or from a breaking down
of the lung substance, or from specific disorders.

Bleeding from the lungs comes from both nostrils and from the mouth. The
blood is bright red, frothy, and accompanied with a cough, the flow being
somewhat profuse and intermingled with mucus. It may cease of its own
accord. Internally hemostatics are indicated, and locally over the sides
cold applications have a tendency to check the hemorrhage. A drench of
1-1/2 drams of gallic acid dissolved in a pint of water should be given.

ABSCESS OF THE LUNG.

Abscesses of the lung sometimes form during the course of or subsequent to
tuberculosis or other diseases. An animal affected with abscess of the lung
usually has a protracted, feeble cough and a general appearance of
emaciation and anemia. The pulse is feeble and the breath foul. An
offensive discharge from the lungs frequently occurs. Percussion and
auscultation aid in making a diagnosis in this condition. The appetite is
poor. Such animals go from bad to worse, and their prompt destruction
would, as a rule, be to the interest of the owner.

HYDROTHORAX.

Hydrothorax, or dropsy of the chest, is not a disease in itself, but is
simply a condition in which an effusion takes place in the chest cavity,
and is the result or effect of some disease, mostly pleurisy. It can be
easily diagnosed by physical signs. A loss of the respiratory murmur will
be noticed on auscultation, and on percussion dullness or flatness on a
line as high as the effusion has taken place. When a large amount of
effusion is present, tapping with the trocar and cannula is generally
resorted to. The proper method of performing this operation will be found
under the head of "Pleurisy."

PNEUMOTHORAX.

An accumulation of gas in the pleural sac is known as pneumothorax. The
presence of air may result from either an injury of the lung or a wound
communicating from the exterior. The indications for treatment are to
remove any foreign body that may have penetrated, to exclude the further
entrance of the air into the cavity by the closure of the external opening,
and to employ antiseptics and adhesive dressings. The air already in the
cavity will in most cases be absorbed.

VERMINOUS BRONCHITIS.

This is a disease that sometimes attacks young cattle when pastured in
low-lying meadows near rivers subject to flood. It is caused by a small
worm, _Strongylus micrurus_, which lodges in large numbers in the trachea
and bron