Porcelain Phrenological Head, British, 1801-1900
1801-1900
Duchenne's Late C19 Magneto Electric Therapy Machine
1860-1900
Gecophone broadcast receiver, model B.C 3200, 1924
1924
Experimental carbon pencil microphone, 1878-1890
1878-1890
Selector switch, 1903
1903
Magneto-ringing Ericsson telephone, 1892-1920
1892-1920
Powdered graphite microphone, 1878-1890
1878-1890
Impulse sender (dial), 1915
1915
Mechanical telephone, 1880-1920
1880-1920
Loading coil, 1910-1930
1910-1930
Crossley table telephone, 1879
1879
Volume 1 No. 1 of "Television" monthly magazine, 1928
1928
Five-line single cord switchboard, 1900-1909
1900-1909
Wall telephone, 1880-1920
1880-1920
Demonstration radio receiver
1926
Experimental microphone, 1878-1890
1878-1890
A T & T national telephone directory, October 1896
1896
Experimental carbon block microphone, 1878-1890
1878-1890
Strowger automatic telephone, 1901-1910
1901-1910
Silicon crystal for wireless telegraphy, mounted in a locket, 1906-1916
1906-1916
Table instrument with dial, 1903
1903
Experimental microphones with carbon pencils and cups, 1878-1890
1878-1890
National Telephone Company directory, 1898-1899
1898-1899
Granular microphone in glass tube, 1878-1890
1878-1890
Strowger calling dial, 1906
1906
Gutta percha snuff box, 1820-1860
1820-1860
Filings coherer, glass tube with side pocket mounted on cylindrical rod with brass screw terminals at ends, 1894-1904
1894-1904
Coherer with coarse brass turnings, 1894
1894
Stock Exchange automatic telegraph, 1872-1880
1872-1880
Syntonic Leyden jars, 1880-1889
1880-1889
Bright's bell telegraph, 1855
1855
Sample of four-core telegraph cable connecting Vancouver Island with the mainland
1904
Marconi coherer and Admiralty pattern decoherer, 1900-1910
1900-1910
Specimen of telegraph cable laid in Birmingham in 1856
1856
Filings coherer, glass tube containing powdered copper, bulb at one end, 1894-1904
1894-1904
Wheatstone receiver (Morse inker), 1867
1867
Filings coherer, Lodge pattern with two wires inserted into bulb at one end, 1894-1904
1894-1904
Henley's magneto electric double needle telegraph, 1848-1852
1848-1852
Single-needle telegraph by W. F. Cooke, 1840-1860
1840-1860
Specimens of Pacific cable in glazed presentation case, 1902-1923
1902-1923
Hand perforator and copy stand for Wheatstone automatic telegraph system, 1890-1910
1890-1910
Vulcanite telephone wire insulators, 1850-1870
1850-1870
Wheatstone's portable ABC telegraph, 1858
1858
'Leiber's Five Letter American Telegraph Code', book issued 1915
1915
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
Morse key with send-receive switch, 1900-1920
1900-1920
Henley needle galvanometer, 1855-1860
1855-1860
Experimental model of Marconi's magnetic detector, 1900-1910
1900-1910
Filings coherer, Lodge pattern, 1895-1900
1895-1900
Morse tape on which signals were recorded by means of a coherer, 1900
1900