Astronomische NachrichtenVolume 90, Issue 18 p. 273-275 Article Letter to the Hon. R. W. Thompson, Secretary of the Navy John Rodgers, John Rodgers Rear Admiral and SuperintendentSearch for more papers by this author John Rodgers, John Rodgers Rear Admiral and SuperintendentSearch for more papers by this author First published: 1877 https://doi.org/10.1002/asna.18770901802AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume90, Issue181877Pages 273-275 RelatedInformation