News & Comment SCIENTIFIC NOTES AND NEWS Science 23 Jan 1920:Vol. 51, Issue 1308, pp. 84-85DOI: 10.1126/science.51.1308.84 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 51, Issue 130823 January 1920 Table of Contents Print Table of Contents Back Matter (PDF)