NaturwissenschaftenSeptember 1921, Volume 9, Issue 39, pp 776–779 | Cite asBesprechungenAuthorsAuthors and affiliationsP. P. EwaldHans ThirringE. OrlichHartmut KallmannM. SchlickArticleThis 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 1921Authors and AffiliationsP. P. Ewald1Hans Thirring2E. Orlich3Hartmut Kallmann3M. Schlick41.Stuttgart2.Wien3.Berlin-Charlottenburg4.Rostock