specific
disease has so weakened the tissues that it never becomes the
characteristic full, tense pulse of a simple pneumonia.

On percussion of the chest dullness is found over the inflamed areas; on
auscultation at the base of the neck over the trachea a tubular murmur
is heard. The crepitant rales and tubular murmurs of pneumonia are heard
on the sides of the chest if the pneumonia is peripheral, but in
pneumonia complicating influenza the inflamed portions are frequently
disseminated in islands of variable size and are sometimes deep-seated,
in which case the characteristic auscultory symptoms are sometimes
wanting. From this time on the symptoms of the animal are those of an
ordinary grave pneumonia, rendered more severe by occurring in a
debilitated animal. The cough is at first hacky and aborted; later, more
full and moist. There is discharge from the nostrils, which may be
mucopurulent, purulent, or hemorrhagic. As in simple pneumonia, in the
outset this discharge may be "rusty," owing to capillary hemorrhages. We
find that the blood is thoroughly mixed with the matter, staining it
evenly, instead of being mixed with it in the form of clots. At the
commencement of the complication the animal may be subject to chills,
which may again occur in the course of the disease, in which case, if
severe, an unfavorable termination by gangrene may be looked for. If
gangrene occurs it is shown by preliminary chills, a rapid elevation of
temperature, a tumultuous heart, a flaky discharge from the nostrils,
and a fetid breath; the symptoms are identical with those which occur in
gangrene complicating other diseases.

_Complication of the brain._--At any time during the course of the
disease congestion of the brain may occur; at an early period if the
fever has been intense from the outset, but in ordinary cases more
frequently after three or four days. The animal, which has been stupid
and immobile, becomes suddenly restless, walks forward in the stall
until it fastens its head in the corner. If in a box stall and it
becomes displaced from its position, it follows the wall with the nose
and eyes, rubbing it along until it reaches the corner and again fastens
itself. It may become more violent and rear and plunge. If disturbed by
the entrance of the attendant or any loud noise or bright light, it will
stamp with its fore feet and strike with its hind feet, but is not
definite in fixing the object which it is resisting, which i