News & Comment SCIENTIFIC NOTES AND NEWS See allHide authors and affiliations Science 15 Jul 1932:Vol. 76, Issue 1959, pp. 50-53DOI: 10.1126/science.76.1959.50-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 76, Issue 195915 July 1932 Table of Contents Print Table of Contents Back Matter (PDF) Front Matter (PDF)
