Sed. III. Agriculture and Vegetation. 189 



the water remain in the. ground. It would 

 appear likewife* that the narrower the 

 ridges were made, provided they were above 

 the ftagnating water, the fooner would the 

 water fall through them, to get at the 

 furrow. The furrow mould be made with 

 a double mouldebread plough, that both its 

 fides may flope. Marling the ground, as I 

 faid before, makes it drier, by opening 

 and loofening the foil. A field manured in 

 this way, will be fit fourteen days fooner 

 in the Ipring for ploughing. If thefe me- 

 thods do not fuceeed, on account of water 

 arifing from fprings, open or hollow drains 

 muft be made at different diftances. Open 

 drains feems beft, if the fprings be not toq 

 many, 



SECT. III. 



Of rains. 



GREAT rains are considerable impe- 

 diments to the proper concodlion of 

 the juices in the veffels of plants, and alter 



very 



