tamanのモールス練習動画18（モールス信号 速度22WPM スペース標準) Learn Morse Code

On April 27, 1791, Samuel Morse was born. Morse developed in the 1830s what became known as Morse Code, the primary language used in the transmission of messages using an electric telegraph machine. The telegraph, using Morse Code, is intimately tied to the development of Sacramento starting in the 1850s. In 1854, the Alta Telegraph Company built a telegraph line between Sacramento and Nevada City. Other lines started to connect Sacramento to other cities in California. On October 24, 1861, the