Donald Barr, who wrote Space Relations and Planet in Arms, died of heart failure on February 5. The Connecticut resident was in a hospital in Langhorne, Pennsylvania preparing for heart surgery.

Barr, age 82, was a life long educator, teaching in various departments and serving as an Assistant Dean at Columbia University before turning to private education where he was Headmaster at the Dalton and Hackley Schools in New York state. While at Columbia he wrote textbooks in science and mathematics.

He is survived by 4 sons and 8 grandchildren.