News & Comment SCIENTIFIC NOTES AND NEWS Science 06 Feb 1920:Vol. 51, Issue 1310, pp. 136-139DOI: 10.1126/science.51.1310.136-b 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 131006 February 1920 Table of Contents Print Table of Contents Back Matter (PDF)