They are adapting a military device to the purposes of an industrial age.
[23] Since the invention of artillery, the rectangular street-plan has been regarded by soldiers as useful in defending the streets of a town.

Aristotle, however, expressly observes in the _Politics_ that, in street warfare, tortuous lanes were far better than straight avenues for the defence, and he recommends that the rectangular pattern should be adopted only 'in parts and in places', though he does not explain how this would work out (_Politics,_ iv.

11, p.

1330).
[Illustration: FIG.6.GENERAL OUTLINE OF PRIENE.
A, B, C.Gates.D, E, F, H, M, P.Temples (see fig.

7).