6-523: (Redirected from Devils Fork ) Devil's Fork , Devils Fork and Devil Fork can refer to: The blivet , also known as the Devil's tuning fork, an optical illusion Devils Fork State Park , a 622-acre (2.52 km) park in Northwestern South Carolina Bidens frondosa , an herb native to North America The Devils Fork, a tributary of
12-445: Is different from Wikidata All article disambiguation pages All disambiguation pages Blivet An impossible trident , also known as an impossible fork , blivet , poiuyt , or devil's tuning fork , is a drawing of an impossible object (undecipherable figure), a kind of an optical illusion . It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at
18-663: The Little Red River in Arkansas Devil Fork, Kentucky Devils Fork, West Virginia Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Devil's Fork . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Devil%27s_Fork&oldid=550775550 " Category : Disambiguation pages Hidden categories: Short description
24-535: The Finagle & Diddle Engineering Works" (although something else called a "hole location gauge" had already been patented in 1961 ). The term "blivet" for the impossible fork was popularized by Worm Runner's Digest magazine. In 1967 Harold Baldwin published there an article, "Building better blivets", in which he described the rules for the construction of drawings based on the impossible fork. In December 1968 American optical designer and artist Roger Hayward wrote
30-480: The four-eyed Alfred E. Neuman balancing the impossible fork on his finger with caption "Introducing 'The Mad Poiuyt' " (the last six letters on the top row of QWERTY typewriters, right to left). An anonymously contributed version described as a "hole location gauge" was printed in the June 1964 issue of Analog Science Fiction and Fact , with the comment that "this outrageous piece of draftsmanship evidently escaped from
36-470: The other end. In 1964, D.H. Schuster reported that he noticed an ambiguous figure of a new kind in the advertising section of an aviation journal. He dubbed it a "three-stick clevis ". He described the novelty as follows: "Unlike other ambiguous drawings, an actual shift in visual fixation is involved in its perception and resolution." The word "poiuyt" appeared on the March 1965 cover of Mad magazine bearing
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