Brass model, scale 1:8, of the conoidal three-bladed propeller patented and made by George Rennie, Greenwich, Kent, England, 1839. This type of this type of screw propeller was fitted to the iron ...

Self-taught pioneer of screw propeller technology, the enigmatic, gifted and unfortunate Henrietta Vansittart is today recognised as one of the first women to work as an engineer. Henrietta Vansittart ...

and that his propeller is not in use in England at all. The first inventor of the screw propeller in America, was Col. John Stevens, of Hoboken, the father of Ro-beitL. Stevens, of thiscity.