A.—Poisons acting on the Brain.
1. Narcotics.—Symptoms: Giddiness; dimness of sight; contracted pupils; headache; noises in the ears; confusion of ideas, and drowsiness, passing into insensibility.
British Plants included: Papaver somniferum.
2. Deliriants.—Symptoms: Spectral illusions; delirium; dilated pupils; thirst and dryness of the mouth; incoordination. Occasionally, though rarely, there are paralysis and tetanoid spasms.
British Plants included: Datura Stramonium, Hyoscyamus niger, Solanum Dulcamara, Solanum nigrum, Atropa Belladonna, Lolium temulentum.
3. Inebriants.—Symptoms: Excitement of cerebral functions and of the circulation; loss of power of coordination and of muscular movements, with double vision; leading to profound sleep and deep coma.
British Plants included: Pinus pinaster, Pinus larix, Artemisia maritima, Artemisia Absinthium.
B.—Poisons acting on the Spinal Cord.
Convulsives.—Symptoms: Clonic (intermittent) spasms, extending from above downwards. Opisthotonos very violent; but trismus (lockjaw) rare. Swallowing spasmodic. Death, usually, in less than three hours, or rapid recovery.
British Plants included: none.