174 



Index. 



Scoop wheels, inlet and outlet 

 courses, 'jj 



shuttle for, 80 



movable breasts, 78 



quantity of water raised 



by, 82 



- speed of, 83 



~ work done by, 84 



- efficiency of, 85, 115 



- clearance, 74 



~ discharge of, 84 

 description of, at Pode- 



and 



hole, 106 



Littleport 



Downham district, 112 

 Ten Mile station, 



117 



well, 124 



Hundred Foot, 113 

 Upwell and Out- 

 Burnt Fen, 119 

 Prickwillow, 121 

 Hatfield Chace, 



130 



Katwijk, 148 



Halfweg, 147 



Zuidplas, 150 



Waterland, 152 



Atfeh, 155 



Scour, removal of deposit by, 18 

 Screw pumps, 88 

 Shuttle for scoop wheels, %o 

 Sluices, size of, 26, 167 



doors, 27 



' for lateral drains, 28 



foundations of, 29 



at Ferraby, 30 



position ofj 31 



level of sill, 31 



capacity for discharge, 32 



formula for calculating dis- 

 charge, 33, 163 

 proportion of depth to width, 



33 



Stoney^s improved method of 



hanging doors, 28 

 — examples of, 30, 34 



Sluices, table showing dimensions 

 and capacity, 167 



quantity discharged 



by tidal, 163 



time closed by tide, 



164 

 Soc, 36 

 South Level, drainage of, 5 



cost of pumping in, 68 



Spalding, trials of portable engines 



at, 61 

 Speed of scoop wheels, %'^ 

 Start posts, 73 

 Steam engines for drainage, 58 



power, drainage by, 50 



compared with gravita- 

 tion, 6 



first applied to drainage, 57 



Sterk, Elink, trials of pumping 



machinery, 147, 149 

 Stoney, improvement in sluice 



doors, 28 

 Stour, river, deepening by scour, 21 

 Sturton-on-Trent scoop wheel, ^'j 

 Suspension, material carried in by 



water, 19 

 Syphons used at Middle Level 



drain, 34 



T. 

 Tees, river, 19 



Temperature of drained land, 38 

 Ten Mile pumping station, X17 

 Thompson, on centrifugal pumps, 



102, 105 

 Tidal outfalls, 9 

 Tide, tables showing time sluices 



closed by, 164 



height of, 165 



Training outfalls by fascines, 31 

 Transporting power of water, 18 

 Trials of engine drivers, 61 



U. 



Unwin, centrifugal pumps, 102, 105 

 Upwell, Outwell, &c., wheel, 124 



