hair first closely shaved off the part) with some of the
tincture of the same drug, applied by means of a camel's hair brush. As
iodine soon separates and is thrown down to the bottom, all the
preparations of it should be used as freshly made as may be convenient.
The mixture of which iodine is the active ingredient, and which is a week
old, may be confidently said to have lost the major part of its virtue.
Every three or four days this medicine should be concocted; for even when
put into pills, iodine, being very volatile, will evaporate. The quantity
to be given to the dog varies, from a quarter of a grain four times a day
to the smallest pup, to two grains four times daily to the largest dog.
The tincture used for painting the throat is made with spirits of wine, an
ounce; iodide of potassium, a drachm.

RESPIRATORY ORGANS.

The Larynx of the dog is affected in various ways. It is called a "little
box," and the projecting part of this organ is, in the throat of man,
spoken of as "Adam's apple." It opens at the back part of the mouth, and
is placed at the beginning of the windpipe. All the air that inflates the
lungs must pass through it, but it will permit nothing else to enter with
impunity. A drop of saliva, or the smallest particle of salt, will be
sufficient to call forth the most painful irritability. In fact the lining
membrane of the larynx is the most tender or sensitive structure in the
body; and, as parts are exposed to suffering just in proportion as they
are endowed with sensation, of course, the organ so finely gifted is often
the seat of disease.

The dog's larynx has many peculiarities. It is very complicated, and
exquisitely constructed. Few persons have, perhaps, much attended to the
notes of the animal's voice; but those who will observe the sounds may
find these take a range far more wide than is generally imagined. The
dog's voice is remarkably expressive, and to my ear speaks very
intelligible music. The deep growl is not without variety; for by the
feeling of the animal that emits it the note is always modulated. The
rumble of expostulation the favorite gives utterance to when the master
pretends to take away its bone does not resemble the rattle of joy with
which the child's playmate accompanies a game of romps. Both, however,
are distinct from the suppressed warning with which the watchdog announces
the advancing stranger, or the sharp defiance by which he signifies his
determination