52 CONTENTS. 



PAGE 



Deep-drained Lands are capable of absorbing more Rain without 



superficial discharge than shallow-drained Lands . .115 



Authorities in favour of deep Draining Sir Kobert Peel, Earl of 



Lonsdale, Dukes of Northumberland and Bedford . 115-118 

 Warming and Ventilating retentive Soils rank among the most 



important effects of Land Drainage . . . .119 



Amateur Draining, Draining Engineers and their Services 121-123 

 Average cost per acre of 4-feet Drainage .... 123 

 POSTSCRIPT : 

 Observations on the action and effect of deep Drains executed in 



the years 1846 to 1850 ..... 123-125 

 Device for examining the Working of Drains, and importance of 



retaining a Plan of the Drainage of every Field . . 126 



Plates illustrative of Drained Land .... 127, 128 

 Plate of Draining Tools . . . . . .129 



