[r-t] Minor principles

[Glenn Taylor]

---Mark---
> 1. I need to ring an extent to name it, so I can get the plain course into
> the damned method libraries.


Does one have to ring EXACTLY an extent to be able to name it, or is it
sufficient that an extent exists (even though one might subsequently choose,
for convenience, to ring "the extent" within a 1440) ?

Glenn Taylor