News & Comment SCIENTIFIC NOTES AND NEWS + See all authors and affiliations Science 03 Dec 1937:Vol. 86, Issue 2240, pp. 516-518DOI: 10.1126/science.86.2240.516 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 86, Issue 224003 December 1937 Table of Contents Print Table of Contents Back Matter (PDF) Front Matter (PDF)
