Inventions

thumb|right|alt=Cover of Science and Invention Magazine|'BUILD YOUR OWN TELEVISION RECEIVER.' Electrical Experimenter|Science and Invention magazine cover, November 1928

thumb|Portrait of Horace Walpole by [[Joshua Reynolds, 1756]]Serendipity is an unplanned fortunate discovery. The term was coined by Horace Walpole in 1754.

Wikimedia list article

Hypnoscope is an instrument intended to determine a person's susceptibility to hypnotic influences. thumb|Hypnoscope

International exposition

invention or innovation that can be applied to drive radical change in the capabilities of a user or culture, characterized by rapid development of subsequent derivative technologies, often in diverse fields

U.S. National Historic Landmark research laboratory