News & Comment SCIENTIFIC NOTES AND NEWS See allHide authors and affiliations Science 29 Oct 1926:Vol. 64, Issue 1661, pp. 421-425DOI: 10.1126/science.64.1661.421-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 64, Issue 166129 October 1926 Table of Contents Print Table of Contents Front Matter (PDF)
