The Hartford republican. (Hartford, Ky.) 18??-1926, 1915-06-18

\ substances OF the VapOr breathed out
/ from the lungs of an animal and
| injected a small amount as cubic
centimeters) into a rabbit and the
rabbit died from the effect of the
poison.
The percentage of dust particles
and bacteria in the air of stables
depends upon the degree of cleanli-
ness practiced upon the circulation
of air. Many forms of bacteria in
crease in decaying organic matter
and cracks or crevices collect refuse
which decays and serves as an in
cubator for bacteria to be later pick
ed up by the air. Unless the air is
changed sufficiently often to prevent
its becoming too throughly impreg-
mated with dust and bacteria. they
become a serious detriment and mem
ace to animals breathing it,
a Preventive Of Disease.
Sleeping out of doors where ven-
tilation is thorough and complete
has been found the most effective
treatment fer a number of human
ailments. and also one of the best
preventative measures. In the same
manner good ventilation is an effec-
tive preventative of disease in stock
1t is now generally recognized that
germs of tuberculosis, hog cholera,
and many other contagious diseases
are likely to be breathed into the
lungs almost any day and it is there
fore important that animals be kept
in vigorous condition at all times in
order that they may be sble to re-
sist an invasion of disease. When
they are forced to breathe air which
has been used over and over until
its oxygen supply is largely exhaust
ed, their systems are weakened and
germs can more easily gain a foot
hold. Add to this the fact that poor
ventilation forces an animal to resist
the same germ not only once but sew
eral times and you can readily real
ize how, under such conditions, germs
will soon become so numerous in the
air that an animal already weakened
by an insufficient amount of oxygen
cannot longer protect itself against
them.
to
take out all the impure air and re-
place it with fresh, pure air. By
ventilation, pure air is admitted and
foul air expelled, but they become
mixed to some extent in the process. !
With this in mind, it is evident that |
there is always certain percentage |
of impurities in the air of buildings. |
Just how great the percentage of inn
purity may be without detriment !
has never been definitely determined. ,
but in planning systems of ventila-
ton IL is generally assumed that if |
air in a building is changed at such |
a rate as to never contain more than |
about four per cent of air which has
been breathed, the ventilation is
good.
Accurate observations have been
made of the amounts of air breathed
by different animals I'm a given length
of time. Based upon these observa-
tons and the rate at which air should
be changed to prevent its becoming
with impurities. Profess
sor F. II. King has made the follow
ing estimate as to the amount of air
which should be supplied to a stable
per hour for different animals; for a
horse weighing 1000 MS, 1926 Gu.
it,; for COW equal weight, 3542 Gu.
IT.; for a 150fb hog 1892 Gu. it,,
Just to give a little better idea of
the meaning of these figures. the !
of air per hour necessary to
give proper ventilation for a horse |
weighing 100Oibs., would little
more than fill box stall sixteen feet
opudi' anu oiAA''h itNA HlSns
This does not mean that an animal |
needs the amount of stable space |
mentioned; it refers to cubic feet of
air and not cubic feet of space. SO
far as ventilation is concerned. only |
sufficient space need be provided to
give ample room in caring for the
animals, but the air must be changed |
often enough TO keep it pure.
II is not necessary TO provide elab-
crate or expensive equipment but il is
essential TO so arrange the ventila-
ton device that the foul air will be
removed and pure air admitted by
taking advantage of the natural for
ces which cause movements of air.
Ii is not necessary TO postpone the
installation of an efficient system of
ventilation until the erection of