LIST OF ILLUSTRATIONS. 



PI A,TE 



Sea Sluice for Drain, width 8 feet opening .. i 



Ditto, with three openings 2 



Diagram showing Angles of Ingress and Egress of Scoops .. .. 2 



Centrifugal Pump and Engine at Messingham 2 



Scoop Wheel, Plan and Section .. .. , ., ., .. 3 



Archimedean Pump .. .. ,. .. 3 



Sections showing Blades of Pumps t 4 



Centrifugal Pump and Engine at Grootslag Polder 4 



Ditto, Legmeer Polder .. .. 4 



Scoop Wheel at Podehole ,. • 5 



Centrifugal Pumps at Lade Bank .. .. ,, 5 



Diagram of Engine at 100 foot 6 



Whittlesea Mere Pump Station 6 



Section of Pump at Burnt Fen , 6 



Scoop Wheel at Nordelph 6 



Plan and Elevation of Pumping Station at Ferrara .. 7 



Pump at Minden in Holland 7 



Plan and Sectional Elevation of Pumps at Lake Haarlem 8 



