国立アメリカ歴史博物館さんのインスタグラム写真 - (国立アメリカ歴史博物館Instagram)「On May 24, 1844, Samuel F. B. Morse transmitted the famous telegraph message—"What hath God wrought?"—over an experimental 40-mile telegraph line running from Washington, D.C. to Baltimore. The message marked the arrival of instant long-distance communication in the United States. This telegraph key is believed to be from the Baltimore-Washington telegraph line, used a few months after the May demonstration. Although Samuel Morse is credited as the inventor of the telegraph, his breakthrough depended on the research and support of others, including Joseph Henry—later first secretary of the @smithsonian—as well as Morse's partner, Alfred Vail. A talented machinist (a builder and operator of machines) Vail refined Morse's prototype design in order to build this telegraph key. He also helped Morse develop a practical system for sending and receiving coded electrical signals over a wire—Morse code. On May 24, 1844, Vail was the operator in Baltimore who received Morse's inaugural transmission. Unfamiliar with telegraph tech? Telegraph keys like the one above are electrical on-off switches used to send messages in Morse code. The message travels as a series of electrical pulses through a wire. The operator pushes the key’s lever down briefly to make a short signal—a dot—or holds the lever down for a moment to make a slightly longer signal—a dash. The sequence of dots and dashes represent letters and numbers. Starting today, you can explore this object from our collection from your home in a whole new way. The Morse-Vail telegraph key is one of ten open access objects from across the Smithsonian that have been transformed into #3D AR objects you can embed and explore right here on Instagram. Check out our Instagram story today to learn more—and see if you can spot Vail's signature on the key! Or try adding the 3D AR model to your own Story by tapping the smiley face (😃) at the top of our profile. #SmithsonianOpenAccess #Smithsonian3D #OpenAccess #ARtifactsAnywhere #SparkAR #AmericanHistory #History #TechnologyHistory #TechHistory #Telegraph」12月10日 2時24分