Book 3 — Device Frightens Flies at Screen Door

The Scalloped Roller is Revolved Rapidly When the Door is Opened, Frightening Flies

An effective means of frightening flies away from a screen door may be made from a spring curtain rod and cotton duck. Scallops of 8-oz. duck, 6 in. long, are fastened to the pole, on opposite sides, as shown. The ratchet on the end of the pole is arranged so as not to catch. A small cord is wound around the pole and fastened to the screen door. The rod supports are fixed near the top of the door frame.—Josef H. Noyes, Paris, Tex.