Using simple plans and photographs this booklet describes the construction and assembly of a metal-bending machine, whose main feature is the ability to form wheel rims from cold flat mild steel; this wheel can be used on farm carts and other basic equipment.

This windpump design was adapted from a series of low-lift windmills developed in Ethiopia. A very successful windpump which when scientifically tested pumped nearly twice as much water as the original design. Contains constructional details and plans.