Desiring to propel my hand sled with power transmitted by cranks and wheels, I set about to procure the necessary materials. Two medium-sized buggy wheels were found in the back yard of a blacksmith shop, which were procured for a nominal price. The fellies of these wheels were removed, the tenons cut from the spokes and nails substituted, which were driven in their ends so that about 1/2 in. of the body with the head projected. The heads were then removed and the nail ends sharpened.

The hubs were plugged with pieces of wood, whittled to tightly fit the holes. A hole was then bored exactly central through each plug for a V^-in. rod. This size rod was procured and bent to form a crank, the bearing end being threaded for a distance equal to the length of the hub.

Two pieces or blocks of wood, 2 in. square and 4 in. long, were used as bearings. These were bored centrally through the long way, to receive the 1/2 -in. rod just loose enough to make a good bearing. These bearings were supported by a pair of braces made of strap iron, about 1/4 in. thick and % in. wide. The length of the iron will depend on the size of the wheels and the height of the sled runner. The braces were shaped as shown. The center of the bearing hole must be' as high from the surface of the ground as the distance the spoke ends are from the center of the hub hole.

The crank is then run through the bearing hole and a nut run on the threads and a washer placed against the nut. The wheel is then slipped on the axle, and another washer and nut run on tightly. Both wheels, bearings, cranks, and brackets are made alike. The brackets are fastened with small bolts to the sled top. - Contributed by Justin Stewart, Wallingford, Conn.

Propellers for a Hand Sled 801

Buggy Wheel Sled Propelled by Revolving Wheels Turned by Cranks, the Pointed Nails Doing the Pushing