MAY.] FORM NEW WATERED-MEADS. 3O() 



round hills or holes, yet will make no breach in 

 the principles which govern the irrigation. 



Here, it appears, that if water from the main 

 carrier, river, or ditch, 31, he let into the deliver- 

 ing trench, 32, and the stop, 33, he let down, the 

 water will flow over the division of the meadow 

 (or pane, as Mr. Boswell calls it) 1 . The deliver- 

 ing trench, 34, then acts as a drain, and conduces 

 the water into the trench, 35, the stop, 36, being 

 let down ; thence, of course, it overflows the pane 

 No. 2, and in like manner, successively, No. 3, 4, 

 and 5. If the stop, 33, be drawn up, and the 

 stop, 37, let down, the panes 6, 7, 8 and <), are 

 watered in the same way ; and so on by the stops 

 38 and 3C), which will water the panes 10, 11 and 

 12; also 13 and 14: and the stop, 40, being let 

 down, and 41 drawn up, the pane, 30, will be 

 watered. Then return to the ditch at the other 

 end of the field, and letting clown the stops, 42 

 and 43, it is evident that the water will flow into 

 the trench 34, and the stop, 44, being down, the 

 pane, 15, is watered, and the trench, 45, becomes 

 a drain, which, successively, conducts the water, as 

 above explained, over the panes 16, 17, 18 and 

 19. Now it is clear, that when the trench, 4(3, 

 becomes supplied with water, and the trenches, 34 

 and 45, are empty, that the panes, ] and 15, are 

 in a perfect state of drainage ; and this may be 

 sufficient to explain the system, and to shew how 

 every trench operates, either for delivering or drain- 

 ing off the water, at the pleasure of the irrigator. 



x 3 And 



