Science News SCIENCE NEWS See allHide authors and affiliations Science 05 Aug 1938:Vol. 88, Issue 2275, pp. 8-11DOI: 10.1126/science.88.2275.8 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 88, Issue 227505 August 1938 Table of Contents Print Table of Contents Back Matter (PDF) Front Matter (PDF)
