. Essentials of medical and clinical chemistry. With laboratory exercises . gastrium, purging, cramps, thirst, fever, rapid pulse, etc., endingin collapse. Smallest fatal dose is two grains, and death usuallyoccurs in twenty-four hours. Treatment.—Remove any unabsorbed poison from the stomachby emetics or stomach-pump. The best antidote {}i is freshly pre- 104 Antidote—Demonstration.—Pour into a beaker an inch of FeCL. solution,add ammonia water until alkaline, strain the precipitate of Fe3HO on a clothand wash till clear of ammonia, and then stir fresh precipitate into anotherbeaker containin


. Essentials of medical and clinical chemistry. With laboratory exercises . gastrium, purging, cramps, thirst, fever, rapid pulse, etc., endingin collapse. Smallest fatal dose is two grains, and death usuallyoccurs in twenty-four hours. Treatment.—Remove any unabsorbed poison from the stomachby emetics or stomach-pump. The best antidote {}i is freshly pre- 104 Antidote—Demonstration.—Pour into a beaker an inch of FeCL. solution,add ammonia water until alkaline, strain the precipitate of Fe3HO on a clothand wash till clear of ammonia, and then stir fresh precipitate into anotherbeaker containing an inch of arsenic water. After five minutes, hlter the mix-ture and show by the foregoing tests that the filtrate is free of arsenic. 68 ESSENTIALS OF CHEMISTRY. cipitated ferric hydrate, made by adding aqua ammoniae to asolution of a ferric salt. Dialyzed iron, being a solution offerric hydrate, may be used. It should be given at frequentintervals and in tablespoonful doses. Tests for Arsenic.—The ordinary tests for arsenic are given inthe laboratory notes be


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