ng favorable in ten or twelve days after the
beginning of the attack, convalescence is delayed by the fluid in the
chest failing to be absorbed. The animal becomes dull and weak and
evinces little or no desire for feed. The breathing becomes still more
rapid and difficult. An effort must now be made to excite the absorption
of the effusion. An application of liniment or mild blister should be
rubbed over the lower part of both sides and the bottom of the chest.
The following drench may be given three times a day, for seven or eight
days, if it is necessary and appears to benefit: Tincture of the
perchlorid of iron, 1 ounce; tincture of gentian, 2 ounces; water, 1
pint. Also give 1 dram of iodid of potassium, dissolved in the drinking
water, an hour before feeding every night and morning for a week or
two.

_Hydrothorax_ is sometimes difficult to overcome by means of the use of
medicines alone, when the operation of tapping the chest is performed to
allow an escape for the accumulated fluid. The operation is performed
with a combined instrument called the trocar and cannula. The puncture
is made in the lower part of the chest, in the space between the eighth
and ninth ribs. Wounding of the intercostal artery is avoided by
inserting the instrument as near as possible to the anterior edge of the
rib. If the operation is of benefit, it is only so when performed before
the strength is lowered beyond recovery. The operation merely receives a
passing notice here, as it is not presumed that the nonprofessional will
attempt it, although in the hands of the expert it is attended with
little danger or difficulty.

We have described here bronchitis, pneumonia, and pleurisy mainly as
they occur as independent diseases, but it should be remembered that
they merge into each other and may occur together at one time. While it
is true that much more might have been said in regard to the different
stages and types of the affections, and also in regard to the treatment
of each stage and each particular type, the plan adopted of advising
plain, conservative treatment is considered the wisest on account of
simplifying as much as possible a subject of which the reader is
supposed to know very little.

PLEUROPNEUMONIA.

This is the state in which an animal is affected with pleurisy and
pneumonia combined, which is not infrequently the case. At the beginning
of the attack only one of the affections may be present, but the other
soon foll