 He thought the country was losing its potassium and phosphorus, and he wanted to find a way to recycle them instead of throwing them in our sewage.In 1965 he and his wife traveled so he could speak at the fiftieth anniversary of the appointment of Agnes Fay Morgan to the faculty of the University of California, Berkeley.The following year, he was unable to attend the 100th anniversary of the University of Kansas in 1966 because of physical disability.