Donald F. Arnold, State University of New York at Albany faculty member in the School of Business, writing on a blackboard during a class. There are crop marks on all sides of the original. Written in the top margin is "Photo P P.22 73% of original." Written in the left margin between two arrows is "reduce to 24 pi." Written in the bottom margin between two arrows is "Reduce to 19 pi."
Donald F. Arnold, State University of New York at Albany faculty member in the School of Business, writing on a blackboard during a class. There are crop marks on all sides of the original. Written between two arrows in the top margin is "reduce to 29 pi" and in the left margin between two arrows is "reduce to 24 pi." Written in the bottom margin is "Photo M P.10 73% of original."