Association Affairs SECTION A—MATHEMATICS AND ASTRONOMY See allHide authors and affiliations Science 09 Feb 1912:Vol. 35, Issue 893, pp. 220-221DOI: 10.1126/science.35.893.220 G. A. MillerFind 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 below.