194 A TREATISE ON* THE CONNECTION OF 



to be raised, the most judicious method of proceed- 

 ing would be still to conduct the water to the lowest 

 level, and which will be found to be Nearest to the sea,, 

 and then by a sufficient number of windmills, or other 

 engines, to lift it over the great sea bank. Some well 

 constructed fire engines would at certain times be of ma- 

 terial service to the drainage. 



Fire engines employed in the accomplishment of & 

 great and national object, should be exempted from duty 

 on the coal required to work them. The expence of 

 fuel might still farther be diminished, by making use of 

 the refuse small coal made at Newcastle in working the 

 larger and more valuable sorts. This refuse coal may 

 there be had at two shillings and three-pence per London 

 ehaldron of thirty-six Winchester bushels, and of which, 

 about 100,000 such chaldrons are annually brought 

 from the pits for the purpose of clearing the under- 

 ground workings, and are allowed to decay, and perish on- 

 bank. Were this quantity of refuse coal allowed to be 

 applied, duty free y to such like, or to other important 

 national, objects, many beneficial consequences would 

 thence arise ; the public revenue could not suffer by ex- 

 empting; 



