NaturwissenschaftenDecember 1923, Volume 11, Issue 50, pp 975–981 | Cite asBesprechungenAuthorsAuthors and affiliationsMax HartmannHans NachtsheimKurt LewinF. PinkusW. LandauerErnst RüdinArticle 23 Downloads This is a preview of subscription content, log in to check access.PreviewUnable to display preview. Download preview PDF.Unable to display preview. Download preview PDF.Copyright information© Verlag von Julius Springer 1923Authors and AffiliationsMax Hartmann1Hans Nachtsheim1Kurt Lewin2F. Pinkus2W. Landauer3Ernst Rüdin41.Berlin-Dahlem2.Berlin3.Heidelberg4.München