!64 D R I N K I N G P O O L S. 7. 



made-earth requifite to be ralfcd, the excava- 

 tion ought to be formed twelve months be- 

 fore the claying be done. 



7. ExPENCE. Although it is now twenty 

 years fmce the difcovery was made, the art is 

 flill partially hid under the veil of myfcery ; 

 and is not yet become familiar to comm.on 

 farm labours. In this neighbourhood ponds 

 flill continue to be made by men from the 

 Wolds i all of them, in reality or pretence, 

 pupils of the firil inventors. 



Thefe men generally work by the grofs ; 

 the ;^rice being in proportion to the diame- 

 ter ; but thev feem to have no reo;ular me- 



■J o 



thod of calculation. 



Ten pounds were given, and may now be. 

 coniidered as a medium price for twenty 

 jards diameter * ; forming, claying, cover- 

 ing, and in general digging the clay, inclu'.I- 

 cd : all carriage and extra labour being, 

 done by the employer. 



A circle twenty yards in diameter contains 

 in its area 314 fquare yards. Therefore, 



each 



* In the early days of fhc art, and when uvo coats 

 of chiy.ivcrc iilVu, twenty jrpuuds wc e given for ponds 

 ef this dimenfiou. 



