APPENDIX. 73 



carried away by the floods ; but this takes place only 

 where brufh-wood of any fort may be thrown in indif- 

 criminately, and where the aftion of the water is not 

 fevere. 



Whatever means may be ufed in fecuring the brufh- 

 wood, they are of no further ufe "after two or three 

 confiderable floods have taken place, as the quantity of 

 fand, &c., collected by that time, is moil commonly 

 fufficient to do the bufmefs for ever after. 



Roots of aquatic plants are always fcattered plenti- 

 fully on the bare parts, before the brufh-wood is kid 

 on, which foon vegetate, and make their way upwards 

 through the brufh-wood, and aflift in a furprifing man- 

 ner to arreft the fand, &c. The common couch-grafs, 

 fo deftru&ive to fome cultivated land, is found to an- 

 fwer extremely well, when ftrewed on the bare parts, 

 before the brufh-wood be laid on ; many other plants, 

 not merely aquatic, will anfwer the fame purpofe. 



Several large pits, and aukward fpots, have been 

 filled from time to time, in the holmy grounds in the 

 neighbourhood of the river, and made completely event 

 and uniform with the circumjacent land, by fimply 

 throwing in brufh-wood of any fort, covered with a 

 few fods and ftones, to prevent it from rifing, or being . 

 carried off by the floods. 



At Rafh fuch places are confidered as receptacles, 

 for the purpofe of concealing the vaft quantities of 

 brufli-wood, perpetually produced from the thinning 



of 



