Replica of the first Morse telegraph, 1835
1934
Replica of Morse's first model of telegraphy apparatus of 1835, possibly made by the Deutsches Museum, Munich, Germany, 1934
Replica of Morse's second model of telegraphy apparatus, 1934
1934
Replica of Morse's second model of telegraphy apparatus, probably made by the Deutsche Museum, Munich, Germany, 1934. Copy of an original on display in the Deutsche museum, dating from 1846
Photo print
1924
Photo print, 8 1/2" x 6 1/2", of Selling's calculating machine, 1905
Photo print
1924
Photo print, 8 1/2" x 6 1/2", of Prof. Selling's calculating machine, 1886