The Survival Sundial. | Astro Navigation Demystified
SGWEN - VII ème Caire - How to Make a Horizontal Sundial A sundial is a device that tells the time of day when there is sunlight by the apparent position of
How To Build A Horizontal Sundial | HACK A WEEK
Analemma Sundial Applet
A Sundial for 45 degrees latitude
Fun and Learning: Sundial Kits with building instructions | Guidance (archived)