Articles TWENTY YEARS See allHide authors and affiliations Science 13 Dec 1889:Vol. ns-14, Issue 358, pp. 398-400DOI: 10.1126/science.ns-14.358.398 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol ns-14, Issue 35813 December 1889 Table of Contents Print Table of Contents Front Matter (PDF)
