overall: 3 in x 2 in x 6 3/4 in; 7.62 cm x 5.08 cm x 17.145 cm
United States: New Jersey, Morristown
United States: Maryland, Baltimore
United States: District of Columbia, Washington
Alfred Vail made this key, believed to be from the first Baltimore-Washington telegraph line, as an improvement on Samuel Morse's original transmitter. Vail helped Morse develop a practical system for sending and receiving coded electrical signals over a wire, which was successfully demonstrated in 1844.
Morse's telegraph marked the arrival of instant long-distance communication in America. The revolutionary technology excited the public imagination, inspiring predictions that the telegraph would bring about economic prosperity, national unity, and even world peace.
Kendrick, Kathleen M. and Peter C. Liebhold. Smithsonian Treasures of American History
Negative log book number 3, or "green book," documenting various Smithsonian museums and events. Information includes negative numbers, subjects of the photographs, persons and departments for whom the pictures were taken, dates the pictures were taken, photographers, and dates the information was entered into the log books.
Smithsonian Institution Archives, Accession 10-001, Negative Log Book Number 3, 1972