-=> Quoting Reggie Arford to Gregory Procter <=-
 RA> As I understand it, it is the angle between the chord and the arc.
 RA> (What's a "versine"? Thought I'd had all the plane geometry
 RA> there is... ) :)
      Perhaps we use different terminology in NZ.
      (perhaps I use different terminology to the rest of the world :-)
      Versine is the line between the chord and the arc at the center.
 GP>      The versine/chord measurement is easy for anyone with a string, 
ape
 GP> measure and radius manual to check. Do you know how the
 GP>angle was/is measured,
 GP> the accuracy of measurement of the angle would have to be very precise, 

 GP> minute or twos error would be a big change in radius.
 RA> I doubt anyone really woried. You see, the Friends of the East
 RA> Broad Top RR has obtained complete right-of-way maps for the RR,
 RA> circa 1917, drawn by the RR itself. They show curves' radii. ;)
 RA> Reggie Arford
It would be interesting to see the method of laying out the curves, I assume
they don't use a huge compass ;-)
      Greg.
      sorry for the long delay in replying, busy, busy,busy!
  
... Catch the Blue Wave!
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