He was named the William Leffingwell Professor of Painting in 1979 and served as chairman of the Art Department .
Chaet began teaching in the Yale University Art Department in 1951 and could continue to do so until his retirement in 1990 .
Chaet was named the William Leffingwell Professor of Painting in 1979 and served as chairman of the Yale University Art Department   .
Chaet began teaching in the Yale University Art Department in 1951 and could continue to do so until his retirement in 1990 .