Geology of the Keytliorpe Estate. 105 



The following will then be the cost of the draining of these 398J'acres : — 



£. s. d. £. s. d. 



Labour 632 0 0 



Pipes— 156,000 U inch, at 16s. . . 124 16 0 

 „ 156,000 3-inch, at 35s. . . 273 0 0 



397 16 0 



£1029 16 0 



Comparing this with the equidistant and up-and-down system, labour and 

 materials being charged at the same prices as before, we have 



£. s. d. £. s. d. 



At 8-yard intervals, 110 perches of drain, at 6^d. 

 4 perches of mains, at Is. . . . 



Pipes— 1815 U inch, at 16s 19 0 



66 3-inch, at 35s 0 2 3 



At intervals of 10 yards we have 88 perches of 

 drains, at 6^d. ...... 



4 perches of mains, at Is. .... 



Pipes— 1452, at 16s 13 



66, at 35s 0 2 3 



The cost of draining 398f acres on the equidistant system, 

 with intervals of 8 yards, at 4/. 12s. 6d. an acre, will be . 

 The cost on the Keythorpe system will be . . . 



Saving . 



The cost of draining irith intervals of 10 yards, at 3/. 15s. Sd. 

 an acre, will be ....... 



The cost on the Keythorpe system will be . . . 



Saving , 



The average cost of the equidistant system, half of the 

 drains being at intervals of 8 yards, and half at intervals 

 of 10 yards, vrdl be ...... . 



The cost of the Keythorpe system will be . . . 



Saving 



2 



17 



3 



0 



4 



0 



3 1 



3 



1 



11 





£4 



12 



6 



2 



5 



10 



n 

 u 





0 



2 



9 



10 



1 



5 





£3 



15 



3 



1844 



4 



4 



1029 



16 



0 



814 





4 



1500 



5 



11 



1029 



16 



0 



470 



9 



11 



1672 



5 



1 



1029 



16 



0 



642 



9 



1 



During a recent visit to Keythorpe I saw a hole full of water within three 

 yards of the end of a drain, for no other reason than that there was a_ ridge of 

 clay between them. It is evident, therefore, that a drain laid in this ridge, 

 or parallel to it, would have been inefficient at even less than half the smallest 

 interval usually considered sufficiently narrow for soils of this description 

 lander the equidistant system. 



