17S 



raised, and carried along the ** back- 

 ** bone of England," in sufficient quan- 

 tity, not for irrigation only, but for every 

 other purpose to which water is appli- 

 cable. 



♦ 



If any other directions are wanting, to 

 give a clear conception of the art of 

 floating, I hope they will be found in 

 tlie following description of the plates, 



ADE- 



