Aleksandr wrote:
In English version of my web-site a have just created a new page. Please,
visit it and share with me my small success which I have formed in a way
of picture story.
A beautiful dial, beautifully crafted. Don't miss this link SML members.
Hello All:
Here is a PDF file (about 600KBs) that shows a new nodi shadow experiment. This is an expanded version of my original experiment and includes 12 different nodi designs. All the nodi are the same height but are different designs.To see photos of the experiment click on this link:
Dear John,
That is a splendid experiment...
http://advanceassociates.com/WallDial/NodusShadowExperiment.pdf
It illustrates all kinds of interesting aspects of nodus design
The Purpose, Setup and Execution all earn top marks. The Conclusion,
though, is subject to a little caveat...
Let's
Sunny Day,
I don't know how important it is, but I have a site showing the development
of a monumental sundial located in my community that I was the project
leader for. It was a millennium project. There are many photos that show
the construction of all the various parts of the sundial;
Hi Frank:
I'm still pondering all of the information you gleaned from my experiment.
You have given your comments a lot of thought and I don't want to quickly
dismiss anything you said as being inaccurate without being sure first.
But I need to point out something important about the light
One problem I've personally encountered with a pointed post gnomon is
that if the post's shadow falls too close to the foot of the post,
the shadow of the tip may be lost in the shadow of the post's
shoulder. This was on a vertical decliner.
Mac Oglesby
Hi Mac:
Yes, on a perpendicular cone or pointed rod gnomon, the slope of the point
or cone could cause a self-shading problem if the cone or point is too wide
at the bottom (a fat cone). But you can easily determine the maximum
allowable width of the cone or point and avoid that design
