or fifteen hogs each. The drugs should be mixed and divided into the same
number of powders as there are lots of hogs. Ground feed is placed in the
trough, dampened with milk, or water and the powder sprinkled evenly over
it. The hogs are then allowed to eat the feed. It is best to dose them in
the morning after they have been off feed for ten or twelve hours.

VERMINOUS BRONCHITIS IN CALVES.--The lung worms of cattle, _Strongylus
micrurus_ and _Strongylus pulmonaris_, may cause heavy losses in calves and
yearlings. Older cattle may harbor these parasites, but they do not seem to
be inconvenienced by them. The _S. micrurus_ is from 1 to 3 inches (25 to
75 mm.) long. The _S. pulmonaris_ is smaller. It is from 0.4 to 1.3 inches
(10 to 35 mm.) long. They are found in the trachea and small bronchial
tubes, where they are mixed with mucous secretions from the inflamed lining
membrane of the bronchial tubes.

Wet seasons and low, wet pastures are said to favor the development of lung
worms. Their life history is not fully understood. They do not persist
generation after generation in the air passages of an animal, but the eggs
and embryos are expelled and live for a time outside of the animal, when
they may again become parasites of another or the same host.

_The symptoms_ are the same as occur in bronchitis and pneumonia. Calves
and yearlings are the only animals in the herd that may show symptoms of
the disease. The air passages become irritated and inflamed, and the calf
shows a slight cough. As the inflammation increases and the worms and
mucous secretions plug up the small bronchial tubes, the coughing spells
become more severe and rattling, wheezing sounds may be heard on
auscultating the lungs. The calf finally loses its appetite, becomes
emaciated and weak, and wanders off alone. It is usually found lying down
and shows labored breathing that is occasionally interrupted by paroxysmal