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Bill,

> Agreed. If outdoors will work in a November
> with December temperatures, how
> about the old K-Mart parking lot?

Are not people driving and walking there all the time?

> (so we don't screw up the dot-to-dot readings with an off-plumb target)

This should give a negligible effect.
I suppose the screen can be just held in our hands.

> A pair of fine-point dividers to establish center-to-center
> or edge-to-edge distance and an engineering
> rule should get us within 0.1"
> to 0.25" of dot-to-dot.

My dividers and ruler have much higher precision, definitely better
than
0.05 of an inch approx 1 mm.

> I still have reservations about dot size due to focus at 50 ft vs.
> 500 ft,

This is why Frank mentioned that the telescope has to be good.
Certainly, I would rather have my inverting one
for these experiments. But I hope that the prizmatic one from Frank's
sextant is also good enough.

Alex.


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