is not the case. Car
bon dioxide should not be confused
with carbon monoxide, gas which
often forms when silos are filled or
gas engine operated in a closed
room, and which causes many deaths.
In "a hours 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 an
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 en-
ployed to maintain the temperature
at comfortable degree and also as |
the motive power to produce circula- |
ton of the air; hence there must be |
enough generated to insure adequate |
of air without lowering
the temperature to an uncomfort-
able degree. 1t is possible to main
,ain a comfortable and fairly uniform
in well-built barn and
yet be an appreciable circulation of
air. Tests have shown that the guam
.ity of milk yield is affected by sud-
len changes in temperature. Cows
end to give somewhat less milk when
he temperature changes suddenly
)ut the effect isonly temporary
sudden changes in temperature are
Ivoided inbarns which have a we'll
egulated ventilation system. Good
circulation, with the consequent di-
ution of the impurity of the air, is :
he aim of all systems of ventilation,
ut in operating the system the COM :
ort of the animals must be consid- /
red as well as purity of the air. a
Poor ventilation causes damp, \
ret barns. Inthe colder sections of \
be United States, unventilated barns Q
re frequently found in which the 4
oofs and ceilings are dripping wet
nth condensed moisture, condi- b
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. Y
Excessive moisture on the roof r
cards and the rafters causes mold a
lg and rotting, and instances could v
e cited in which timbers in new y
arms, where such a condition was 4
have completely rotted .
IF in a few years. Moisture causes
listing of steel equipment, iron G
ipes and other metal parts.
Ventilation aids in the preven- r
on of spontaneous combustion in =
le hay mows and graneries. Lack of y
pace will not permit a full discus =
on Of this phase of the ventilation =
roblem, which is nevertheless an -
nportant one. The reader will no :
oubt recall incidents in his own ex- =
erience in which fires have occurred =
/ hay barns, especially in those in q
hich legumnious hays were stored.
sually these fires result in total loss
) facilities for fighting fires are in 9
ost instances lacking.
"While the loss of feed and the de- v
ruction of timbers may constitute y
rye economic losses, the mainten- =.
ice of the health of dairy animals II
of greater Importance, because the ie
salth of citizens of this country is n
'eatly dependent upon the consump- II
on of the products of this class of IL
rm animals and the wholesomeness q
these products. The effect of poor II
,ntilation is often not apparent un- Ie
the damage is done. Continued o.
'eathing of foul, damp air lowers q