n success is anticipated, much to your chagrin you
have to deal with a fresh outbreak of canker, instead of a rapidly-healing
foot. Parenthetically, I may here remark that the amount of more or less
imperfect new horn produced by a cankered surface after an effective but
not too destructive cauterization is almost incredible, and one cannot fail
to be struck with the very active proliferation here compared with the
meagre production of new horn by the healthy surface.

'After all disease has been excised, carefully clean the foot with waste,
thoroughly protect any raw surface resulting from overcauterization by some
mild agent, such as a saturated calomel ointment, reapply an astringent
dressing over the whole affected surface, and nail on the shoe. This method
of procedure should now be thoroughly carried out daily for a time, and
as it is proceeded with a successful issue soon becomes assured in nearly
every case. Where, in spite of these efforts, the disease still persists,
depend upon it the fault is with the operator, who has failed to eradicate
some centre of infection. Under these circumstances it may be necessary
to recast the patient, repare the foot, and by the aid of eye, knife,
and cautery, endeavour to find the cause, and having found it, which can
invariably be done, remove it. The usual treatment will then speedily
become successful. As the case proceeds dressing every other day will
soon be sufficient, then twice a week, and finally, once a week until
sufficiently cured.

'During this healing process, and after the complete eradication of canker
it may be again repeated, no agent seems to have a more beneficial effect
than calomel, and for this purpose it is best used as a dry powder. Under
this dressing any remaining spot of canker is readily detected by the wet
condition of the calomel when the shoe is removed the next day. In dealing
with such a spot, a very good plan, after all apparently diseased tissue
has been excised, is to touch the cankered part with solid nitrate of
silver, or a feather dipped in one of the strong mineral acids, and
then reapply calomel over the surface. The result of this treatment is
frequently very gratifying.

'In successful treatment the shoe must be removed each time--an adjustable
plate will not do, as no man can thoroughly pare and examine a foot with
the shoe on, and imperfect dressings are worse than useless. Indeed, it is
better not to pare or thin the horn at all,