THE BOULEVARDS. 



125 



the whole of this section the owners of the adjacent property 

 were obliged to set apart a strip of ground, thirty- three feet 

 wide, enclosed by an iron railing of uniform character, and 

 laid out as a pleasure-garden. They were also forbidden to 

 let out any of the premises for trading or manufacturing 

 purposes. 



Fig. 49. 



Avenue de Breteuil : the artesian well of Grenelle, and the Invalides. 



The part between the Place du Eoi de Rome and the 

 Quai de Billy was begun and finished in 1866. The incline 

 of 27 in 1000 that was obliged to be given to this portion 

 of the road also necessitated large excavations of an average 

 depth of six feet between the Boulevard du Roi de Rome 

 and the Place Chaillot ; whilst from this point to the Pont 

 de TAlma an embankment had to be made in some places 



