Warning hx to flip proper time to j out walnut trees I ^ sounded In a let* | ter to the American Forestry Assort a | tlon from Dr. Robert T. Morris, an authority of New York city. The black walnut Is destined to play a big part In the war and President Wilson has called upon the Roy Scouts to mark the trees. “From September to April is the time to cat these trees, say? Doctor Morris, in his letter to the association. “If the {pee* ore cut at other times the root# will die. It Is very important to Obcm this rale to safeguard oar fatart timber sap-si*.”