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Contemporary photograph - Public Domain
unknown - Public Domain
after Cornelis Janssens van Ceulen - Public Domain
United States Historical Office? - Public Domain
Unattributed - Public Domain
Smithsonian Institution -
Unknown - Public Domain
Utilizer - CC BY-SA 4.0
author - Public Domain
Bain News Service, publisher - Public Domain
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Contemporary photograph - Public Domain
Gore, Charles, 1853-1932
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unknown - Public Domain
Maginnis, Charles Donagh, 1867-1955
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unknown - Public Domain
Williams, Ernest S. (Ernest Samuel), 1881-1947
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after Cornelis Janssens van Ceulen - Public Domain
Digges, Dudley, Sir, 1583-1639
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United States Historical Office? - Public Domain
Works, John D. (John Downey), 1847-1928
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Unattributed - Public Domain
Eastwood, Alice, 1859-1953
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unknown - Public Domain
Lacy, Thomas Hailes, 1809-1873
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Smithsonian Institution -
Marconi, Guglielmo, marchese, 1874-1937
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unknown - Public Domain
Johnson, John Telemachus, 1788-1856
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Nasmyth, James, 1808-1890
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Niemann, Albert, 1831-1917
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Schaechter, Mordkhe, 1927-2007
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Landini, Francesco, approximately 1325-1397
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Unknown - Public Domain
O'connell, Denis Joseph, 1849-1927
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unknown - Public Domain
Scheidmantel, Karl, 1859-1923
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Utilizer - CC BY-SA 4.0
Manning, Barbara (Musician)
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Bellosio, Carlo, 1801-1849.
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Vico, Enea, 1523-1567
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Huntington, F. D. (Frederic Dan), 1819-1904
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Brown, Ray, 1926-2002
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Wolf, Ernst Wilhelm, 1735-1792
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Banchs, Enrique, 1888-1968
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Eccles, David Eccles, Viscount, 1904-
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unknown - Public Domain
Guthe, Karl Eugen, 1866-1915
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author - Public Domain
Crosby, Fanny, 1820-1915
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Bain News Service, publisher - Public Domain
Sylva, Marguerite, 1875-1957
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Costello, Dolores, 1905-1979
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Chaliapin, Fyodor Ivanovich, 1873-1938
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Dyer, Henry, 1848-1918
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Rainborow, Thomas, -1648