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little good. Haying seen this so clearly demonstrated by myown experience on a floated meadow in England, I have ne-ver tried it in the North of Scotland , unless in some trifling in-stances ; and I have still observed the effects to be the same. Ifwater be used after once or twice straining over the land, themeadows should be so much circumscribed as to make the wa-ter that went over the first meadow at three times, to go overtire second at twice, and so on, always observing to use quantityof water for quality ; for the poorer the water is, the more weeksit will reqirr* to be on the ground. Again, if a stream be rich,the less time will do in a season at a time ; but when the wateris turned again into the bed of the river, and taken out again :ilittle space below the first meadow, then the water used as aboveon the second,' will shelter the grass in ordinary times cf water,and in floods it will enrich the land. I have been the more par-ticular on the above part of the subject, because I know that in-attention to this circumstance has been productive of great de-ceptions, and sometimes has hurt the credit of Irrigation.
As the succeeding plates are designed for information to theNorth of Scotland , they are adapted to the position cf the sub-jects fit for irrigation there : Of which it may be observed,1st, that most of the hangh or meadow land there is lowestat the side next to the river ; that the most of this kind ofland is commonly highest in the middle of a haugh, i. e. betweenthe river and the next brae ; 3 dly, that very commonly thereis a hollow on the side of the haugh or meadow opposite tothe river, and betwixt a brae and the haugh. Now, as theground rises from the river to the middle of the piece of landwanted to be floated, (as is generally the case here), it willbe necessary to take the water out above the land wanted to befloated, in order to get it carried to the most elevated spot inyour designed water-meadow. When a meadow is highest inthe middle,, and is long enough to be made into two divisions,the second feeder must be carried down the centre of it, to makethe water fall off to right and left on the second divisions, as maybe seen by Plate II. This second plate also shows the use ofthe hollow for cutting a main drain in, for carrying the waterfrom that part of the meadow into the river again. As theground rises from the river as above noticed, there is no dangerot want of declivity for reconducting the water back again, to thefiver in this country (if it can be got on), as is sometimes thecase in England, in flat land ; for there the ground is frequentlyhighest at the edge of the river, which makes it necessary some-times to carry the water a considerable distance below the endof the meadow, before a sufficient fall or descent can be got foragain returning the water into the bed of the river. The case isjust the reverse here in Scotland ; for the water must be taken outabove the meadow ; and it will of course go in again at the end,