seeds, and apply warm fomentations of milk and water to the blistered
surface. The _period required_ for a _blister_ to remain on varies
from eight to ten hours for adults, and from twenty minutes to two
hours for children: as soon as it is removed, if the blister is not
raised, apply a "spongio-piline" poultice, and it will then rise
properly. When it is required to act as a rubefacient, the blister
should remain on from one to three hours for adults, and from fifteen
to forty minutes for children.

_To dress a blister._--Cut the bag of cuticle containing the scrum at
the lowest part, by snipping it with the scissors, so as to form an
opening like this--V; and then apply a piece of calico, spread with
spermaceti or some other dressing. Such is the ordinary method; but a
much better and more expeditious plan, and one that prevents all pain
and inconvenience in the healing, is, after cutting the blister as
directed above, to immediately cover it with a warm bread and water
poultice for about an hour and a half, and on the removal of the
poultice to dust the raw surface with violet powder; apply a
handkerchief to retain the powder, and lastly dust the part every two
hours. It will be healed in twelve hours.

_Caution._--Never attempt to take cantharides internally, except under
the advice of a medical man, as it is a poison, and requires extreme
caution in its use.

768. Burgundy Pitch

Burgundy Pitch is warmed and spread upon linen or leather, and applied
over the chest in cases of catarrh, difficult breathing, and hooping
cough; over the loins in debility or lumbago; and over any part that
it is desirable to excite a mild degree of inflammation in.

769. Chemical Remedies.

These comprise refrigerants, antacids, antalkalies, and escharotics.

770. Refrigerants.

These are medicines given for the purpose of suppressing an unnatural
heat of the body. They are Seville oranges, lemons, tamarinds, nitre,
and cream of tartar.

771. Seville Oranges

Seville Oranges and sweet oranges are formed into a refrigerant
beverage, which is extremely grateful in febrile diseases.

The _rind_ is an agreeable mild tonic, carminative, and stomachic.

_Dose_, of the _tincture_, from one to four drachms; of the
_infusion_, from one to two ounces.

[TO-MORROW, LOATHSOME IN THE SIGHT OF ALL.]

772. Lemons

Lemons are