Dear Dialists!
I want to make a sundial with a cannon. Have somebody declination about the
cannon?
Thank You!
Geza
idomes...@mcse.hu
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https://lists.uni-koeln.de/mailman/listinfo/sundial
Hi folks,
http://www.pinterest.com/pin/301178293801331061/
What type of dial is this; I realize it's a form of altitude dial, but
is there a specific name for it?
The accompanying note states that the dial can be adjusted for latitude
by moving the attachment point. I don't understand which
I don't know the name, but I believe the moveable attachment point is where
the hanging loop clamps to the dial plate. Moving that will rotate the dial and
altitude scale relative to vertical.
Dave
Sent from my iPhone
On Jun 1, 2014, at 3:13 PM, Steve Lelievre
Dave,
That's the point I'm struggling to understand. I'm assuming a chain is
used to suspend the dial in use, but wouldn't it adjust itself to bring
the centre of gravity back under the point of suspension - effectively
making it impossible to rotate the dial face?
Steve
On 01/06/2014
The benefit of an altitude dial is that it does need to be aligned with the
polar axis. With that concept in mind then a latitude adjusted altitude dial is
not feasible.
However, if one gives up that benefit, and takes an altitude dial and then
tilting it towards the pole, or away from it, in
The June issue of The Compendium is out (or soon will be!).
This issue includes an article by Jeffrey Kretsch: Sundials For Indicating
Ultraviolet Exposure.
One of the references Jeff cites at the end of his article was printed
incorrectly. It should be:
*
The benefit of an altitude dial is that it does need to be aligned with the
polar axis. With that concept in mind then a latitude adjusted altitude dial is
not feasible.
However, if one gives up that benefit, and takes an altitude dial and then
tilting it towards the pole, or
