opening is ultimately
effected by the pressure of pus from the centre of the tumor.

"The swelling often presents an irregular surface, and various centres
of maturation exist; but the evacuations only effect a partial and
temporary reduction of its bulk, in consequence of the continued
extension of the morbid growth and ulcerative process which often
proceed towards the pharynx, rendering respiration and deglutition still
more difficult, until at length the animal sinks from atrophy or
_phthisis pulmonalis_.

"In the early part of my practice, having been frustrated in my attempts
to establish healthy action in these ulcers, and referring to the works
that I had on surgery for information, I concluded that they bore some
resemblance to cancer in the human being, and determined to attempt
extirpation. Subsequently, numerous cases have occurred in which I have
successfully carried that determination into effect. I have had some
instances of failure, which failure always arose from some portion of
the morbid growth having been left.

"In the first stage, I have reason to believe that the tumor may be
dispersed by the general and topical use of the iodurets. After the
suppuration, I have tried them in vain.

"As soon as the nature of the tumor is clearly developed, I generally
attempt its removal, and, when most prominent by the side of the larynx,
I proceed in the following manner:--Having cast the beast, turned the
occiput toward the ground, and bolstered it up with bundles of straw, I
proceed to make an incision through it, if the skin is free, parallel
with, and over, and between the trachea and _sterno-maxillaris_,
extending it sufficiently forward into the inter-maxillary spaces. If I
find it firmly attached to the apex of the tumor, I then enclose it in a
curvilinear incision and proceed to detach the healthy skin to beyond
the verge of the tumor.

"Its edges being held by an assistant, the knife is directed downwards
through the subcutaneous parts, and all those that exhibit the slightest
change from healthy structure are removed.

"By tying any considerable blood-vessel before dividing it, and by using
the handle of the scalpel and the fingers in detaching the portion of
the parotid gland towards the ear the hemorrhage was always
inconsiderable.

"The wound is then treated in the ordinary way; except that detergents
and even antiseptics are often needed to arouse healthy action, and the
addition of some