Choosing a Latitude-Correct Sundial for Tennessee

Horizontal sundials are cast for one latitude (gnomon angle = latitude). Mass-produced ones often match Birmingham, UK (52°) or Spain (37°)—wrong for Tennessee (~35–36°). You can shim the base to correct the angle. Research: sundials.co.uk/setup.htm, Wikipedia 'Gnomon', du.edu/~jcalvert/astro/gnomon.htm. Do the math—it's a fun project.