sentences:  ""Beiträge zur Kenntnis der Reaktionsgeschwindigkeit in Lösungen"" 
  
  Wagner was interested in the measurement of thermodynamic activities of the components in solid and liquid alloys.He also carried out research on problems of solid state chemistry, especially the role of defects of ionic crystals on thermodynamic properties, electrical conductivity and diffusion.He became a research fellow at the Bodernstein Institute at the University of Berlin.