Blackfoot news. (Blackfoot, Idaho) 1891-1902, 1894-03-24
HOW VACCINE is MADE.
ITS PRODUCTION is A CURIOUS
PROCEEDING.
Method, Of the Operator In Obtaining
tho Virus From n Nsecinatsd Cow
some Cows wili Not Produce Active
Lymph The POINTS.

During the first four years OF my
vaccine experience" said Dir. Potit
10 Chicago Herald reporter, III
used heller calves exclusively, SO.
Letting the best | could find But
after considerable study on the sub.
Ject ! filled my stable with fresh
mulch COWS, with calves to suclxle
them. This / soon found impractic-
able without first vaccinatlng the
COWS themselves. and thus suddenly
fell into the habit Of using the cow
lymph instead OF that produced from
the calves.
"Ihis soon found to be more re-
liable than the calf lymph, much
more easily obtained. and in so much
larger quantities, that | gradually
abandoned the use of calf lymph
altogether. believe the use of
calves. especially II young. results in
the degeneration Of the vaccine dis
ease and the production OF what is
known among propagators as straw
berry eXcrescence.
The process is very simple. In
order TO secure all the vaccine when
mature. and to make neat work. the
COWS are placed in stalls. with the
movements OF their hind limbs care
fully impeded. A pole is placed in
slanting position on each side OF tho
hind foot, and the animal cannot
step about TO any great extent
Then the operator shaves ali the hair
from the back part OF the hind legs.
from the hips down 10 the knee
Joint In the broader portions OF
this part OF the anatomy there are
located the milk-glands, and il Is
there the propagation proposes to SO.
cure his lymph. The shayen parts
are sponged OF clearly and then
marked with numerous little scarf
ticatlons. much like tho old newspa-
per Illustrations OF window. Into
these little cut places portion OF
warm nuid lymph. taken from a COW
in the advanced stages Of the pro-
ductIon Is poured. being gently and
persistcntly rubbed by the operator
Till he is satisfied all the lymph has
been absorbed
Then the animal IS placed on an
elevated platform aud made entirely
comfortable while the disease pro.
crosses, The little cuts first seem
70 heal over Then IN few days
tho scabs grow larger aud larger till
they extend almost over the entire
hind portion OF tho log, In seven
days the cow Is ready for the next
operation. The affected part is
darker and each little point OF scarf
ilcation Is swollen and raised. like a
blister. with bit OF depression la
the center
The blister is puncturcd or IN some
cases removed. Underneath lies tho
liquid serum or vaccine lymph. ns Il
IS called. Then. upon the ordinary
ivory points, with which ali the
children in Chicago have been re.
Gently made familiar the operator
gathers his store. lie docs il simply
by dipping the points in the
spot Of serum before him and
laying them down in order on tray
which he holds on his lap as he sits
behind the animal.
Tho parts treated will continue to
seerete lymph for several days. when
tho secretion comes more and more
slowly, dries up. and clogs the chan.
nels through which 1t has flown. and
finally subsidies to scab Four or
five days later this Is ready 70 DO
removed. There is in Il small
quantity Of real lymph. but there Is
more OF hair. membrane and other
foreign material. That gathered on
the ivory points is pure, and contains
no other substance. But OF the |
latter much vaceiuatirg material is
made.
After being thoroughly dried the /
ivory points are put up in packages !
OF ten and are made proof against |
either air or water They are then |
ready for the market The product |
secured from the last dry 'scab" is I
also prepared and pulvorized, II |
has certain strength and commands [
a ready sale.
There are good many ways 10
make & point safe IL sometimes
happens that COW will not produce
active lymph. No matter how well /
tho blisters may appear they will not
yield virus that will prevent small
pox No one can tell by looking at
COW whether her product will /
prove effective. 1t Is like certain
persons upon whom no amount Of
vaccination will "take.
70 provide against any loss on this
account, points are dipped often in
the lymph Of Two cows. IL is not
likely two will be found standing to.
gether neither of which is good.
And these points are marked with q
double X. and are sold ut a higher
price. And still others are dipped in
tho lymph OF three cows, marked with
three KS, and sold at still higher
price. They can hardly fail of eff
fectiveness.
Vaccine points should always be
fresh Their potency dies in year
TO great extent,
The ivory points are treated
chemically before being used, that
"a 4.