ith restrictions of all kinds. It is included in Part I.
of the Poisons and Pharmacy Act (8 Edward VII., c. 55). No arsenic may
be sold to a person under age, nor may it be sold unless mixed with soot
or indigo in the proportion of 1 ounce of soot or 1/2 ounce of indigo at
the least to every pound of arsenic.

=Arseniuretted Hydrogen= (arsine, AsH_{3}) is an extremely poisonous
gas, and is evolved in various chemical and manufacturing processes.
When damp, _Ferro-silicon_ evolves AsH_{3} and PH_{3}, both very lethal
gases. _Ferrochrome_ is used in making steel, and it also evolves
PH_{3}, and in such extreme dilution as 0.02 per cent. may cause death.

XXII.--ANTIMONY AND ITS PREPARATIONS

=Tartar Emetic= (tartarized antimony, potassio-tartrate of antimony)
occurs as a white powder, or in yellowish-white efflorescent crystals.
Vinum antimoniale contains 2 grains to a fluid ounce of the wine.

_Symptoms._--Metallic taste, rapidly followed by nausea, incessant
vomiting, burning heat and pain in stomach, purging. Dysphagia, sense of
constriction in throat, intense thirst, cramps, faintness, profound
depression; in fatal cases, giddiness and tetanic spasms. In _chronic
poisoning_, nausea, vomiting and purging, weak pulse, loss of appetite,
debility, cold sweats, great prostration, progressive emaciation. The
symptoms in chronic poisoning may simulate gastritis or enteritis.
Externally applied, it produces an eruption not unlike that of smallpox.

_Post-Mortem Appearances._--Inflammation, softening, and an aphthous
condition of the throat, gullet, and stomach, the last reddened in
patches. In chronic poisoning, inflammation also of caecum and colon.
Brain and lungs may be congested. Decomposition is hindered for long.

_Treatment._--Promote vomiting by warm greasy water, or the stomach-tube
may be used. Cinchona bark or any preparation containing tannin, as tea,
decoction of oak bark, etc. Morphine to allay pain.

_Fatal Dose._--In an adult 2 grains (same as arsenic).

_Fatal Period._--Death follows in eight to twelve hours, from
exhaustion.

_Method of Extraction from the Stomach._--The contents of the stomach or
its coats should be finely cut up and boiled in water, acidulated with
tartaric acid and subjected to dialysis, or strained and filtered. Pass
hydrogen sulphide through the filtered or dialyzed fluid until a
precipitate ceases to fall; collect the sulphide thus formed, wash and
dry it. Boil the ora