James Jay invents an invisible ink that aids George Washington - November 29th, 1775

James Jay invents an invisible ink that aids George Washington - November 29th, 1775

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Episode
1234 of 2007
Længde
8M
Sprog
Engelsk
Format
Kategori
Historie

On this day in 1775, physician and amateur chemist James Jay invented a new kind of invisible ink, which was later put to use in the American War of Independence.

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