Design for a Machine, French, eighteenth century. The Metropolitan Museum of Art, Elisha Whittelsey Collection, Elisha Whittelsey Fund, 1962.
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Miscellany
One in four thousand people are said to suffer from photosensitive epilepsy, in which flashing computer screens can induce seizures. In 2008 the World Wide Web Consortium determined that online content should not flash more than three times in a one-second period. Federal government websites must design pages that avoid screen flickering within the range of 2 to 55 hertz.
I have always found it in mine own experience an easier matter to devise many and profitable inventions than to dispose of one of them to the good of the author himself.
—Hugh Plat, 1595
