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The Wagner tuba is a narrow-bore tuba with a French-horn mouthpiece. Tubas appeared first in Berlin in the 1820s, soon after the invention of the valve. They were soon accepted into the band and orchestra, displacing the serpent, ophicleide, and other such instruments of poorer tone quality and intonation.
The world's first flat-bottomed air boat was invented near Brigham City, Utah in 1943 by Cecil Williams, Leo Young, and G. Hortin Jensen. The purpose of the boat was to help preserve and protect bird populations and animal life work at the world largest migratory game bird refuge.