_{2}.

_Treatment._--Transfusion of blood or saline fluid; stimulants.

=Sulphuret of Potassium= (liver of sulphur) occurs in mass or powder of
a dirty green colour; has a strong smell of sulphuretted hydrogen.

_Symptoms._--Of acute irritant poisoning, with stupor or convulsions.
Excreta smell of sulphuretted hydrogen.

_Post-Mortem Appearances._--Stomach and duodenum reddened, with deposits
of sulphur. Lungs congested.

_Treatment._--Chloride of sodium or lime in dilute solution, and
ordinary treatment for irritant poisoning.

_Fatal Period (Shortest)._--Fifteen minutes.

XVIII.--BARIUM SALTS

=Chloride of Barium= occurs crystallized in irregular plates, like
magnesium sulphate, soluble in water and bitter in taste. =Carbonate of
Barium= is found in shops as a fine powder, tasteless and colourless,
insoluble in water, but effervescing with dilute acids, and readily
decomposed by the free acids of the stomach. =Nitrate of Barium= occurs
in octahedral crystals, soluble in water.

_Method of Extraction from the Stomach._--Dialysis as for other soluble
poisons.

_Tests._--Precipitated from its solutions by potassium carbonate or
sulphuric acid. Burnt on platinum-foil, it gives a green colour to the
flame.

_Symptoms._--Besides those of irritants generally, violent cramps and
convulsions, headache, debility, dimness of sight, double vision, noises
in the ears, and beating at the heart. The salts of barium are also
cardiac poisons.

_Post-Mortem Appearances._--As of irritants generally. Stomach may be
perforated.

_Treatment._--Wash out stomach with a solution of sodium or magnesium
sulphate, or of alum, and give stimulants by the mouth and
hypodermically.

XIX.--IODINE--IODIDE OF POTASSIUM

=Iodine= occurs in scales of a dark bluish-black colour. It strikes blue
with solution of starch, and stains the skin and intestines
yellowish-brown. Liquid preparations, as the liniment or tincture, may
be taken accidentally or suicidally.

_Symptoms._--Acrid taste, tightness of throat, epigastric pain, and then
symptoms of irritant poisons generally. Chronic poisoning (iodism) is
characterized by coryza, salivation, and lachrymation, frontal headache,
loss of appetite, marked mental depression, acne of the face and chest,
and a petechial eruption on the limbs.

_Post-Mortem Appearances._--Those of irritant poisoning with corrosion,
and staining of a dark brown or yellow colour.

_Treatment._--S