From Robert Mallett MRIA, MSCEI “On certain improved Methods of constructing Valves or Sluices, as applied to Canal and Dock Gates, &c, and similar Works of Hydraulic Engineering” in The Architectural Magazine 1837.
A target for WI to aim for?
From Robert Mallett MRIA, MSCEI “On certain improved Methods of constructing Valves or Sluices, as applied to Canal and Dock Gates, &c, and similar Works of Hydraulic Engineering” in The Architectural Magazine 1837.
A target for WI to aim for?

