105 



unaccompanied with a limitation; lest, 

 when he has ridged up his land threeyeef, 

 he should discover that he can raise the 

 water only three inches. If the land in- 

 tended for irrigation is greensward, I 

 should never recommend the introduction 

 of the plough ; it is a great loss of time as 

 well as of turf " Spaces that are level/* 

 are brought into a form somewhat re* 

 sembling a ridge of land, with a very 

 little trouble, and at a light expense, with 

 the spade, and immediately become pro* 

 ductive. I have attempted to give a re* 

 presentation of this imitation of a ridge, 

 in Plate 1. Fi^. 1. 



Page 508. " Upon dr}^ slopes, nothing 

 " more is requisite than to cut trenches of 

 f* delivery, which operate by alternate 

 ♦' watering both as deliverers and as 

 ^* drains, This is a point little under- 



" stood/' 



