The Lamar register. [volume] (Lamar, Colo.) 1889-1952, 1906-04-18
SHOWING PROPORTION OF
FRESH AIR TO COW.


as will carry 81 pounds OF water: for
the horse we would have to pump 49,
2O3 pals: for the COW, S,4l2; for the
pig, 2,2O9: for the sheep. 2,lIS; and
even for n single hen we should lie
obliged to pump as many as 10 pail
fuls, Fortunate it is for man. and
more fortunate for his domestic ami
mails, that all have been fash ,onei to
live at the bottom of an ocean OF air,
miles in depth, eternally in motion.
1t will be clear from what has been
said that no dimensions sufficiently
large are practical in the construction
of stable room which will permit h
sufficient amount of air to be enc set
to meet the needs for any considerable
length of time. and hence. where many
animals are brought together. cubic
feet of space is not the essential. l: Is
cubic feet of air per unit of time, pass
ing through the stable. which is the
all-important consideration. Only so
much height of ceiling and such hori-
Zontal Dimensions as Will give ade-
quate working room for the care of the
stock need be provided, and in cold
climates the higher the stable ceiling
is above the floor the colder will 1t be,
and for cowstables eight to nine feet is
an ample height for the ordinary feed
ing purposes. Even for horse stables
nine feet in the clear is sufficient to
prevent any possibility of horse hurt
ing himself by throwing his head up.
In order to meet the needs of 20 cows.
having an average weight of 1000
pounds, to secure the degree of purity
of air which has been assumed. 1t Is
necessary to provide ventilating fiue
whose cross section is two square feet.
| and through which the air viii move
at the mean rate of about three miles
per hour, or 26i feet per minute.
! Larger animals should be provided
with proportionately larger supplies Of
/ air. Forty cows would require ven
| tilating hue, or fiues. having an aggre-
| gate cross section double that for 20
! cows. while for 60, so, and 100 cows the
ventilatins fiues should have capacity
| three. four and five times. respectively.
| that needed for 90. For ten horses a
! fiue 20 by 20 inches is required; for 40
sheep one is by IS inches; and for 20
hogs, one 16 by 16 inches.
II must be remembered, writes Prof.
F.. II. King, in the Rural New Yorker.
| in providing for a smaller number of
animals than has been named, 1t will
not do to reduce the size of the ventil-
ating hue corresponding amounts, and
especially Is this true where the build
inss are low and the ventilating hues
will be short, because with the small
nues the internal friction Is relatively
great and, where the flues are short.
neither the effect of difference In tenn
perature nor of wind suction across
the top is as great, and so, in provid-
ing nues for poultry houses, or any
others which are usually correspond
ingly low, even If the number of ami
mails to be cared for is small, the cross
section of the fue should seldom be
much less than three-fourths, to full
square foot. In the single story struc-
lures, which have many windows and
doors, especially where they are con-
structed of wood, the openness of struc-
ture is usually so great that it Is only
where a large number of animals are
kept together, or where the walls are
of masonry, with windows and doors
tight. tina. special provision for ventil-
alton is important.