nimal's
body and tied in a secure knot, and a careful attendant must remain with
the cow during the entire period that the instrument is in place. The rim
surrounding the mouth of the cannula should be in contact with the skin.
Whenever the person in charge of the cow is convinced that gas has ceased
to issue from the cannula the instrument should be removed.

The trocar is to be used only in extreme or urgent cases, though everyone
who has had experience in treating indigestion in cattle realizes that he
has saved the lives of many animals by its prompt application.

When the tympanitic animal is not distressed and the swelling of the flank
is not great, or when the most distressing condition has been removed by
the use of the trocar, it is best to use internal medicine. Two ounces of
aromatic spirits of ammonia should be given every half hour in a quart of
cold water; or half an ounce of chlorid of lime may be dissolved in a pint
of tepid water and the dose repeated every half hour until the bloating has
subsided; or 1 ounce of creolin in 2 quarts of tepid water may be given at
one dose or carefully injected through the cannula directly into the paunch
to stop fermentation and the consequent formation of gas. It is generally
necessary to give a moderate dose of purgative medicine after bloating has
subsided, as animals frequently show symptoms of constipation after attacks
of indigestion. For this purpose 1 pound of Glauber's salt may be used.

The animal should be fed carefully upon easily digested food for several
days after the bloating has subsided, so that all fermenting matter may
pass out of the stomach.

CHRONIC TYMPANITES.

Cattle, especially those that have been kept in the stable all winter, are
liable to suffer from chronic tympanites. In this form they bloat up after
feeding, but seldom swell so much as to cause any alarm. The chronic form
of indigestion may also follow an acute attack like that previously
described. This is also a symptom of tuberculosis when the lymphatic glands
lying between the lungs are so enlarged as to press upon and partly occlude
the esophagus. It may develop in calves as a result of the formation of
hair balls in the stomach.

_Treatment._--Treatment should be preceded by a moderate dose of purgative
medicine: 1 pound of sulphate of magnesia (Epsom salt) or sulphate of soda
(Glauber's salt), half an ounce of powdered Barbados aloes, 1 ounce of
powdered ginger, 1 pint of m