NASS - North American Sundial Society

- sundials.org

NASS North American Sundial Society for sundials, gnomonics, history of sundials, theory of sundials, making sundials, using sundials, sundial education, teaching sundials, sundial curriculum, sundial construction, sundial design, sun and shadows, solar analemma, analemma calculation, equinox, solstice, and...

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