When the precipitate is dried and heated on
platinum-foil, it disperses as white vapour with slight detonation.
Sulphate of lime in excess gives a white precipitate, soluble in nitric
or hydrochloric acid, but insoluble in oxalic, tartaric, acetic, or any
vegetable acid.
=Oxalate or Binoxalate of Potash= (salts of sorrel or salts of lemon) is
almost as poisonous as the acid itself.
XIV.--CARBOLIC ACID
=Carbolic Acid, Phenic Acid, or Phenol=, is largely employed as a
disinfectant, and is often supplied in ordinary beer-bottles without
labels.
_Symptoms._--An intense burning pain extending from the mouth to the
stomach and intestines. Indications of collapse soon supervene. The skin
is cold and clammy, and the lips, eyelids, and ears, are livid. This is
followed by insensibility, coma, stertorous breathing, abolition of
reflex movements, hurried and shallowed respiration, and death. The
pupils are usually contracted, and the urine, if not suppressed, is dark
in colour, or even black. Patients often improve for a time, and then
die suddenly from collapse. When the poison has been absorbed through
the skin or mucous membranes, a mild form of delirium, with great
weakness and lividity, are the first signs.
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