An Order-Memo Device for Delivery Routes
A milk driver who had many extra orders of milk and cream to deliver had considerable difficulty in keeping track of the orders. He overcame this difficulty by the use of a clip attached to the steering wheel of his truck. He got a spring clothespin, wired one side of it to one of the spokes of the steering wheel, and now places his extra orders in a ring attached to the clip, as they come on his route. When he makes a delivery, he moves the memo on the ring, bringing the next order before him. This method can be used in many other businesses, where articles such as newspapers are delivered on routes.—Francis W. Nunenmacher, Berkeley, California.
¶To counteract mildew on canvas, coat the parts with soap and rub well with powdered chalk or whiting.
Model Paddle-Wheel Boats
Fig. 1 Fig. 3
Fig. 2
The Rubber-Band Motor is Wound Up at the Crank, and Propels the Boat About 20 Feet
Only a few boys have ponds of their own, in a pasture, perhaps. But there are miniature lakes in our city parks, pools at our summer camps, and old water holes in the woods; if all of these fail, a boy can still sail his ships on the bathtub sea. A simple side-wheeler, built of wood, is shown in the sketch. It winds up with a crank and runs 15 to 20 ft. A float is made by pointing the ends of a thick board, the dimensions of which are given in [Fig. 1]. On this the paddle-wheel frame is nailed, as shown in the top view, Fig. 1, the side view, [Fig. 2], and the end view, [Fig. 3]. It is made of thin wood. A broom-handle section, just long enough to slip into this frame, is whittled to form a winding drum, and fitted with paddles, wire axles, and a crank. A second shorter section of the broom-handle, set between blocks nailed to the stern, serves as a roller for the rubber bands. These, linked together and tied to a length of heavy cord, as shown in Fig. 1, are fixed to the bow and run over the roller to the drum. The addition of a top, or lid, of cardboard, wood, or tin, and painted to resemble cabins and pilot house, and fitted with masts and a smokestack, completes the model. [Fig. 5] shows a similarly built stern-wheeler with the stern-wheel shaft set on brackets.—E. R. Smith, Walla Walla, Wash.
