On May 24, 1844, the line was officially opened as Morse sent the famous words " What hath God wrought " from the Supreme Court chamber in the basement of the U. S. Capitol building in Washington, D. C., to the B & O's Mount Clare Station in Baltimore.

On May 24, 1844, the line was officially opened as Samuel F. B. Morse sent his famous words " What hath God wrought " from the B & O's Mount Clare station to the Capitol Building along the wire.

0.007 seconds.