Drainage hy Steam Power. 163 



Longitudinal Section of Scoop Wheel, Sfc. 



a. The float-boards 4 ft. 8 in. long, 1 ft. 4 in. wide. 



b. The pinion on the crank-shaft. 



c. The wheel-race. Water shown 1 ft. 9 in. deep. 



d. The breast to which the water is lifted. 



e. Folding-doors, which are closed when the engine is not working, to prevent the water 



of the sluice flowing back into the wheel-race. 



Scale 1-1 2th of an inch to a foot. 



The boiler is one of 30-horse power. It is 26 feet long and 

 6 feet in diameter, with a flue through it of 2 feet 3 inches 

 diameter, and 2 feet 8 inches in the fire-place. It is estimated 

 that this boiler, with ordinary care, will last from fifteen to twenty 

 years. 



In answer to an inquiry which I made, from the manufacturers 

 of the engine, they state there would be no objection whatever to 

 making the wheel (and of course the wheel-race) 4 inches Avider. 

 Should this be done, I have no doubt the engine would be suffi- 

 cient for the drainage of 1600 or 1800 acres. 



For the information relative to the engine, Sec, I am indebted 

 to the makers, Messrs. Benjamin Hick and Son, of Bolton, who 

 have also favoured me with the drawing of the wheel. 



Comparative Levels. — The following scales exhibit the different 

 levels of the district, with reference to the Ordnance datum, and 

 to that from which the height of the tides are given : — 



M 2 



