The author, after referring to the paper by Pfankuch, who obtained by the action of sulphide of potassium upon chloroform a crystalline substance which he held to be a compound of sulphide of potassium and sulphoform, and to the paper by Bouchardat on sulphoform, gives a detailed account of his own investigation.

The products formed when chloroform acts on an alcoholic solution of sulphide of potassium (prepared by dissolving caustic potash in alcohol, saturating one-half with sulphuretted hydrogen and then adding the other half) are sulphydrate of potassium and thioformiate of potassium (HCOSK, analogous in constitution to thiacetate). The action is probably as follows :— HCCI3 + 2K2S = 3KCI + HCSSK, and HCSSK + H2O = HCOSK + H2S, this sulphuretted hydrogen forming sulphydrate with the sulphide of potassium.