Alexander Graham Bell demonstrated several experimental telephones at the Philadelphia Centennial Exposition in 1876. This unit features a single electro-magnet and could be used both as transmitter and receiver. Bell approached the problem of…
Includes inset continuation map of Richmond and lists of manufacturing lines in New York City and the 5 boroughs.
1 map : col., mounted on linen 88 x 90 cm.
Print shows the 10-story building that is considered the world's first skyscraper. Designed by architect William LeBaron Jenney, it stood in Chicago 1885 - 1931. The print is in an original custom frame.