infection. The most effective treatment that the writer has ever used is
the following formula recommended by Dr. Law: Arsenous acid one dram,
sulfate of iron five drams, powdered areca nut two ounces, common salt four
ounces. This is sufficient for one dose for thirty sheep. It may be given
with the salt, or in ground feed. If the flock is apparently healthy, four
doses given at intervals of three days is sufficient. If symptoms of
stomach worms are manifested the animals should be dosed daily until they
have received from five to ten doses, depending on the condition of the
animal.

INTESTINAL WORMS OF SHEEP.--The most widely distributed and seemingly most
injurious intestinal worm of sheep is the _OEsopliagostomum columbianum_.
It is a small worm from 0.5 to 0.75 inch (12 to 18 mm.) long. It penetrates
the lining membrane of the intestines and encysts in the intestinal wall. A
tumor, varying in size from that of a millet seed to a hazelnut, then forms
in the wall of the intestine. These tumors undergo a cheesy degeneration,
and when mature, may appear as greenish, cheesy-like masses, covering a
large portion of the lining membrane of the intestine. Diarrhoea and
emaciation may result. These symptoms are most evident during the winter
months.

_The treatment_ recommended for ridding sheep of this intestinal worm is
largely preventive. Very little can be done with the medicinal treatment of
a sheep whose intestinal tract is badly infested with this parasite. Good
care and the feeding of a proper ration are the only curative measures that
are effective in such cases. The occasional administration of a vermifuge
for the purpose of ridding the digestive tract of worms, together with the
frequent changing of pastures during the spring and summer, are the most
effective preventive lines of treatment. The same treatment recommended for
stomach worms may be used for this disease.