Articles SCIENTIFIC ABSTRACTING By Gordon S. Fulcher See allHide authors and affiliations Science 30 Sep 1921:Vol. 54, Issue 1396, pp. 291-295DOI: 10.1126/science.54.1396.291 Gordon S. Fulcher Find 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.