used to form a refrigerant beverage, which is given to
quench thirst in febrile and inflammatory diseases,

Lemon _juice_ given with carbonate of potash (half an ounce of the
juice to twenty grains of the salt), and taken while effervescing,
allays vomiting; a tablespoonful, taken occasionally, allays
hysterical palpitations of the heart, it is useful in scurvy caused by
eating too much salt food, but requires to be taken with sugar.

The _rind_ forms a nice mild tonic and stomachic in certain forms of
dyspepsia.

_Dose_ of the _infusion_ (made the same as orange peel), from one to
two ounces.

773. Antacids.

These are given to correct acidity in the system. They are soda,
ammonia, chalk, and magnesia.

774. Soda, Carbonate of, and Sesquicarbonate of Soda

Soda, Carbonate of, and Sesquicarbonate of Soda, are antacids and
deobstruents.

They are _used internally_ in acidity of the stomach and dyspepsia.

_Dose_ of both preparations, from 10 grains to half a drachm.

775. Antalkalies.

These are given to neutralize an alkaline state of the system. They
are citric acid, lemon juice, and tartaric acid.

776. Citric Acid

Citric Acid is used to check profuse sweating, and as a substitute for
lemon juice when it cannot be procured.

_Dose_, from ten to thirty grains.

777. Tartaric Acid

Tartaric Acid, when largely diluted, forms an excellent refrigerant
beverage and antalkali. It enters into the composition of
extemporaneous soda and Seidlitz waters.

_Dose_, from ten to thirty grains.

778. Escharotics.

These are remedies used to destroy the vitality of a part. They
comprise lunar caustic, bluestone, and solution of chloride of zinc.

779. Bluestone, or Sulphate of Copper

Bluestone, or Sulphate of Copper, is used in a solution of from four
to fifteen grains to the ounce of water, and applied to foul and
indolent ulcers, by means of rag dipped in it. It is rubbed in
substance on fungous growths, warts, &c., to destroy them.

_Caution_.--It is a poison.

780. Lunar Caustic; or Nitrate of Silver

Lunar Caustic; or Nitrate of Silver, is an excellent remedy in
erysipelas when applied in solution (one drachm of the salt to one
ounce of water), which should be brushed all over the inflamed part,
and for an inch beyond it. This blackens the skin, but it soon peels
off. To destroy warts, proud flesh, and unhea