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a-terpinene acetic acid acetic anhydride acetone alkali anhydrous antimony antimonyl tartrate aqueous solution arsenic ascaridole barium c.c. of water Calc cent Chem Chemical Research Laboratories chloroform colour colourless compounds concentrated corr crystallisation crystallises from water dilute diminished pressure dissolved distilled dried material ester ether ethyl acetate evaporated to dryness extracted filtrate flattened prisms formed formerly USA Found fraction glyoxaline grams grams of sodium heated hydrated hydro hydrochloric acid hydrogen chloride hyenanchin hypophosphorous acid insoluble isolated loss at 110 melting point methyl alcohol mixture molecules of water obtained oxidation permanganate picrate picric acid potassium powder precipitate prepared quantity reaction readily soluble reduction requires H20 Research Laboratories Henry residue ROBERT GEORGE FARGHER salvarsan separated silver nitrate sodium carbonate sodium hydroxide sodium hyposulphite soluble in water solvent sparingly soluble substance sulphuric acid terpene tion turicine vacuum water of crystallisation Wellcome Chemical Research whilst Z-hyoscine