URL：https://www.gannett-cdn.com/presto/2019/05/21/PCIN/972b18b9-a694-4a29-961a-06ecfefc9733-telegraph.jpg?crop=450,250,x0,y0&width=3200&height=1680&fit=bounds
掲載元：https://www.cincinnati.com/story/news/2019/05/24/today-history-may-24-1844-samuel-morse-transmitted-first-message-telegraph-line/3746291002/
