IX. — On reducing the Cost of permanent Drainage. By Josiaii 
Parkes, Consulting Engineer to the Society. 
To Ph. Pusey, Esq., 31. P. 
My dear Sir, — You have inquired of me what may be the cost 
of drainage to parties disposed to manufacture their own pipe- 
tiles, and to execute the work on the most economic and effective 
principles as to depth and distance. 
The following Table contains particulars of the cost of very 
perfect draining, performed by tenant-farmers, at various depths 
and distances, who purchased their pipes at the different tileries 
in their respective districts, and therefore at different prices. 
But, in order to place the matter clearly under the eye of any one 
disposed to erect his own tilery and drain his own estate, I have 
reclamed the pipes at one common price ; viz., Gs. per thousand 
and per thousand feet — a price at which, I have no doubt, they 
may be manufactured, in most cases, and delivered into fields 
within a compass of 3 to 5 miles from the site of the proprietor's 
