C 69 ] 



the pond to lofe its water. After the gravel is laid, 

 in, nothing more is neceflary. 



A piece of ground iTiould be chofcn for this pur- 

 pofe, to which there is a defcent fronn all fides, if it 

 can be found in a proper fituation. 



Winter, or early in the fpring, is the bed fcafon 

 for making thefe ponds or refervoirs* 



Lay each material of equal thicknefs from th< 

 centre to the edges of the pond. 



If lime can be made Bnt enough without the ufe 

 of water, fo much the better : if not, ufe as little 

 water as poflible. The clay fhould have no more 

 water than will ferve to make it work kindly. 



In this manner ponds may be made of any fize^ 

 the diameter and depth being kept nearly in tht 

 fame proportion as above-diredted. 



After I left Bath the lad fummer, and before the 

 end of the long drought, I faw in a field one of 

 thefe ponds nearly two-thirds full of water, although 

 many catde, fheep, and horfes, had grazed ther^ 

 lince the beginning of May. 



I am> &€• 



Jan. 27, 1779, 



Vol. I. F Ajlticlk 



