The other kind of stringed instrument
In the 1890s, American mathematicians embraced the ideals of German mathematicians and scientists. They studied in Germany and purchased equipment by German makers. This string model, made by the German firm of Ludwig Brill, was exhibited at the Columbian Exposition in Chicago in 1893. In one position of the black metal frame, red strings form a double cone, gold strings a cylinder, and blue strings a plane. When the circle at the top is twisted, the cone and the cylinder become hyperboloids of one sheet and the plane deforms into a hyperbolic paraboloid.
||Purchased at Exposition by Wesleyan University in Connecticut
||Web display only
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