LettersDiscussion and Correspondence FILING REPRINTS By Erwin F. Smith See allHide authors and affiliations Science 16 Nov 1923:Vol. 58, Issue 1507, pp. 396-397DOI: 10.1126/science.58.1507.396-a Erwin F. SmithFind 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.