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In this paper the author describes the method adopted by him for the separation of the three classes of hydrocarbons forming the more volatile portion of the distillate. On treatment with bromine in presence of water, the naphtha is entirely converted into a heavy oil, containing the Cn Hn series chemically, and propyle and benzole me­chanically combined. The two latter may be removed by mere distillation on the water-bath. They are easily separable by fuming nitric acid, the benzole being dissolved while the propyle is un­touched. The nitro-benzole obtained in this manner, on treatment by Béchamp’s process, yields aniline mixed with a little toluidine, but no bases belonging to any other class.

V. On some of the products of the destructive distillation of boghead coal.—Part II