Media type: E-Article Title: Spring Meeting of the New England Section of the American Physical Society Contributor: Allen, Mildred imprint: American Association of Physics Teachers (AAPT), 1943 Published in: American Journal of Physics Language: English DOI: 10.1119/1.1990471 ISSN: 0002-9505; 1943-2909 Keywords: General Physics and Astronomy Origination: Footnote: