e same manner. The chief
difficulty in removing the latter is experienced in the lateral lacunae of
the frog, where it is most conveniently scraped away with a spoon or sharp
curette. Professors Hoffmann and Imminger also operate in the same way,
applying an Esmarch's haemostatic bandage, and using the knife and curette
freely.[B]

[Footnote A: _Ibid_., vol. ii., p. 68.]

[Footnote B: _Veterinary Journal_, vol. xxxv., p. 433.]

Haemorrhage is afterwards arrested, and a dressing of perchloride of mercury
(a solution, 1/2 per cent., in equal parts of alcohol and water) applied.
The after-dressings succeeding best are those of _slightly_ caustic and
astringent agents, preferably in the form of a powder, and held in position
by carbol-jute pads and linen bandages applied with a certain amount of
pressure.

The same author draws attention to the fact that caustic agents such as
nitrate of lead, chloride of zinc, etc., act too powerfully if the bleeding
has been arrested and the wound disinfected. They then form a thick crust,
under which profuse suppuration takes place. The same agents are likewise
contra-indicated when haemorrhage is still present. In this latter case
they combine with the blood to form metallic albuminates, which lie as an
impenetrable layer on the surface of the wound, and so hinder the action of
drugs on the tissue below.

During his after-treatment, Bermbach advocates removal of the dressings
every second day, all cheesy material to be scraped away with the knife,
and the sublimate lotion to be used again. He also insists on the animal
being kept standing in a _dry stable_,--nothing but a stone pavement kept
clean--and put to regular work in a plate shoe after the first or second
week. Cure of advanced cases is said to be obtainable in from four to six
weeks.

As illustrative of the value of pressure in the treatment of canker, we may
also draw attention to a treatment advocated by Lieutenant Rose.[A] This
observer holds that adequate pressure is unobtainable by packing the foot,
and, to obtain it, removes the wall from heel to heel, much after the
manner of preparing the foot for the Charlier shoe, so that the _whole_ of
the weight is taken by the sole and the frog. Tar and tow is then lightly
applied, the foot placed in a boot, and the patient turned into a
loose-box. The dressing is repeated at intervals of four or five days until
the animal is cured.

[Footnote A: _Veterinary Record_, vol. x