How to construct a cheap wind machine for pumping water. Instructions for building a Savonius Rotor for water pumping. - - Quebec : Brace Research Institute,McDonald College of McHill University, 1973 - 16 p. ; ill. - - Do-it-youself leaflet;no.l-5 .


Waterworks-Technological innovations.
Wind power.
Waterwheels.

TJ917 / M3