Discovery of Neptune (planet) by FranceastronomerUrbain Le Verrier and United KingdomastronomerJohn Couch Adams; verified by GermanyastronomerJohann Gottfried Galle.,
First commercial production of chewing gum by John Curtis on a stove at his home in Bangor, Maine in the United States and marketed as 'The State of Maine Pure Spruce Gum'.,