G'morning David,

 DW> Most northern dials would be useless in any orientation in the southern
 DW> hemisphere. Up here, shadows move clockwise (which is probably why
 DW> clocks are made to turn that way). Down there, shadows go
 DW> anticlockwise. A trip around the universe might turn one into the
 DW> other, but not much else.

Heh-heh...  I don't recall any of the debate mentioned that so- 
obvious fact !  I will make a special effort to sight the 
replacement that the Remuera Library installed and check out the 
labelling....

 DW> When I was in Chile a few years ago, I decided it would be fun to bring
 DW> a southern-hemisphere sundial back to Canada. But such a thing was
 DW> nowhere to be found. Nobody had ever heard of one. So I made one, and
 DW> set it up in a friend's back yard in Santiago. His daughter took
 DW> pictures and made it the subject of a school project. It led to great
 DW> amazement.

Well done - kids take to such things much faster than adults.

 DW> Only a very unusual kind of dial would be usable in both hemispheres,
 DW> with appropriate adjustments.

Sparse labels might do it - with fudging....

           XII
      --        --

 VI         +        VI

...would work alright with hourly unlabelled intervals.

Miles.
 
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