Present status of sulfur fixation and plan of investigations / R.S. Dean -- Vapor pressure and thermodynamic properties of ammonium sulfites / Hillary W. St.Clair -- Recovery of sulfur in solid compounds by the addition of ammonia and water vapor to smelter gas / G.W. Marks and P.M. Ambrose -- Diethylene triamine and other amines as agents for the recovery of sulfur dioxide / Oxidation od ammonium sukfite solution / Frank S. Wartman