News & Comment SCIENTIFIC NOTES AND NEWS See allHide authors and affiliations Science 28 Jan 1938:Vol. 87, Issue 2248, pp. 81-85DOI: 10.1126/science.87.2248.81-b Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 87, Issue 224828 January 1938 Table of Contents Print Table of Contents Back Matter (PDF)
