LettersDiscussion and Correspondence THE PROBLEM OF THE BOY IN THE SWING By Henry Crew See allHide authors and affiliations Science 08 Aug 1919:Vol. 50, Issue 1284, pp. 139-140DOI: 10.1126/science.50.1284.139 Henry Crew 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.