Contained in St. Ignatius’s bean—False Angostura bark—_Nux Vomica_, &c.—Properties of strychnia—Facility of detection. _Tests_: (1) Microscope—(2) Taste—(3) Color test; ditto in other alkaloids, in bile, and in resinous and saccharine matters—(4) Physiological test (Marshall Hall)—(5) Bichromate of potash—(6) Picric acid—(7) Sulphuric acid and sodium nitrite—(8) Mercuric chloride. Preparations of strychnia: _Vermin killers_—Battle’s, Gibson’s, Miller’s, Marsden’s, Barber’s, Hunter’s, Keating’s—_Brucia_—_Igasuria_—_Igasuric acid_. _Doses of strychnia_: medicinal, fatal, recovery—_Nux vomica_. _Fatal period_ for strychnia—_Symptoms_ in man, commencement of symptoms, if given in powder, in solution, in pills. _Explanation of symptoms_: by hysteria, tetanus, epilepsy, gritty granules on spinal cord—Angina pectoris. _Post-mortem_ appearances—Treatment—Antidotes—Dr. Taylor’s evidence—Ptomaine—Did Cook die from morphia?—_Granular preparations_ at St. Thomas’s Hospital 276 CHAPTER VI. TRIALS FOR POISONING BY ARSENIC 294 (1) Madeline Smith (_Glasgow Case_), June, 1857. (2) Ann Merritt (_Clapton Case_), March, 1850. CHAPTER VII. ARSENIC. The element (arsenicum)—The oxide (white arsenic)—Arsenicum—Arsenicum trioxide. Forms of: (1) Crystalline—(2) Amorphous—Solubility. Uses and occurrences: (1) Steeping, wheat—(2) Preservation of skins—(3) Antiseptics—(4) Glass making—(5) Fur in boilers—(6) Candles—(7) Preservation of wood—(8) Sheep washes—(9) Scheele’s green and emerald green as pigments in sweets (case of Franklin and Randall), wall papers, toys, &c.—(10) Medicinal—(11) For horses—(12) Tooth-stopping—(13) Aniline dyes—(14) Fireworks—(15) Rat and fly poisons (case of Maria Gage)—(16) For cleansing metals—(17) Arsenic eaters—(18) Cosmetics—(19) For bronzing metals—(20) Beer brewed from glucose—(21) American paper collars—(22) Speculum metal—(23) Inhalation for asthma and bronchitis—(24) Mineral waters. Sulphides of Arsenic: (1) Orpiment (case of M. A. Burdock)—(2) Realgar. Arsenic acid—The arsenates—Arsenic trichloride—Arseniuretted hydrogen—Methods of extraction—Tests—Modifications of old processes suggested—Marsh’s test, distinction of results in arsenic and antimony—Reinsch’s test—Doses—Antidotes—Physiological effects—Remarks—Did L’Angelier commit suicide? 373 CHAPTER VIII. TRIALS FOR POISONING BY ANTIMONY 397 (1) Dr. Pritchard (_Glasgow Case_), July, 1865. (2) Dr. Smethurst (_Richmond Case_), August, 1859. (3) Thos. Winslow (_Liverpool Case_), August, 1860. CHAPTER IX. ANTIMONY.