Letters Letter to the Editor By Guy W. McKee See allHide authors and affiliations Science 12 Apr 1963:Vol. 140, Issue 3563, pp. 211DOI: 10.1126/science.140.3563.211-a Guy W. McKeeFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.