Before revision: Since 1921, the teams of Otto Stern in University of Hamburg and University of Frankfurt am Main , improved and pioneered the to rush publication of his work with Walther Gerlach on what later became known as the Stern–Gerlach experiment.
After revision: In 1921, Hartmut Kallmann and Fritz Reiche wrote" about the deflection of beams of polar molecules in an inhomogeneous electric field, with an ultimate aim of measuring their dipole moments.Seeing the page proofs for the Kallman and Reiche work prompted Otto Stern at the University of Hamburg and University of Frankfurt am Main to rush publication of his work with Walther Gerlach on what later became known as the Stern–Gerlach experiment.