somebody wrote:
> Another incidental benefit, but not the ultimate reason. Manholes have
> always been predominantly round, even in cobblestone streets, which are not
> designed for repaving higher,

Well, sure. Are manholes older or newer than paved streets, tho? Once 
you have paved streets and decide you need manholes to be round for 
them, one might decide that one might as well use manholes on paved 
streets, as well?

> http://images.google.ca/images?hl=en&q=cobblestone%20manhole ). 

Funny enough, the first image at that link shows a square manhole for 
me. :-)


-- 
Darren New / San Diego, CA, USA (PST)
  Helpful housekeeping hints:
   Check your feather pillows for holes
    before putting them in the washing machine.

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