->  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.... 
  
I should have said that shadows *cast onto a horizontal surface* move 
anticlockwise in the southern hemisphere. If the're cast onto a 
vertical surface, they can move clockwise. That's why a British sundial 
might work down there if it's attached to a north-facing vertical wall. 
  
Let us know what you find at the library. 
  
                          dow 
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