Letters Department of Science By ROBERT LOBSTEIN See allHide authors and affiliations Science 25 Apr 1958:Vol. 127, Issue 3304, pp. 1002-1003DOI: 10.1126/science.127.3304.1002-a ROBERT LOBSTEINFind 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.