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
Knowing and the Known with animals and plants, as well as objects of all types, in any environment. Men and women have, are, and will present their acts of knowing and known in language. Generic people, and specific men and women, are known to be vulnerable to error. Consequently, all knowledge (knowing and known) whether commonsensical or scientific; past, present, or future; is subject to further inquiry, examination, review, and revision. Knowing and the Known Knowing and the Known is a 1949 book by John Dewey and Arthur Bentley. As well as a Preface, an Introduction and an Index, the book consists of 12