Iron County register. [volume] (Ironton, Iron County, Mo.) 1867-1965, 1904-12-29
MILK PAIL.

COVERED MILK PAIL.
somewhat toward the side of the pail
Another funnel, which is loose, fits in.
side of the first one. When the pail is
to be used a few layers of clean cheese
cloth are placed across the opening OF
the lower funnel and the loose funnel
is pushed in to hold the cheese cloth in
position. The whole apparatus is sim.
pie in structure and can be easily
cleaned.
The method of the experiment was to
compare the amount of dirt in samples
from the two pals. In order to have the
conditions as nearly uniform as possible,
two cows were chosen, which gave about
equal quantities of milk, and required
about the same time to milk. These
cows stood side by side in the stable, and
were MIXED by the same man each time.
On one day COW No. 1 was MIXED into
the open pail and COW No. 2 into the COW
cred pail; and on the next day the order
was reversed, COW No. 2 being MIXED
into the open pail and COW No. 1 into the
covered pail.
The milk in each pail was then thor.
oughly stirred and a sample taken and
tested for the amount of dirt it con-
tanned.
The amount of dirt in the milk from
the covered pail was only 81 per cent
of that in the open pail, while the amount
of dirt in the strained milk was 53.4 pei
cent. of that in the milk not strained.
In other words, the cover excluded G.
per cent, while the strained removed
less than AZ per cent. The differencesi in
the two samples varied more widely in
the latter tests than in the former. In
the strained milk the amount of dirt re-
moved depended largely upon the nature
of the dirt. .
By the use of the covered pail an av-
erage of 20 per cent. Of the total mum.
Der of bacteria and Al per cent. of the
acfd-producing bacteria were excluded
from the fresh milk. By straining the
milk as soon as drawn into the ordinary
open pail an average of but II per cent
of the total number Of bacteria and Ii
per cent. of the acid-prodAcing species
were removed.
After the milk had stood for SO hours,
at a constant temperature of 20 degrees
F., the samples from the covered pail
contained a smaller number of bac-
terra in the majority of the tests than did
the samples from the open pail, yet the
covered pail sample frequently con-
tanned the larger number. In each test
the number Of ac%id-producing bacteria
was smaller in the sample from the GOV.
cred pail. In the strained milk both the
total number of bacteria and the num-
Der of acid-producing bacteria were
larger than ia the milk not strained.
While the data at hand will not war
rant any positive conclusions, yet it is
probable that the large numbers in the
strained milk are due tothe rapid growth
Of certain species not removed by
straining which are able to develop more
rapidly because Of the removal of GER
tain species which if present would an
tagonize their growth.
The milk from the covered pail usual
ly curdled somewhat sooner than that
from the open pail, the average differ
ence being about seven hours; likewise
the strained milk in most cases curdled
sooner than the milk not strained, the
average difference being also about seven
hours.
The fact that the keeping properties OF
the milk were not increased is of little
practical value, since the milk used In
these tests kept on the average nearly
2H days at a constant temperature o.
70 degrees before curdling. This means
that it would have kept for about fvt
days had it been kept at the usual tenn
perature for handling and marketing
milk. This is considerably longer thar
milk is ordinarily required to keep.
The results of these tests indicate tina
the covered pail is much more efficien'
8 for the production Of pure milk than i!
s the straining of milk drawn into an oper
pail. 1t is quite evident, also, that tt
keep the dirt out of the milk in the frs
place is much better than to strain i
t out after the milking. A considerable
portion Of the dirt dissolves quickly il
e the warm milk, and thus introduces {
contamination that cannot be strained
out.
d These tests were made in a dair.
where the conditions Of cleanliness ar,
good, as is shown by the small quantitie.
of dirt found ever in milk from the opel
pail. The use of the covered pail woult
doubtless prove to be even more eficien
where the conditions were not SO gca4.