This is a preview of subscription content, access via your institution.
Rights and permissions
About this article
Cite this article
Communication De La Fondation „Pour La Science“ Centre International De Synthese (Paris). Synthese 6, 77 (1947). https://doi.org/10.1007/BF00414097
Issue Date:
DOI: https://doi.org/10.1007/BF00414097