|Description||Sketch of a sugar mill with a double motion (two speed gear) Elevation, n.s. Pencil 1752.|
Inscribed: The intention of this seems to be to adapt it to different strengths of wind according as A works in D or as B works in E. (F) This is mentioned by Me Smeaton in his Short Account of inventions, 1756, Article 15th.
Windmills, Wakefield, Yorks, W.R.
The heck scrief [setting out angles of weather] Mr Roodhouse, Wakefield.
Diagram, n.s. Ink, n.d.