Walter Frederick Morrison disc more cheaply. In 1955, he and Lu designed the Pluto Platter, the archetype of all modern flying discs. On January 23, 1957, they sold the rights for the Pluto Platter to the Wham-O toy company. Initially Wham-O continued to market the toy solely as the "Pluto Platter", but by June 1957 they also began using the name "Frisbee" after learning that college students in the Northeast were calling the Pluto Platter by that name. Morrison also invented several other products for Wham-O, but none were as successful as the Pluto Platter. Morrison and his wife, Lu Nay Morrison had
'50s progression for example, the ostinato bass line of Dieterich Buxtehude's setting of Psalm 42, "Quem admodum desiderat cervus", BuxWV 92: The opening of J. S. Bach's Cantata "Wachet Auf": The progression is found frequently in works by Mozart, such as his A minor Piano Sonata: The opening of his Piano Concerto 22, K482 extends the progression in a particularly subtle way, making use of suspensions: Eric Blom (1935, p.227) hears this passage as "the height of cunning contrivance resulting in what is apparently quite simple and obvious, but what could have occurred to nobody else." '50s progression The 50s progression is