News & CommentScientific Events THE INSTITUTE OF TECHNOLOGY OF NORTHWESTERN UNIVERSITY Science 01 Aug 1941:Vol. 94, Issue 2431, pp. 108DOI: 10.1126/science.94.2431.108 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 94, Issue 243101 August 1941 Table of Contents Print Table of Contents Back Matter (PDF) Front Matter (PDF)