Hello Friends,
The Compendium for September 2004 (vol 11, number
3) p. 11-17 has an article by Gianni Ferrari with
a lot of information about Mario's sundial -- see
Part 2, "Sundial With Hour Windows."
Best wishes,
Mac Oglesby
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Dear Willy,
in the year 2001, with the mathematical help of
Gianni Ferrari, I made a sundial un a
semicilinder surface.
The dial is inside a fountain, and it works in a
different way of an usual sundial. The light
pass through the back of the cilinder inside
narrow windows, and reach a little rounded
window (one for each hour) in the front of it
(the concavity).
You may see images at the address
<http://digilander.libero.it/McArdal/Fontana_delle_ore.htm>http://digilander.libero.it/McArdal/Fontana_delle_ore.htm and
the photos of the work in progress on the page
<http://digilander.libero.it/McArdal/Fontana%20delle%20ore2.htm>http://digilander.libero.it/McArdal/Fontana%20delle%20ore2.htm in
this page one of the photos shows the noon round
window completely lighted.
Mario
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Mario Arnaldi
Via Cavour, 57/c
48100 Ravenna
Italy
Lat. 44° 25' N - Lon. 12° 12' E
Redazione di "GNOMONICA ITALIANA" rivista di
storia, arte, cultura e tecniche degli orologi
solari
ID Yahoo Messenger: "mcardal"
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ID Skype: "mcardal"
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