Print this page Winslow Homer’s ‘For to Be a Farmer’s Boy’ depicts a worker in the field picking pumpkins as he gazes off into the distance, but after years of deterioration some of the red and yellow pigments have faded in the sky, leaving that area virtually without color. Now, Richard Van Duyne, a chemist at Northwestern University, along with Charles E. and Emma H. Morrison Professor of Chemistry in the Weinberg College of Arts and Sciences, and Francesca Casadio, a conservation sc