ns and soap-and-water washings.
The hair on and around the diseased parts is to be kept closely cut,
and, when practicable, depilation, or extraction of the affected hairs,
is advised; this latter is, in most cases, essential to a cure. Remedial
applications--the so-called parasiticides--are, as a rule, to be made
twice daily. If an ointment is used, it is to be thoroughly rubbed in;
if a lotion, it is to be dabbed on for several minutes and allowed to
soak in.

#Name the most important parasiticides.#

Corrosive sublimate, one to four grains to an ounce of alcohol and
water; carbolic acid, one part to three or more parts of glycerine; a
ten per cent. oleate of mercury; ointments of ammoniated mercury,
sulphur and tar; and sulphurous acid, pure or diluted. The following is
valuable:--

[Rx] Sulphur, praecip., .................... [dram]ij
Saponis viridis,
Ol. cadini, ....... [=a][=a] ......... [dram]j
Adipis, .............................. [Oz]ss. M.

Chrysarobin is a valuable remedy, but must be used with caution; it may
be employed as an ointment, five to ten per cent. strength, as a rubber
plaster, or as a paint, a drachm to an ounce of gutta-percha solution.
Formalin, weakened or full strength, has been extolled. Some observers
have experimentally tried the effect of _x_-ray exposure with alleged
good results, pushing the treatment to the point of producing
depilation; if used great caution should be exercised.

#How is favus upon the general surface to be treated?#

In the same general manner as favus of the scalp, but the remedies
employed should be somewhat weaker. In favus of the nail frequent and
close paring of the affected part and the application, twice daily, of
one of the milder parasiticides, will eventually lead to a good result.

#Is constitutional treatment of any value in favus?#

It is questionable, but in debilitated subjects tonics, especially
cod-liver oil, may be prescribed with the hope of aiding the external
applications.

#Tinea Trichophytina.#
(_Synonym:_ Ringworm.)

#What is tinea trichophytina?#

Tinea trichophytina, or ringworm, is a contagious, vegetable-parasitic
disease due to the invasion of the cutaneous structures by the vegetable
parasite, the trichophyton, or the microsporon Audouinii.

#Do the clinical characters of ringworm vary according to the part
affected?#

Yes,