The First ever liquid filled compass The US Naval Observatory put out a call for American Manufactured navigational instruments and called on Ritchie for help. June 1861, Ritchie completed and sent samples of his work – including the first ever liquid filled compass. neptuneweb2017-12-06T09:53:52-05:00December 6th, 2017| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail