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> Dorsum

> Sun-Dials


 

Intro
This page. A click on the thumbnail on top left of the page brings up the main page.

Dorsum = Astrolabe
Description of a model of a 500 years old astrolabe and how to use it.

Sun-Dials
Presentation of 10 portable Sun-Dials and how they are to be used.

 
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