In the Hemicyclium discussion, the OP mentioned having 6-inch copper
tubing. So, though it was a bit off-topic, I suggested that the tubing
could be used for an additional, quicker, project, to make a south
windowsill sundial--a Circumference-Aprerture Cylindrical Equatorial Dial.
But, when I
I find the video below extremely instructive!
https://youtu.be/0hs6QqwJIhs
The sundial is marked in old temporary (or seasonal) hours. Changing them
to modern hours does not make much sense to me.
For it to become a hemicyclium I guess you just have to leave out the
unused part of the
Hi Patrick,
Thanks for pointing this out. Fortunately, I am still alive and sometimes
kicking a bit ...
I put the link to Fer de Vries' article temporarily on my own website as it
was the quickest and easiest way to answer a query by someone on this list.
By now, the (same) article is also
