Letters Points on lightning-rods See allHide authors and affiliations Science 12 Sep 1884:Vol. ns-4, Issue 84, pp. 223DOI: 10.1126/science.ns-4.84.223-a A. B. PORTERFind 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.