[time-nuts] Information on the Danjon Astrolab
phk at phk.freebsd.dk
Tue Aug 8 03:59:00 EDT 2006
In message <7ntf7JA6qD2EFwuF at g8kbz.demon.co.uk>, Geoff Powell writes:
>IIRC, the Danjon astrolabe uses a mercury pool, and a semi-reflecting
Hmm, but doesn't the local value of "horizontal" affect the precision
You would really need to know the direction of local gravity for
this to be any good...
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