News & Comment SCIENTIFIC NOTES AND NEWS Science 12 Nov 1920:Vol. 52, Issue 1350, pp. 461-463DOI: 10.1126/science.52.1350.461-a Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 52, Issue 135012 November 1920 Table of Contents Print Table of Contents Back Matter (PDF)