( 6i ) 



and fifty, to two hundred feet; which they think the 

 utmoft width that can be given, without rendering the 

 avenue difproportionate to the trees that border it. 



In the conftruclion of roads and walks, the Chinefe 

 Gardeners are very expert, and very circumfpecl: they 

 never fituate them at the foot of mountains or riling 

 grounds, without contriving drains to receive the waters 

 defcending from 1 the heights, which are afterwards dis- 

 charged by arched gulleys under the roads, into the plains 

 below; forming, in the rainy feafon, a great number of 

 little cafcades, that increafe the beauty of the fcenery. 

 The roads which are defigned for carriages, they make as 

 level as poffible ; they, give them a folid bottom, and fhape 

 them fo as to throw off the rain-waters expeditioufly : 

 they ufe, as much as poffible, the neareft materials, to 

 fave expence; and are very judicious in employing different 

 foils to form mixtures, which never become either hard 

 or ilippery ; never loofe in dry weather, nor deep in wet; 

 not eafily ground into powder; nor ever forming a rough 

 flinty furface, difficult and painful for horfes to move 

 upon. 



