No, the television was developed and introduced to the commercial market in the 1940s and 1950s, about halfway into the twentieth century.
telephone
telegraph
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No. Television was invented by Manfred von Ardenne, a German scientist, in 1930. So it was invented in the 20th century.
Modern set theory was developed by Georg Cantor and Richard Dedekind in the late nineteenth century.
Not all introduced animals to Australia came in the 1800s, but those that did arrive in the nineteenth century include:camelsfoxesrabbitsdeercane toadswater buffaloEuropean carp
The nineteenth century was from 1800 - 1899.
Modern set theory was developed by Georg Cantor and Richard Dedekind in the late nineteenth century.
Nineteenth-Century Literature was created in 1945.
The Nineteenth Century - periodical - was created in 1877.
The Nineteenth Century - periodical - ended in 1972.