I CO 



TREATISE 



After thefe grounds have been paftured for eight or ten years,, 

 fuch of them as are tolerably dry may be converted into corn- 

 land, by taking away the line of trees at twenty feet afunder^, 

 which will leave the plantation at eighty feet by forty, a diftance 

 that will do little (if any) injury to whatever grows about it, but 

 v.^hich, by alternately and judiciouily varying the crops, wilL 

 improve both the corn and grafs for ever.. 



The leaves of no tree yet known has fo good an effe^l in' 

 compoft foil as that of the Poplar, nor v/ill any fo foon thicken 

 the earth on which they grow, to vvhich may be added that of 

 its being a very handfome chearful plant.. 



Thus, at a very inconfiderable expence, large tracts of wafte 

 land in thefe kingdoms, that now produce no ufeful thing,, 

 might, in a few years, be rendered beautiful, warm and fruitful. . 

 Should it not then be a reproach to the owners of thefe unculti- 

 vated places, that an experiment fo eafy and cheap, as putting a 

 parcel of cuttings in the ground in fuch a manner as here di-- 

 reeled, is not tried ? the fuccefs of v/hich is certain, and which, 

 if judicioufly pradlifed by a fev7, would as certainly be followed 

 by numbers to a very great and general improvement., 



"Th e trembling Poplar does not grow to the m.agnitude of the 

 other forts mentioned, and is therefore lefs proper than they for 

 the purpofes defcribed, but is, amongft all the trees yet known, 

 the fittefl for planting by the fides of rivers, to prevent their in- 

 croachments. , 



The wood of all the Poplars is ufed for different purpofes, by 

 the turner, the cart-wright, and cooper for hoops ; and that of 



