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G. H. KNIBBS. 



very well be combined with the hexagonal and other forms of the 

 radial system. Again it may often happen that the convergence 

 of only six roads upon one point is inadequate. For example, in 

 Paris at the Arc de Triomphe there are no less than 14 avenues 

 or streets converging, at the Place de la Bastille 10, at the Place- 

 de la Nation 9 : in Washington at the Capitol there are 11 long 

 convergent streets, and 8 and 10 in other places in the same city. 

 When therefore a centre is of more than ordinary importance, it 

 may be as the site of some great establishment or monument, or 

 as the theatre of intense business activity, the number of con- 

 vergent streets may be increased from say 6 to 12, and such a 

 centre properly constitute a focus both of the radial and rectan- 

 gular systems combined. The City of Washington is an illustration 

 of the rectangular combined with the radial system, the former 

 preponderating, see Fig. 6. (See Fig. 9 for polygonal radial system.) 



Fig. 6. 



When it is considered that the importance of securing the full 

 advantage of shortness in path of travel from point to point 

 diminishes as the total amount of traffic in any street diminishes, 



