LibraryInventions & DiscoveriesOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

HistoryOne small ahaInvention or discovery

This early photographic process, announced in 1839, produced images on silver-coated copper plates.

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Your new ahaDaguerreotype

A daguerreotype forms an image on a silvered metal plate. Source: Daguerreotype

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  2. 30This industrial laboratory's team of Bardeen, Brattain and Shockley developed the first transistor.RECALL
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  3. 31This Scottish inventor demonstrated an early working television system using mechanical scanning.RECALL
    John Logie Baird

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