LettersDiscussion and Correspondence THE EFFECTS OF RAPID AND PROLONGED DEEP BREATHING By D. F. Comstock See allHide authors and affiliations Science 03 Dec 1909:Vol. 30, Issue 779, pp. 804-805DOI: 10.1126/science.30.779.804 D. F. Comstock 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.