Amador ledger., 1906-06-22
and one of the rodents should be forth.

with dispatched to Secretary Wilson.
He will be glad to get it
OF course, every one knows that the
gopher problem is a serious one in
many parts of the West, and the rab-
bit pest has at times threatened to
devastate Australia, and even Cali
fornia. Altogether the small animals
do a great amount of damage, but
most people do not realize what its
aggregate really is. Yet in one coui--
ty Of the state of Washington last
year field mice destroyed at least
half a million dollars worth of prop
erty, while in the same time wolves
in Wyoming alone mulcted the stock
men of $1,000,0O0 worth of cattle,
while the damage from field mice, and
similar little ''varmints" throughout
the United States, especially in the
West and South, amounted to many
millions.
TASK OF THE SCIENTISTS.
To cope with these pests is one Of
the most interesting tasks Of the
biological survey of the Department of
Agriculture. 1t has been working in
quiet way for several years, and has
about come to the conclusion that al
though it is possible to trap, poison
and otherwise reduce the pests in
many instances, the thing that is
really needed is a contagious disease
that can be bottled up in the labor
atory and distributed to do its own
work on an infinitely more effective
scale than can traps and poisons.
That there is some such disease, or
that one can be produced, the scien-
lists of the department do not doubt.
The trouble up to date has been
to find it. The biological servey is
working in conjunction with the
bureau of animal industry. Some
promising leads have been struck, but
none Of them have turned out to be
lust what was wanted. For instance,
while they are working with one dis
ease now that is fatal to a certain
breed of field mice, it will not touch
others, and the rats laugh at it in
conscious immunity. Also there are
plenty Of contagious animal diseases
that could be turned loose on the rats
ground squirrels, and rabbits, but as
they would kill horse just as quickly
as they would a rat, they are not
wanted.
ERNEST THOMPSON SETONS
FIND.
Some years back the survey lost
lust the chance it has been looking
for. Ernest Thompson Seton was T
in Canada, where there was a pest OF
rabbits, and noticed that they were
rapidly dying out. Some mysterious
disease was carrying them off, and il
was not long before the country was
almost cleared of them. He realized
that this disease might prove valuable
and managed to catch some sick rGb
bits which he shipped to laboratory
in New York, but the problem was no
lust in the biologists line, and he die
not realize the immense importance
Of it, so the secret was not grasped
Now the biological survey is looking
out for similar occurrences, and if the
opportunity offers, will make the mos
of them.
There is a field mouse disease tha
is harmless to domestic animals, ant
the survey is trying hard to make i
virulent enough to do business witt
some of the larger pests. 1t promise
well, but the scientists have had to-
many disappointments to be braggin
in advance. They are, however, act
ually trying to reinforce the diseas
and make it worse than it has prove'
I'D to date This is getting pretty dee
into the network of germology ant
toxic science. 1t means really breed
ing I'D disease germs on somewhat tn
same plan that plants and animals ar
now bred by the department. Blu
there is a hope that they may be abl
to do something with it. AnyhoI
they are trying.
There has been number of report
from abroad of the wonderful thing
foreign psychologists have succeede
in doing in the line of contagious dis
eases for small animal pests, bu
though cultures have been bougt
abroad and tried faithfully here, n
results have ever been obtained. Som
of the germs have proved fatal to til
animals that ate them, but the sam
is true of any sort of poison that ca