News & Comment NEWS and Notes + See all authors and affiliations Science 20 Feb 1948:Vol. 107, Issue 2773, pp. 184-190DOI: 10.1126/science.107.2773.184 Article Info & Metrics eLetters PDF This article has a correction. Please see:Correction - April 02, 1948 This is a PDF-only article. The first page of the PDF of this article appears below.