Elimination of Arsenic--Question of Accumulation of Arsenic, 553 737. Antidotes and Treatment, 553, 554 738. Detection of Arsenic--Identification of Arsenious Acid in Substance--Test of Berzelius--Identification of Arsenites and Arseniates--Detection of Arsenious Acid in Solution-- Distinguishing Marks between the Sulphides of Tin, Cadmium, Antimony, and Arsenic--Marsh’s Original Test for Arsenic-- Blondlot’s Modification of Marsh’s Test--Distinguishing Marks between Arsenical and Antimonial Mirrors--Reinsch’s Tests, 554-560 739. Arsenic in Glycerin, 560 740. Arsenic in Organic Matters--Orfila’s Method of Destroying Organic Matter--Extraction with Hydrochloric Acid--Modifications in the Treatment of Oils--Resinous Matters--Experiments on the Distribution of Arsenic by Scolosuboff, Ludwig, and Chittenden-- The Question of Contamination of a Corpse by Arsenical Earth, 560-562 741. Imbibition of Arsenic after Death--Mason’s Case, 563-565 742. Analysis of Wall-Paper for Arsenic, 565, 566 743. Estimation of Arsenic--Galvanic Process of Bloxam--Colorimetric Methods, 566-568 744. Destruction of the Organic Matter by Nitric Acid, and Subsequent Reduction of the Arsenic Acid to Arseniuretted Hydrogen, and Final Estimation as Metallic Arsenic, 568-571 745. Arsine developed from an Alkaline Solution, 571 746. Precipitation as Tersulphide--Methods of Dealing with the Sulphides obtained--(_a_) Solution in Ammonia and Estimation by Iodine--(_b_) Drying the Purified Precipitate at a High Temperature, and then directly weighing--(_c_) Oxidation of the Sulphide and Precipitation as Ammonia Magnesian Arseniate, or Magnesia Pyro Arseniate--(_d_) Conversion of the Trisulphide of Arsenic into the Arseno-Molybdate of Ammonia--Conversion of the Sulphide into Metallic Arsenic, 571-575 747. Conversion of Arsenic into Arsenious Chloride, 575, 576 2. _Antimony._