_Post-Mortem Appearances._--Congested condition of brain and membranes; inflammation of gastric mucous membrane. _Treatment._--Emetics freely; infusions containing tannin, as coffee, tea, oak-bark, galls, etc. Stimulants. Hypodermic injection of 1/120 grain of aconitine. _Method of Extraction from the Stomach, etc._--Use Stas-Otto process. _Tests for Digitalin._--A white substance, sparingly soluble in water, not changed by nitric acid; turns yellow, changing to green, with hydrochloric acid. The minutest trace of digitalin moistened with sulphuric and treated with bromine vapour gives a rose colour, turning to mauve. This is very delicate, but in experienced hands the physiological test is more reliable. The chemist who has had no practical experience in pharmacological methods would be wiser to keep to his chemical tests. XLIV.--NUX VOMICA, STRYCHNINE, AND BRUCINE =Nux Vomica= consists of the seeds of the _Strychnos nux vomica_. From these strychnine and brucine are obtained. The symptoms, post-mortem appearances, and treatment, of poisoning by nux vomica are the same as for strychnine. =Strychnine= is a powerful poison, and forms the active ingredient of many 'vermin-killers.' It occurs as a white powder or as colourless crystals, with a persistent bitter taste; very slightly soluble in water; more or less soluble in benzol, ether, and alcohol. _Symptoms._--Sense of suffocation, twitchings of muscles, followed by tetanic convulsions and opisthotonos, each lasting half to two minutes. Mental faculties unaffected, face congested and anxious; eyes staring, lips livid; much thirst. The period of accession of the symptoms varies with the mode of administration of the poison. Symptoms, as a rule, come on soon after food has been taken. Patient may die within a few hours from asphyxia or from exhaustion. In _Tetanus_ there is usually history of a wound; the symptoms come on slowly; lockjaw is an early symptom, and only later complete convulsions; the intervals between the fits are never entirely free from rigidity. Death is delayed for some days. _Post-Mortem Appearances._--Heart empty, blood fluid, rigor mortis persistent. Hands usually clenched; feet arched and inverted. Congestion of brain, spinal cord, and lungs. _Treatment._--Emetics or stomach-pump if the patient is deeply anaesthetized. Tannic acid and permanganate of potassium. Bromide of potassium 1/2 ounce with chloral 30 grains, repeated if necessary. _Fatal Dose (Smallest)._--Quarter of a grain. _Fatal Period (Shortest)._--Ten minutes; usually two to four hours. _Method of Extraction from the Stomach._--The alkaloid may be separated by the process of Stas-Otto.