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A software rendering of a spinning barber pole Barber pole, c. 1938, North Carolina Museum of History Barber shop in Torquay, Devon, England, with red and white pole. A barber's pole is a type of sign used by barbers to signify the place or shop where they perform their craft.
The barber's pole is commonly found outside barber shops. In 1929, psychologist J.P. Guilford informally noted a paradox in the perceived motion of stripes on a rotating barber pole . The barber pole turns in place on its vertical axis, but the stripes appear to move upwards rather than turning with the pole. [ 3 ]
A red, white and blue striped pole. The barber pole, featuring blue, red and white spiraling stripes, symbolizes different aspects of the craft. It is a symbol from the time when barbers used to perform medical procedures. The white and red stripes represent bandages and blood while the blue stripes represent veins.
William C. Goodridge was born in 1806 in Baltimore, Maryland.The son of a Black American woman and a white man, Goodridge was a slave at birth. His grandmother was owned by Charles Carroll of Carrollton, a delegate to the Continental Congress in York, and a signer of the Declaration of Independence.
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Later the "Society for the Preservation and Encouragement of Barber Shop Quartet Singing in America" was established, known by the abbreviation S.P.E.B.S.Q.S.A. [23] at a time when many institutions in the US used multiple initials to denote their function. The group adopted the alternate name "Barbershop Harmony Society" early in its history.
The second barber surgeon documented was Henrik Bardskärare, who worked in the castle of Vyborg in Finland (currently a part of Russia). Each company of 400–500 men in the Swedish Army was assigned a barber during the rule of King Gustav I Vasa in the 16th century. A barber surgeon was available to tend to the injured in almost every division.
The theory behind the illusion was demonstrated during an episode of the BBC's show Bang Goes the Theory, where the effect was described as "a musical barber's pole". [ 2 ] The scale as described, with discrete steps between each tone, is known as the discrete Shepard scale .