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Bill,

> > Without averager, error -1.6.a
>
> I don't see figures to support -1.6a.  What is -1.6a? What was the sigma?

error -1.6 means that I made only one observation,
and the error of this observation was -1.6
The "a" after "-1.6." is a misprint.

> > Without averager: errors -3.5, -2.7, -3.4, -4.1, 0.0, -2.8.
>
> Which would be average -2.75, sigma 1.4. Yes?

Yes.

> Have you attempted do place
> Venus or a star on the top edge then bottom edge
> of the bubble and manually average?

No I did not. And for a good reason,
which also answers the question recently asked by
Jean-Philippe:
My sextant bubble has a tendency to grow with time.
(Sometimes it does sometimes it does not, probably
this depends on the temperature and pressure conditions).
I tried to release the bubble screw completely;
this does not help.
In general this is a minor nuisance but it prevents
the type of observation Bill asks.

Alex.



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