LettersDiscussion and Correspondence A HISTORIC FOSSIL By G. R. Wieland See allHide authors and affiliations Science 22 May 1925:Vol. 61, Issue 1586, pp. 541DOI: 10.1126/science.61.1586.541 G. R. Wieland 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.