Abstracts THE AMERICAN CHEMICAL SOCIETY By Graham Edgar See allHide authors and affiliations Science 19 Oct 1923:Vol. 58, Issue 1503, pp. 309-316DOI: 10.1126/science.58.1503.309 Graham Edgar 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.