_--In the opium group, fulness of the sinuses
and veins of the brain, with effusion of serum into the ventricles and
beneath the membranes. In the belladonna group, nil. In the alcohol
group, signs of inflammation, congestion of brain and membranes,
fluidity of blood, long-continued rigor mortis.
4. =Poisons Acting on the Spinal Cord.=--Strychnine, brucine, thebaine.
The leading symptom is tetanic spasm.
5. =Poisons Affecting the Heart.=--These kill by sudden shock, syncope,
or collapse. They comprise prussic acid, dilute solution of oxalic acid
and oxalates, aconite, digitalis, strophanthus, convallaria, and
tobacco.
6. =Poisons Acting on the Lungs.=--These have for their type carbonic
acid gas and coal gas. The fumes of ammonia are intensely irritating,
and may give rise to laryngitis, bronchitis, and even pneumonia. Nitric
acid fumes sometimes produce no serious symptoms for an hour or more,
but there may then be coughing, difficulty of breathing, and tightness
in the lower part of the throat, followed by capillary bronchitis (see
p. 120).
VI.--DUTY OF PRACTITIONER IN SUPPOSED CASE OF POISONING
If called to a case supposed or suspected to be one of poisoning, the
medical man has two duties to perform: To save the patient's life, and
to place himself in a position to give evidence if called on to do so.
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