LettersDiscussion and Correspondence UNIFICATION OF SYMBOLS AND DIAGRAMS By Walter P. White See allHide authors and affiliations Science 30 Apr 1920:Vol. 51, Issue 1322, pp. 436-437DOI: 10.1126/science.51.1322.436 Walter P. White 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.