Doug,
I didn’t answer your second question:
"Assuming that in 1850s I had access to a good transit telescope, and a
reasonable clock (daily errors about 1 second a day), how would I refine the
quarter of a day into several decimal places?”
The formula is:
Year = (1 day – transit time differenc
The sundial mentioned by Dan Uza is a diptych made in recent years in
imitation of those manufactured in eighteenth century in Europe.
Sundials of this type are sold in some specialized shops (very few) in
Italy and France.
On the dial, at top, is written the name GUAYTAMELLI , that is the name of
This sundial seems too fanciful to me, with the ship, the Latin motto, and the
green foliage (that looks like a dancing cactus to me!) to be an actual copy of
an earlier one. It is 20th century, but I don’t know from the photos if it is
circa 1920. It could be some sort of souvenir from a mu
Compass doesn't look quite right - if it's German I might expect East to be
written as Ost.
*Patrick Vyvyan*
*Presidente*
*Corporación Cultural de Putaendo*
On 20 February 2017 at 12:22, Michael Ossipoff
wrote:
> It doesn't seem genuine to me.
>
> It isn't just that there doesn't seem to b
It doesn't seem genuine to me.
It isn't just that there doesn't seem to be a way of moving the upper end
of the string to the other latitude-marks. It's also that you can't just
change the angle of the gnomon, for a different latitude, and use the same
hour-lines.
So there seems to be no purpose
Hello!
There's a diptych sundial on sale for about 80 euros supposedly dating from
1920.
Do you think this is genuine? I think it is a modern replica.
http://anticariatulnou.ro/diverse/antichitati-artizanat-colectionabile/cadran-solar-cu-busola-antica-din-lemn-diptic.html
The string does not se